DC/DC regulators
Input 4.5 - 5.5V
Output Current 12A
Key Features
• Surface mountable
• Low profi le, max 8.5mm (0.33 in)
• High effi ciency
• Low weight
• Designed for Environment, DfE
• Lead-free / Bromine-free
• Robust design
PMA 5000 Series
E
The PMA series of DC/DC regulators (POL) are
intended to be used as local distributed power sources
in distributed power architecture level 4. The PMA
series use a ceramic substrate with fine-pitch compo-
nents technology and a high degree of silicon integra-
tion. Together with the electrical design using low
Rds-On MOSFET, this provides excellent thermal
management, high reliability and high efficiency. The
high efficiency makes it possible to operate over a
wide temperature range, without adding any external
heat dissipator. At forced convection cooling >1 m/s
(200 lfm), the PMA typically delivers full power up to
+80 °C ambient temperature.
The high reliability and the low profile of the PMA
series makes them particularly suited for the commu-
nications equipment of today and tomorrow and ap-
plications with board spacing down to 15 mm (0.6 in).
The flat case top enables pick-and-place handling and
provides a surface for attachment to cooling surfaces in
areas with limited air flow.
These products are manufactured using the most
advanced technologies and materials to comply with
environmental requirements. Designed to meet high
reliability requirements of systems manufacturers, the
PMA responds to world-class specifications.
Ericsson Power Modules is an ISO 9001/14001 certi-
fied supplier.
Datasheet
2PMA 5000 Series Datasheet EN/LZT 146 034 R1B ©Ericsson Power Modules, November 2003
Characteristics Conditions min typ max Unit
VIInput voltage range 4.5 5.0 5.5 Vdc
VIoff Turn-off input voltage Ramping from higher
voltage 4.0 Vdc
VIon Turn-on input voltage Ramping from lower
voltage 4.3 Vdc
CIInput capacitance 194 µF
PIi Input idling power Io= 0 550 mW
PRC
Input stand-by power
(RC active) Non operation 30 mW
VIac Input ripple 20Hz...5MHz, Iomax 200
1) mV
Characteristics min max Unit
TCMaximum Operating Case Temperature -45 +110 ˚C
TSStorage temperature -55 +125 ˚C
VIInput voltage -0.3 +6.0 Vdc
Input
Note:
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 unspecifi ed manner.
Absolute Maximum Ratings
Characteristics
Random Vibration IEC 68-2-34Ed
Frequency
Acceleration density
10 ... 500 Hz
0.5 g2/Hz
Vibration
(Sinusoidal) IEC 68-2-6 Fc
Frequency range
Acceleration amplitude
Number of cycles
10 ... 500 Hz
10 g or displacement
amplitude 0.75 mm
10 in each axis
Mechanical shock
(half sinus) IEC 68-2-27 Ea
Peak acceleration
Duration
200 g
3 ms
Temperature
cycling IEC 68-2-14 Na
Temperature
Number of cycles
-40 ... +125 ˚C
500
Accelerated damp
heat
IEC 68-2-3 Ca
with bias
Temperature
Humidity
Duration
+85 ˚C
85 % RH
1000 hours
Solderability IEC 68-2-54
Solde immersion depth
Time for onset of wetting
Wetting force
2 mm
< 2.5 s
> 200 mN/m
Resistance to
cleaning solvents
Moulded package
Laser marking Fluid All commercially avail-
able
Cold (in operation) IEC 68-2-1, test AaTemperature -45 ˚C
Storage IEC 68-2-2 BaTemperature
Duration
+125 ˚C
1000 h
Environmental Characteristics
Safety
The PMA 5000 series DC/DC regulators
are designed in accordance with safety
standards IEC/EN/UL 60 950, Safety of
Information Technology Equipment.
The PMA 5000 series DC/DC regulators
are UL 60 950 recognized and certifi ed in
accordance with EN 60 950.
The DC/DC regulator should be installed
in the end-use equipment, in accordance
with the requirements of the ultimate
application. The input source must be
isolated by minimum Reinforced or
Double insulation from the primary
circuit in accordance with IEC/EN/UL
60 950. If the input voltage to the DC/
DC regulator is SELV (Safety Extra Low
Voltage) then the output remains SELV
under normal and abnormal operating
conditions.
