Preliminary

May 20, 2003 Ver. 1

! Synchronous, Bootstrap

Nch-Nch Drive

! Input Voltage Range

: 2.5V ~ 25.0V

# PDAs

! Switching Frequency

: 300kHz (±15%)

# Mobile Phones

! PWM/PFM Manual Switching Control

# Note book computers

! Overcurrent Protection Circuit Built-In

# Portable Audio Systems

! High Efficiency

: 93% (TYP.)

# Various Multi-function Power Supplies

! TSSOP-16 Package

! Ceramic Capacitor Compatible

Input Voltage Range

: 2.5V ~ 25.0V

Output Voltage Range

: 1.5V ~ 15.0V externally set

Reference voltage : 1.0V (±1.5%)

Oscillation Frequency

: 300kHz (±15%)

Output Current

Control

: PWM/PFM manual-switching control.

Current Limiter, Protection

: Current limit operates at voltage

sense 150mV.

Shutdown time can be adjusted

by CPRO.

High Efficiency

: 93% (TYP., PWM mode @ VIN=5.0V,

VOUT = 3.3V, 1A)

Detect Voltage Function

: Detects 0.9V / Open-drain output

Stand-by Current

: ISTB = 3.0

µA (MAX.)

Load Capacitor

: Low ESR (ceramic, etc.)

capacitor compatible

Package

: TSSOP-16

Driver Transistor Built-In

Synchronous Step-Down DC/DC Controller Ics

XC9213 Series

Input Voltage : 25V

VOUT

CIN

CL

CS S

CSS

CE

MO DE

VIN

VSENSE

VL

BST

EXT1

EXT2

PGND

AG ND

CB ST

SD1

CFB

RFB 1

RFB 2

L

CV L

SD2

RS ENS E

N1

N2

VIN

XC9213

FB

Lx

CPRO

CP RO

VDo u t

VDi n

VDo u t

(

)

VDi n

XC9213 series is Nch-Nch drive, synchronous, step-down DC/DC

controller ICs with a built-in bootstrap driver circuit. Output will be

stable no matter which load capacitors, including a low ESR

capacitor, are used.

Resistance (RSENSE) of about 100m

Ω will be required as a current

sense. The phase compensation is also run when 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

±1.5%) of internal reference voltage by using

externally connected resistors (RFB1, 2). Synchronous rectification

PWM control can be switched to non-synchronous 30mV current

limit PFM/PWM automatic switchable control (= voltage between

RSENSE pins) by using the MODE pin.

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 3.0

µA or less.

XC9213B103V (FOSC:300kHz,3.0V)

0

20

40

60

80

100

0.01

0.1

1

10

Output Current IOUT (A)

VIN : 5.0V, Tr1,Tr2: IRF7313,

L : 6.1uH (CDRH127-6H1), Cout : 150uF (OS)

PWM

Synchronous Rectification

PWM / PFM

Non Synchronous Rectification

1