PMC4118GWSN - Ericsson, Inc.

Key Features

• Wide input, 3.0-5.5 Vdc

• Programmable output, 0.75 - 3.6 Vdc

• Under voltage protection

• Short circuit protection

• Remote sense

• Remote On/Off

• Design for Environment (DfE)

• European Commission Directive 2002/95/EC

(RoHs) compliant

EDatasheet

DC/DC regulator

Input 3.0 - 5.5 V

Output 10 A

PMC 4318T WS

The PMC series of surface mount DC/DC regulators

(POL) are intended to be used as local distributed

power sources in distributed power architecture

level 4. The high efficiency and high reliability of the

PMC series makes them particularly suited for the

communications equipment of today and tomorrow.

These products are manufactured using the most

advanced technologies and materials to comply

with environmental requirements.

Designed to meet high reliability requirements of sys-

tems manufacturers, the PMC responds to world-class

specifications.

Ericsson Power Modules is an ISO 9001/14001

certified supplier.

Contents

Product Program ......................2

Mechanical Data ......................3

Connections .........................3

Absolute Maximum Ratings . . . . . . . . . . . . . 4

Input ...............................4

Product Qualification Specification . . . . . . . . 5

Safety Specification . . . . . . . . . . . . . . . . . . . 6

Adjusted to 1.0 V out - Data . . . . . . . . . . . . . 7

Adjusted to 1.2 V out - Data . . . . . . . . . . . . 10

Adjusted to 1.5 V out - Data . . . . . . . . . . . . 13

Adjusted to 1.8 V out - Data . . . . . . . . . . . . 16

Adjusted to 2.5 V out - Data . . . . . . . . . . . . 19

Adjusted to 3.3 V out - Data . . . . . . . . . . . . 22

EMC Specification . . . . . . . . . . . . . . . . . . . . 25

Operating Information . . . . . . . . . . . . . . . . . 25

Thermal Considerations . . . . . . . . . . . . . . . 28

Soldering Information . . . . . . . . . . . . . . . . . 29

Delivery Package Information . . . . . . . . . . . 30

Reliability ...........................30

Compatibility with RoHS requirements . . . . 30

Sales Offices and Contact Information . . . . 31

2 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Product Program

Delivery option M.o.q. Suffix Example

Tape & Reel 200 pcs /C PMC 4xxxT WS /C

Ordering Information

* Input voltage limited to 3.8-5.5V for 3.3 Vout and for output voltages of 3.3V and 4.5-5.5 for output voltages above 3.3V.

VO/IO max PO max Ordering No. Comment

Output 1

3.0-5.5 V* 0.75-3.3 V/10 A 33 W PMC 4318T WS Standard version

3.0-5.5 V 1.0 V/10 A 10 W PMC 4118N WS On request

3.0-5.5 V 1.2 V/10 A 12 W PMC 4118L WS On request

3.0-5.5 V 1.5 V/10 A 15 W PMC 4118H WS On request

3.0-5.5 V 1.8 V/10 A 18 W PMC 4118G WS On request

3.0-5.5 V 2.5 V/10 A 25 W PMC 4219 WS On request

3.8-5.5 V* 3.3 V/10 A 33 W PMC 4310 WS On request

Option Suffix Example

Negative Remote Control logic N PMC 4318T WS N

3 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Pin Designation Function

1 RC Remote Control

2 + In Positive input

3 Gnd Ground

4 + Out Positive output

5 Vadj External output adjust

6 + Sense Positive remote sense

Dimensions in mm[inch]

Tolerances (unless specified):

x,xx ±0,25[0,01]

Pin true position w ithin 0,4[0,016]

�

4,83(3x)

[0.190]

7,54

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7,87

[0.310]

10,92

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10,29

[0.405]

3,80

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2,6

[0.102]

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max 8,25

[0.324]

Co-planarity max 0,1[0,004]

33,00

[1.299]

13,46

[0.530]

2,70(6x)

[0.106]

4,83(3x)

[0.190]

[0.310]

7,87 7,54

[0.297]

10,29

[0.405]

10,92

[0.430]

1,50(6x)

[0.059]

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Connections Weight

7 g

Mechanical Data

Pins

Material: Copper

Plating: Flash gold over nickel

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4 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Characteristics min typ max Unit

Tref Operating Reference Temperature, see pg. 27 -45 +115 ˚C

TSStorage temperature -55 +125 ˚C

VIInput voltage -0.3 +5.5 Vdc

Characteristics Conditions min typ max Unit

VIInput voltage range 3.0 5.5 Vdc

VIoff Turn-off input voltage

Ramp from higher voltage, Vout set to 1.0-2.5 V 2.6

Vdc

Ramp from higher voltage, Vout set to 3.3 V 3.5

VIon Turn-on input voltage

Ramp from lower voltage, Vout set to 1.0-2.5 V 2.7

Vdc

Ramp from lower voltage, Vout set to 3.3 V 3.6

CIInput capacitance 20 µF

PIi Input idling power Io = 0 A, VI = 5 V 570 mW

PRC Input stand-by power (RC active) Non operation, VI = 5 V 7.5 mW

VIac Input ripple 1) 20 Hz ... 5 MHz, Iomax, VI = 5 V 300 mV

Input

Stress in excess of Absolute Maximum Ratings may cause permanent damage.

Absolute Maximum Ratings, sometimes referred to as no destruction limits, are

normally tested with one parameter at a time exceeding the limits of Output data

or Electrical Characteristics. If exposed to stress above these limits, function and

performance may degrade in an unspecified manner.

Absolute Maximum Ratings

Tref = -30 ... +90 ˚C, VI = 3.0...5.5 V unless otherwise specified

Typ values specified at: Tref = +25 ˚C, VInom, Iomax = 10A

1) Measured with 2 x 22 µF ceramic capacitors

Fundamental Circuit Diagram

GND

PWM

+IN +OUT

+SENSE

Vadj

controller

Ref

GND

Error

amplifier

RC RC

GND

Block

5 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Characteristics

Random Vibration JESD 22-B103-B Frequency

Acceleration density

2 ... 500 Hz

0.008 ... 0.2 g2/Hz

Sinusoidal vibration JESD 22-B103-B Frequency

Acceleration

10 ... 1000 Hz

10 g

Mechanical shock

(half sinus) JESD 22-B104-B Peak acceleration

Duration

200 g

1.5 ms

Lead integrity JESD 22-B105-C Weight of 1000 g All terminals

Temperature cycling JESD 22-A104-B Temperature

Number of cycles

-40 ... +125 ˚C

300

Accelerated damp heat JESD 22-A101-B

Temperature

Humidity

Duration

Bias

+85 ˚C

85 % RH

1000 hours

max input voltage

Solderability

IEC 60068-2-54

(Aged according to JESD 22-

A101-B, 240h no bias)

Solder immersion depth

Time for onset of wetting

Wetting force

1 mm

< 4 s

> 100 mN/m

Cold (in operation) IEC 60068-2-1A, test AdTemperature

Duration

-45 ˚C

72 h

High temperature storage JESD 22-A103-B Temperature

Duration

+125 ˚C

1000 h

Product Qualification Specification

6 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Ericsson Power Modules DC/DC converters and DC/DC regulators

are designed in accordance with safety standards

IEC/EN/UL 60 950, Safety of Information Technology Equipment.

