Synchronous Buck Converter, 1 MHz, 2.0 A

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Overview

The NCP1597B is a fixed 1 MHz, high-output-current, synchronous PWM converter that integrates a low-resistance, high-side P-channel MOSFET and a low-side N-channel MOSFET. The NCP1597B utilizes current mode control to provide fast transient response and excellent loop stability. It regulates input voltages from 4.0 V to 5.5 V down to an output voltage as low as 0.8 V and is able to supply up to 2 A. The NCP1597B has features including fixed internal switching frequency (FSW), and an internal soft-start to limit inrush current. Using the EN pin, shutdown supply current is reduced to 3 µA maximum. Other features include cycle-by-cycle current limiting; short-circuit protection, low dropout mode, power saving mode and thermal shutdown. The part is also offered in a 6-pin 3x3mm DFN package under the NCP1597A.

  • +5V DC-DC Regulator
  • Set-Top-Box
  • LCD-TV / DTV / Plasma TV
  • USB Powered Devices
  • Input Voltage Range: from 4.0 V to 5.5 V
  • Internal 140 mΩ HighSide Switching P-FET and 90 mΩ Low-Side N-FET
  • Fixed 1 MHz Switching Frequency
  • Cycle-by-Cycle Current Limiting
  • Overtemperature Protection
  • Start-up with Pre-Biased Output Load
  • 0.8 V +/- 1.5% Reference Voltage
  • Power Saving Mode During Light Load

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NCP1597BMNTWG

Active

Pb

A

H

P

DFN-10

1

260

REEL

3000

Y

Step-Down

Current Mode

4

5.5

0.8

2

90

1000

$0.3084

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