LM5171
LM5171
1.5A 280K Hz BOOST REGULATOR
GENERAL DESCRIPTION
The LM5171 product is 280 kHz switching regulator with a high efficiency, 1.5 A integrated switch.
This part operate over a wide input voltage range, from 2.7V to 30V. The flexibility of the design allows the
chip to operate in most power supply configurations, including boost, flyback, forward, inverting, and SEPIC.
The ICs utilize current mode architecture, which allows excellent load and line regulation, as well as a practical
means for limiting current. Combining high frequency operation with a highly integrated regulator circuit results
in an extremely compact power supply solution. The circuit design includes provisions for features such as
frequency synchronization, shutdown, and feedback control.
PIN CONNECTIONS AND
MARKING DIAGRAM
1
V
c
FB
Test
SS
8
V
SW
PGND
AGND
V
CC
ORDERING INFORMATION
PART NO.
LM5171CM
LM5171CN
TEMP. RANGE ( )
0
0
70
70
PACKAGE
8-Pin SOP
8- Pin DIP
FEATURES
Integrated Power Switch: 1.5 A Guaranteed
Wide Input Range: 2.7 V to 30 V
High Frequency Allows for Small Components
Minimum External Components
Easy External Synchronization
Built in Overcurrent Protection
Frequency Foldback Reduces Component
Stress During an Overcurrent Condition
Thermal Shutdown with Hysteresis
Shut Down Current: 50 A Maximum
Wide Ambient Temperature Range
- Commercial Grade: 0°C to 70°C
Application Diagram
R2
3.72 k
1
2
3
D1
V
C
CS5171
LM5171
V
SW
PGND
8
7
MBRS120T3
+
V
OUT
C1
0.01 F
FB
Test
AGND
6
L1
V
CC
5
22 H
C3
22 F
SS
3.3V
R1
5k
4
SS
R3
1.28 k
C2
22 F
+
ABSOLUTE MAXIMUM RATINGS*
Junction Temperature Range, T
J
…..……………..….-40 C to +150 C
Storage Temperature Range, T
STORAGE ….
…….…….-65 C to +150 C
Lead Temperature Soldering: Reflow (Note
1)
..………..230 C Peak
ESD, Human Body Model ………………………………………………1.2kV
Note 1.
60 second maximum above 183 C
*The maximum package power dissipation must be observed.
地址: 南京市珠江路
88
号，新世界中心
B
座
4004
室, 邮编:210008
1
ADD.: RM. 4004,
BLOCK B,
NEW WORLD CENTER,
电话(TEL.):
(86)-25-68853600
NANJING 210008,
CHINA
传真(FAX):
(86)-25-68853600-810
WEB-SITE:
WWW.HN-ELEC.COM
NO. 88 ZHUJIANG ROAD,
1
HN [ NANJING HONANO ELECTRONIC CO., LTD. ]