IEC/EN/UL60950 contains requirements to prevent injury or

damage due to the following hazards:

• Electrical shock

• Energy hazards

• Fire

• Mechanical and heat hazards

• Radiation hazards

• Chemical hazards

On-board DC-DC converters are defined as component power

supplies. As components they cannot fully comply with the

provisions of any Safety requirements without “Conditions of

Acceptability”. It is the responsibility of the installer to ensure that

the final product housing these components complies with the

requirements of all applicable Safety standards and Directives for

the final product.

Component power supplies for general use should comply with

the requirements in IEC60950, EN60950 and UL60950 “Safety of

information technology equipment”.

There are other more product related standards, e.g.

IEC61204-7 “Safety standard for power supplies",

IEEE802.3af “Ethernet LAN/MAN Data terminal equipment

power”, and ETS300132-2 “Power supply interface at the input

to telecommunications equipment; part 2: DC”, but all of these

standards are based on IEC/EN/UL60950 with regards to safety.

Ericsson Power Modules DC/DC converters and DC/DC regulators

are UL 60 950 recognized and certified in accordance with EN 60

950.

The flammability rating for all construction parts of the products

meets UL 94V-0.

The products should be installed in the end-use equipment, in

accordance with the requirements of the ultimate application.

Normally the output of the DC/DC converter is considered as SELV

(Safety Extra Low Voltage) and the input source must be isolated by

minimum Double or Reinforced Insulation from the primary circuit

(AC mains) in accordance with IEC/EN/UL 60 950.

Safety Specification

Isolated DC/DC converters.

The input voltage to the DC/DC regulator is SELV (Safety Extra Low

Voltage) and the output remains SELV under normal and abnormal

operating conditions.

It is recommended that a slow blow fuse with a rating

twice the maximum input current per selected product

be used at the input of each DC/DC regulator.

Non-isolated DC/DC regulators.

24 V dc systems.

The input voltage to the DC/DC converter is SELV (Safety Extra Low

Voltage) and the output remains SELV under normal and abnormal

operating conditions.

48 and 60 V dc systems.

If the input voltage to Ericsson Power Modules DC/DC converter

is 75 V dc or less, then the output remains SELV (Safety Extra Low

Voltage) under normal and abnormal operating conditions.

Single fault testing in the input power supply circuit should be

performed with the DC/DC converter connected to demonstrate

that the input voltage does not exceed 75 V dc.

If the input power source circuit is a DC power system, the source

may be treated as a TNV2 circuit and testing has demonstrated

compliance with SELV limits and isolation requirements equivalent

to Basic Insulation in accordance with IEC/EN/UL 60 950.

It is recommended that a fast blow fuse with a rating

twice the maximum input current per selected product

be used at the input of each DC/DC converter. If an input filter is

used in the circuit the fuse should be placed in front of the input

filter.

In the rare event of a component problem in the input filter or in the

DC/DC converter that imposes a short circuit on the input source,

this fuse will provide the following functions:

• Isolate the faulty DC/DC converter from the input power source

so as not to affect the operation of other parts of the system.

• Protect the distribution wiring from excessive current and power

loss thus preventing hazardous overheating.

The galvanic isolation is verified in an electric strength test. The test

voltage (VISO) between input and output is 1500 Vdc or 2250 Vdc for

60 seconds (refer to product specification). Leakage current is less

than 1µA at nominal input voltage.

General information.

7 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Characteristics Conditions

Output

Unit

min typ max

VOi Output voltage adjusted setting Tref = +25 °C, VInom, IOmax, Radj 80 kΩ0.98 1.00 1.02 V

Output voltage tolerance band IO = 0.01...1.0 x IOmax 0.97 1.03 V

Idling voltage IO = 0 0.98 1.02 V

Line regulation VImin ... VImax, IOmax 11 mV

Load regulation IO = 0.01...1.0 x IOmax, VInom 10 mV

Vtr Load transient

voltage deviation Load step = 0.25 ... 0.75 x IOmax,

dI/dt = 5 A/µs, CO = 150 µF,

VI = 3.3 V

100 mV

ttr Load transient recovery time 60 µs

Tcoeff Temperature coefficient Tref = -30 ... +90 °C, IOmax -0.1 0 +0.1 mV/°C

tsStart-up time From VI connected to VO = 0.9 x VOI,

IO = 0.1 ...1.0 x IOmax, VInom 8.5 ms

trRamp-up time 0.1...0.9 x VO, IO = 0.1 ...1.0 x IOmax, VInom 4 ms

trFall time, VO x 0.1 IO = IOmax, VInom 0.2 ms

trFall time, VO x 0.1 IO = 0 A, VInom 5 s

tRCoff RC shut-down time to VO x 0.1 IO = IOmax, VInom 0.2 ms

tRCon RC start-up time to VO x 0.9 IO = IOmax, VInom 8 ms

tRC RC fall time, VO x 0.1 ... 0.9 IO = 0 A, VInom 10 s

IOOutput current 0 10 A

POmax Max output power At VO = VOnom 10 W

Ilim Current limit threshold Tref < Trefmax 16 20 24 A

VOac Output ripple 20 Hz ... 5 MHz, IOmax 10 20 mVp-p

ηEfficiency - 50% load IO = 0.5 x IOmax, VI = 5 V 88.4 %

ηEfficiency - 100% load IO = IOmax, VI = 5 V 84.5 87.1 %

PdPower Dissipation IO = IOmax, VI = 5 V 1.6 1.8 W

Fo Switching frequency IO = 0 ... 1.0 x IOmax 250 300 350 kHz

Isense Remote sense current 8 mA

IIStatic input current VI = 3.0 V, IO = IOmax, Tref = 25 °C 3.9 A

MTBF Predicted reliability Tref = 40 °C 6 million

hours

Tref = -30 ... +90 °C, VI = 3.0 ... 5.5 V unless otherwise specified. Input filter 2 x 22 µF, Output filter 1 x 150 µF

Typ values specified at: Tref = +25 °C and VInom. IOmax = 10 A. Note: +Sense connected to +Out

Adjusted to 1.0 V out - Data

8 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Output Current Derating at 5 V input

Start-Up

Output voltage vs. load current.