It is recommended that a slow blow fuse
with a rating of 25A be used at the input
of each DC/DC regulator. If a fault occurs
in the regulator that imposes a short
circuit on the input source, this fuse will
provide the following functions:
• Isolate the faulty DC/DC regulator
from the input power source 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 fl ammability rating for all
construction parts of the DC/DC
regulator meets UL 94V-0.
TC = -30˚C...+90˚C, VI = 4.5...5.5V unless otherwise specifi ed
Typ values specifi ed at: TC = +25˚C, VInom. VInom = 5.0V, Iomax = 12A
1) Measured with L = 1.6 µH and 10 µF at the input.
3
PMA 5000 Series Datasheet EN/LZT 146 034 R1B ©Ericsson Power Modules, November 2003
Connections Fundamental Circuit Diagram
Weight
PMA 5000 SF 12g
Case
Material: Semiconductor grade epoxy.
Coeffi cient of thermal expansion (CTE)
is typ. 10 ppm/˚C
Mechanical Data
Pin Designation Function
1-2 + Out Output voltage
3-4 Gnd Ground
5-6 + In Input voltage
7 Do not connect Reserved for future function
8 Do not connect Reserved for future function
9 Do not connect Reserved for future function
10 RC Remote control, To turn-on and turn-
off the regulator
11 Select Select pin for pos/neg logic
12 Vadj Output voltage adjust
13 +Sense Remote sensing
14 NC Not connected
Tolerances unless specified
±0,25 [±0.01]
Pin true position within
0,25 [0.01] with reference
to package center.
Coplanarity 0,1 [0.004] max
Standoff 0,3 ±0,1 [0.012 ±0.004]
Lead thickness 0,3 [0.012]
E
Recommended layout pattern
(component side footprint)
( 2,5 [0.1] )
30,4 [1.20]
28,7 [1.13]
18,9 [0.75]
17,2 [0.68]
20 [0.79]
35,2 ±0,5 [1.39 ±0.02]
1
1,5 [0.059] (6x)
2,1 [0.083] (6x)
8,35 ±0,1
[0.334 ±0.004]
1,8 [0.071]
0,7 [0.027] (4x)
1,2 [0.047] (8x)
1 [0.039] (7x)
3°
7°
12,3 [0.484]
2,8 [0.110] (4x)
2,2 [0.087] (7x)
7,7 [0.303]
7,55 [0.297]
2 [0.079] (6x)
32,5 [1.28]
3,5 [0.138] (14x)
1,7 [0.067] (8x)
1
dimensions in mm [in]
Pins
Material: Copper
Plating: fi rst plating Nickel (Ni)
second plating (outer) Palladium (Pd)
GND
GND
IN OUT
+SENSE
Vadj
PWM
controller
Ref
GND
Error
amplifier
RC
RC Sel GND
RC
Block
4PMA 5000 Series Datasheet EN/LZT 146 034 R1B ©Ericsson Power Modules, November 2003
Characteristics Conditions
Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy TC = +25°C, VInom, IOmax 2.45 2.50 2.55 V
Output adjust range TC = +25°C, VInom, IOmax 2.00 2.75 V
VO
Output voltage tolerance band IO = 0.1...1.0 x IOmax, VI = 4.5...5.5V 2.425 2.575 V
Idling voltage IO = 0 2.43 2.57 V
Line regulation VImin ... VImax, IOmax 2 mV
Load regulation IO = 0.01...1.0 x IOmax, VInom 3 mV
Vtr Load transient
voltage deviation Load step = 0.25 ... 0.75 x IOmax
dI/dt = 5A/µs
85 mV
ttr Load transient recovery time 9µs
Tcoeff Temperature coeffi cient TC = 40 ... 90°C, IOmax -0.1 0 +0.1 mV/°C
trRamp-up time 0.1...0.9 x VO, IO = 0.1 ...1.0 x IOmax, VInom 5.5 ms
tsStart-up time From VI connected to VO = 0.9 x VOI,
IO = 0.1 ...1.0 x IOmax, VInom 7.5 ms
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 6 ms
IOOutput current 0 12 A
POmax Max output power At VO = VOnom 30 W
Ilim Current limit threshold TC < TCmax 15 24 30 A
VOac Output ripple 20Hz ... 5MHz, IOmax 28 50 mVp-p
TC = –30…+90°C, VI = 4.5...5.5V unless otherwise specifi ed.
