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參數(shù)資料
| 型號： | XC9301492MR |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 1/1頁 |
| 文件大小： | 21K |
| 代理商： | XC9301492MR |
_______________________________________________________________________________________________________________
51
XC9301/9302 Series
PWM, PWM/PFM Switching
Step-Up & Down DC/DC Controller
General Description
Features
The XC 9301/02 series are step-up/down DC /DC converter
controller IC s with fast, low ON resistance drivers built-in. A
versatile, large output current, step-up/down DC /DC con-
verter 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
( ± 2.5% accuracy) range and switching frequency is set at
180kHz.
The XC 9302 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 pro-
tection against rush currents when the power is switched on
and also against voltage overshoot.
During shutdown (C E pin = L), consumption current can be
reduced to as little as 0.5
μ
A or less.
Input Voltage Range:
2.0V ~ 10V
Output Voltage Range:
2.4V ~ 6.0V ( ± 2.5% accuracy)
(selectable in 0.1V steps)
Oscillation Frequency:
180KHz ( ± 15% accuracy)
Output Current:
more than 250mA (V
IN
=2.4V, V
OUT
=3.3V)
Efficiency:
81% (typ) at 5.0V
78% (typ) at 3.3V
Stand-By:
ISTB = 0.5
μ
A (max)
Output Voltage Internal Set-Up
SOT-25 Package
Pin Configuration
Pin Assignment
1
2
3
SOT-25
<SOT-23-5>
(TOP VIEW)
4
5
PIN
NUMBER
1
2
PIN
NAME
GND
V
DD
FUNC TION
Ground
Power Supply
3
EXT/
External Transistor Connection
4
V
OUT
Output Voltage Monitor
5
C E
C hip Enable
Block Diagram
+
-
+
-
Ramp Wave
Generator,
OSC
Error Amp.
PWM
Comparator
Buffer,
Driver
GND
EXT/
PWM/PFM
Controler
Phase
Compensation
V
DD
V
OUT
C E
Vref with
Soft Start,
C E
Ordering Information
XC 9301
FUNC TION
FUNC TION
A
Output Voltage : 2.4 ~ 6.0
e.g. 3.0V =
Standard (5-pin)
3,
0
Package
M
SOT-25 (1reel = 3000pcs)
Oscillator frequency
2
180kHz
Embossed Tape
R
standard loading
L
reverse loading
* XC 9302 Series PWM/PFM switching control (same as XC 9301 series)
DETAILS
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