Available load current vs. ambient air temperature and

airflow at Vin = 5 V. See conditions on page 27.

Start-up at IO = 10 A resistive load at Tref = +25 °C,

Vin = 3.3 V. Start enabled by connecting Vin.

Top trace: output voltage (0.5 V/div.).

Bottom trace: input voltage (2 V/div.).

Time scale: 2 ms/div.

Efficiency Power Dissipation

Output Characteristics

Adjusted to 1.0 V out - Typical Characteristics

Efficiency vs. load current and input voltage at Tref = +25 °C

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Dissipated power vs. load current and input voltage at

Tref = +25 °C

General conditions: Input filter 2 x 22 µF, Output filter 1 x 150 µF

Output Current Derating at 3.3 V input

Available load current vs. ambient air temperature and

airflow at Vin = 3.3 V. See conditions on page 27.

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9 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Turn Off Output Ripple

Transient with 150 µF output capacitor

Output voltage response to load current step-change

(2.5-7.5-2.5 A) at Tref =+25 °C, Vin = 3.3 V. dI/dt = 5A/µs

Top trace: output voltage (ac) (100 mV/div.).

Bottom trace: load current (dc) (10 A/div.)

Time scale: 0.1 ms/div.

Transient with 300 µF output capacitor

Output voltage response to load current step-change

(2.5-7.5-2.5 A) at Tref =+25 °C, Vin = 3.3 V. dI/dt = 5A/µs

Top trace: output voltage (ac) (100 mV/div.).

Bottom trace: load current (dc) (10 A/div.)

Time scale: 0.1 ms/div.

Output voltage ripple (20mV/div.) at Tref=+25 °C, Vin=3.3 V,

IO=10A resistive load.

Band width=5MHz.

Time scale: 2µs / div.

Turn-off at IO=10 A resistive load at Tref=+25 °C,

Vin=3.3 V. Turn-off enabled by disconnecting Vin.

Top trace: output voltage (0.5 V/div.).

Bottom trace: input voltage (2 V/div.).

Time scale: 2 ms/div.

Adjusted to 1.0 V out - Typical Characteristics

General conditions: Input filter 2 x 22 µF, Output filter 1 x 150 µF

10 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Tref = -30 ... +90 °C, VI = 3.0 ...5.5 V unless otherwise specified. Input filter 2 x 22 µF, Output filter 1 x 150 µF

Typ values specified at: Tref = +25 °C and VInom, IOmax = 10 A. Note: +Sense connected to +Out

Adjusted to 1.2 V out - Data

Characteristics Conditions

Output

Unit

min typ max

VOi Output voltage adjusted setting Tref = +25 °C, VInom, IOmax, Radj 42 kΩ1.176 1.20 1.224 V

Output voltage tolerance band IO = 0.01...1.0 x IOmax 1.164 1.236 V

Idling voltage IO = 0 1.18 1.22 V

Line regulation VImin ... VImax, IOmax 11 mV

Load regulation IO = 0.01...1.0 x IOmax, VInom 10 mV

Vtr Load transient

voltage deviation Load step = 0.25 ... 0.75 x IOmax,

dI/dt = 5 A/µs, CO = 150 µF,

VI = 3.3 V

100 mV

ttr Load transient recovery time 60 µs

Tcoeff Temperature coefficient Tref = -30 ... +90°C, IOmax -0.1 0 +0.1 mV/°C

tsStart-up time From VI connected to VO = 0.9 x VOI,

IO = 0.1 ...1.0 x IOmax, VInom 8.5 ms

trRamp-up time 0.1...0.9 x VO, IO = 0.1 ...1.0 x IOmax, VInom 4 ms

trFall time, VO x 0.1 IO = IOmax, VInom 0.2 ms

trFall time, VO x 0.1 IO = 0 A, VInom 5 s

tRCoff RC shut-down time to VO x 0.1 IO = IOmax, VInom 0.2 ms

tRCon RC start-up time to VO x 0.9 IO = IOmax, VInom 8 ms

tRC RC fall time, VO x 0.1 ... 0.9 IO = 0 A, VInom 5 s

IOOutput current 0 10 A

POmax Max output power At VO = VOnom 12 W

Ilim Current limit threshold Tref < Trefmax 16 20 24 A

VOac Output ripple 20 Hz ... 5 MHz, IOmax 10 20 mVp-p

ηEfficiency - 50% load IO = 0.5 x IOmax, VI = 5 V 89.7 %

ηEfficiency - 100% load IO = IOmax, VI = 5 V 86.5 88.6 %

PdPower Dissipation IO = IOmax, VI = 5 V 1.5 1.9 W

Fo Switching frequency IO = 0 ... 1.0 x IOmax 250 300 350 kHz

Isense Remote sense current 8 mA

IIStatic input current VI = 3.0 V, IO = IOmax, Tref = 25 °C 4.5 A

MTBF Predicted reliability Tref = 40 °C 6 million

hours

11 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Output Current Derating at 5 V input

Output Characteristic Start-Up

Output voltage vs. load current.

Available load current vs. ambient air temperature and

airflow at Vin = 5 V. See conditions on page 27.

Start-up at IO = 10 A resistive load at Tref = +25 °C,

Vin = 3.3 V. Start enabled by connecting Vin.

Top trace: output voltage (0.5 V/div.).

Bottom trace: input voltage (2 V/div.).

Time scale: 2 ms/div.

Efficiency Power Dissipation

Adjusted to 1.2 V - Typical Characteristics

Efficiency vs. load current and input voltage at Tref = +25 °C

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Dissipated power vs. load current and input voltage at

Tref = +25 °C

General conditions: Input filter 2 x 22 µF, Output filter 1 x 150 µF

Output Current Derating at 3.3 V input

Available load current vs. ambient air temperature and

airflow at Vin = 3.3 V. See conditions on page 27.

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12 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Turn Off Output Ripple

Transient with 150 µF output capacitor

Output voltage response to load current step-change

(2.5-7.5-2.5 A) at Tref =+25 °C, Vin = 3.3 V. dI/dt = 5A/µs

Top trace: output voltage (ac) (100 mV/div.).

Bottom trace: load current (dc) (10 A/div.)

Time scale: 0.1 ms/div.

Transient with 300 µF output capacitor

Output voltage response to load current step-change

(2.5-7.5-2.5 A) at Tref =+25 °C, Vin = 3.3 V. dI/dt = 5A/µs

Top trace: output voltage (ac) (100 mV/div.).

Bottom trace: load current (dc) (10 A/div.)

Time scale: 0.1 ms/div.

Output voltage ripple (20mV/div.) at Tref=+25 °C, Vin=3.3 V,

IO=10A resistive load.

Band width=5MHz.

