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
pin−to−pin compatible with LT1372/1373.
http://onsemi.com
SOIC−8
D SUFFIX
CASE 751
PIN CONNECTIONS AND
MARKING DIAGRAM
V
C
1
CS5171/3
517xx
ALYW
8
V
SW
PGND
AGND
V
CC
Part Number
CS5171
CS5172
CS5173
CS5174
Frequency
280 kHz
280 kHz
560 kHz
560 kHz
Feedback Voltage Polarity
positive
negative
positive
negative
FB
Test
SS
V
C
Test
NFB
SS
1
CS5172/4
517xx
ALYW
8
V
SW
PGND
AGND
V
CC
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
Pb−Free Packages are Available
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
mA
Maximum
Pin−to−Pin Compatible with LT1372/1373
Wide Temperature Range
♦
Industrial Grade: −40°C to 125°C
♦
Commercial Grade: 0°C to 125°C
x
x
A
L
Y
W
= 1, 2, 3, or 4
= E, G
= Assembly Location
= Wafer Lot
= Year
= Work Week
ORDERING INFORMATION
See detailed ordering and shipping information in the
package dimensions section on page 17 of this data sheet.
©
Semiconductor Components Industries, LLC, 2004
1
June, 2004 − Rev. 20
Publication Order Number:
CS5171/D
ONSEMI [ ON SEMICONDUCTOR ]
