XC9213_2 Datasheet, PDF (1/34 Pages) Torex Semiconductor – Synchronous Step-Down DC/DC Controller IC - Input Voltage : 25V

XC9213 Series
ETR0505_001
Synchronous Step-Down
DC/DC Controller IC - Input Voltage : 25V
ˑGreenOperation Compatible
˙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.
Resistance (RSENSE) of about several 10mЊ 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 (accuracyʶ2%) of internal reference voltage by
using externally connected resistors (RFB1, 2). Synchronous rectification PWM control can be switched to non-synchronous
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 4.0ЖA or less.
˙APPLICATIONS
˔PDAs
˔Mobile phones
˔Note book computers
˔Portable audio systems
˔Various multi-function power supplies
˙FEATURES
Input Voltage Range : 4.0V ~ 25.0V
Output Voltage Range : 1.5V ~ 15.0V externally set
Reference voltage: 1.0V (ʶ2%)
Oscillation Frequency : 300kHz (ʶ15%)
Output Current
: More than 5A
(VIN=5.0V, VOUT=3.3V)
Control
: PWM/PFM
manual-switching control
Current Limiter
: Current limit operates at voltage
Protection
sense 170mV (TYP.). Shutdown
time can be adjusted by CPRO.
High Efficiency
: 93%
[TYP. PWM Mode@VIN=5.0V,
VOUT=3.3V, IOUT=1A]
Detect Voltage Function : Detects 0.9V/Open-drain output
Stand-by Current
: ISTB = 4.0ЖA (MAX.)
Load Capacitor
: Low ESR capacitor compatible
Synchronous Bootstrap N-ch & N-ch Driver
Package
: TSSOP-16
˙TYPICAL APPLICATION CIRCUIT ˙TYPICAL PERFORMANCE
CHARACTERISTICS
SD2
RSENSE
VIN VSENSE BST
VIN CIN
VDIN
VDOUT
VDIN
VDOUT
XC9213
VL
EXT1
LX
CVL
CSS
CSS
CPRO
FB
EXT2
AGND MODE CE PGND
CPRO
CBST
Tr1
L
SD1
CFB
Tr2
VOUT
RFB1
CL
RFB2
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