Low Voltage Synchronous Buck Controller

Obsolete

Overview

The NCP1570 is a low voltage buck controller. It provides the control for a DC–DC power solution producing an output voltage as low as 0.985 V over a wide current range. The NCP1570–based solution is powered from 12 V with the output derived from a 5 V supply. It contains all required circuitry for a synchronous NFET buck regulator using the V2™ control method to achieve the fastest possible transient response and best overall regulation. The NCP1570 operates at a fixed internal 200 kHz frequency and is packaged in an SO–8.

The NCP1570 provides undervoltage lockout protection, Soft Start, Power Good with delay, and built–in adaptive non–overlap.

  • 0.985 V +/- 1.0% Reference
  • V2 Control Topology
  • 200 ns Transient Response
  • Programmable Soft Start
  • Power Good
  • Programmable Power Good Delay
  • 40 ns Gate Rise and Fall Times (3.3 nF Load)
  • 50 ns Adaptive FET Non–Overlap Time
  • Fixed 200 kHz Oscillator Frequency
  • Undervoltage Lockout
  • On/Off Control Through Use of the COMP Pin
  • Overvoltage Protection through Synchronous MOSFETs
  • Synchronous N–Channel Buck Design
  • Dual Supply, 12 V Control, 5 V Power Source

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CAD Models

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VCC Min (V)

VCC Max (V)

fSW Typ (kHz)

Reference Price

NCP1570D

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Obsolete

CAD Model

Pb

A

H

P

SOIC-8

1

235

TUBE

98

N

-

-

V2

11.4

12.6

200

Price N/A

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NCP1570DR2

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Obsolete

CAD Model

Pb

A

H

P

SOIC-8

1

235

REEL

2500

N

-

-

V2

11.4

12.6

200

Price N/A

More Details

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