Top

Product details

Parameters

Vin (Min) (V) 3 Vin (Max) (V) 65 Vout (Min) (V) 1.23 Vout (Max) (V) 65 Iout (Max) (A) 0.15 Iq (Typ) (mA) 0.01 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 600 Features Adjustable Current Limit, Enable, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Synchronous Rectification, UVLO Adjustable Operating temperature range (C) -40 to 150 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

VSON (DRC) 10 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)

Features

  • Wide Input Voltage Range of 3 V to 65 V
  • 10.5-µA No-Load Quiescent Current
  • –40°C to 150°C Junction Temperature Range
  • Fixed (3.3-V, 5-V) or Adjustable Output Voltages
  • Meets EN55022 / CISPR 22 EMI Standards
  • Integrated 2-Ω PMOS Buck Switch
    • Supports 100% Duty Cycle for Low Dropout
  • Integrated 1-Ω NMOS Synchronous Rectifier
    • Eliminates External Rectifier Diode
  • Programmable Current Limit Setpoint (4 Levels)
  • Selectable PFM or COT Mode Operation
  • 1.223-V ±1% Internal Voltage Reference
  • 900-µs Internal or Programmable Soft Start
  • Active Slew Rate Control for Low EMI
  • Diode Emulation Mode and Pulse Skipping for Ultra-High Light-Load Efficiency Performance
  • Monotonic Start-Up into Prebiased Output
  • No Loop Compensation or Bootstrap Components
  • Precision Enable and Input UVLO With Hysteresis
  • Pin-to-pin Compatible With the LM5166
  • Thermal Shutdown Protection With Hysteresis
  • 10-Pin, 3-mm × 3-mm VSON Package
  • Create a Custom Regulator Design Using WEBENCH® Power Designer

All trademarks are the property of their respective owners.

open-in-new Find other Buck converters (integrated switch)

Description

The LM5165 device is a compact, easy-to-use, 3-V to 65-V, ultra-low IQ synchronous buck converter with high efficiency over wide input voltage and load current ranges. With integrated high-side and low-side power MOSFETs, up to 150-mA of output current can be delivered at fixed output voltages of 3.3 V or 5 V or at an adjustable output. The converter is designed to simplify implementation while providing options to optimize the performance for the target application. Pulse Frequency Modulation (PFM) mode is selected for optimal light-load efficiency or Constant On-Time (COT) control for nearly constant operating frequency. Both control schemes do not require loop compensation while providing excellent line and load transient response and short PWM on-time for large step-down conversion ratios.

The high-side P-channel MOSFET can operate at 100% duty cycle for lowest dropout voltage and does not require a bootstrap capacitor for gate drive. Also, the current limit setpoint is adjustable to optimize inductor selection for a particular output current requirement. Selectable and adjustable start-up timing options include minimum delay (no soft start), internally fixed (900 µs), and externally programmable soft start using a capacitor. An open-drain PGOOD indicator can be used for sequencing, fault reporting, and output voltage monitoring. The LM5165 buck converter is available in a 10-pin, 3-mm × 3-mm, thermally-enhanced VSON-10 package with 0.5-mm pin pitch.

open-in-new Find other Buck converters (integrated switch)
Download

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 16
Type Title Date
* Datasheet LM5165 3-V to 65-V Input, 150-mA Synchronous Buck Converter With Ultra-Low IQ datasheet (Rev. B) Jul. 12, 2017
Selection guides Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
White papers Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) Apr. 10, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes Powering Drones With a Wide VIN DC-DC Converter (Rev. A) Feb. 05, 2019
Application notes Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems Sep. 10, 2018
Technical articles Use a low-quiescent-current switcher for high-voltage conversion Aug. 27, 2018
Application notes Selecting an Ideal Ripple Generation Network for Your COT Buck Converter (Rev. A) Jun. 15, 2017
Application notes Low-EMI buck powers a multivariable sensor transmitter with BLE connectivity Oct. 24, 2016
Technical articles Powering smart sensor transmitters in industrial applications May 02, 2016
Application notes Low-IQ synchronous buck converter enables intelligent field-sensor applications Apr. 26, 2016
Technical articles DC/DC converter datasheets - Quiescent current demystified: Part two Apr. 11, 2016
User guides LM5165EVM-HD-C50X EVM User's Guide Jan. 27, 2016
User guides LM5165EVM-HD-P50A EVM User's Guide Apr. 21, 2015
Application notes Accurately measuring efficiency of ultralow-IQ devices Jan. 22, 2014
Application notes AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) Apr. 24, 2013

