CS5171 Datasheet, PDF (1/22 Pages) ON Semiconductor – 1.5 A 280 kHz/560 kHz Boost Regulators

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.
Part Number
CS5171
CS5172
CS5173
CS5174
Frequency
280 kHz
280 kHz
560 kHz
560 kHz
Feedback Voltage Polarity
positive
negative
positive
negative
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
http://onsemi.com
SOIC−8
D SUFFIX
CASE 751
PIN CONNECTIONS AND
MARKING DIAGRAM
1 ^CS5171/3 8
V_C
V_SW
FB
PGND
Test
AGND
SS
V_CC
CS5172/4
1
8
V_C
V_SW
Test
PGND
NFB
AGND
SS
V_CC
x
= 1, 2, 3, or 4
x
= E, G
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= 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