Typ values specifi ed at: TC = +25°C and VInom. VInom = 5.0V, IOmax = 12A. Note: +Sense must be connected to +Out
PMA 5319 Output
Miscellaneous
Characteristics Conditions min typ max Unit
ηEffi ciency - 50% load IO = 0.5 x IOmax 93 %
ηEffi ciency - 100% load IO = IOmax 89 91 %
PdPower Dissipation IO = IOmax 3.0 3.7 W
Fo Switching frequency IO = 0 ... 1.0 x IOmax 250 300 340 kHz
Isense Remote sense current 8mA
IIStatic input current VI = 4.5 V, IO = IOmax, TC = 25°C 7.4 A
MTBF Predicted reliability TC = 40°C12
million
hours
TC = –30…+90°C, VI = 4.5...5.5V unless otherwise specifi ed.
Typ values specifi ed at: TC = +25°C and VInom. VInom = 5.0V, IOmax = 12A. Note: +Sense must be connected to +Out
5
PMA 5000 Series Datasheet EN/LZT 146 034 R1B ©Ericsson Power Modules, November 2003
Effi ciency
Output Characteristic
Output Current Derating
Power Dissipation
PMA 5319 Typical Characteristics
Start-Up Turn-Off
Start-up at IO=12A resistive load at TC=+25 °C,
Vin=5.0 V. Start enabled by connecting Vin.
Top trace: input voltage (2 V/div.).
Bottom trace: output voltage (1 V/div.).
Time scale: 5 ms/div.
Output voltage vs. load current at TC=+25 °C, Vin=5.0 V.
Available load current vs. ambient air temperature and
airfl ow at Vin=5.0 V. See conditions on page 12.
Effi ciency vs. load current and input voltage at TC=+25 °C
03691215
70
75
80
85
90
95
[A]
[%]
4.5 V
5.0 V
5.5 V
020
40 60 80 100
0
2
4
6
8
10
12
14
[°C]
[A]
3.0 m/s (600 lfm)
1.5 m/s (300 lfm)
1.0 m/s (200 lfm)
0.5 m/s (100 lfm)
Nat. Conv.
0369
12 15
2.40
2.45
2.50
2.55
2.60
[A]
[V]
03691215
0
1
2
3
4
[A]
[W]
4.5 V
5.0 V
5.5 V
Dissipated power vs. load current and input voltage at
TC=+25 °C
Turn-off at IO=12A resistive load at TC=+25 °C,
Vin=5.0 V. Turn-off enabled by disconnecting Vin.
Top trace: input voltage (2 V/div.).
Bottom trace: output voltage (0.5 V/div.).
Time scale: 0.5 ms/div.
6PMA 5000 Series Datasheet EN/LZT 146 034 R1B ©Ericsson Power Modules, November 2003
Output Ripple Transient
PMA 5319 Typical Characteristics
Output voltage ripple (20mV/div.) at TC=+25 °C, Vin=5.0 V,
IO=12A resistive load.
Band width=5MHz.
Time scale: 2µs / div.
Output voltage response to load current step-change
(3-9-3 A) at TC=+25 °C, Vin=5.0 V. dI/dt = 5A/µs
Top trace: output voltage (ac) (100mV/div.).
Bottom trace: load current (dc) (100mV/div.)
Time scale: 0.1 ms/div.
Output voltage vs. Output voltage adjust
resistor value.
