
Semiconductor Components Industries, LLC, 2006
October, 2006 Rev. 22
1
Publication Order Number:
CS5171/D
CS5171, CS5172, CS5173,
CS5174
1.5 A 280 kHz/560 kHz
Boost Regulators
The CS5171/2/3/4 products are 280 kHz/560 kHz switching
regulators with a high efficiency, 1.5 A integrated switch. These parts
operate over a wide input voltage range, from 2.7 V to 30 V. The
flexibility of the design allows the chips 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 controls
for either positive or negative voltage regulation. These parts are
pintopin compatible with LT1372/1373.
Part Number
Frequency
Feedback Voltage Polarity
CS5171
280 kHz
positive
CS5172
280 kHz
negative
CS5173
560 kHz
positive
CS5174
560 kHz
negative
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
Regulates Either Positive or Negative Output Voltages
Shut Down Current: 50 A Maximum
PintoPin Compatible with LT1372/1373
Wide Temperature Range
Industrial Grade: 40
°
C to 125
°
C
Commercial Grade: 0
°
C to 125
°
C
PbFree Packages are Available
517xy
= Device Code
x= 1, 2, 3, or 4
y= E, G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= PbFree Package
A
L
Y
W
ORDERING INFORMATION
See detailed ordering and shipping information in the
package dimensions section on page 20 of this data sheet.
CS5171/3
CS5172/4
SOIC8
D SUFFIX
CASE 751
V
CC
SS
1
5
A
8
AGND
Test
PGND
FB
V
SW
V
C
MARKING DIAGRAM AND
PIN CONNECTIONS
V
CC
SS
1
5
A
8
AGND
NFB
PGND
Test
V
SW
V
C
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