Diodes AP2126 User Manual

Data Sheet

300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR AP2126

General Description

The AP2126 series are positive voltage regulator ICs
fabricated by CMOS process.

The AP2126 series have features of low dropout
voltage, low noise, high output voltage accuracy, and

low current consumption which
use in various battery-powered devices.

AP2126 is available in 1.25V to 5.5V adjustable
voltage versions.

AP2126 series are available in SOT-23-5 Package.

make them ideal for

Features

· Wide Operating Voltage: 3.0V to 6V

· High Output Voltage Accuracy: ±2%

· High Ripple Rejection:

68dB@ f=1kHz, 54dB@ f=10kHz

· Low Standby Current: 0.1μA

· Low Dropout Voltage: 170mV@300mA for

=3.3V, 140mV@300mA for V

V

OUT

OUT

=5.2V

· Low Quiescent Current: 60μA Typical

· Low Output Noise: 80μVrms@ V

OUT

=1.25V

· Short Current Limit: 50mA

· Over Temperature Protection

· Compatible with Low ESR Ceramic Capacitor:

1μF for C

and C

IN

OUT

· Excellent Line/Load Regulation

· Soft Start Time: 50μs

· Auto Discharge Resistance: R

DS(ON)

=60Ω

Applications

· Datacom

· Notebook Computers

· Mother Board

SOT-23-5

Figure 1. Package Type of AP2126

Sep. 2012 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

1

Data Sheet

1

2

34

5

Shutdown

and

Logic Control

Current Limit

And

Thermal

Protection

MOS Driver

V

REF

Shutdown

GND

V

IN

V

OUT

ADJ

300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR AP2126

Pin Configuration

K Package

(SOT-23-5)

Figure 2. Pin Configuration of AP2126 (Top View)

Functional Block Diagram

V

GND

IN

V

OUT

ADJShutdown

Sep. 2012 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

Figure 3. Functional Block Diagram of AP2126

2

Data Sheet

300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR AP2126

Ordering Information

AP2126 -

Circuit Type

G1: Green

TR: Tape and Reel

Package

ADJ: ADJ Output

K: SOT-23-5

Package Temperature Range Part Number Marking ID Packing Type

SOT-23-5

BCD Semiconductor's products, as designated with "G1" suffix in the part number, are RoHS compliant and Green.

-40 to 85

o

C

AP2126K-ADJTRG1 GHH Tape & Reel

Sep. 2012 Rev. 1. 5

BCD Semiconductor Manufacturing Limited

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Data Sheet

300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR AP2126

Absolute Maximum Ratings (Note 1)

Parameter Symbol Value Unit

Input Voltage V

Shutdown Input Voltage V

Output Current I

Junction Temperature T

Storage Temperature Range T

Lead Temperature (Soldering, 10sec) T

Thermal Resistance (Junction to Ambient) θ

IN

CE

OUT

J

STG

LEAD

JA

6.5 V

-0.3 to VIN+0.3 V

450 mA

o

C/W

o

o

o

150

-65 to 150

260

250

C

C

C

ESD (Human Body Model) ESD 6000 V

ESD (Machine Model) ESD 250 V

Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated
under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods
may affect device reliability.

Recommended Operating Conditions

Parameter Symbol Min Max Unit

Input Voltage V

Operating Ambient Temperature Range T

IN

A

Sep. 2012 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

4

3.0 6 V

-40 85

o

C