參數(shù)資料
型號(hào)： LT1374
廠商： Linear Technology Corporation
英文描述： 4.5A, 500kHz Step-Down Switching Regulator(4.5A, 500kHz步降開(kāi)關(guān)穩(wěn)壓器)
中文描述： 4.5A，500kHz降壓型開(kāi)關(guān)穩(wěn)壓器（4.5A，500kHz的步降開(kāi)關(guān)穩(wěn)壓器）
文件頁(yè)數(shù)： 1/28頁(yè)
文件大小： 267K
代理商： LT1374
1
LT1374
4.5A, 500kHz Step-Down
Switching Regulator
I
Constant 500kHz Switching Frequency
I
Easily Synchronizable
I
Uses All Surface Mount Components
I
Inductor Size Reduced to 1.8
μ
H
I
Saturating Switch Design: 0.07
I
Effective Supply Current: 2.5mA
I
Shutdown Current: 20
μ
A
I
Cycle-by-Cycle Current Limiting
The LT
1374 is a 500kHz monolithic buck mode switching
regulator. A 4.5A switch is included on the die along with
all the necessary oscillator, control and logic circuitry. High
switching frequency allows a considerable reduction in the
size of external components. The topology is current mode
for fast transient response and good loop stability. Both
fixed output voltage and adjustable parts are available.
A special high speed bipolar process and new design tech-
niques achieve high efficiency at high switching frequency.
Efficiency is maintained over a wide output current range
by using the output to bias the circuitry
and by utilizing a
supply boost
capacitor to saturate the power switch.
The LT1374 fits into standard 7-pin DD, TO-220 and fused
lead SO-8 packages. Full cycle-by-cycle short-circuit
protection and thermal shutdown are provided. Standard
surface mount external parts are used, including the
inductor and capacitors. There is the optional function of
shutdown or synchronization. A shutdown signal reduces
supply current to 20
μ
A. Synchronization allows an exter-
nal logic level signal to increase the internal oscillator from
580kHz to 1MHz.
, LTC and LT are registered trademarks of Linear Technology Corporation.
5V Buck Converter
LOAD CURRENT (A)
0
E
100
95
90
85
80
75
70
2.0
2.5
3.0
3.5
1374 TA02
0.5
1.0
1.5
4.0
V
OUT
= 5V
V
IN
= 10V
L = 10
μ
H
Efficiency vs Load Current
BOOST
LT1374-5
V
IN
SHDN
OUTPUT**
5V, 4.25A
* RIPPLE CURRENT RATING
≥
I
/2
** INCREASE L1 TO 10
μ
H FOR LOAD CURRENTS ABOVE 3.5A AND TO 20
μ
H ABOVE 4A
SEE APPLICATIONS INFORMATION
INPUT
6V TO 25V
1374 TA01
C2
0.27
μ
F
C
1.5nF
D1
MBRS330T3
C1
100
μ
F, 10V
SOLID
TANTALUM
C3*
10
μ
F TO
50
μ
F
DEFAULT
= ON
D2
1N914
L1**
5
μ
H
V
SW
SENSE
V
C
BIAS
GND
+
+
I
Portable Computers
I
Battery-Powered Systems
I
Battery Chargers
I
Distributed Power
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
U
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT137415CS8 制造商:Linear Technology 功能描述:
LT1374C 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:4.5A, 500kHz Step-Down Switching Regulator
LT1374CFE 功能描述:IC REG BUCK ADJ 4.5A 16TSSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:升壓（升壓） 輸出類(lèi)型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開(kāi)關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱(chēng):AS1323-BTTT-30CT
LT1374CFE#PBF 功能描述:IC REG BUCK ADJ 4.5A 16TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類(lèi)型:降壓（降壓） 輸出類(lèi)型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開(kāi)關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁(yè)面:1032 (CN2011-ZH PDF) 其它名稱(chēng):296-25628-2
LT1374CFE#TR 功能描述:IC REG BUCK ADJ 4.5A 16TSSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:升壓（升壓） 輸出類(lèi)型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開(kāi)關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱(chēng):AS1323-BTTT-30CT
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