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LM51571RTER AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

LM51571RTER product

LM51571RTER

Voltage Regulators - DC DC Switching Regulators

50 V switchBoostSEPICFlybackWQFN-162.2 MHzPeak current mode

LM51571RTER is a compact 50 V integrated-switch controller for wide-input boost, SEPIC, and flyback supplies. It is suited to designs requiring programmable switching frequency and a 4.33 A minimum peak-current-limit grade.

Best for

  • Wide-input boost converters
  • SEPIC supplies
  • Flyback supplies using an integrated 50 V switch

Avoid if

  • The switch node can exceed 50 V including ringing
  • A synchronous converter is required
  • The required peak current exceeds the LM51571 current-limit range

Check before use

  • Confirm BIAS remains at or above 2.9 V for low-input operation
  • Validate duty-cycle capability at minimum input voltage
  • Measure SW-node ringing and verify thermal margin

Key specifications

Topology
Boost, SEPIC, flyback
BIAS input range
2.9 V to 45 V
Minimum supply after start-up
1.5 V with BIAS ≥ 2.9 V
Switching frequency
100 kHz to 2.2 MHz
Peak current limit
4.33 A minimum
SW voltage
48 V operating; 50 V absolute maximum
Package
WQFN-16, 3.0 mm × 3.0 mm × 0.8 mm max

Compliance & Environment

RoHS
Not applicable
REACH
-
MSL
Level-1-260C-UNLIM
ECCN
-
HTSUS
-

Application

Wide-input DC/DC conversionIndustrial bias suppliesBattery-powered boost supplies

Datasheet

sszt183

800 KB

Datasheet AI

CAD Models

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Alternative components

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Design and risk insights

Questions & answers

LM51571RTER is the 16-pin WQFN package option of Texas Instruments' LM51571 non-synchronous switching regulator. It integrates a 50 V N-channel MOSFET and supports boost, SEPIC, and flyback topologies.