18 15 22 33 47 68 100 150 220 470 1000
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
[kΩ]
[V]
VOincrease
VOdecrease
Output Voltage Adjust
Output Voltage Adjust
The resistor value for an adjusted output voltage is
calculated by using the following formulas:
Output Voltage Adjust Upwards, Increase:
Radj= 3.767/(VO-2.5)-1 [kΩ]
Output Voltage Adjust Downwards, Decrease:
Radj= (2.212(VO-0.8))/(0.8-(0.469(VO-0.8)))-1 [kΩ]
E.g. Increase to VO = 2.613 V
3.767/(2.613-2.5)-1 = 33 [kΩ]
E.g. Decrease to VO = 2.295 V
(2.212(2.295-0.8))/(0.8-(0.469(2.295-0.8)))-1 = 33 [kΩ]
7
PMA 5000 Series Datasheet EN/LZT 146 034 R1B ©Ericsson Power Modules, November 2003
Characteristics Conditions
Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy TC = +25°C, VInom, IOmax 3.235 3.30 3.365 V
Output adjust range TC = +25°C, VInom, IOmax 2.64 3.63 V
VO
Output voltage tolerance band IO = 0.1...1.0 x IOmax, VI = 4.5...5.5V 3.20 3.40 V
Idling voltage IO = 0 3.22 3.38 V
Line regulation VImin ... VImax, IOmax 7 mV
Load regulation IO = 0.01...1.0 x IOmax, VInom 3 mV
Vtr Load transient
voltage deviation Load step = 0.25 ... 0.75 x IOmax,
dI/dt = 5A/µs
100 mV
ttr Load transient recovery time 7µs
Tcoeff Temperature coeffi cient TC = 40 ... 90°C, IOmax -0.1 0 +0.1 mV/°C
trRamp-up time 0.1...0.9 x VO, IO = 0.1 ...1.0 x IOmax, VInom 5.8 ms
tsStart-up time From VI connected to VO = 0.9 x VOI,
IO = 0.1 ...1.0 x IOmax, VInom 8.0 ms
tRCoff RC shut-down time to VO x 0.1 IO = IOmax, VInom 0.3 ms
tRCon RC start-up time to VO x 0.9 IO = IOmax, VInom 6 ms
IOOutput current 0 12 A
POmax Max output power At VO = VOnom 39.6 W
Ilim Current limit threshold TC < TCmax 15 22 30 A
VOac Output ripple 20Hz ... 5MHz, IOmax 35 50 mVp-p
TC = –30…+90°C, VI = 4.5...5.5V unless otherwise specifi ed.
Typ values specifi ed at: TC = +25°C and VInom. VInom = 5.0V, IOmax = 12A. Note: +Sense must be connected to +Out
PMA 5310 Output
Miscellaneous
Characteristics Conditions min typ max Unit
ηEffi ciency - 50% load IO = 0.5 x IOmax 94.5 %
ηEffi ciency - 100% load IO = IOmax 91 92.5 %
PdPower Dissipation IO = IOmax 3.1 4.0 W
Fo Switching frequency IO = 0 ... 1.0 x IOmax 250 300 340 kHz
Isense Remote sense current 8mA
IIStatic input current VI = 4.5 V, IO = IOmax, TC = 25°C 9.5 A
MTBF Predicted reliability TC = 40°C12
million
hours
TC = –30…+90°C, VI = 4.5...5.5V unless otherwise specifi ed.
Typ values specifi ed at: TC = +25°C and VInom. VInom = 5.0V, IOmax = 12A. Note: +Sense must be connected to +Out
8PMA 5000 Series Datasheet EN/LZT 146 034 R1B ©Ericsson Power Modules, November 2003
Effi ciency
Output Characteristic
Output Current Derating
Power Dissipation
PMA 5310 Typical Characteristics
Start-Up Turn-Off
Start-up at IO=12A resistive load at TC=+25 °C,
Vin=5.0 V. Start enabled by connecting Vin.
Top trace: input voltage (2 V/div.).
Bottom trace: output voltage (1 V/div.).
Time scale: 2 ms/div.
Output voltage vs. load current at TC=+25 °C, Vin=5.0 V.
Available load current vs. ambient air temperature and
airfl ow at Vin=5.0 V. See conditions on page 12.
Effi ciency vs. load current and input voltage at TC=+25 °C
03691215
70
75
80
85
90
95
100
[A]
[%]
4.5 V
5.0 V
5.5 V
020
40 60 80 100
0
2
4
6
8
10
12
14
[°C]
[A]
3.0 m/s (600 lfm)
1.5 m/s (300 lfm)
1.0 m/s (200 lfm)
0.5 m/s (100 lfm)
Nat. Conv.
0 3 6 9 12 15
3.0
3.1
3.2
3.3
3.4
3.5
3.6
[A]
[V]
0 3 6 9 12 15
0
1
2
3
4
[A]
[W]
4.5 V
5.0 V
5.5 V
Dissipated power vs. load current and input voltage at
TC=+25 °C
Turn-off at IO=12A resistive load at TC=+25 °C,
Vin=5.0 V. Turn-off enabled by disconnecting Vin.
Top trace: input voltage (2 V/div.).
Bottom trace: output voltage (1 V/div.).
Time scale: 1 ms/div.
9
PMA 5000 Series Datasheet EN/LZT 146 034 R1B ©Ericsson Power Modules, November 2003
Output Ripple Transient
PMA 5310 Typical Characteristics
Output voltage ripple (20mV/div.) at TC=+25 °C, Vin=5.0 V,
IO=12A resistive load.
Band width=5MHz.