Time scale: 2µs / div.

Turn-off at IO=10 A resistive load at Tref=+25 °C,

Vin=3.3 V. Turn-off enabled by disconnecting Vin.

Top trace: output voltage (0.5 V/div.).

Bottom trace: input voltage (2 V/div.).

Time scale: 2 ms/div.

Adjusted to 1.2 V - Typical Characteristics

General conditions: Input filter 2 x 22 µF, Output filter 1 x 150 µF

13 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Characteristics Conditions

Output

Unit

min typ max

VOi Output voltage adjusted setting Tref = +25 °C, VInom, IOmax, Radj 23 kΩ1.47 1.5 1.53 V

Output voltage tolerance band IO = 0.01...1.0 x IOmax 1.455 1.545 V

Idling voltage IO = 0 1.48 1.52 V

Line regulation VImin ... VImax, IOmax 11 mV

Load regulation IO = 0.01...1.0 x IOmax, VInom 10 mV

Vtr Load transient

voltage deviation Load step = 0.25 ... 0.75 x IOmax,

dI/dt = 5 A/µs, CO = 150 µF,

VI = 3.3 V

100 mV

ttr Load transient recovery time 60 µs

Tcoeff Temperature coefficient Tref = -30 ... +90 °C, IOmax -0.1 0 +0.1 mV/°C

tsStart-up time From VI connected to VO = 0.9 x VOI,

IO = 0.1 ...1.0 x IOmax, VInom 8.5 ms

trRamp-up time 0.1...0.9 x VO, IO = 0.1 ...1.0 x IOmax, VInom 4 ms

trFall time, VO x 0.1 IO = IOmax, VInom 0.2 ms

trFall time, VO x 0.1 IO = 0 A, VInom 5 s

tRCoff RC shut-down time to VO x 0.1 IO = IOmax, VInom 0.2 ms

tRCon RC start-up time to VO x 0.9 IO = IOmax, VInom 8 ms

tRC RC fall time, VO x 0.1 ... 0.9 IO = 0 A, VInom 5 s

IOOutput current 0 10 A

POmax Max output power At VO = VOnom 15 W

Ilim Current limit threshold Tref < Trefmax 16 20 24 A

VOac Output ripple 20Hz ... 5MHz, IOmax 15 25 mVp-p

ηEfficiency - 50% load IO = 0.5 x IOmax, VI = 5 V 92 %

ηEfficiency - 100% load IO = IOmax, VI = 5 V 88 90.5 %

PdPower Dissipation IO = IOmax, VI = 5 V 1.6 2.1 W

Fo Switching frequency IO = 0 ... 1.0 x IOmax 250 300 350 kHz

Isense Remote sense current 8 mA

IIStatic input current VI = 3.0 V, IO = IOmax, Tref = 25 °C 5.5 A

MTBF Predicted reliability Tref = 40 °C 6 million

hours

Tref = -30 ... +90 °C, VI = 3.0 ...5.5 V unless otherwise specified. Input filter 2 x 22 µF, Output filter 1 x 150 µF

Typ values specified at: Tref = +25 °C and VInom. IOmax = 10 A. Note: +Sense connected to +Out

Adjusted to 1.5 V out - Data

14 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Output Current Derating at 5 V input

Output Characteristic Start-Up

Output voltage vs. load current.

Available load current vs. ambient air temperature and

airflow at Vin = 5 V. See conditions on page 27.

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Start-up at IO = 10 A resistive load at Tref = +25 °C,

Vin = 3.3 V. Start enabled by connecting Vin.

Top trace: output voltage (0.5 V/div.).

Bottom trace: input voltage (2 V/div.).

Time scale: 2 ms/div.

Efficiency Power Dissipation

Adjusted to 1.5V out - Typical Characteristics

Efficiency vs. load current and input voltage at Tref = +25 °C

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Dissipated power vs. load current and input voltage at

Tref = +25 °C

General conditions: Input filter 2 x 22 µF, Output filter 1 x 150 µF

Output Current Derating at 3.3 V input

Available load current vs. ambient air temperature and

airflow at Vin = 3.3 V. See conditions on page 27.

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15 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Turn Off Output Ripple

Transient with 150 µF output capacitor

Output voltage response to load current step-change

(2.5-7.5-2.5 A) at Tref =+25 °C, Vin = 3.3 V. dI/dt = 5A/µs

Top trace: output voltage (ac) (100 mV/div.).

Bottom trace: load current (dc) (10 A/div.)

Time scale: 0.1 ms/div.

Transient with 300 µF output capacitor

Output voltage response to load current step-change

(2.5-7.5-2.5 A) at Tref =+25 °C, Vin = 3.3 V. dI/dt = 5A/µs

Top trace: output voltage (ac) (100 mV/div.).

Bottom trace: load current (dc) (10 A/div.)

Time scale: 0.1 ms/div.

Output voltage ripple (20mV/div.) at Tref=+25 °C, Vin=3.3 V,

IO=10A resistive load.

Band width=5MHz.

Time scale: 2µs / div.

Turn-off at IO=10 A resistive load at Tref=+25 °C,

Vin=3.3 V. Turn-off enabled by disconnecting Vin.

Top trace: output voltage (0.5 V/div.).

Bottom trace: input voltage (2 V/div.).

Time scale: 2 ms/div.

Adjusted to 1.5V out - Typical Characteristics

General conditions: Input filter 2 x 22 µF, Output filter 1 x 150 µF

16 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Tref = –30…+90 °C, VI = 3.0 ... 5.5 V unless otherwise specified. Input filter 2 x 22 µF, Output filter 1 x 150 µF

Typ values specified at: Tref = +25 °C and VInom. IOmax = 10 A. Note: +Sense connected to +Out

Adjusted to 1.8 V out - Data

Characteristics Conditions

Output

Unit

min typ max

VOi Output voltage adjusted setting Tref = +25 °C, VInom, IOmax, Radj 15 kΩ1.764 1.80 1.836 V

