3A Low-Voltage Low-Dropout Regulator

LM39300/39301/39302

FEATURES

•3A minimum guaranteed output current

•500mV typical dropout at 3A

Ideal for 3.0V to 2.5V conversion

Ideal for 2.5V to 1.8V or 1.5V conversion

•1% initial accuracy

•Low ground current

•Current limiting and thermal shutdown

•Reversed-battery protection

•Reversed-leakage protection

•Fast transient response

•TO-263 and TO-220 packaging

APPLICATIONS

•LDO linear regulator for PC add-in cards

•High-efficiency linear power supplies

•Multimedia and PC processor supplies

•SMPS post regulator

•Low-voltage microcontrollers

•StrongARM™ processor supply

ORDERING INFORMATION

DESCRIPTION

HTC

LM39302T-Adj

LM39302-Adj

LM39300T-X.X

TO-220

LM39301T-X.X

TO-220

Regulator Output

ADJ

OUT

Device

Marking

Flag (Output): Open-collector error flag output.

LM39301R-X.X

TO-263

LM39301-X.X

TO-263

LM39300-X.X

LM39300R- X.X

LM39301-X.X

1

LM39302R-Adj

TO-220

GND

FLG

Ground pin and TAB are internally connected.

LM39300-X.X

Adjustment Input: Feedback input.

Package

LM39302-Adj

TO-263

PIN DESCRIPTION

Enable

(Input)

IN

CMOS-compatible control input.

Logic high = enable, logic

Logic low or open = Shutdown

Supply (Input): +16V maximum supply

* X.X = Fixed Vout = 1.5V, 1.8V, 2.5V, 3.3V, 5.0V

The LM39300/1/2 is ideal for PC add-in cards that need to convert from standard 5V or 3.3V down to new,

lower core voltages. A guaranteed maximum dropout voltage of 500mV over all operating conditions allows

the LM39300/1/2 to pro-vide 2.5V from a supply as low as 3V.

The LM39300/1/2 also has fast transient response for heavy switching applications.The device requires

only 47F of output capacitance to maintain stability and achieve fast transient responseThe LM39300/1 is

fully protected with over current limiting,thermal shutdown, reversed-battery protection, reversed-leakage

protection, and reversed-lead insertion. The LM39301 offers a TTL-logic compatible enable pin and an

error flag that indicates under voltage and over current conditions. Offered in fixed voltages, the

LM39300/1/2 comesin the TO-220 and TO-263 packages and is an ideal upgrade to older, NPN-based

linear voltage regulators.

TO263-3L / TO220-3L

(39300-x.x Fixed only)

1. In

2. Gnd

3. Out

1. En

2. In

3. Gnd

4. Out

5. Flg or Adj

TO263-5L / TL220-5L

(39301-x.x & 39302 only)

The LM39300, LM39301 and LM39302 are 3.0A

low-dropout linear voltage regulators that provide

a low voltage, high-current output with a

minimum of external components.

The LM39300/1 offers extremely low dropout

(typically 400mV at 3.0A) and low ground current

(typically 36mA at 3.0A).