Time scale: 2µs / div.
Output voltage response to load current step-change
(3-9-3 A) at TC=+25 °C, Vin=5.0 V. dI/dt 0 5A/µs
Top trace: output voltage (ac) (100mV/div.).
Bottom trace: load current (dc) (100mV/div.).
Time scale: 0.1 ms/div.
Output voltage vs. Output voltage adjust
resistor value.
10 15 22 33 47 68 100 150 220 470 1000
3.7
3.5
3.3
3.1
2.9
2.7
2.5
[kΩ]
[V]
VOincrease
VOdecrease
Output Voltage Adjust
Output Voltage Adjust
The resistor value for an adjusted output voltage is
calculated by using the following formulas:
Output Voltage Adjust Upwards, Increase:
Radj= 3.767/(VO-3.3)-1 [kΩ]
Output Voltage Adjust Downwards, Decrease:
Radj= (1.504(VO-0.8))/(0.8-(0.319(VO-0.8)))-1 [kΩ]
E.g. Increase to VO = 3.406 V
3.767/(3.406-3.3)-1 = 39 [kΩ]
E.g. Decrease to VO = 3.047 V
(1.504(3.047-0.8))/(0.8-(0.319(3.047-0.8)))-1 = 39 [kΩ]
10 PMA 5000 Series Datasheet EN/LZT 146 034 R1B ©Ericsson Power Modules, November 2003
EMC Specifi cation
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
Remote Control (RC)
The PMA 5000 Series DC/DC regulators have remote control
function, with both negative and positive logic options. The
RC function is CMOS open drain compatible. Maximum sink
current is 1mA. The (RC) and (Select) pins have identical
functions meaning that the functions may be inverted. If either
one of the pins is shorted to ground the regulator is turned
off. If both pins are are shorted to ground or both pins are
disconnected the regulator is turned on.
Positive logic:
To choose positive logic, leave the Select pin open = 1.
Negative logic:
To choose negative logic, connect the Select pin to GND = 0.
With the RC pin, i.e. with a suitable open collector function,
the ON/OFF condition of the regulator may be controlled.
All PMA 5000 Series DC/DC regulators have a positive remote
sense pin that can be used to compensate for moderate amounts
of resistance in the distribution system and allow 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 connected to +Out.
Remote Sense
RC Select Regulator condition
00ON
1 0 OFF
0 1 OFF
11 ON
0= Defi ned as low voltage level, 0-0.3V
1= Defi ned as high voltage level, approx. 4V, (internal level)
11
PMA 5000 Series Datasheet EN/LZT 146 034 R1B ©Ericsson Power Modules, November 2003
Over Temperature Protection (OTP)
The PMA 5000 Series DC/DC regulators are protected from
thermal overload by an internal over temperature shutdown
circuit. When the case temperature (center of case ) exceeds
140 ºC the regulator will shut down immediately.
The regulator will return to normal operation when the over
temperature degrades.
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 4.7µH. Suitable input capacitors are
47µF-220µF low ESR ceramics.
Max output capacitance is 5000µF. The use of low ESR
capacitors is important and should be <15 mΩ.
Parallel Operation
The PMA 5000 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 and it is recommended not to use
more power than that of each individual regulator. For more
details on paralleling, please consult the separate Application
Note AN202A.
Maximum Capacitive Load
When powering loads with signifi cant 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 should
be used to handle the mid-frequency components. It is equally
important to use good design practise when confi guring the
DC distribution system.
Low resistance and low inductance PCB layouts and cabling
should be used. Remember that when using remote sensing,
all resistance, 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. The PMA 5000
series regulator can accept up to 5mF of capacitive load on the
output at full load. This gives <500µF/A of IO.
Current Limit Protection
The PMA 5000 Series DC/DC regulators include current
limiting circuitry that allows them to withstand continuous
overloads or short circuit conditions on the output. The current
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.
Operating Information
Output Voltage Adjust (Vadj)
All PMA 5000 Series DC/DC regulators have an Output
Voltage adjust pin (Vadj). This pin can be used to adjust the
output voltage above or below Output voltage initial setting.
Note that at increased output voltages the maximum power
rating of the regulator remains the same, and the output
current capability will decrease correspondingly. To decrease
the output voltage the resistor should be connected between
Vadj pin and the Sense pin. To increase the voltage the resistor
should be connected between Vadj pin and the GND pin. The
resistor value of the Output voltage adjust function is according
to information given under the output section.
