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Step-down (buck) regulators
Buck modules (integrated inductor)

LMZ21701

ACTIVE

3V to 17V, 1A Step-Down DC/DC Power Module in 3.5mm × 3.5mm Package

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Data sheet

LMZ21701

ACTIVE
Data sheet Order now

Product details

Iout (Max) (A) 1 Vin (Min) (V) 3 Vin (Max) (V) 17 Vout (Min) (V) 0.9 Vout (Max) (V) 6 Soft start Adjustable Features EMI Tested, Enable, Light Load Efficiency, Power Good Operating temperature range (C) -40 to 125 Iq (Typ) (uA) 17 Regulated outputs (#) 1 Switching frequency (Max) (kHz) 2500 Switching frequency (Min) (kHz) 1250 Duty cycle (Max) (%) 100 Topology Buck, Synchronous Buck
Iout (Max) (A) 1 Vin (Min) (V) 3 Vin (Max) (V) 17 Vout (Min) (V) 0.9 Vout (Max) (V) 6 Soft start Adjustable Features EMI Tested, Enable, Light Load Efficiency, Power Good Operating temperature range (C) -40 to 125 Iq (Typ) (uA) 17 Regulated outputs (#) 1 Switching frequency (Max) (kHz) 2500 Switching frequency (Min) (kHz) 1250 Duty cycle (Max) (%) 100 Topology Buck, Synchronous Buck
  • Integrated Inductor
  • Miniature 3.5 mm × 3.5 mm × 1.75 mm Package
  • 35-mm² Solution Size (Single Sided)
  • -40°C to 125°C Junction Temperature Range
  • Adjustable Output Voltage
  • Integrated Compensation
  • Adjustable Soft-Start Function
  • Starts into Prebiased Loads
  • Power Good and Enable Pins
  • Seamless Transition to Power-Save Mode
  • Up to 1000 mA Output Current
  • Input Voltage Range 3 V to 17 V
  • Output Voltage Range 0.9 V to 6 V
  • Efficiency up to 95 %
  • 1.5-µA Shutdown Current
  • 17-µA Quiescent Current
  • Create a Custom Design Using the LMZ21701 With WEBENCH® Power Designer
  • Integrated Inductor
  • Miniature 3.5 mm × 3.5 mm × 1.75 mm Package
  • 35-mm² Solution Size (Single Sided)
  • -40°C to 125°C Junction Temperature Range
  • Adjustable Output Voltage
  • Integrated Compensation
  • Adjustable Soft-Start Function
  • Starts into Prebiased Loads
  • Power Good and Enable Pins
  • Seamless Transition to Power-Save Mode
  • Up to 1000 mA Output Current
  • Input Voltage Range 3 V to 17 V
  • Output Voltage Range 0.9 V to 6 V
  • Efficiency up to 95 %
  • 1.5-µA Shutdown Current
  • 17-µA Quiescent Current
  • Create a Custom Design Using the LMZ21701 With WEBENCH® Power Designer

The LMZ21701 nano module is an easy-to-use step-down DC/DC solution capable of driving up to 1000-mA load in space-constrained applications. Only an input capacitor, an output capacitor, a soft-start capacitor, and two resistors are required for basic operation.

The LMZ21701 nano module is an easy-to-use step-down DC/DC solution capable of driving up to 1000-mA load in space-constrained applications. Only an input capacitor, an output capacitor, a soft-start capacitor, and two resistors are required for basic operation.

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Technical documentation

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Type Title Date
* Data sheet LMZ21701 1-A Nano Module With 17-V Maximum Input Voltage datasheet (Rev. E) 29 Aug 2018
User guide LMZ21700 and LMZ21701 Power Module Evaluation Module User's Guide (Rev. B) 10 Jan 2022
Application note Soldering Considerations for Power Modules (Rev. B) 17 May 2021
Application note Practical Thermal Design With DC/DC Power Modules (Rev. A) 20 Nov 2019
White paper Benefits and trade-offs of various power-module package options 02 Aug 2017
Technical article SIMPLE SWITCHER® 25th anniversary 02 Feb 2015
User guide LMZ21701/LMZ21700 SIMPLE SWITCHER Nano Module Eval Board 05 Oct 2012
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 Jul 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) 03 May 2004

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LMZ21701EVM — LMZ21701 1A SIMPLE SWITCHER® Nano Module Evaluation Board

The LMZ21701 SIMPLE SWITCHER® nano module is an easy-to-use DC-DC solutions optimized for space constrained applications. The LMZ21701 EVM is capable of delivering up to 1A load with excellent power conversion efficiency, output voltage accuracy, line and load regulation and load transient (...)

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Simulation model

LMZ21701 PSpice Unencrypted Transient Model (Rev. A)

SNVM538A.ZIP (600 KB) - PSpice Model
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Simulation model

LMZ21701 Unencrypted PSpice Transient Model

SNVM774.ZIP (6 KB) - PSpice Model
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Simulation model

LMZ21701 TINA-TI Reference Design

SNVM989.TSC (183 KB) - TINA-TI Reference Design
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Simulation model

LMZ21701 TINA-TI Transient Spice Model

SNVM990.ZIP (57 KB) - TINA-TI Spice Model
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Reference designs

TIDA-010008 — Flat-Clamp TVS based Reference Design for Protection Against Transient for Grid Applications

This reference design features multiple approaches for  protecting AC or DC analog input, DC analog output, AC or DC binary input, digital output with a high side or low side driver, LCD bias supply, USB interfaces (power and data) and onboard power supplies with 24, 12 or 5V input used in (...)
document-generic Schematic
Reference designs

PMP4435 — 48Vin, 300W 1/8brick Digital Module with GaN FET Reference Design

The PMP4435 is a DC-DC isolated digital module with GaN mosfet reference design targeted for industrial and telecom applications. The DC input range is 36V-60V, with 12V typical and the output is 12V/5A. An digital controller UCD3138A is used in the design. The efficiency is up to 95.8% with good (...)
document-pdfAcrobat Schematic
Reference designs

PMP10630 — Xilinx Kintex UltraScale XCKU040 FPGA Power Solution, 6W Reference Design

The PMP10630 reference design is a complete high density power solution for Xilinx® Kintex® UltraScale™ XCKU040 FPGA. This design uses an optimal combination of SIMPLE SWITCHER® modules and LDOs to provide all the necessary voltage rails in a small solution size of 36 x 43 mm (1.4 (...)
document-pdfAcrobat Schematic
Reference designs

PMP10618 — 15V to 60V Wide Input Four-Output SIMPLE SWITCHER® Reference Design Using LM46002 and LMZ21701

This reference design demonstrates the wide input voltage capability and small solution size of the LM46002 SIMPLE SWITCHER® Synchronous Buck Converter and the LMZ21701 SIMPLE SWITCHER® Nano Module. The LM46002 provides a regulated 12V rail from an input of 15V to 60V. The 12V rail is then (...)
document-pdfAcrobat Schematic
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