LT1373HVIN8 Datasheet

IC型號：
LT1373HVIN8
PDF描述：
250kHz Low Supply Current High Efficiency 1.5A Switching Reg...
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184.98KB
PDF頁數(shù)：
12頁
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LT1373

250kHz Low Supply Current

High Efficiency

1.5A Switching Regulator

FEATURES

DESCRIPTIO

1mA I

at 250kHz

Uses Small Inductors: 15碌H

All Surface Mount Components

Only 0.6 Square Inch of Board Space

Low Minimum Supply Voltage: 2.7V

Constant Frequency Current Mode

Current Limited Power Switch: 1.5A

Regulates Positive or Negative Outputs

Shutdown Supply Current: 12碌A(chǔ) Typ

Easy External Synchronization

8-Pin SO or PDIP Packages

The LT

廬

1373 is a low supply current high frequency

current mode switching regulator. It can be operated in all

standard switching configurations including boost, buck,

flyback, forward, inverting and 鈥淐uk.鈥?A 1.5A high effi-

ciency switch is included on the die, along with all oscilla-

tor, control and protection circuitry. All functions of the

LT1373 are integrated into 8-pin SO/PDIP packages.

Compared to the 500kHz LT1372, which draws 4mA of

quiescent current, the LT1373 switches at 250kHz, typi-

cally consumes only 1mA and has higher efficiency. High

frequency switching allows for small inductors to be used.

All surface mount components consume less than 0.6

square inch of board space.

New design techniques increase flexibility and maintain

ease of use. Switching is easily synchronized to an exter-

nal logic level source. A logic low on the shutdown pin

reduces supply current to 12碌A(chǔ). Unique error amplifier

circuitry can regulate positive or negative output voltage

while maintaining simple frequency compensation tech-

niques. Nonlinear error amplifier transconductance re-

duces output overshoot on start-up or overload recovery.

Oscillator frequency shifting protects external compo-

nents during overload conditions.

, LTC and LT are registered trademarks of Linear Technology Corporation.

APPLICATIO S

Boost Regulators

CCFL Backlight Driver

Laptop Computer Supplies

Multiple Output Flyback Supplies

Inverting Supplies

TYPICAL APPLICATIO

OFF

ON 4 S/S

5V-to-12V Boost Converter

L1*

22碌H

MBRS120T3

215k

OUT

鈥?/div>

12V

EFFICIENCY (%)

100

= 5V

f = 250kHz

LT1373

鈥?/div>

C1**

22碌F

GND

6, 7

C4**

22碌F

MAX I

OUT

0.01碌F

24.9k

OUT

15碌H 0.3A

22碌H 0.35A

*SUMIDA CD75-220KC (22碌H) OR

COILCRAFT D03316-153 (15碌H)

**AVX TPSD226M025R0200

100

OUTPUT CURRENT (mA)

1000

LT1373 鈥?TA02

LT1373 鈥?TA01

12V Output Efficiency

數(shù)據(jù)列表
LT1373
標準包裝
50
類別
集成電路 (IC)
家庭
PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器
系列
-
類型
降壓（降壓），升壓（升壓），反相，Cuk，回掃，正向轉(zhuǎn)換器
輸出類型
可調(diào)式
輸出數(shù)
1
輸出電壓
1.25 V ~ 42 V
輸入電壓
2.7 V ~ 25 V
PWM 型
電流模式
頻率 - 開關(guān)
250kHz
電流 - 輸出
1.5A
同步整流器
無
工作溫度
-40°C ~ 125°C
安裝類型
通孔
封裝/外殼
8-DIP（0.300"，7.62mm）
包裝
管件
供應商設(shè)備封裝
8-PDIP

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