Circuit confi guration for output voltage adjust
+Out
GND
Vadj
Load
Radj
Decrease Increase
+Out
GND
Vadj Load
Radj
Sense
12 PMA 5000 Series Datasheet EN/LZT 146 034 R1B ©Ericsson Power Modules, November 2003
Thermal Considerations
General
The PMA 5000 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. The available load
current vs. ambient air temperature and airflow at Vin=5.0 V
for each model is according to the information given under the
output section.
Test conditions:
The test is done in a wind tunnel with a cross section of
305x305 mm, the DC/DC regulator horisontally mounted on
a 2 layer PCB with a size of 230x160 mm. Proper cooling can
be verified by measuring the temperature on top of the case.
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 = effi ciency of regulator. Example: 95% = 0.95
B. Find the value of the thermal resistance Rth C-A in the dia-
gram by using the airfl ow speed at the module. Take the ther-
mal resistance × powerloss to get the temperature increase.
0.0 0.5 1.0 1.5 2.0 2.5 3.0
5
10
15
20
[m/s]
[°C/W]
Rth C-A
Thermal resistance vs. airspeed measured at the regulator.
C. Max allowed calculated ambient temperature is:
Max TC of DC/DC regulator - temperature increase.
Example: PMA 5319 at 1m/s:
B. 3.33W × 11.7°C/W = 39.0°C
C.110°C - 39°C = max ambient temperature is 71°C
The real temperature will be dependent on several factors,
like PCB size and type, direction of airfl ow, air turbulence
etc. It is recommended to verify the temperature by testing.
A. ((1/0.90) - 1) × 30W = 3.33W
1
2
3
4
5
6
Top view
14
13
12
11
10
9
8
7
Reference area TC
TCmax = 110°C
13
PMA 5000 Series Datasheet EN/LZT 146 034 R1B ©Ericsson Power Modules, November 2003
Miscellaneous
The PMA 5000 series DC/DC regulators are intended for
reflow soldering processes. Extra precautions must be taken
when reflow-soldering the module. Neglecting the soldering
information provided may result in permanent damage or
significant degradation of the regulator performance. No
responsibility is assumed if these recommendations are not
strictly followed.
The regulator may be reflow soldered using vapour phase
reflow (VPR) or forced convection reflow processes. The
high thermal mass of the component and its effect on the
temperature differences (∆T) over a PCB means that particular
attention should be paid to other temperature sensitive
components.
For successful soldering of the PMA 5000 series DC/DC
regulators, both pin temperature and case temperature must be
monitored:
• Minimum temperature of the pins:
to ensure reliable solder joints
• Maximum temperature of the regulator case:
to avoid overheating
Soldering Information
Minimum temperature:
Most important is to ensure that the pins on the coolest side
reach suffi cient soldering temperature for a suffi cient time.
Therefore, the pin temperature measurements should be done
on both sides of the module, preferrably on the middle pins
(3/4 and 11/12).
The pins of the module are palladium plated. In order to
guarantee a reliable solder joint, a pin temperature (TP) in
excess of the solder fusing temperatue (183˚C for Sn/Pb 63/37)
for 25 seconds, and a peak temperature above 195˚C should be
reached.
Maximum temperature:
To avoid damage to the module, the refl ow profi le should
be optimised to avoid overheating. The case temperature
(TC) should be monitored with a thermocouple attached to
the center of the top of the case using an adhesive or heat
conductive paste.
A suffi ciently 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
module it is also recommended to minimise the time in refl ow
as much as possible.
Conventional Sn-Pb convection solder process
For conventional Sn-Pb solder processes, the PMA 5000 series
regulator is qualifi ed for MSL 1 according to Jedec standard
(J-STD-020b July 2002).
During refl ow, the case temperature must not exceed 215˚C at
any time.
070 140 210 280 350
0
50
100
150
200
250
300
[°C]
Time
reflow ramp-
up max 3°/s cooling
max 5°/s
preheat
max 3°/s
soak zone (150°C-
180°C) 30-180s
reflow
zone
max case temperature
@ 215°C (Sn-Pb solders)
pin temperature
case temperature
14 PMA 5000 Series Datasheet EN/LZT 146 034 R1B ©Ericsson Power Modules, November 2003
Limitation of Liability
Quality
Reliability
The Mean Time Between Failure (MTBF) of the PMA 5000
series DC/DC regulator family is calculated to be greater than
(>) 12 million hours at full output power and a case temperature
of +40°C using the Ericsson failure rate data system (TILDA/
Preditool). The Ericsson failure rate data system is based on field
failure rates and is continuously updated. The data corresponds
to actual failure rates of components used in Information
Technology and Telecom equipment in temperature controlled
environments (TA= -5...+65°C). The data is considered to have
a confidence level of 90%. For more information please refer to
Design Note 002.
