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LT1616

更新时间： 2024-11-10 14:57:47
品牌 Logo 应用领域
亚德诺 - ADI 开关稳压器
页数 文件大小 规格书
16页 281K
描述
采用 SOT-23 封装的 600mA、1.4MHz 降压型开关稳压器

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中文翻译

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LT1616 数据手册

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LT1616  
600mA, 1.4MHz Step-Down  
Switching Regulator  
in SOT-23  
U
FEATURES  
DESCRIPTIO  
The LT®1616 is a current mode PWM step-down DC/DC  
converter with internal 0.6A power switch, packaged in a  
tiny 6-lead SOT-23. The wide input range of 3.6V to 25V  
makes the LT1616 suitable for regulating a wide variety of  
power sources, from 4-cell batteries and 5V logic rails to  
unregulated wall transformers and lead-acid batteries. Its  
high operating frequency allows the use of tiny, low cost  
inductors and ceramic capacitors. With its internal com-  
pensation eliminating additional components, a complete  
400mA step-down regulator fits onto 0.15 square inches  
of PC board area.  
■
Wide Input Range: 3.6V to 25V  
■
5V at 400mA from 7V to 25V Input  
■
3.3V at 400mA from 4.7V to 25V Input  
■
Fixed Frequency 1.4MHz Operation  
■
Uses Tiny Capacitors and Inductors  
■
Internally Compensated  
■
Low Shutdown Current: <1µA  
■
Low VCESAT Switch: 220mV at 300mA  
■
Tiny 6-Lead SOT-23 Package  
U
APPLICATIO S  
The constant frequency current mode PWM architecture  
and stable operation with ceramic capacitors results in  
low, predictable output ripple. Current limiting provides  
protectionagainstshortedoutputs.Thelowcurrent(<1µA)  
shutdown provides complete output disconnect, enabling  
easy power management in battery-powered systems.  
■
Wall Transformer Regulation  
■
Local Logic Supply Conversion:  
12V to 5V  
12V or 5V to 3.3V, 2.5V or 1.8V  
■
Distributed Supply Regulation  
■
Digital Cameras  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
■
Battery-Powered Equipment  
U
TYPICAL APPLICATIO  
3.3V Step-Down Converter  
Efficiency  
D2  
100  
90  
5
4
1
V
IN  
V
BOOST  
IN  
4.5V TO 25V  
C3  
V
IN  
= 5V  
V
= 12V  
IN  
L1  
10µH  
LT1616  
0.01µF  
6
V
OUT  
80  
70  
60  
50  
40  
30  
OFF ON  
SHDN  
SW  
3.3V  
300mA: V = 4.5V TO 25V  
IN  
IN  
GND  
2
FB  
3
V
= 20V  
R1  
16.5k  
IN  
D1  
400mA: V = 4.7V TO 25V  
C1  
1µF  
C2  
10µF  
R2  
10k  
C1: TAIYO-YUDEN TMK316BJ105  
C2: TAIYO-YUDEN JMK316BJ106ML  
D1: ON SEMICONDUCTOR MBR0530  
D2: 1N4148  
1616 TA01  
100  
200  
LOAD CURRENT (mA)  
500  
0
300  
400  
L1: SUMIDA CR43-100  
1616 G02  
1
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