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| 型号： | LTC3125EDCB#TRMPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 1900 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 3 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, DFN-8 |
| 文件页数： | 1/16页 |
| 文件大小： | 292K |
| 代理商： | LTC3125EDCB#TRMPBF |
LTC3125
1
3125f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
1.2A Synchronous Step-Up
DC/DC Converter with
Input Current Limit
The LTC
3125 is a high efciency, synchronous step-up
DC/DC converter with an accurate programmable average
input current limit. The ±5% accurate average input current
is resistor programmable and suitable for a wide variety of
applications. In mobile computing, GSM and GPRS cards
demand high current pulses well beyond the capability
of the PC Card and CompactFlash slots. The LTC3125 in
concert with a reservoir capacitor, keeps the slot power
safely within its capabilities providing a high performance
and simple solution.
Synchronous rectication produces high efciency while
the 1.6MHz switching frequency minimizes the solution
footprint. The current mode PWM design is internally com-
pensated. Output disconnect allows the load to discharge in
shutdown, while also providing inrush current limiting.
Other features include a <1μA shutdown current, short-
circuit and thermal overload protection. The LTC3125 is of-
fered in a low prole 0.75mm
× 2mm × 3mm package.
PCMCIA/CompactFlash (3.3V/500mA Max),
4V GSM Pulsed Load
n Programmable Average Input Current Limit
n 5% Input Current Accuracy
n 200mA to 1000mA Program Range
n VIN: 1.8V to 5.5V, VOUT: 2V to 5.25V
n Supports High Current GSM/GPRS Load Burst
n VIN > VOUT Operation
n 1.6MHz Fixed Frequency Operation
n Internal Current Sense Resistor
n 1.2A Peak Current Limit
n Up to 93% Efciency
n Output Disconnect in Shutdown
n Soft-Start
n Low Quiescent Current Burst Mode
Operation (15μA)
n Available in 2mm
× 3mm × 0.75mm DFN Package
n GSM/GPRS PCMCIA/CompactFlash PC Card Modems
n Wireless Emergency Locators
n Portable Radios
n Supercap Chargers
L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
CS
2.2μH
LTC3125
GND
VIN
1.24M
2200μF
2
TANT
10μF
CER
VOUT
4V
2A PULSED LOAD
VIN
3.3V
500mA
536k
3125 TA01a
SHDN
PROG
VOUT
FB
44.2k
SW
OFF ON
Efciency vs Load Current
LOAD CURRENT (A)
0.001
40
EFFICIENCY
(%)
POWER
LOSS
(W)
50
60
70
80
0.01
0.1
1
3125 TA01b
30
20
10
0
90
100
0.1
0.01
0.001
1
VOUT = 4V
VIN = 3.3V
VIN = 2.4V
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3125EDCB-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.2A Synchronous Step-Up DC/DC Converter with Input Current Limit |
| LTC3127 | 制造商:LINEAR 制造商全称:LINEAR 功能描述:40V, 2A Synchronous Buck-Boost DC/DC Converter |
| LTC3127EDD | 制造商:LINER 制造商全称:Linear Technology 功能描述:1A Buck-Boost DC/DC Converter with Programmable Input Current Limit |
| LTC3127EDD#PBF | 功能描述:IC BUCK BOOST SYNC ADJ 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 应用:热电冷却器 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.173"，4.40mm 宽）裸露焊盘 供应商设备封装:28-TSSOP 裸露焊盘 包装:管件 产品目录页面:1410 (CN2011-ZH PDF) |
| LTC3127EDD#PBF | 制造商:Linear Technology 功能描述:BUCK-BOOST DC/DC CONVERTER IC |
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