Quality Statement
The PMA 5000 series DC/DC regulators are designed and
manufactured in an industrial environment where quality
systems and methods like ISO 9000, 6σ (sigma), and SPC
are intensively in use to boost the continuous improvements
strategy. Conservative design rules, design reviews and product
qualifi cations, plus the high competence of an engaged work
force, contribute to the high quality of our products.
Ericsson Power Modules does not make any warranties,
expressed or implied including any warranty of merchantability
or fitness for a particular purpose (including, but not limited to,
use in life support applications, where malfunctions of product
can cause injury to a person's health or life).
Delivery Package Information
PMA 5000 series is delivered in antistatic injection moulded
trays (Jedec standard layout) or tape & reel (EIA standard).
Tray Specifi cation
Material: Polyphenylene ether (PPE)
Surface resistance: 1x105 - 9x1012 Ω/sq
Color: Black
Capacity: 30 pcs/tray
Loaded tray stacking pitch: 10.6 mm [0.417 inch]
Empty weight: 145 g
Full weight: 505 g
Miscellaneous
Notes:
- All other dimensions according to Jedec std
- Vacuum pick-up in centre of the tray
(2 cells, hatched area 43,3x54 [1.70x2.13]
E
92,1 [3.63] (2x)
1
2,7 [0.5] (2x)
43,3 [1.705] (2x)
24,65 [0.67]
27 [1.063] (9x)
36 [1.417]
322,6 ±0,25 [12.7 ±0.01]]
315 [12.4]
135,9 [5.35]
C4
12,6 [0.496]
10,6 [0.417]
1
Tape & Reel Specifi cation
Material: Conductive
Polystyrene (PS)
Tape width: 56 mm [2.20 inch]
Tape pitch: 32 mm [1.26 inch]
Total pocket height: 9.5 mm [0.37 inch]
Reel diameter: 330 mm [13 inch]
Reel hub diameter: 100 mm [4 inch]
Reel capacity: 150 pieces
Full reel weight: typ. 2.5 kg
2 [0.08] pitch 32 [1.26]
26,2 [1.04]
4±0,1 [0.16±0.004]
56 [2.2]
Round holes R=0,75mm
A
A
Detail1
9,15 [0.36]
0,5 [0.02]
A-A
0,2 [0.008]
Detail1
R0,75 [0.03]
(2
Dimensions in mm [in]
Tape leader min 400 [15.7]
Tape trailer min 160 [6.3]
1
Feed direction
Information given in this data sheet is believed to be accurate and reliable.
No re spon si bil i ty is assumed for the con se quenc es of its use nor for any infringement
of patents or other rights of third parties which may result from its use.
No license is grant ed by implication or otherwise under any patent or patent rights of
Ericsson Power Modules. These products are sold only ac cord ing to
Ericsson Power Modules’ general conditions of sale, unless oth er wise con fi rmed in
writing. Specifi cations subject to change without notice.
Datasheet
The latest and most complete infor-
mation can be found on our website
Product Program
EN/LZT 146 034 R1B
© Ericsson Power Modules AB, November 2003
VI
VO/IO max PO max Ordering No.
Output 1
4.5-5.5 V 2.5 V/12 A 30 W PMA 5319 SF
4.5-5.5 V 3.3 V/12 A 39.6 W PMA 5310 SF
Ericsson Power Modules Americas
SE-141 75 Kungens Kurva, Sweden Ericsson Inc., Power Modules
Telephone: +46 8 568 69620 +1-877-374-2642
For local sales contacts, please refer to our website Asia/Pacifi c
www.ericsson.com/powermodules Ericsson Ltd.
or call: Int +46 8 568 69620, Fax: +46 8 568 69599 +852-2590-2453
For more information about the complete product program, please refer
to our website: www.ericsson.com/powermodules
Delivery option M.o.q. Suffi x Example
Tray 150 pcs /B PMA 5xxx SF/B
Tape & Reel 300 pcs /C PMA 5xxx SF/C
Ordering Information
