IMP37 IMP Inc, IMP37 Datasheet

IMP37

Manufacturer Part Number

IMP37

Description

Low Dropout Positiv Voltage Regulators

Manufacturer

IMP Inc

Datasheet

1.IMP37.pdf (6 pages)

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The IMP37 series of Low Dropout (LDO) three-terminal voltage regula-

tors feature guaranteed low dropout voltages at currents up to 0.8A. The

IMP37 regulator family dropout voltage is guaranteed to be 0.95V or

lower at 0.8A. At 100mA, the maximum dropout voltage is 0.8V.

Compared with “1117” type LDOs, the IMP37 has a 20% lower dropout

voltage.

Three fixed output voltages are offered: 2.5V, 3.0V and 3.3V. Output volt-

ages are factory trimmed to within 1% of the nominal value.

In addition to low dropout voltages, the IMP37 family features greatly

reduced quiescent operating current. The 75 A maximum specification

represents an over 100 times improvement over competitive devices.

Devices are short circuit protected, and a thermal protection circuit shuts

the regulator off should the junction temperature exceed 165°C.

The IMP37 is available in low-profile plastic SOT-223 and TO-263

packages and are pin compatible with fixed “1117” devices.

1999 IMP, Inc.

Block Diagram

olt

Input

olt

OWER

– 800mA

– 2.5V

– 800mA

– 2.5V

w Dr

e R

ANAGEMENT

opout P

, 3.0V and 3.3V Output

opout P

, 3.0V and 3.3V Output

egulat

Current

Limit

ositiv

–

Protection

Thermal

408-432-9100/www.impweb.com

Error

Amp

–

IMP37

Low Dropout Voltage

– 0.8V maximum at 100mA

– 0.95V maximum at 800mA

– 20% lower dropout voltage than “1117”

Guaranteed Low Dropout Voltage at Multiple

Current Levels

1% Trimmed 2.5V, 3.0V and 3.3V Outputs

Reduced Quiescent Current: 75µA Maximum

Short Circuit and Thermal Protection

Space Saving SOT-223 Surface Mount Package

“1117” Pin Compatible

High-efficiency linear power supplies

Post regulator for switching supplies

5V to 3.3V linear regulators

USB hubs

Battery chargers

Routers, ISDN/DSL modems

LDO regulators

GND

–

Ref

37_01.eps

Out

(Tab)

Key Features

Applications

IMP3

Related parts for IMP37

IMP37 Summary of contents

Page 1

... The IMP37 regulator family dropout voltage is guaranteed to be 0.95V or lower at 0.8A. At 100mA, the maximum dropout voltage is 0.8V. Compared with “1117” type LDOs, the IMP37 has a 20% lower dropout voltage. Three fixed output voltages are offered: 2.5V, 3.0V and 3.3V. Output volt- ages are factory trimmed to within 1% of the nominal value ...

Page 2

... Note: Tape and reel shipping is available for the SOT-223 and TO-263 packages. Append the TAPE AND REEL designation “/T” to the ordering part number for tape and reel devices. For example, the IMP37-25JST 2.5V SOT-223 packaged device shipped in reels INPUT ...

Page 3

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . 7V Operating Junction Temperature . . . . . . . . . ...

Page 4

... S R < The IMP37 series devices have thermal limiting circuitry to protect the device from over current. For continuous operation, the maxi- mum junction temperature rating must not be exceeded 408-432-9100/www.impweb.com IMP3 IMP3 + ( the sum of ...

Page 5

Page 6

IMP, Inc. Corporate Headquarters 2830 N. First Street San Jose, CA 95134-2071 Tel: 408-432-9100 Tel: 800-438-3722 Fax: 408-434-0335 Fax-on-Demand: 1-800-249-1614 (USA) Fax-on-Demand: 1-303-575-6156 (International) e-mail: info@impinc.com http://www.impweb.com The IMP logo is a registered trademark of IMP, Inc. All other company ...

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