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16-WQFN
Integrated Circuits (ICs)

LM51571RTER

Active
Texas Instruments

6A/4A, 50-V, 2.2-MHZ WIDE VIN BOOST, FLYBACK, & SEPIC CONVERTER WITH DUAL RANDOM SPREAD SPECTRUM

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Search across all available documentation for this part.

DocumentsDatasheetHow to Design a Boost Converter Using LM5157x, LM5158x+8
16-WQFN
Integrated Circuits (ICs)

LM51571RTER

Active
Texas Instruments

6A/4A, 50-V, 2.2-MHZ WIDE VIN BOOST, FLYBACK, & SEPIC CONVERTER WITH DUAL RANDOM SPREAD SPECTRUM

Deep-Dive with AI

DocumentsDatasheetHow to Design a Boost Converter Using LM5157x, LM5158x+8

Technical Specifications

Parameters and characteristics for this part

SpecificationLM51571RTER
Current - Output4.33 A
Frequency - Switching [Max]2.2 MHz
Frequency - Switching [Min]100 kHz
FunctionStep-Up, Step-Up/Step-Down
GradeAutomotive
Mounting TypeSurface Mount
Number of Outputs1
Operating Temperature [Max]125 ¯C
Operating Temperature [Min]-40 °C
Output ConfigurationPositive
Output TypeAdjustable
Package / Case16-WFQFN Exposed Pad
QualificationAEC-Q200
Supplier Device Package16-WQFN (3x3)
Synchronous RectifierFalse
TopologyFlyback, SEPIC, Boost
Voltage - Input (Max) [Max]45 V
Voltage - Input (Min) [Min]2.9 V
Voltage - Output (Max) [Max]48 V
Voltage - Output (Min/Fixed)1.5 V

LM51571-Q1 Series

6A/4A, 50-V, 2.2-MHz wide VIN boost, flyback, & SEPIC converter with dual random spread spectrum

PartFrequency - SwitchingOutputs and TypeOutputs and TypeRegulator TopologySupplied ContentsUtilized IC / PartBoard TypeMain PurposeVoltage - Input [Max]Voltage - Input [Min]Voltage - OutputCurrent - OutputSynchronous RectifierGradeOperating Temperature [Min]Operating Temperature [Max]Number of OutputsOutput TypeFunctionSupplier Device PackageVoltage - Input (Min) [Min]Voltage - Input (Max) [Max]Package / CaseOutput ConfigurationTopologyMounting TypeQualificationVoltage - Output (Max) [Max]Frequency - Switching [Min]Frequency - Switching [Max]Voltage - Output (Min/Fixed)
LM5157EVM-BST
Texas Instruments
LM5157EVM-BST
2.1 MHz
Non-Isolated
1
Boost
Board(s)
LM5157
Fully Populated
DC/DC
Step Up
9 VDC
3 V
12 V
1.6 A
16-WQFN
Texas Instruments
LM51571RTER
4.33 A
Automotive
-40 °C
125 ¯C
1
Adjustable
Step-Up
Step-Up/Step-Down
16-WQFN (3x3)
2.9 V
45 V
16-WFQFN Exposed Pad
Positive
Boost
Flyback
SEPIC
Surface Mount
AEC-Q200
48 V
100 kHz
2.2 MHz
1.5 V
16-WQFN
Texas Instruments
LM51571QRTERQ1
4.33 A
Automotive
-40 °C
150 °C
1
Adjustable
Step-Up
Step-Up/Step-Down
16-WQFN (3x3)
1.5 V
45 V
16-WFQFN Exposed Pad
Positive
Boost
Flyback
SEPIC
Surface Mount
AEC-Q100
48 V
100 kHz
2.2 MHz
1.5 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

DistributorPackageQuantity$
DigikeyCut Tape (CT) 1$ 3.48
10$ 3.13
25$ 2.95
100$ 2.56
250$ 2.43
500$ 2.18
1000$ 1.84
Digi-Reel® 1$ 3.48
10$ 3.13
25$ 2.95
100$ 2.56
250$ 2.43
500$ 2.18
1000$ 1.84
Tape & Reel (TR) 3000$ 1.75
Texas InstrumentsLARGE T&R 1$ 2.63
100$ 2.30
250$ 1.61
1000$ 1.30

Description

General part information

LM51571-Q1 Series

The LM5157 device is a wide input range, non-synchronous boost converter with integrated 50-V power switch.

The device can be used in boost, SEPIC, and flyback topologies. The device can start up from a single-cell battery with a minimum of 2.9 V. It can operate with an input supply voltage as low as 1.5 V if the BIAS pin is greater than 2.9 V.

The BIAS pin operates up to 45 V (50-V absolute maximum). The switching frequency is dynamically programmable with an external resistor from 100 kHz to 2.2 MHz. Switching at 2.2 MHz minimizes AM band interference and allows for a small solution size and fast transient response. To reduce the EMI of the power supply, the device provides a selectable Dual Random Spread Spectrum, which reduces the EMI over a wide frequency range.