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IC manufacturers Monolithic Power Systems

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reference designNB621

Monolithic Power Systems NB621

8A, 25V, 600kHz Synchronous Step-Down Converter with Integrated LDO

Overview

TopologyBuck Converter
Input voltage5.5-25 V
Output 13.3 V
IC revision0.9

Description

The NB621 is a high frequency synchronous rectified step-down switch mode converter with a built in internal high side power MOSFET and integrated LDO. It offers a very compact solution to achieve 8A continuous output current over a wide input, load and line range.

Current mode operation provides fast transient response and eases loop stabilization.

Full protection features include OCP and thermal shut down.

The NB621 requires a minimum number of readily available standard external components and is available in a space saving 4mm x 5mm 28-pin QFN package.

Features

  • -Wide 5.5V to 25V Operating Input Range
  • -8A Output Current
  • -Internal Low RDSON Power MOSFETs
  • -Fixed 600kHz switching frequency
  • -Sync from 300kHz to 2MHz External Clock
  • -Integrated 100mA LDO
  • -Internal Compensation
  • -Power Good Output
  • -Integrated Bootstrap Diode
  • -OCP Protection and Thermal Shutdown
  • -Output Adjustable from 0.8V to 15V
  • -Available in 4mm x 5mm 28-pin QFN package.

Typical applications

  • Networking Systems
  • Digital Set Top Boxes
  • Notebook Systems and I/O Power
  • Personal Video Recorders
  • Distributed Power Systems
  • Flat Panel Television and Monitors

More information

Products

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Data­sheet
Simu­lation
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Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Qty.
SamplesAvailability & Sample
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7443551200
SPECWE-HCI SMT Flat Wire High Current Inductor, 2 µH, 26.5 A
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Downloads9 files

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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance2 µH
Performance Rated Current26.5 A
Saturation Current @ 10%9 A
Saturation Current @ 30%22 A
DC Resistance2.6 mΩ
Self Resonant Frequency45 MHz
MaterialWE-PERM 
Packaging Unit400 
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