AP7370

Document number: DS41820 Rev. 1 - 2

1 of 17

www.diodes.com

March 2019

© Diodes Incorporated

AP7370

WIDE INPUT VOLTAGE RANGE, 300mA ULDO REGULATOR

Description

The AP7370 series is a positive voltage regulator IC.

The AP7370 has features of wide input voltage range, high accuracy,

low dropout voltage, current limit, reverse current protection, and

ultra-low quiescent current which make it ideal for use in various USB

and portable devices and instrument application.

The IC consists of a voltage reference, an error amplifier, a resistor

network for setting output voltage, a current limit circuit for current

protection, and a chip enable circuit.

The AP7370 is available in 1.2V, 1.5V, 1.8V, 2.8V, 3.0V, 3.3V, 3.6V

and 5.0V fixed output voltage versions.

The AP7370 is available in space-saving SOT23, SOT25, SOT89 and

U-DFN2020-6 (Type C) packages.

Features



Wide Input Voltage Range: Up to 18V



Low Dropout Voltage: VDROP = 500mV @ IOUT = 100mA



Low Ground Current



High Output Voltage Accuracy



Compatible with Low ESR Ceramic Capacitor



Excellent Line/Load Regulation



Thermal Shutdown Function



Short Current Protection



Reverse Current Protection



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free. “Green” Device (Note 3)

Applications



Battery-Powered Equipment



Laptop, Palmtops, Notebook Computers



Portable Information Appliances



Metering



Weighing Scales

Pin Assignments

(Top View)

(Top View)

SOT25 (W5)

SOT25 (WR)

(Top View)

(Top View)

SOT25 (WW)

SOT89

(Top View)

(Top View)

U-DFN2020-6 (Type C)

SOT23

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-

free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and

Lead-free.

3. Halogen- and Antimony-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

Typical Applications Circuit

3

2

1

VIN

GND

VOUT

1

2

3

VIN

GND

VOUT

GND

1

2

3

5

4

VIN

GND

NC

VOUT

NC

1

2

3

5

4

VIN

GND

VOUT

NC

NC

1

2

3

5

4

GND

VIN

VOUT

NC

NC

SOT89

VOUT

NC

GND

VIN

NC

NC

1

2

3

4

5

6