Output voltage tolerance band IO = 0.01...1.0 x IOmax 1.746 1.854 V

Idling voltage IO = 0 1.78 1.82 V

Line regulation VImin ... VImax, IOmax 11 mV

Load regulation IO = 0.01...1.0 x IOmax, VInom 10 mV

Vtr Load transient

voltage deviation Load step = 0.25 ... 0.75 x IOmax,

dI/dt = 5 A/µs, CO = 150 µF,

VI = 3.3 V

110 mV

ttr Load transient recovery time 60 µs

Tcoeff Temperature coefficient Tref = -30 ... +90 °C, IOmax -0.1 0 +0.1 mV/°C

tsStart-up time From VI connected to VO = 0.9 x VOI,

IO = 0.1 ...1.0 x IOmax, VInom 8.5 ms

trRamp-up time 0.1...0.9 x VO, IO = 0.1 ...1.0 x IOmax, VInom 4 ms

trFall time, VO x 0.1 IO = IOmax, VInom 0.2 ms

trFall time, VO x 0.1 IO = 0 A, VInom 5 s

tRCoff RC shut-down time to VO x 0.1 IO = IOmax, VInom 0.2 ms

tRCon RC start-up time to VO x 0.9 IO = IOmax, VInom 8 ms

tRC RC fall time, VO x 0.1 ... 0.9 IO = 0 A, VInom 5 s

IOOutput current 0 10 A

POmax Max output power At VO = VOnom 18 W

Ilim Current limit threshold Tref < Trefmax 16 20 24 A

VOac Output ripple 20 Hz ... 5 MHz, IOmax 15 25 mVp-p

ηEfficiency - 50% load IO = 0.5 x IOmax, VI = 5 V 92.4 %

ηEfficiency - 100% load IO = IOmax, VI = 5 V 90 92.1 %

PdPower Dissipation IO = IOmax, VI = 5 V 1.6 2.0 W

Fo Switching frequency IO = 0 ... 1.0 x IOmax 250 300 350 kHz

Isense Remote sense current 8 mA

IIStatic input current VI = 3.0 V, IO = IOmax, Tref = 25 °C 6.5 A

MTBF Predicted reliability Tref = 40 °C 6 million

hours

17 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Efficiency

Output Current Derating at 3.3 V input Output Current Derating at 5 V input

Adjusted to 1.8 V - Typical Characteristics

Output Characteristic Start-Up

Output voltage vs. load current.

Available load current vs. ambient air temperature and

airflow at Vin = 5 V. See conditions on page 27.

Efficiency vs. load current and input voltage at Tref = +25 °C

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Start-up at IO = 10 A resistive load at Tref = +25 °C,

Vin = 3.3 V. Start enabled by connecting Vin.

Top trace: output voltage (0.5 V/div.).

Bottom trace: input voltage (2 V/div.).

Time scale: 2 ms/div.

Available load current vs. ambient air temperature and

airflow at Vin = 3.3 V. See conditions on page 27.

Power Dissipation

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Dissipated power vs. load current and input voltage at

Tref=+25 °C

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General conditions: Input filter 2 x 22 µF, Output filter 1 x 150 µF

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18 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Turn Off Output Ripple

Adjusted to 1.8 V out - Typical Characteristics

Transient with 150 µF output capacitor

Output voltage response to load current step-change

(2.5-7.5-2.5 A) at Tref =+25 °C, Vin = 3.3 V. dI/dt = 5A/µs

Top trace: output voltage (ac) (100 mV/div.).

Bottom trace: load current (dc) (10 A/div.)

Time scale: 0.1 ms/div.

Transient with 300 µF output capacitor

Output voltage response to load current step-change

(2.5-7.5-2.5 A) at Tref =+25 °C, Vin = 3.3 V. dI/dt = 5A/µs

Top trace: output voltage (ac) (100 mV/div.).

Bottom trace: load current (dc) (10 A/div.)

Time scale: 0.1 ms/div.

Output voltage ripple (20mV/div.) at Tref=+25 °C, Vin=3.3 V,

IO=10A resistive load.

Band width=5MHz.

Time scale: 2µs / div.

Turn-off at IO=10 A resistive load at Tref=+25 °C,

Vin=3.3 V. Turn-off enabled by disconnecting Vin.

Top trace: output voltage (0.5 V/div.).

Bottom trace: input voltage (2 V/div.).

Time scale: 2 ms/div.

General conditions: Input filter 2 x 22 µF, Output filter 1 x 150 µF

19 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Characteristics Conditions

Output

Unit

min typ max

VOi Output voltage adjusted setting Tref = +25 °C, VInom, IOmax, Radj 7 kΩ2.45 2.5 2.55 V

Output voltage tolerance band IO = 0.01...1.0 x IOmax 2.425 2.575 V

Idling voltage IO = 0 2.48 2.52 V

Line regulation VImin ... VImax, IOmax 11 mV

Load regulation IO = 0.01...1.0 x IOmax, VInom 10 mV

Vtr Load transient

voltage deviation Load step = 0.25 ... 0.75 x IOmax,

dI/dt = 5 A/µs, CO = 150 µF,

VI = 3.3 V

140 mV

ttr Load transient recovery time 60 µs

Tcoeff Temperature coefficient Tref = -30 ... +90 °C, IOmax -0.1 0 +0.1 mV/°C

tsStart-up time From VI connected to VO = 0.9 x VOI,

IO = 0.1 ...1.0 x IOmax, VInom 8.5 ms

trRamp-up time 0.1...0.9 x VO, IO = 0.1 ...1.0 x IOmax, VInom 4 ms

trFall time, VO x 0.1 IO = IOmax, VInom 0.2 ms

trFall time, VO x 0.1 IO = 0 A, VInom 5 s

tRCoff RC shut-down time to VO x 0.1 IO = IOmax, VInom 0.2 ms

tRCon RC start-up time to VO x 0.9 IO = IOmax, VInom 8 ms

tRC RC fall time, VO x 0.1 ... 0.9 IO = 0 A, VInom 5 s

IOOutput current 0 10 A

POmax Max output power At VO = VOnom 25 W

Ilim Current limit threshold Tref < Trefmax 16 20 24 A

VOac Output ripple 20 Hz ... 5 MHz, IOmax 20 30 mVp-p

ηEfficiency - 50% load IO = 0.5 x IOmax, VI = 5 V 94 %

ηEfficiency - 100% load IO = IOmax, VI = 5 V 92 94 %

PdPower Dissipation IO = IOmax, VI = 5 V 1.6 2.2 W

Fo Switching frequency IO = 0 ... 1.0 x IOmax 250 300 350 kHz

Isense Remote sense current 8 mA

IIStatic input current VI = 3.0 V, IO = IOmax, Tref = 25 °C 8.8 A

MTBF Predicted reliability Tref = 40 °C 6 million

hours

Tref = -30 ... +90 °C, VI = 3.0 ...5.5 V unless otherwise specified. Input filter 2 x 22 µF, Output filter 1 x 150 µF

Typ values specified at: Tref = +25 °C and VInom. IOmax = 10 A. Note: +Sense connected to +Out

Adjusted to 2.5 V out - Data

20 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Output Current Derating at 5 V input

Output Characteristic Start-Up

Output voltage vs. load current.

Available load current vs. ambient air temperature and

airflow at Vin = 5 V. See conditions on page 27.

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Start-up at IO = 10 A resistive load at Tref = +25 °C,

Vin = 3.3 V. Start enabled by connecting Vin.

Top trace: output voltage (1 V/div.).

