MIC69153YML - Micrel, Inc.

MIC69151/153

Single Supply VIN, Low VIN, Low VOUT,

1.5A LDO

Super ßeta PNP is a registered trademark of Micrel, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

July 2010 M9999-071210-D

General Description

The MIC69151/153 is the 1.5A output current member of

the MIC69xxx family of high current, low voltage

regulators, which support currents of 1A, 1.5A, 3A, and 5A.

The MIC69151/153 operates from a single low voltage

supply, yet offers high precision and ultra-low dropout of

500mV under worst case conditions.

The MIC69151/153 operates from an input voltage of

1.65V to 5.5V. It is designed to drive digital circuits

requiring low voltage at high currents (i.e. PLDs, DSP,

microcontroller, etc.). These regulators are available in

adjustable and fixed output voltages including 1.8V. The

adjustable version can support output voltages down to

0.5V.

The µCap design of the MIC69151/153 is optimized for

stability with low value low-ESR ceramic output capacitors.

Features of the MIC69151/153 include thermal shutdown

and current limit protection. Logic enable and error flag

pins are also available.

The MIC69151/153 is offered in a tiny 10-pin 3mm x 3mm

MLF® package and an EPAD SOIC-8 package. Both

packages have an operating temperature range of

–40°C to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• Single input voltage range: VIN: 1.65V to 5.5V

• Maximum dropout (VIN – VOUT) of 500mV

over temperature

• Adjustable output voltage down to 0.5V

• Stable with 10µF ceramic output capacitor

• Excellent line and load regulation specifications

• Logic controlled shutdown

• Thermal shutdown and current limit protection

• 10-Pin 3mm x 3mm MLF® package

• EPAD SOIC-8 package

• Available –40°C to +125°C junction temperature

Applications

• Point-of-load applications

• Industrial power

• Sensitive RF applications

___________________________________________________________________________________________________________

Typical Application

Fixed 1.8V Regulator w/Flag Err or Adjustable Regulator

Micrel, Inc. MIC69151/153

July 2010 2 M9999-071210-D

Ordering Information

Part Number Nominal

Output Voltage Junction

Temperature Range Package Lead Finish

MIC69151-1.8YML 1.8V –40° to +125°C 10-Pin 3x3 MLF® Pb-Free

MIC69151-1.8YME 1.8V –40° to +125°C 8-Pin EPAD SOIC Pb Free

MIC69153YME Adj. –40° to +125°C 8-Pin EPAD SOIC Pb Free

MIC69153YML Adj. –40° to +125°C 10-Pin 3x3 MLF® Pb-Free

Pin Configuration

NC EN5

1FLG

GND

10 ADJ/SNS

VOUT

VIN

1GND

VIN

8 FLG

SNS/ADJ

VOUT

10-Pin 3mm x 3mm MLF® (ML) 8-Pin EPAD SOIC (ME)

Pin Description

Pin Number

MLF-10 Pin Number

EPAD SOIC-8 Pin Name Pin Function

1 8 FLG Error Flag (Output): Open collector output. Active low indicates an output fault

condition.

2, 4, 5, 8 – NC Not internally connected.

3 (EP) 1 GND Ground (exposed pad is recommended to connect to ground on MLF®).

6 2 EN Enable (Input): CMOS compatible input. Logic high = enable,

logic low = shutdown. Do not leave pin floating.

7 3, 4 VIN Input voltage which supplies current to the output power device.

9 5, 6 VOUT Regulator Output.

10 (Adj) 7 (Adj) ADJ Adjustable regulator feedback input. Connect to resistor voltage divider.

10 (Fixed) 7 (Fixed) SNS Sense pin, connect to output for improved voltage regulation.

Micrel, Inc. MIC69151/153

July 2010 3 M9999-071210-D

Absolute Maximum Ratings(1)

Supply Input Voltage (VIN)................................................6V

Logic Input Voltage (VEN, VLQ)................................ 0V to VIN

Power Dissipation (PD) ........................... Internally Limited(3)

Flag ..................................................................................6V

Storage Temperature (TS).........................–65°C to +125°C

ESD(4) ............................................................................. 2kV

Operating Ratings(2)

Supply Voltage (VIN)....................................... 1.65V to 5.5V

Enable Input Voltage (VEN)..................................... 0V to VIN

Junction Temperature (TJ) ..................–40°C ≤ TJ ≤ +125°C

Package Thermal Resistance

3x3 MLF® (θJA) ...................................................60°C/W

EPAD SOIC-8 (θJA)............................................41°C/W

Electrical Characteristics(4)

TA = 25°C with VIN = VOUT + 1V; bold values indicate –40°C< TJ < +125°C; IOUT = 10mA; COUT 4.7µF ceramic, unless otherwise noted.

