1.5A, 280kHz, Boost Regulator
FEATURES
• Integrated Power Switch 1.5A Guaranteed
• Wide Input Voltage Range 2.7V to 30V
• High Frequency Allows for Small Components
• Minimum External Components
• Easy External Synchronization
• Frequency Foldback Reduces Component
Stress During an Overcurrent Condition
• Thermal Shutdown with Hysteresis
• Shutdown Current is 50 uA Maximum
• Wide Ambient Temperature Range
• Moisture Sensitivity Level 3
LM5171
SOP-8 PKG
APPLICATION
• LCD Monitor/TV LED Backlight Driver
• TFT-LCD Power Management
ORDERING INFORMATION
Device
LM5171D
Package
SOP-8
DESCRIPSION
The LM5171 product is 280kHz switching regulator with a high efficiency, 1.5A integrated switch. This part
operates 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.
This IC utilizes 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.
ABSOLUTE MAXIMUM RATINGS
RATING
Junction Temperature Range
Storage Temperature Range
Thermal Resistance, Junction to Ambient
Thermal Resistance, Junction to Case
Lead Temperature (Soldering, 10 sec)
(Note 1)
SYMBOL
T
J
T
stg
R
θJA
R
θJC
-
VALUE
-40 to 125
-65 to 150
165
45
230
UNIT
℃
℃
℃
/W
℃
/W
℃
Note 1. 60 second maximum above 183°C.
* Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Maximum ratings applied to the device are
individual stress limit value and are not valid simultaneously. If the limits are exceeded, device functional operation is not implied, damage
may occur and reliability may be affected.
Ordering Information
Package
SOP-8
Order No.
LM5171D
1.5A, 280kHz
Description
Supply As
Reel
Status
Active
Dec. 2010 - Rev. 1.2.1
-
1
-
HTC
HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
