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XC9302 Datasheet

  • XC9302

  • PWM, PWM/PFM Switching Step-Up & Down DC/DC Converter Contro...

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Series
PWM, PWM/PFM Switching Step-Up & Down DC/DC Converter Controller ICs
NInput
Voltage Range : 2.0V ~10.0V
NOutput
Voltage Range : 2.4V ~ 6.0V (鹵2.5% accuracy)
NOscillation
Frequency Range
: 180kHz, 300kHz (鹵15% accuracy)
NMaximum
Duty Ratio : 85% (typ)
NPWM/PFM
Switching Step-Up & Down Control (XC9302)
NEfficiency
NSOT-25
Package
: 81% (typ) 5.0V , 78% (typ) 3.3V
鈻燗pplications
GMobile
phones
GPDAs
GPalmtop
computers
GPortable
audio equipment
GVarious
power supplies
鈻燝eneral 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 realised using only 4
basic external components - transistors, coils, diodes and capacitors.
Output voltage is selectable in 0.1V steps within a 2.4V ~ 6.0V ( 鹵 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 10 msec 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 0.5碌A(chǔ) or less.
鈻燜eatures
Input Voltage Range
: 2.0V ~ 10V
Output Voltage Range
: 2.4V ~ 6.0V ( 鹵 2.5% accuracy)
(selectable in 0.1V steps)
Oscillation Frequency
: 180KHz, 300KHz ( 鹵 15% accuracy)
Output Current
: more than 250mA (V
IN
=2.4V,
Efficiency
Stand-By
V
OUT
=3.3V)
: 81% (typ) at 5.0V, 78% (typ) at 3.3V
: ISTB = 0.5碌A(chǔ) (max)
6
Output Voltage Internal Set-Up
SOT-25 Package
鈻燭ypical Application Circuit
V
OUT
SD2
L
PSW
V
IN
鈻燭ypical Performance Characteristic
100
Efficiency:EFFI 錛?錛?/div>
80
NSW
SD1
60
V
IN
=2V
40
4V
20
6V
C
L
C
IN
CE
0
0. 1
1
10
100
1000
Output Current:I
OUT
錛坢A錛?/div>
597

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