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.
1
Part Number
NCP1442
NCP1443
NCP1444
NCP1445
Frequency
280 kHz
280 kHz
560 kHz
560 kHz
Feedback Voltage Polarity
Positive
Negative
Positive
Negative
NC
P144xF
AWLYWW
NC
P144xT
AWLYWW
7
http://onsemi.com
1
7
PowerFLEX]
7−PIN
F SUFFIX
CASE 936J
7 LEAD, TO−220
T SUFFIX
CASE 821P
PIN CONNECTIONS AND
MARKING DIAGRAMS
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
1
7
PowerFLEX
7−PIN
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
x
A
WL
Y
WW
NCP1443/5
1. V
C
2. TEST
3. NFB
4. GND
5. V
SW
6. SS
7. V
CC
•
•
•
•
•
Boost Converter
Inverting Converter
Distributed Power
Portable Computers
Battery Powered Systems
= Device Number 2, 3, 4, or 5
= Assembly Location
= Wafer Lot
= Year
= Work Week
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
*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
Publication Order Number:
NCP1442/D
ONSEMI [ ON SEMICONDUCTOR ]
