NCP1550D ON, NCP1550D Datasheet
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NCP1550D
Manufacturer Part Number
NCP1550D
Description
600 kHz PWM/PFM Step-Down DC-DC Controller
Manufacturer
ON
Datasheet
1.NCP1550D.pdf
(18 pages)
NCP1550
600 kHz PWM/PFM
Step−Down DC−DC
Controller
voltage mode step−down controller IC, specially designed for battery
operated hand−held electronic products. With appropriate external
P−type MOSFET, the device can provide up to 2.0 A loading
current with high conversion efficiency. The device operates in
Constant−Frequency PWM mode at normal operation, that ensures
low output ripple noise, and which will automatically switch to PFM
mode at low output loads for higher efficiency. Additionally,
value−added features of Chip Enable to reduce IC Off−State current
and integrated feedback resistor network, make it the best choice for
portable applications. The device is designed to operate for voltage
regulation with minimum external components and board space. This
device is available in a TSOP−5 package with six standard output
voltage options.
Features
Typical Applications
September, 2004 − Rev. 6
The NCP1550 is a monolithic micropower high frequency
No Load)
$2.0%
3.3 V/1.8 V
Pb−Free Packages are Available
High Efficiency 92%, Typical
Low Quiescent Bias Current of 50 mA (Typical at PFM Mode with
Output Voltage Options from 1.8 V to 3.3 V with High Accuracy
Low Output Voltage Ripple, 50 mV, Typical
PWM Switching Frequency at 600 kHz
Automatic PWM/PFM Switchover at Light Load Condition
Very Low Dropout Operation, 100% Max. Duty Cycle
Chip Enable Pin with On−Chip 150 nA Pullup Current Source
Low Shutdown Current, 0.3 mA, Typical
Input Voltage Range from 2.45 V to 5.5 V
Built−in Soft−Start
Internal Undervoltage Lockout (UVLO) Protection
Low Profile and Minimum External Components
Micro Miniature TSOP−5 Package
Personal Digital Assistant (PDA)
Camcorders and Digital Still Camera
Hand−Held Instrument
Distributed Power System
Computer Peripheral
Conversion from Four NiMH or NiCd or One Lithium−ion Cells to
Semiconductor Components Industries, LLC, 2004
1
See detailed ordering and shipping information in the package
dimensions section on page 16 of this data sheet.
5
1
V
GND
ORDERING INFORMATION
OUT
CE
PIN CONNECTIONS
http://onsemi.com
1
2
3
xxx = Device Code
Y
W
SN SUFFIX
CASE 483
TSOP−5
(Top View)
= Year
= Work Week
Publication Order Number:
4
5
MARKING
DIAGRAM
V
EXT
xxxYW
IN
NCP1550/D