NCP1450A ON, NCP1450A Datasheet
NCP1450A
Manufacturer Part Number
NCP1450A
Description
PWM Step-up DC-DC Controller
Manufacturer
ON
Datasheet
1.NCP1450A.pdf
(24 pages)
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NCP1450A
PWM Step−up DC−DC
Controller
controller that are specially designed for powering portable equipment
from one or two cells battery packs. The NCP1450A series have a
driver pin, EXT pin, for connecting to an external transistor. Large
output currents can be obtained by connecting a low ON-resistance
external power transistor to the EXT pin. The device will
automatically skip switching cycles under light load condition to
maintain high efficiency at light loads. With only six external
components, this series allows a simple means to implement highly
efficient converter for large output current applications.
oscillator, PWM controller, phase- compensated error amplifier,
soft-start, voltage reference, and driver for driving external power
transistor. Additionally, a chip enable feature is provided to power
down the converter for extended battery life.
with five standard regulated output voltages. Additional voltages that
range from 1.8 V to 5.0 V in 100 mV steps can be manufactured.
Features
Typical Applications
April, 2003 - Rev. 5
The NCP1450A series are PWM step-up DC-DC switching
Each device consists of an on-chip PWM (Pulse Width Modulation)
The NCP1450A device series are available in the TSOP-5 package
Accuracy 2.5%
(3.0 V version at V
High Efficiency 86% at I
Low Start-up Voltage of 0.9 V typical at I
Operation Down to 0.6 V
Five Standard Voltages: 1.9 V, 2.7 V, 3.0 V, 3.3 V, 5.0 V with High
Low Conversion Ripple
High Output Current up to 1000 mA
Fixed Frequency Pulse Width Modulation (PWM) at 180 kHz
Chip Enable Pin with On-chip 150 nA Pull-up Current Source
Low Profile and Micro Miniature TSOP-5 Package
Personal Digital Assistant (PDA)
Electronic Games
Portable Audio (MP3)
Digital Still Cameras
Handheld Instruments
Semiconductor Components Industries, LLC, 2003
88% at I
IN
= 2.0 V, L = 10 mH, C
O
O
= 200 mA, V
= 400 mA, V
IN
IN
O
= 3.0 V, V
= 2.0 V, V
OUT
= 1.0 mA
= 220 mF)
OUT
OUT
= 5.0 V
= 3.0 V
1
See detailed ordering and shipping information in the ordering
information section on page 3 of this data sheet.
ORDERING INFORMATION
OUT
PIN CONNECTIONS AND
NC
CE
MARKING DIAGRAM
http://onsemi.com
xxx = Marking
Y
W
1
2
3
SN SUFFIX
CASE 483
(Top View)
5
TSOP-5
= Year
= Work Week
Publication Order Number:
1
5
4
EXT
GND
NCP1450A/D
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