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参数资料
| 型号： | LTC3203EDD-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SWITCHED CAP 10DFN |
| 标准包装： | 121 |
| 类型： | 升压（升压），切换电容（充电泵） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 4.5V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | Burst Mode? |
| 频率 - 开关： | 900kHz，1MHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 10-DFN（3x3） |
LTC3203/LTC3203-1
LTC3203B/LTC3203B-1
500mA Output Current
Low Noise Dual Mode
Step-Up Charge Pumps
FEATURES
DESCRIPTIO
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■
■
■
■
■
■
■
■
■
■
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Selectable Dual Mode Operation: 1:1.5 or 1:2
High Output Current: Up to 500mA
Low Noise Constant Frequency (1MHz/0.9MHz)
Operation*
V IN Range: 2.7V to 5.5V
Adjustable Output Voltage (LTC3203/LTC3203B)
User Selectable Fixed Output Voltages: 4.5V or 5V
(LTC3203-1 and LTC3203B-1)
Burst Mode ? Operation with
I Q ~ 120 μ A (LTC3203/LTC3203-1)
Constant Freqency Operation at All Loads
(LTC3203B/LTC3203B-1)
Soft-Start Limits Inrush Current at Turn-On
Short-Circuit/Thermal Protection
Shutdown Disconnects Load from Input
Shutdown Current: < 1 μ A
Available in a 10-pin (3mm × 3mm) DFN Package
The LTC ? 3203/LTC3203-1/LTC3203B/LTC3203B-1 are low
noise, high efficiency charge pump DC/DC converters
capable of driving loads up to 500mA from a 2.7V to 5.5V
input. Low external parts count (two flying capacitors and
bypass capacitors at V IN and V OUT ) make the LTC3203
family ideally suited for small, battery-powered applica-
tions.
Built-in soft-start circuitry prevents excessive inrush
current during start-up. High switching frequency enables
the use of small external capacitors. The LTC3203/
LTC3203-1 feature Burst Mode operation at light load to
achieve high efficiency whereas the LTC3203B/
LTC3203B-1 operate at constant frequency to achieve
lowest noise operation.
The LTC3203-1/LTC3203B-1 have a user selectable fixed
output voltage of 4.5V or 5V to power LEDs or logic
circuits. The FB pin of the LTC3203/LTC3203B can be used
APPLICATIO S
■ High Current LED Backlight Supply for
Cellphones/PDAs
to program the desired output voltage. The parts are short-
circuit and overtemperature protected and are available in
a low profile (3mm × 3mm) DFN package.
■
■
■
Cellphone Camera Light Supply
General Purpose 3.3V or Li-Ion to 5V Supply
USB ON THE GO(OTG) Devices
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*Protected by U.S. Patents including 6411531.
TYPICAL APPLICATIO
Efficiency vs V IN at 300mA Load Current
100
ON/OFF
OUTPUT PROGRAMMING
90
V IN
2.2 μ F
R1*
2.2 μ F
SHDN V SEL
LTC3203-1
V IN V OUT
C1+ C2+
C1– C2–
MODE GND
2.2 μ F
10 μ F
V OUT
500mA
80
70
60
50
40
30
V OUT = 4.5V
V OUT = 5V
100k
I OUT(MAX) V SEL V OUT
*R1
3203 F02
20
10
300mA
300mA
LOW
HIGH
4.5V
5V
316k
357k
0
2.5
3
3.5
4
4.5
5
5.5
500mA
500mA
LOW
HIGH
4.5V
5V
357k
402k
V IN (V)
3203 G05
32031fa
1
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相关代理商/技术参数 |
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|---|---|
| LTC3204 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Noise Regulated Charge Pump in 2 X 2 DFN |
| LTC3204-3.3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Noise Regulated Charge Pump in 2 X 2 DFN |
| LTC3204-5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Noise Regulated Charge Pump in 2 X 2 DFN |
| LTC3204B-3.3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Noise Regulated Charge Pump in 2 X 2 DFN |
| LTC3204B-5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Noise Regulated Charge Pump in 2 X 2 DFN |
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