LM5161PWPT

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> Semiconductors - ICs

> Power Management

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Details for Texas Instruments

LM5161PWPT

Wide Input 4.5-V to 100-V, 1-A Synchronous Buck / Fly-Buck Converter
Buy Directly from Texas Instruments (3494 in Stock)
$2.0700 per unit
Series Information for LM5161PWPT - Texas Instruments

Features

  • feature
    1-A Maximum Load Current
  • feature
    Adjustable Input UVLO and Hysteresis
  • feature
    CCM Option Supports Multi-Output Fly-Bucku2122
  • feature
    Constant ON-Time Control u2013 No External Loop Compensation u2013 Fast Transient Response
  • feature
    Frequency Adjustable Up to 1 MHz
  • feature
    Integrated High-Side and Low-Side Switches u2013 No Schottky Diode Required
  • feature
    Nearly Constant Switching Frequency
  • feature
    No External Ripple circuit needed (at FPWM = 0)
  • feature
    Peak Current Limiting Protection
  • feature
    Prebias Start-Up
  • feature
    Programmable Soft-Start Time
  • feature
    Selectable DCM Buck Operation at Light Load
  • feature
    Thermal Shutdown Protection
  • feature
    Wide 4.5-V to 100-V Input Voltage Range
  • feature
    u00b11% Feedback Voltage Reference

Description

DC/DC CONV SYNC BUCK/FLYBACK HTSSOP-14
The LM5161 is a 100-V, 1-A synchronous step-down converter with integrated high-side and low-side MOSFETs. The constant-ON-time control scheme requires no loop compensation and supports high step-down ratios with fast transient response. An internal feedback amplifier maintains ±1% output voltage regulation over the entire operating temperature range. The ON-time varies inversely with input voltage resulting in nearly constant switching frequency. Peak and valley current limit circuits protect against overload conditions. The undervoltage lockout (EN/UVLO) circuit provides independently adjustable input undervoltage threshold and hysteresis. The FPWM input pin in LM5161 selects either the forced continuous conduction mode (CCM) under all load levels or the discontinuous conduction mode (DCM) under light or no load conditions. When operating in forced CCM, the LM5161 supports the multiple output and isolated Fly-Buck applications. When programmed for the DCM operation, the LM5161 provides a tightly regulated buck output without any additional external feedback ripple injection circuit.

Specifications

Topology:
Synchronous Buck (Step Down) Flyback
Input Voltage Min:
4.5V
Input Voltage Max:
100V
No. of Outputs:
1Outputs
DC / DC Converter IC Case:
HTSSOP
No. of Pins:
14Pins
Output Current:
1A
Output Voltage Min:
2V
Output Voltage Max:
92V
Switching Frequency:
1MHz
Operating Temperature Max:
125°C
Product Range:
-
Automotive Qualification Standard:
-
RoHS Phthalates Compliant:
Yes
MSL:
MSL 3 - 168 hours
SVHC:
No SVHC (27-Jun-2018)

Alternate Descriptions

Avnet America

Conv DC-DC Single Buck/Flyback-Buck 4.5V 100V 14-Pin HTSSOP EP T/R

Avnet America product

Avnet Europe

Conv DC-DC Single Buck/Flyback-Buck 4.5V 100V 14-Pin HTSSOP EP T/R

Avnet Europe product

Texas Instruments

Wide Input 4.5-V to 100-V, 1-A Synchronous Buck / Fly-Buck Converter

Texas Instruments product