HTC LM39300, LM39301, LM39302 Service Manual

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3A Low-Voltage Low-Dropout Regulator

LM39300/39301/39302

TO263-3L / TO220-3L

FEATURES

•3A minimum guaranteed output current

•500mV typical dropout at 3A Ideal for 3.0V to 2.5V conversion

(39300-x.x Fixed only)

1. In

2. Gnd

3. Out

Ideal for 2.5V to 1.8V or 1.5V conversion

•1% initial accuracy

•Low ground current

•Current limiting and thermal shutdown

TO263-5L / TL220-5L

(39301-x.x & 39302 only)

•Reversed-battery protection

•Reversed-leakage protection

•Fast transient response

•TTL/CMOS compatible enable pin

-LM39301 only

•Error flag output - LM39301 only

•Adjustable version - LM39302 only

•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

PIN DESCRIPTION

Enable

(Input)

GND

OUT FLG ADJ

CMOS-compatible control input. Logic high = enable, logic Logic low or open = Shutdown

Supply (Input): +16V maximum supply Ground pin and TAB are internally connected. Regulator Output Flag (Output): Open-collector error flag output. Adjustment Input: Feedback input.

ORDERING INFORMATION

Device Marking

DESCRIPTION

LM39300T-X.X TO-220

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).

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.

LM39301R-X.X TO-263LM39301-X.X LM39301T-X.X TO-220 LM39302R-Adj LM39302T-Adj LM39302-Adj

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

1. En

2. In

3. Gnd

4. Out

5. Flg or Adj

Package

TO-263LM39300-X.XLM39300R- X.X

LM39300-X.X

LM39301-X.X LM39302-Adj TO-263

TO-220

HTC

3A Low-Voltage Low-Dropout Regulator

HTC

Typical Application Circuit

LM39300

LM39300/39301/39302

LM39301

LM39302

Absolute Maximum Ratings (Note 1)

Supply Voltage (VIN) : –20V to +20V Enable Voltage (VEN) : +20V Storage Temperature (TS) : –65°C to +150°C Lead Temperature (soldering, 5 sec) : 260°C ESD,

Note 3

Operating Ratings (Note 2)

Supply Voltage (VIN) : +2.25V to +16V Enable Voltage (VEN) : +16V Maximum Power Dissipation (PD(max))

Note 4

Junction Temperature (TJ) : –40°C to +125°C Package Thermal Resistance TO-263(θ TO-220(θ

JC) : 2°C/W JC) : 2°C/W

3A Low-Voltage Low-Dropout Regulator

HTC

Block Diagram

LM39300 Fixed (1.5V,1.8V,2.5V,3.3V,5.0V)

LM39300/39301/39302

LM39301 Fixed with Flag and Enable

LM39302 Adjustable

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