Bottom trace: input voltage (2 V/div.).

Time scale: 2 ms/div.

Efficiency Power Dissipation

Adjusted to 2.5 V out - Typical Characteristics

Efficiency vs. load current and input voltage at Tref = +25 °C

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Dissipated power vs. load current and input voltage at

Tref = +25 °C

General conditions: Input filter 2 x 22 µF, Output filter 1 x 150 µF

Output Current Derating at 3.3 V input

Available load current vs. ambient air temperature and

airflow at Vin = 3.3 V. See conditions on page 27.

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21 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Turn Off Output Ripple

Transient with 150 µF output capacitor

Output voltage response to load current step-change

(2.5-7.5-2.5 A) at Tref =+25 °C, Vin = 3.3 V. dI/dt = 5A/µs

Top trace: output voltage (ac) (100 mV/div.).

Bottom trace: load current (dc) (10 A/div.)

Time scale: 0.1 ms/div.

Transient with 300 µF output capacitor

Output voltage response to load current step-change

(2.5-7.5-2.5 A) at Tref =+25 °C, Vin = 3.3 V. dI/dt = 5A/µs

Top trace: output voltage (ac) (100 mV/div.).

Bottom trace: load current (dc) (10 A/div.)

Time scale: 0.1 ms/div.

Output voltage ripple (20mV/div.) at Tref=+25 °C, Vin=3.3 V,

IO=10A resistive load.

Band width=5MHz.

Time scale: 2µs / div.

Turn-off at IO=10 A resistive load at Tref=+25 °C,

Vin=3.3 V. Turn-off enabled by disconnecting Vin.

Top trace: output voltage (1 V/div.).

Bottom trace: input voltage (2 V/div.).

Time scale: 2 ms/div.

Adjusted to 2.5 V out - Typical Characteristics

General conditions: Input filter 2 x 22 µF, Output filter 1 x 150 µF

22 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Tref = -30 ... +90 °C, VI = 3.8 ... 5.5 V unless otherwise specified. Input filter 2 x 22 µF, Output filter 1 x 150 µF

Typ values specified at: Tref = +25 °C and VI = 5.0 V. IOmax = 10 A. Note: +Sense connected to +Out

Adjusted to 3.3 V out - Data

Characteristics Conditions

Output

Unit

min typ max

VOi Output voltage adjusted setting Tref = +25 °C, VI > 3.8 V, IOmax, Radj 3.1 kΩ3.234 3.3 3.366 V

Output voltage tolerance band IO = 0.1...1.0 x IOmax 3.201 3.399 V

Idling voltage IO = 0 3.28 3.32 V

Line regulation VI = 5 V ... VImax, IOmax 11 mV

Load regulation IO = 0.01...1.0 x IOmax, VI = 5 V 10 mV

Vtr Load transient

voltage deviation Load step = 0.25 ... 0.75 x IOmax,

dI/dt = 5 A/µs, CO = 150 µF,

VI = 5 V

120 mV

ttr Load transient recovery time 60 µs

Tcoeff Temperature coefficient Tref = -30 ... +90 °C, IOmax -0.1 0 +0.1 mV/°C

tsStart-up time From VI connected to VO = 0.9 x VOadj,

IO = 0.1 ...1.0 x IOmax, VI = 5 V 8.5 ms

trRamp-up time 0.1...0.9 x VO, IO = 0.1 ...1.0 x IOmax,

VI = 5 V 4 ms

trFall time, VO x 0.1 IO = IOmax, VI = 5 V 0.2 ms

trFall time, VO x 0.1 IO = 0 A, VI = 5 V 5 s

tRCoff RC shut-down time to VO x 0.1 IO = IOmax, VI = 5 V 0.2 ms

tRCon RC start-up time to VO x 0.9 IO = IOmax, VI = 5 V 8 ms

tRC RC fall time, VO x 0.1 ... 0.9 IO = 0 A, VI = 5 V 5 s

IOOutput current 0 10 A

POmax Max output power At VO = VOnom 33 W

Ilim Current limit threshold Tref < Trefmax 16 20 24 A

VOac Output ripple 20 Hz ... 5 MHz, IOmax 20 30 mVp-p

ηEfficiency - 50% load IO = 0.5 x IOmax, VI = 5 V 95.7 %

ηEfficiency - 100% load IO = IOmax, VI = 5 V 93 95.4 %

PdPower Dissipation IO = IOmax, VI = 5 V 1.6 2.5 W

Fo Switching frequency IO = 0 ... 1.0 x IOmax 250 300 350 kHz

Isense Remote sense current 8 mA

IIStatic input current VI = 3.8 V, IO = IOmax, Tref = 25 °C 9.2 A

MTBF Predicted reliability Tref = 40 °C 6 million

hours

23 EN/LZT 146 056 R4A © Ericsson Power Modules, March 2007

PMC 4318T WS Datasheet

Output Current Derating at 5 V inputOutput Characteristic

Start-Up

Output voltage vs. load current. Available load current vs. ambient air temperature and

airflow at Vin = 5 V. See conditions on page 27.

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Start-up at IO = 10 A resistive load at Tref = +25 °C,

Vin = 5 V. Start enabled by connecting Vin.

Top trace: output voltage (1 V/div.).

Bottom trace: input voltage (2 V/div.).

Time scale: 2 ms/div.

Efficiency Power Dissipation

Adjusted to 3.3 V out - Typical Characteristics

Efficiency vs. load current and input voltage at Tref = +25 °C

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Dissipated power vs. load current and input voltage at

Tref = +25 °C

General conditions: Input filter 2 x 22 µF, Output filter 1 x 150 µF

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Turn Off

Turn-off at IO=10 A resistive load at Tref=+25 °C,

Vin = 5 V. Turn-off enabled by disconnecting Vin.

Top trace: output voltage (1 V/div.).

Bottom trace: input voltage (2 V/div.).

Time scale: 2 ms/div.

PMC 4318T WS Datasheet

Output Ripple Transient with 150 µF output capacitor

Output voltage response to load current step-change

(2.5-7.5-2.5 A) at Tref =+25 °C, Vin = 5 V. dI/dt = 5A/µs

Top trace: output voltage (ac) (100 mV/div.).

Bottom trace: load current (dc) (10 A/div.)

Time scale: 0.1 ms/div.

Transient with 300 µF output capacitor

Output voltage response to load current step-change

(2.5-7.5-2.5 A) at Tref =+25 °C, Vin = 5 V. dI/dt = 5A/µs

Top trace: output voltage (ac) (100 mV/div.).

Bottom trace: load current (dc) (10 A/div.)

Time scale: 0.1 ms/div.

Output voltage ripple (20mV/div.) at Tref=+25 °C, Vin = 5 V,

IO=10A resistive load.