Parameter Conditions Min Typ Max Units

Output Voltage Accuracy (Fixed) Over temperature range –2 +2 %

Adjustable Feedback Voltage

(Adj)

0.49 0.5 0.51 V

Feedback Pin Current 0.25 1 µA

Output Voltage Line Regulation

(Note 5)

VIN = VOUT +1.0V to 5.5V

For VOUT ≥ 0.65V, VIN = 1.65 to 5.5V

±0.2 ±0.3 %/V

Output Voltage Load Regulation IL = 10mA to 1.5A ±0.2 %

VIN – VO; Dropout Voltage

(Note 6)

IL = 1.0A

IL = 1.5A

185

250

300

500

Ground Pin Current IL = 10mA

IL = 0.5A

IL = 1.5A

1.6

7.5

Ground Pin Current in Shutdown VEN = 0V 1 µA

Current Limit VOUT = 0V 1.7 2.6 A

Start-up Time VEN = VIN 10

150 µs

Thermal Shutdown 165 °C

Enable Input

Enable Input Threshold Regulator enable

Regulator shutdown

0.8 0.6

0.2 V

Enable Pin Input Current VIL ≤ 0.2V (Regulator shutdown)

VIH ≥ 0.8V (Regulator enable)

0.005

µA

Flag Output

IFLG(LEAK) Flag Output Leakage Current (Flag Off) 0.05 µA

VFLG(LO) Output Logic-Low Voltage (undervoltage condition),

IL = 5mA

150 mV

VFLG Threshold, % of VOUT below nominal (falling) 7.5 10 14 %

Hysteresis 2 %

Notes:

1. Exceeding the absolute maximum rating may damage the device.

2. The device is not guaranteed to function outside its operating rating.

3. The maximum allowable power dissipation of any TA (ambient temperature) is (PD(max) = TJ(max) – TA) / θJA. Exceeding the maximum allowable power

dissipation will result in excessive die temperature and the regulator will go into thermal shutdown.

4. Specification for packaged product only.

5. Minimum input for line regulation test is set to VOUT + 1V relative to the highest output voltage.

6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differential.

For outputs below 1.65V, dropout voltage is considered the input-to-output voltage differential with the minimum input voltage of 1.65V. Minimum

input operating voltage is 1.65V.

Micrel, Inc. MIC69151/153

July 2010 4 M9999-071210-D

Typical Characteris t ics

Power Supply

Rejection Ratio

1K 10K

FREQUENCY (Hz)

VIN = 3.3V

VOUT = 1.8V

IOUT = 0.5A

100

150

200

250

300

0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6

OUTPUT CURRENT (A)

Dropout Voltage

vs. Output Current

VOUT = 1.8V

COUT = 10µF

100

150

200

250

300

350

400

Dropout Voltage

vs. Temperature

20 40 60 80

TEMPERATURE (°C)

VIN = 3.3V

VOUT = 1.8V

IOUT=1.5A

IOUT=750mA

Ground Current

vs. Output Current

800 1200

OUTPUT CURRENT (mA)

VIN = 3V

VOUT = 1.8V

COUT = 10µF

Ground Current

vs. Temperature

20 40 60 80

TEMPERATURE (°C)

VIN = VOUT +1

VOUT = 1.8V

COUT = 10µF

0.5A

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

0 0.5 1.0 1.5 2.0 2.5 3.0

INPUT VOLTAGE (V)

Output Voltage

vs. Input Voltage

VOUT = 1.8V

COUT = 10µF

750mA

1.70

1.72

1.74

1.76

1.78

1.80

1.82

1.84

1.86

1.88

1.90

Output Voltage

vs. Temperature

20 40 60 80

TEMPERATURE (°C)

VIN = 3.3V

VOUT = 1.8V

IOUT = 10mA

1.8

1.9

2.0

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

Current Limit

vs. Temperature

20 40 60 80

TEMPERATURE (°C)

VIN = 3.3V

VOUT = 1.8V

1.786

1.788

1.790

1.792

1.794

1.796

1.798

1.800

1.802

0 0.25 0.5 0.75 1.0 1.25 1.5

OUTPUT CURRENT (A)

Load Regulation

VIN = 3V

VOUT = 1.8V

COUT = 10µF

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Enable Threshold

vs. Temperature

20 40 60 80

TEMPERATURE (°C)

VIN = 2.8V

VOUT = 1.8V

COUT = 10µF

IOUT = 100mA

OFF

Micrel, Inc. MIC69151/153

July 2010 5 M9999-071210-D

Functional Characteristics

Micrel, Inc. MIC69151/153

July 2010 6 M9999-071210-D

Functional Diagram

ENABLE

OUT

ADJ

VREF

GND

VREF

50mV FLG

Micrel, Inc. MIC69151/153

July 2010 7 M9999-071210-D

Application Information

The MIC69151/153 is an ultra-high performance low

dropout linear regulator designed for high current

applications requiring a fast transient response. It utilizes

a single input supply, perfect for low-voltage DC-to-DC

conversion. The MIC69151/153 requires a minimum

number of external components.

