NCP1442 Datasheet, PDF (1/20 Pages) ON Semiconductor – 4.0 A 280 kHz/560 kHz Boost Regulators

NCP1442, NCP1443,
NCP1444, NCP1445
4.0 A 280 kHz/560 kHz
Boost Regulators
The NCP1442/3/4/5 products are 280 kHz/560 kHz switching
regulators with a high efficiency, 4.0 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.
Part Number
NCP1442
NCP1443
NCP1444
NCP1445
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: 4.0 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
Applications
• Boost Converter
• Inverting Converter
• Distributed Power
• Portable Computers
• Battery Powered Systems
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2004
1
October, 2004 − Rev. 7
http://onsemi.com
1
7
PowerFLEX]
7−PIN
F SUFFIX
CASE 936J
1
7
7 LEAD, TO−220
T SUFFIX
CASE 821P
PIN CONNECTIONS AND
MARKING DIAGRAMS
NC
P144xF
AWLYWW
1
7
PowerFLEX
7−PIN
NC
P144xT
AWLYWW
1
7
7 LEAD, TO−220
NCP1442/4
Pin 1. V_C
2. FB
3. TEST
4. GND
5. V_SW
6. SS
7. V_CC
NCP1443/5
1. V_C
2. TEST
3. NFB
4. GND
5. V_SW
6. SS
7. V_CC
x = Device Number 2, 3, 4, or 5
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
Publication Order Number:
NCP1442/D