Band width=5MHz.

Time scale: 2µs / div.

Adjusted to 3.3 V out - Typical Characteristics

General conditions: Input filter 2 x 22 µF, Output filter 1 x 150 µF

PMC 4318T WS Datasheet

EMC Specification

Layout Recommendation

The radiated EMI performance of the DC/DC regulator will be

optimised by including a ground plane in the PCB area under

the DC/DC regulator. This approach will return switching

noise to ground as directly as possible, with improvements

to both emission and susceptibility.

Operating Information

All PMC 4000 Series DC/DC regulators have a positive re-

mote sense pin that can be used to compensate for moder-

ate amounts of resistance in the distribution system and al-

low for voltage regulation at the load or other selected point.

The remote sense line will carry very little current and does

not need a large cross sectional area. However, the sense

line on the PCB should be located close to a ground trace or

ground plane. The remote sense circuitry will compensate for

up to 10% voltage drop between the sense voltage and the

voltage at the output pins from VOnom. If the remote sense is

not needed the sense pin should be left open.

Remote Sense

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RC Regulator

condition min typ max Unit

Low level

referenced to GND OFF -0.3 0.3 V

Open ON 1.7 5 V

Remote Control (RC)

The RC pin may be used to turn on or turn off the regulator

using a suitable open collector function.

Turn off is achieved by connecting the RC pin to ground.

The regulator will run in normal operation when the RC pin is

left open.

+IN

Module

+IN

GND

PMC 4318T WS Datasheet

Operating Information

Output Voltage Adjust (Vadj)

The output voltage can be set by means of an external

resistor, connected to the Vadj pin. Nominal output voltage

0.75 V is set by leaving the Vadj pin open. Adjustment can

only be made to increase the output voltage setting.

To increase:

Connect a resistor between (Vadj) and (Gnd). The output

voltage increases with decreasing resistor value as shown

in the table below. Note that the maximum output voltage

3.63 V may not be exceeded.

Rext up (kohm) = (21.007 / (VO - 0.75225)) - 5.1

Circuit configuration for output voltage adjust

Increase

+Out

GND

Vadj Load

Radj

Sense

Output Voltage (V) Resistor (ohm)

0.75 Open

1.0 79.691 k

1.2 41.817 k

1.5 22.990 k

1.8 14.949 k

2.5 6.919 k

3.3 3.145 k

Current Limit Protection

The PMC 4000 Series DC/DC regulators include current

limiting circuitry that allows them to withstand continuous

overloads or short circuit conditions on the output. The cur-

rent limit is of hick-up mode type.

The regulator will resume normal operation after removal

of the overload. The load distribution system should be

designed to carry the maximum output short circuit current

specified.

Input And Output Impedance

The impedance of both the power source and the load will

interact with the impedance of the DC/DC regulator. It is

most important to have a low characteristic impedance,

both at the input and output, as the regulators have a low

energy storage capability. Use capacitors across the input if

the source inductance is greater than 4.7 µH. Suitable input

capacitors are 22 µF - 220 µF low ESR ceramics.

Maximum Capacitive Load

When powering loads with significant dynamic current

requirements, the voltage regulation at the load can be

improved by addition of decoupling capacitance at the load.

The most effective technique is to locate low ESR ceramic

capacitors as close to the load as possible, using several

capacitors to lower the total ESR. These ceramic capacitors

will handle short duration high-frequency components

of dynamic load changes. In addition, higher values of

capacitors (electrolytic capacitors) should be used to handle

the mid-frequency components. It is equally important

to use good design practice when configuring the DC

distribution system.

Low resistance and low inductance PCB layouts and

cabling should be used. Remember that when using remote

sensing, all resistance (including the ESR), inductance and

capacitance of the distribution system is within the feedback

loop of the regulator. This can affect on the regulators

compensation and the resulting stability and dynamic

response performance.

Very low ESR and high capacitance must be used with

care. A “rule of thumb” is that the total capacitance must

never exceed typically 500-700 µF if only low ESR (< 2 mΩ)

ceramic capacitors are used. If more capacitance is needed,

a combination of low ESR type and electrolytic capacitors

should be used, otherwise the stability will be affected.

The PMC 4000 series regulator can accept up to 5 mF of

capacitive load on the output at full load. This gives <500

µF/A of IO. When using that large capacitance it is important

to consider the selection of output capacitors; the resulting

behavior is a combination of the amount of capacitance and

ESR.

Minimum Required External Capacitors

External input capacitors are required to increase the

lifetime of the internal capacitors and to further reduce the

input ripple. A minimum of 44 µF external input capacitanceµF external input capacitanceF external input capacitance

with low ESR should be added.

A minimum of 150 µF external output capacitance , lowµF external output capacitance , lowF external output capacitance , low

ESR, should be added for the converter to operate properly

at full load.

PMC 4318T WS Datasheet

Operating Information

A combination of low ESR and output capacitance

exceeding 5 mF can cause the regulator into over current

protection mode (hick-up) due to high start up current. The

output filter must therefore be designed without exceeding

the above stated capacitance levels if the ESR is lower than

30-40 mΩ.

Parallel Operation

Input Undervoltage Lockout

The PMC 4000 Series DC/DC regulators are equipped with a

lockout function for low input voltage.When the input voltage

is below the undervoltage lockout limit of the regulator it will

shut off. When the input voltage increases above the lockout

level the regulator will turn on.

The PMC 4000 Series DC/DC regulators can be connected

in parallel with a common input. Paralleling is accomplished

by connecting the output voltage pins directly and using

a load sharing device on the input. Layout considerations

should be made to avoid load imbalance. For more details

on paralleling, please consult your local applications

support.

PMC 4318T WS Datasheet

Thermal Considerations

General

The PMC 4000 Series DC/DC regulators are designed

to operate in a variety of thermal environments, however

sufficient cooling should be provided to help ensure reliable

operation. Heat is removed by conduction, convection and

radiation to the surrounding environment. Increased airflow

enhances the heat transfer via convection.

Proper cooling can be verified by measuring the

temperature at the reference point (Tref).

Calculation of ambient temperature

By using the thermal resistance the maximum allowed

ambient temperature can be calculated.

A. The powerloss is calculated by using the formula

((1/η) - 1) × output power = power losses.

η = efficiency of regulator. Example: 95% = 0.95

B. Find the value of the thermal resistance Rth Tref-A in the dia-

gram by using the airflow speed at the module. Take the ther-

mal resistance × powerloss to get the temperature increase.

Thermal resistance vs. airspeed measured at the regulator.

C. Max allowed calculated ambient temperature is:

Max Tref of DC/DC regulator - temperature increase.