The MIC69151/153 regulator is fully protected from

damage due to fault conditions offering constant current

limiting and thermal shutdown.

Input Supply Voltage

VIN provides high current to the collector of the pass

transistor. The minimum input voltage is 1.65V allowing

conversion from low voltage supplies.

Output Capacitor

The MIC69151/153 requires a minimum of output

capacitance to maintain stability. However, proper

capacitor selection is important to ensure desired

transient response. The MIC69151/153 is specifically

designed to be stable with low ESR ceramic chip

capacitors. A 10µF ceramic chip capacitor should satisfy

most applications. Output capacitor can be increased

without bound. See typical characteristics for examples

of load transient response.

X7R dielectric ceramic capacitors are recommended

because of their temperature performance. X7R-type

capacitors change capacitance by only 15% over their

operating temperature range and are the most stable

type of ceramic capacitors. Z5U and Y5V dielectric

capacitors change value by as much as 50% and 60%,

respectively over their operating temperature ranges. To

use a ceramic chip capacitor with Y5V dielectric the

value must be much higher than an X7R ceramic or a

tantalum capacitor to ensure the same capacitance

value over the operating temperature range. Tantalum

capacitors have a very stable dielectric (10% over their

operating temperature range) and can also be used with

this device.

Input Capacitor

An input capacitor of 1µF or greater is recommended

when the device is more than 4 inches away from the

bulk supply capacitance or when the supply is a battery.

Small, surface mount, ceramic chip capacitors can be

used for the bypassing. The capacitor should be placed

within 1 inch of the device for optimal performance.

Larger values will help to improve ripple rejection by

bypassing the input to the regulator further improving the

integrity of the output voltage.

Minimum Load Current

The MIC69151/153 regulator is specified between finite

loads. If the output current is too small, leakage currents

dominate and the output voltage rises. A 10mA minimum

load current is necessary for proper operation.

Adjustable Regulator Design

The MIC69153 adjustable version allows programming

the output voltage anywhere between 0.5V and 5.5V

with two resistors. The resistor value between VOUT and

the adjust pin should not exceed 10kΩ. Larger values

can cause instability. The resistor values are calculated

by:

⎟

⎠

⎞

⎜

⎝

⎛+∗= 1

0.5V

OUT

Where VOUT is the desired output voltage.

Enable

The fixed output voltage versions of the MIC69151

feature an active high enable input (EN) that allows on-

off control of the regulator. Current drain reduces to near

“zero” when the device is shutdown, with only

microamperes of leakage current. EN may be directly

tied to VIN and pulled up to the maximum supply voltage.

Thermal Design

Linear regulators are simple to use. The most

complicated design parameters to consider are thermal

characteristics. Thermal design requires the following

application-specific parameters:

• Maximum ambient temperature (TA)

• Output current (IOUT)

• Output voltage (VOUT)

• Input voltage (VIN)

• Ground current (IGND)

First, calculate the power dissipation of the regulator

from these numbers and the device parameters from this

data sheet.

D = (VIN – VOUT) IOUT + VIN IGND

where the ground current is approximated by using

numbers from the “Electrical Characteristics” or “Typical

Characteristics” sections. The maximum allowable

power dissipation of any TA (ambient temperature) is

PD(max) = (TJ(max) – TA) / θJA. Exceeding the maximum

allowable power dissipation will result in excessive die

temperature and the regulator will go into thermal

shutdown.

Refer to “Application Note 9” for further details and

examples on thermal design and heat sink applications.

Micrel, Inc. MIC69151/153

July 2010 8 M9999-071210-D

Package Information

10-Pin 3mm x 3mm MLF® (ML)

8-Pin EPAD SOIC (ME)

Micrel, Inc. MIC69151/153

July 2010 9 M9999-071210-D

MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 US

TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com

The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its

use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.

Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product

can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implan

into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A

Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully

indemnify Micrel for any damages resulting from such use or sale.