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XC9213 Datasheet(PDF) 1 Page - Torex Semiconductor

Part No. XC9213
Description  Driver Transistor Built-In Synchronous Step-Down DC/DC Controller Ics
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Maker  TOREX [Torex Semiconductor]
Homepage  http://www.torex.co.jp
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XC9213 Datasheet(HTML) 1 Page - Torex Semiconductor

   
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Preliminary
May 20, 2003 Ver. 1
! Synchronous, Bootstrap
Nch-Nch Drive
" APPLICATIONS
! 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
" GENERAL DESCRIPTION
" FEATURES
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
: More than 5A (VIN=5.0V, VOUT=3.3V)
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
" TYPICAL APPLICATION CIRCUIT
" TYPICAL PERFORMANCE CHARACTERISTICS
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


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