NCP1411 Datasheet, PDF (1/14 Pages) ON Semiconductor – Sync-Rect PFM Step-Up DC-DC Converter with Low-Battery Detector and Ring-Killer

NCP1411
Sync−Rect PFM Step−Up
DC−DC Converter with
Low−Battery Detector and
Ring−Killer
NCP1411 is a monolithic micropower high frequency Boost
(step−up) voltage switching converter IC specially designed for
battery operated hand−held electronic products up to 250 mA loading.
It integrates Synchronous Rectifier for improving efficiency as well as
eliminating the external Schottky Diode. High switching frequency
(up to 600 kHz) allows low profile inductor and output capacitor being
used. Low−Battery Detector, Logic−Controlled Shutdown and
Cycle−by−Cycle Current Limit provide value−added features for
various battery−operated applications. The innovative Ring−Killer
circuitry guarantees quiet operation in discontinuous conduction
mode. With all these functions ON, the device quiescent supply
current is only 9.0 mA typical. This device is available in the space
saving compact Micro8t package.
Features
• Pb−Free Package is Available
• High Efficiency, up to 92%
• Very Low Device Quiescent Supply Current of 9.0 mA Typical
• Built−in Synchronous Rectifier (P−FET) Eliminates One External
Schottky Diode
• High Switching Frequency (up to 600 kHz) Allows use of Small Size
Inductor
• High Accuracy Reference Output, 1.19 V $ 0.6% @ 25°C, can
supply more than 2.5 mA when V_OUT ≥ 3.3 V
• Ring−Killer for Quiet Operation in Discontinuous Conduction Mode
• 1.0 V Startup at No Load Guaranteed
• Output Voltage from 1.5 V to 5.5 V Adjustable
• Output Current up to 250 mA @ V_IN = 2.5 V, V_OUT = 3.3 V
• Logic−Controlled Shutdown
• Open Drain Low−Battery Detector Output
• 1.0 A Cycle by Cycle Current Limit
• Low Profile and Minimum External Parts
• Compact Micro8 Package
Typical Applications
• Personal Digital Assistant (PDA)
• Handheld Digital Audio Product
• Camcorder and Digital Still Camera
• Handheld Instrument
• Conversion from One or Two NiMH or NiCd, or One Li−ion Cell
to 3.3 V/5.0 V
http://onsemi.com
MARKING
DIAGRAM
8
1
Micro8
DM SUFFIX
CASE 846A
A2
AYW
A2 = Device Marking
A = Assembly Location
Y = Year
W = Work Week
PIN CONNECTIONS
FB 1
LBI/EN 2
LBO 3
REF 4
8 OUT
7 LX
6 GND
5 BAT
(Top View)
ORDERING INFORMATION
Device
Package
Shipping†
NCP1411DMR2
Micro8 4000 Tape & Reel
NCP1411DMR2G Micro8 4000 Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2004
1
October, 2004 − Rev. 3
Publication Order Number:
NCP1411/D