Diodes AUR9713 User Manual

1.5MHz, 1A, STEP DOWN DC-DC CONVERTER AUR9713

Data Sheet

General Description

The AUR9713 is a high efficiency step-down
DC-DC voltage converter. The chip operation is
optimized using constant frequency, peak-current
mode architecture with built-in synchronous power
MOS switchers and internal compensators to reduce
external part counts. It is automatically switching
between the normal PWM mode and LDO mode to
offer improved system power efficiency covering a
wide range of loading conditions.

The oscillator and timing capacitors are all built-in
providing an internal switching frequency of

1.5MHz that allows the use only small surface mount
inductors and capacitors for portable product
implementations. Additional features included
integrated Soft Start (SS), Under Voltage Lock OUT
(UVLO).

The device is available in adjustable output voltage
versions ranging from 1V to 3.3V, and is able to
deliver up to 1A.

The AUR9713 is available in TSOT-23-5 package.

Features

• High Efficiency Buck Power Converter

• Low Quiescent Current

• Output Current: 1A

• Adjustable Output Voltage from 1V to 3.3V

• Wide Operating Voltage Range: 2.5V to 5.5V

•

Built-in Power Switches for Synchronous

Rectification with High Efficiency

• Feedback Voltage: 600mV

• 1.5MHz Constant Frequency Operation

• Automatic PWM/LDO Mode Switching Control

• Thermal Shutdown Protection

• Low Drop-out Operation at 100% Duty Cycle

• No Schottky Diode Required

Applications

• Mobile Phone, Digital Camera and MP3 Player

• Headset, Radio and Other Hand-held Instrument

• Post DC-DC Voltage Regulation

• PDA and Notebook Computer

TSOT-23-5

Figure 1. Package Type of AUR9713

Mar. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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Data Sheet

1.5MHz, 1A, STEP DOWN DC-DC CONVERTER AUR9713

Pin Configuration

H Package

(TSOT-23-5)

EN

GND

LX

Figure 2. Pin Configuration of AUR9713 (Top View)

1

2

34

5

FB

VIN

Pin Description

Pin Number Pin Name Function

1 EN Enable signal input, active high

2 GND

3 LX Connected to inductor

This pin is the GND reference for the NMOS power stage. It
must be connected to the system ground

4 VIN Power supply input

5 FB Feedback voltage from the output

Mar. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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Data Sheet

1.5MHz, 1A, STEP DOWN DC-DC CONVERTER AUR9713

Functional Block Diagram

Figure 3. Functional Block Diagram of AUR9713

Ordering Information

AUR9713

Circuit Type

A: Adjustable Output

Package

TSOT-23-5 -40 to 80°C AUR9713AGH 9713AG Tape & Reel

Temperature

Range

Part Number Marking ID Packing Type

BCD Semiconductor's Pb-free products, as designated with "G" in the part number, are RoHS compliant and
green.

Mar. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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Package
H: TSOT-23-5
G: Green

Data Sheet

1.5MHz, 1A, STEP DOWN DC-DC CONVERTER AUR9713

Absolute Maximum Ratings (Note 1)

Parameter Symbol Value Unit

Supply Input Voltage VIN

Enable Input Voltage VEN

Output Voltage V

Power Dissipation (On PCB, TA=30°C) PD

Thermal Resistance (Junction to Ambient, Simulation) θJA

Thermal Resistance (Junction to Case, Simulation) θJC

Operating Junction Temperature TJ

Operating Temperature TO

Storage Temperature TS

ESD (Human Body Model) V

ESD (Machine Model) VMM

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.

OUT

HBM

0 to 6.5

-0.3 to VIN+0.3

-0.3 to VIN+0.3

0.96

98.4

35.2

160

-40 to 85

-55 to 150

2000

200

V

V

V

W

°C/W

°C/W

°C

°C

°C

V

V

Recommended Operating Conditions

Parameter Symbol Min Max Unit

Supply Input Voltage VIN 2.5 5.5 V

Junction Temperature Range TJ -20 125 °C

Ambient Temperature Range TA -40 80 °C

Mar. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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Data Sheet

1.5MHz, 1A, STEP DOWN DC-DC CONVERTER AUR9713

Electrical Characteristics

VIN=3.6V, V

Parameter Symbol Conditions Min Typ Max Unit

Input Voltage Range VIN 2.5 5.5 V

=2.5V, V

OUT

=0.6V, L=2.2µH, CIN=4.7µF, C

REF

=10µF, TA=25°C, I

OUT

MAX

=1A.

Shutdown Current I
Regulated1Feedback

Voltage
Regulated Output
Voltage Accuracy

∆V

Peak Inductor
Current

Oscillator Frequency f

PMOSFET RON R

NMOSFET RON R

Quiescent Current IQ I

LX Leakage Current ILX

V

OFF

For Adjustable Output Voltage 0.585 0.6 0.615 V

V

FB

OUT/VOUT

I

OSC

ON(P)

ON(N)

PK

V

VIN=3.6V, I

VIN=2.5V, I

=0 0.1 1 µA

EN

=2.5V to 5.5V;

V

IN

=0 to 1A

I

OUT

V

=3V, VFB=0.5V or

IN

=90%, Duty Cycle＜35%

V

OUT

=3.6V 1.2 1.5 1.8 MHz

IN

=200mA 0.28 Ω

OUT

=200mA 0.38 Ω

OUT

=0mA, VFB=V

LOAD

=5V, VEN=0V, VLX=0V or

V

IN

+5% 100 µA

REF

5V

-3 3 %

1.5 A

0.01 0.1 µA

Feedback Current IFB 30 nA

EN Leakage Current IEN 0.01 0.1 µA
EN High-level Input

Voltage
EN Low-Level Input
Voltage
Under Voltage Lock
Out

VIN=2.5V to 5.5V 1.5 V

V

EN_H

V

V

EN_L

=2.5V to 5.5V 0.6 V

IN

1.8 V

Hysteresis 0.1 V

Thermal Shutdown TSD 150 °C

Mar. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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