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reference designLTC3630A

Analog Devices LTC3630A

High Efficiency, 76V 500mA Synchronous Step-Down Converter

Overview

TopologyPositive to Negative Converter
Input voltage4-63 V
Output 1-12 V / 0.5 A
IC revisionD

Description

The LTC®3630A is a high efficiency step-down DC/DC converter with internal high side and synchronous power switches that draws only 12μA typical DC supply current while maintaining a regulated output voltage at no load.The LTC3630A can supply up to 500mA load current and features a programmable peak current limit that provides a simple method for optimizing efficiency and for reducing output ripple and component size. The LTC3630A’s combination of Burst Mode® operation, integrated powerswitches, low quiescent current, and programmable peak current limit provides high efficiency over a broad range of load currents.With its wide input range of 4V to 76V, the LTC3630A is a robust converter suited for regulating a wide variety of power sources. A feedback comparator output enables multiple LTC3630As to be paralleled in higher current applications.The LTC3630A is available in the thermally-enhanced 3mm × 5mm DFN and the MSE16 packages.

Features

  • Wide Operating Input Voltage Range: 4V to 76V
  • Synchronous Operation for Highest Efficiency
  • Internal High Side and Low Side Power MOSFETs
  • No Compensation Required
  • Adjustable 50mA to 500mA Maximum Output Current
  • Low Dropout Operation: 100% Duty Cycle
  • Low Quiescent Current: 12µA
  • Wide Output Range: 0.8V to VIN
  • 0.8V ±1% Feedback Voltage Reference
  • Precise RUN Pin Threshold
  • Internal and External Soft-Start
  • Programmable 1.8V, 3.3V, 5V or Adjustable Output
  • Few External Components Required
  • Low Profile (0.75mm) 3mm × 5mm DFN and Thermally-Enhanced MSE16 Packages

Typical applications

  • Portable Instruments
  • Industrial Control Supplies
  • Automotive
  • Medical Devices
  • Avionics

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
fres(MHz)
VOP(V)
Mount
ISAT(A)
RDC max.(mΩ)
Size
Version
SamplesAvailability & Sample
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7447714220
SPECWE-PD SMT Power Inductor, 22 µH, –
Simu­lation
Availability
–
Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PD SMT Power Inductor
Inductance22 µH
–
–
DC Resistance42 mΩ
Self Resonant Frequency14.5 MHz
Operating Voltage120 V
MountSMT 
Saturation Current3.6 A
DC Resistance50 mΩ
Size1050 
VersionPerformance 
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74438356220
SPECWE-MAPI SMT Power Inductor, 22 µH, 1.85 A

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
–
Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance22 µH
Performance Rated Current1.85 A
Saturation Current @ 30%2.45 A
DC Resistance250 mΩ
Self Resonant Frequency11 MHz
Operating Voltage80 V
MountSMT 
Saturation Current1.85 A
DC Resistance280 mΩ
Size4020 
–
–Check availability