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Synchronous Step-Down

DC/DC Controller IC - Input Voltage : 25V

■GENERAL DESCRIPTION

The XC9213 series is N-ch & N-ch drive, synchronous, step-down DC/DC controller IC with a built-in bootstrap driver circuit.

Output will be stable no matter which load capacitors, including low ESR capacitors, are used.

a low ESR capacitor is used. In addition, the circuit is double protected by the ways of limiting the current while detecting

overshoot current and making output shutdown at any given timing by a protection time setting capacitor (CPRO).

The output voltage can be set freely within a range of 1.5V~15.0V with 1.0V (accuracy±2%) of internal reference voltage by

The series has a built-in voltage detector for monitoring a selected voltage by external resistors.

During stand-by (CE pin = low) all circuits are shutdown to reduce current consumption to as low as 4.0μA or less.

■APPLICATIONS

●PDAs

●Mobile phones

●Note book computers

●Portable audio systems

●Various multi-function power supplies

■TYPICAL APPLICATION CIRCUIT

■TYPICAL PERFORMANCE

CHARACTERISTICS

VOUT

CIN

CL

CSS

CSS

CE

MODE

VIN

VSENSE

VL

BST

EXT1

EXT2

PGND

AGND

CBST

RFB1

RFB2

L

CVL

SD2

RSENSE

Tr1

Tr2

VIN

XC9213

FB

LX

CPRO

CPRO

VDOUT

VDIN

VDOUT

VDIN

SD1

CFB

☆GreenOperation Compatible

■FEATURES

Input Voltage Range

: 4.0V ~ 25.0V

Output Voltage Range

: 1.5V ~ 15.0V externally set

Reference voltage: 1.0V (±2%)

Oscillation Frequency

: 300kHz (±15%)

Output Current

: More than 5A

Control

: PWM/PFM

manual-switching control

Current Limiter

Protection

: Current limit operates at voltage

sense 170mV (TYP.). Shutdown

time can be adjusted by CPRO.

High Efficiency

: 93%

Detect Voltage Function

: Detects 0.9V/Open-drain output

Stand-by Current

Load Capacitor

: Low ESR capacitor compatible

Synchronous Bootstrap N-ch & N-ch Driver

Package

: TSSOP-16

ETR0505_001