XC9301_1 Datasheet, PDF (1/13 Pages) Torex Semiconductor – PWM,PWM/PFM Switching Step-Up & Down DC/DC Converter Controller ICs

XC9301/XC9302 Series
ETR0601_001
PWM,PWM/PFM Switching Step-Up & Down DC/DC Converter Controller ICs
☆GO-Compatible
■GENERAL DESCRIPTION
The XC9301/02 series are step-up/down DC/DC converter controller ICs with fast, low ON resistance drivers built-in. A
versatile, large output current, step-up/down DC/DC converter can be realized using only 4 basic external components -
transistors, coils, diodes and capacitors.
Output voltage is selectable in 100mV increments within a 2.4V ~ 6.0V (±2.5% accuracy) range and switching frequency is
set at 180kHz or 300kHz.
The XC9302 series switches from PWM to PFM control during light loads and the series offers high efficiencies from light
loads through to large output currents.
Soft-start time is internally set to 10msec which offers protection against rush currents when the power is switched on and
also against voltage overshoot.
During shutdown (CE pin = L), consumption current can be reduced to as little as 0.5μA or less.
■APPLICATIONS
●Mobile phones
●PDAs
●Palmtop computers
●Portable audio equipment
●Various power supplies
■FEATURES
Input Voltage Range : 2.0V ~ 10V
Output Voltage Range : 2.4V ~ 6.0V (±2.5% accuracy)
(selectable in 100mV increments)
Oscillation Frequency : 180KHz, 300KHz
Output Current
(±15% accuracy)
: more than 250mA
Efficiency
(VIN=2.4V, VOUT=3.3V)
: 81%(TYP.) @ VOUT=5.0V,
Stand-By
Maximum Duty Ratio
78%(TYP.) @ VOUT=3.3V
: ISTB = 0.5μA (MAX.)
: 85%(TYP.)
PWM/PFM Switching Step-Up & Down Control (XC9302)
Package
: SOT-25
Output Voltage Internal Set-Up
■TYPICAL APPLICATION CIRCUIT
■TYPICAL PERFORMANCE
CHARACTERISTICS
100
80
60
40
20
0
0. 1
VIN=2V
4V
6V
1
10
100
1000
Output Current:OI UT（mA）
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