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參數資料
| 型號： | LTC3125EDCB#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING REGULATOR, 1900 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 2 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, DFN-8 |
| 文件頁數： | 1/18頁 |
| 文件大?。?/td> | 303K |
| 代理商： | LTC3125EDCB#TRPBF |
LTC3125
1
3125fa
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 resistor programmable average
input current limit is 5% accurate at 500mA and is 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
offered 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
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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| LTC3127EDD#PBF | 功能描述:IC BUCK BOOST SYNC ADJ 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 應用:熱電冷卻器 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.173"，4.40mm 寬）裸露焊盤 供應商設備封裝:28-TSSOP 裸露焊盤 包裝:管件 產品目錄頁面: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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