Name: Boost Converter, Sync-Rect, PFM, DC-DC, 800 mA, with True-Cutoff and Ring-Killer
Brand: Boost Converter, Sync-Rect, PFM, DC-DC, 800 mA, with True-Cutoff and Ring-Killer
SKU: NCP1422

Boost Converter, Sync-Rect, PFM, DC-DC, 800 mA, with True-Cutoff and Ring-Killer

Overview

NCP1422 is a monolithic micropower high frequency step-up switching converter IC specifically designed for battery-operated hand-held electronic products up to 800mA loading. It integrates Sync-Rect to improve efficiency and to eliminate the external Schottky Diode. High switching frequency (up to 1.2 MHz) allows for a low profile, small-sized inductor and output capacitor to be used. When the device is disabled, the internal conduction path from LX or BAT to OUT is fully blocked and the OUT pin is isolated from the battery. This True-Cutoff function reduce the shutdown current to typically only 50nA. Ring-Killer is also integrated to eliminate the high-frequency ringing in discontinuous conduction mode. In addition to the above, Low-Battery Detector, Logic-Controlled Shutdown, Cycle-by-Cycle Current Limit and Thermal Shutdown provide value-added features for various battery-operated applications. With all these functions ON, the quiescent supply current is typical only 8.5 uA. This device is available in compact and low profile DFN10 package.

Applications

Personal Digital Assistants (PDA)
Handheld Digital Audio Products
Camcorders and Digital Still Cameras
Conversion from one to two Alkaline, NiMH, NiCd battery cells to 3.0-5.0V or one Lithium-ion cells to 5.0V
While LED Flash for Digital Cameras

Features

Output Current up to 800 mA at VIN = 2.5 V and VOUT = 3.3 V
High Switching Frequency, up to 1.2MHz
Anti-Ringing Ring-Killer for Discontinuous Conduction Mode
Low Quiescent Current of 8.5 µA
1.0V Startup at No Load Guaranteed
Output Voltage from 1.5V to 5V Adjustable
1.5A Cycle by Cycle Current Limit
On Chip Thermal Shutdown with Hysteresis
Housed in Space-Saving and Low Profile DFN10 package
Pb-Free Package is Available

Material Composition

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Reference Price

NCP1422MNR2G

Active

DFN-10

485C

260

REEL

3000

Step-Up

Current/Voltage Mode

5.5

1.5 to 5.0

0.8

Up to 94

1200

$0.6127

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Converters | NCP1422

Boost Converter, Sync-Rect, PFM, DC-DC, 800 mA, with True-Cutoff and Ring-Killer

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