Home Power management DC/DC switching regulators Step-down (buck) regulators Buck modules (integrated inductor)
Home
Power management
DC/DC switching regulators
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

Order now
Data sheet

A newer version of this product is available

open-in-new Compare products
Same functionality with different pin-out to the compared device.
NEW TPSM82903 ACTIVE 3-V to 17-V, 3-A, high-efficiency, low-IQ synchronous buck converter module with integrated inductor Higher efficiency with higher current, lower IQ, output discharge, and tracking in a smaller package.

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) (mA) 0.017 Regulated outputs (#) 1 Switching frequency (max) (kHz) 2500 Switching frequency (min) (kHz) 1250 Duty cycle (max) (%) 100 Topology Buck, Synchronous Buck Type Module Rating Catalog Control mode Constant on-time (COT), DCS-Control
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) (mA) 0.017 Regulated outputs (#) 1 Switching frequency (max) (kHz) 2500 Switching frequency (min) (kHz) 1250 Duty cycle (max) (%) 100 Topology Buck, Synchronous Buck Type Module Rating Catalog Control mode Constant on-time (COT), DCS-Control
USIP (SIL) 8 —
  • 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.

open-in-new Find other Buck modules (integrated inductor)
Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 9
Type Title Date
* Data sheet LMZ21701 1-A Nano Module With 17-V Maximum Input Voltage datasheet (Rev. E) PDF | HTML 29 Aug 2018
User guide LMZ21700 and LMZ21701 Power Module Evaluation Module User's Guide (Rev. B) PDF | HTML 10 Jan 2022
More literature Soldering Considerations for Power Modules (Rev. B) PDF | HTML 17 May 2021
More literature Practical Thermal Design With DC/DC Power Modules (Rev. A) 20 Nov 2019
More literature 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
More literature 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 (...)

User guide: PDF | HTML
Not available on TI.com
Simulation model

LMZ21701 PSpice Unencrypted Transient Model (Rev. A)

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

LMZ21701 TINA-TI Reference Design

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

LMZ21701 TINA-TI Transient Spice Model

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

LMZ21701 Unencrypted PSpice Transient Model

SNVM774.ZIP (6 KB) - PSpice Model
Download
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 (...)
Request
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 (...)
Design guide: PDF
Schematic: PDF
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 (...)
Test report: PDF
Schematic: PDF
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 (...)
Test report: PDF
Schematic: PDF
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 (...)
Test report: PDF
Schematic: PDF
Package Pins Download
USIP (SIL) 8 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos