AP2120

Document number: DS41206 Rev. 5 - 2

1 of 19

www.diodes.com

March 2021

© Diodes Incorporated

AP2120

HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR

Description

The AP2120 series are positive voltage regulator ICs fabricated by

CMOS process. Each of these ICs consists of a voltage reference, an

error amplifier, a resistor network for setting output voltage, and a

current limit circuit for current protection.

The AP2120 series feature high supply voltage ripple rejection, low

dropout voltage, low noise, high output voltage accuracy, and low

current consumption which make them ideal for use in various

battery-powered devices.

The AP2120 series have 1.2V, 1.3V, 1.5V, 1.8V, 2.5V, 2.8V, 3.0V,

3.2V, 3.3V, 3.6V, 4.0V and 5.0V versions.

The AP2120 are available in standard SOT-23 packages.

Features

•

Low Dropout Voltage at IOUT = 100mA: 200mV Typical (Except

1.2V, 1.3V and 1.5V Versions)

•

Low Quiescent Current: 25µA Typical

•

High Ripple Rejection: 65dB Typical (f = 1kHz)

•

Output Current: More Than 150mA (250mA Limit)

•

Extremely Low Noise: 15µVrms@VOUT = 1.2V, 1.3V, 1.5V (10Hz

to 100kHz)

•

Excellent Line Regulation: 4mV Typical

•

Excellent Load Regulation: 12mV Typical

•

High Output Voltage Accuracy: ±2%

•

Excellent Line Transient Response and Load Transient

Response

•

Compatible with Low ESR Ceramic Capacitor (as Low as 1µF)

•

Moisture Sensitivity: Level 1 per J-STD-020

•

Terminals: Finish - Mate Tin Plated Leads, Solderable per MIL-

STD-202, Method 208

•

Weight: 0.009 grams (Approximate)

•

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

•

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

•

For automotive applications requiring specific change control

(i.e. parts qualified to AEC-Q100, PPAP capable, and

manufactured in IATF 16949 certified facilities), please

contact us or your local Diodes representative.

https://www.diodes.com/quality/product-definitions/

Pin Assignments

(Top View)

VOUT

VIN

GND

3

2

1

SOT-23 (N Package)

Applications

•

Mobile Phones, Cordless Phones

•

Wireless Communication Equipment

•

Portable Games

•

Cameras, Video Recorders

•

Sub-Board Power Supplies for Telecom Equipment

•

Battery Powered Equipment

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.