Example: 1.8 V output at 1m/s, full load, 3.3 V in:

B. 1.67 W × 9 °C/W = 15 °C

C. 115 °C - 15 °C = max ambient temperature is 100 °C

The real temperature will be dependent on several factors,

like PCB size and type, direction of airflow, air turbulence

etc. It is recommended to verify the temperature by testing.

A. ((1/0.915) - 1) × 18 W = 1.67 W

Tref

The PMC 4000 thermal testing is performed with the

product mounted on an FR4 board 254 × 254 mm with 8× 254 mm with 8 254 mm with 8

layers of

35 µm copper.

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AIRFLOW

(max 115 °C)

PMC 4318T WS Datasheet

The PMC series DC/DC regulators are intended for reflow soldering

processes. Extra precautions must be taken when reflow soldering

the module. Neglecting the soldering information given below

may result in permanent damage or significant degradation of the

power module performance. No responsibility is assumed if these

recommendations are not strictly followed.

The module can be reflow soldered using vapour phase reflow (VPR)

or forced convection reflow.

To ensure proper soldering of the regulators the temperature should

be monitored on interconnection pin GND. The interconnection

GND is considered as representative due to the heavy copper path

characterisation. A thermocouple can be attached to the pin GND

by means of a suitable adhesive or heat conductive paste, see the

mechanical data on page 4.

The reflow profile should be optimised to avoid solder paste drying

and overheating of the module. Most important is to ensure that the

interconnection pins on the coldest aera reach sufficient soldering

temperature for sufficiently long time. A sufficiently extended soak

time is recommended to ensure an even temperature throughout

the PCB, for both small and large components. To reduce the risk of

overheating the power module, it is also recommended to minimise

the time in reflow as much as possible.

For lead free solder processes (solder melting point 217°C),

the PMC series is qualified for MSL 1 according to JEDEC standard

“J-STD-020c”. During reflow, the module temperature must not

exceed +245 °C at any time.

Soldering Information

For conventional Sn-Pb solder processes (solder melting point

179°C -183°C), The PMC series is qualified for MSL 1 according

to JEDEC standard “J-STD-020c”. During reflow, the module

temperature must not exceed +225 °C at any time.

070 140 210 280 350

100

150

200

250

300

[°C]

Time

reflow ramp-up

cooling

zone

preheat

max 3°/s

soak zone

(150°C-200°C)

60-180s

reflow

zone

max pin temperature

@ 225°C (Low temp solder)

@ 245°C (High temp solder)

(solid line)-High temperature solder

(dashed line)-Low temperature solder

Ramp up, ramp-down rate

Pre-heat Soak zone Reflow zone Cooling

max 3˚C/s max 0.5˚C/s max 3˚C/s max 4˚C/s

Temperature interval, time

Soak zone Reflow zone

130-170˚C, 60-120 s Above 183˚C, 30-80 s

Peak temperature, time

Reflow zone

210-225˚C, 10-30 s

Low temperature solder - reflow profile

Ramp up, ramp-down rate

Pre-heat Soak zone Reflow zone Cooling

max 3˚C/s max 0.5˚C/s max 3˚C/s max 4˚C/s

Temperature interval, time

Soak zone Reflow zone

150-200˚C, 60-180 s Above 220˚C, 30-80 s

Peak temperature, time

Reflow zone

235-245˚C, 10-30 s

High temperature solders - Reflow profile

Pin temperatures, graph of the 4-zones of reflow soldering.

PMC 4318T WS Datasheet

Reliability

The Mean Time Between Failure (MTBF) of the PMC 4000

series DC/DC regulator family is calculated to be greater

than 6 million hours at full output power and a reference

temperature of +40 °C using TelCordia SR 332.

The PMC 4000 series regulators are delivered in antistatic

tape & reel (EIA standards 481-2).

Tape & reel specification:

Material: Conductive

Tape width: 44 mm [1.73 in.]

Tape pitch: 24 mm [0.95 in.]

Total pocket height: 9.1 mm [0.36 in.]

Reel diameter: 330 mm [13 in.]

Reel capacity: 200 pieces

Full reel weight: typ. 2.0 kg

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Delivery Package Information

Compatibility with RoHS requirements

The products are compatible with the relevant clauses

and requirements of the RoHS directive 2002/95/EC and

have a maximum concentration value of 0.1% by weight

in homogeneous materials for lead, mercury, hexavalent

chromium, PBB and PBDE and of 0.01% by weight in

homogeneous materials for cadmium.

Exemptions in the RoHS directive utilized in Ericsson Power

Modules products include:

• Lead in high melting temperature type solder (used to solder

the die in semiconductor packages)

• Lead in glass of electronics components and in electronic

ceramic parts (e.g. fill material in chip resistors)

• Lead as an alloying element in copper alloy containing up to

4% lead by weight (used in connection pins made of Brass)

PMC 4318T WS Datasheet

Sales Offices and Contact Information

Company Headquarters

Ericsson Power Modules AB

LM Ericssons väg 30

SE-126 25 Stockholm

Sweden

Phone: +46-8-568-69620

Fax: +46-8-568-69599

China

Ericsson Simtek Electronics Co.

33 Fuhua Road

Jiading District

Shanghai 201 818

China

Phone: +86-21-5990-3258

Fax: +86-21-5990-0188

North and South America

Ericsson Inc. Power Modules

6300 Legacy Dr.

Plano, TX 75024

USA

Phone: +1-972-583-5254

+1-972-583-6910

Fax: +1-972-583-7839

Hong Kong (Asia Pacific)

Ericsson Ltd.

12/F. Devon House

979 King’s Road

Quarry Bay

Hong Kong

Phone: +852-2590-2453

Fax: +852-2590-7152

Italy, Spain (Mediterranean)

Ericsson Power Modules AB

Via Cadorna 71

20090 Vimodrone (MI)

Italy

Phone: +39-02-265-946-07

Fax: +39-02-265-946-69

All other countries

Contact Company Headquarters

or visit our website:

www.ericsson.com/powermodules

Information given in this data sheet is believed to be accurate and reliable.

No responsibility is assumed for the consequences of its use nor for any infringement

of patents or other rights of third parties which may result from its use.

No license is granted by implication or otherwise under any patent or patent rights of

Ericsson Power Modules. These products are sold only according to

Ericsson Power Modules’ general conditions of sale, unless otherwise confirmed in

writing. Specifications subject to change without notice.

Germany, Austria

Ericsson Power Modules AB

Mühlhauser Weg 18

85737 Ismaning

Germany

Phone: +49-89-9500-6905

Fax: +49-89-9500-6911

Japan

Ericsson Power Modules AB

Kimura Daini Building, 3 FL.

3-29-7 Minami-Oomachi, Shinagawa-ka

Tokyo 140-0013

Japan

Phone: +81-3-5733-5107

Fax: +81-3-5753-5162