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
49
Description
The LM5165EVM-HD-C50X high density evaluation module (EVM) is designed to showcase the performance of the LM5165 high performance, exceptionally small, synchronous buck DC/DC buck converter with ultralow IQ. The module-style design is packaged in a miniature footprint with low component count. It (...)
Features
  • Tightly-regulated output voltage of 5 V with 2% setpoint accuracy
  • Wide input voltage operating range of 3 V to 65 V
  • Ultra-high power conversion efficiency: >90% at 5 V ouptut voltage and 150 mA load
  • No-load supply current as low as 12 μA
  • Fully assembled, tested and proven PCB layout with 15.5-mm x (...)
EVALUATION BOARDS Download
document-generic User guide
29
Description

The LM5165EVM-HD-P50A high density evaluation module (EVM) is designed to showcase the performance of the LM5165 high performance, exceptionally small, synchronous buck DC/DC buck converter with ultralow IQ. The module-style design is packaged in a miniature footprint with low component count. It (...)

Features
  • Tightly-regulated output voltage of 5 V with 2% setpoint accuracy, adjustable from 1.223 V to VIN
  • Wide input voltage operating range of 3 V to 65 V
  • Ultra-high power conversion efficiency: >90% at an output of 5 V and above 1 mA load (input voltage 12 V)
  • No-load supply current as low as 12 μA
  • Fully (...)

Design tools & simulation

SIMULATION MODELS Download
SNVMAH3B.ZIP (133 KB) - PSpice Model
SIMULATION MODELS Download
SNVMAJ5A.ZIP (95 KB) - PSpice Model
SIMULATION MODELS Download
SNVMAJ6A.ZIP (90 KB) - PSpice Model
SIMULATION MODELS Download
SNVMAK3A.ZIP (4 KB) - PSpice Model
SIMULATION MODELS Download
SNVMAK4A.ZIP (4 KB) - PSpice Model
SIMULATION MODELS Download
SNVMAK5B.ZIP (4 KB) - PSpice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
CALCULATION TOOLS Download
LM5165 DC/DC Converter Design Tool
LM5165DESIGN-CALC — Welcome to the LM5165 quickstart design tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck converter based on the LM5165 low IQ synchronous buck DC/DC regulator. As such, the user can expeditiously arrive at an optimized design to meet the (...)
Features
  • Determine filter inductance and input and output filter capacitances for a given operating mode (PFM or COT)
  • Optimize the design using efficiency and solution size as key performance metrics
  • Select components for soft-start, input UVLO, output voltage setpoint, current limit and switching frequency
  • (...)
CALCULATION TOOLS Download
SNVC195A.ZIP (3084 KB)

Reference designs

REFERENCE DESIGNS Download
8 Port IO-Link Master Reference Design
TIDA-010016 — PLC applications requiring fast timing and fast cycle time can now be realized using this reference design which implements, an eight-port IO-Link master. It can be used to build a remote IO gateway to connect to OPC UA, Profinet, EtherCAT or Ethernet IP. A PRU-based frame handler enables a very (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Non-isolated power architecture with diagnostics reference design for protection relay modules
TIDA-010055 — This reference design showcases non-isolated power supply architectures for protection relays with analog input/output and communication modules generated from 5-, 12-, or 24-V DC input. To generate the power supplies the design uses DC/DC converters with an integrated FET, a power module with an (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Connected LED Lighting With IEEE802.3bt Power Over Ethernet (PoE) Reference Design
TIDA-01463 — This Power over Ethernet (PoE) reference design supplies power and data over a single Ethernet cable to a connected LED lighting ballast. This reference design uses TI's TPS2372-4 PoE powered device (PD) interface, LM3409 buck controller, LM5165 buck converter, TPS62740 buck converter, TM4C1292NCPDT (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
LED-Lighting Control Reference Design for Machine Vision
TIDA-01081 — This LED lighting control reference design demonstrates a unique approach to drive and control a string of multiple high-power light-emitting diodes (LEDs). This reference design is targeted for industrial machine vision systems and is also suitable for other industrial or automotive lighting (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Wireless Mesh Network for Predictive Maintenance Reference Design
TIDA-01439 — This reference design can be used to quickly establish a wireless mesh network that connects various types of sensors directly to the Internet. Inputs like RS232, RS485 or RTD are on the board to collect data for predictive maintenance from different sensors and machines. For data processing a high (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
100-W, High-Resolution, 16-bit Color-Tunable, 0.15% Dimmable RGBW LED Luminaire Reference Design
TIDA-01415 — This reference design demonstrates the finest range of color control of individual RGBW LED strings with > 16 bits of PWM resolution while supporting the PWM modulation frequencies as high as 30 and 50 kHz. This reference design demonstrates the finest range of individual RGBW LED strings color (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
IO-Link With Digital Output and DC/DC Reference Design
TIDA-01478 — This reference design demonstrates the ability to have a high-density, IO-Link transceiver module, digital output (DO) (1) channel, and a DC-DC buck converter. With the DC-DC this module can power a wide array of external devices, such as microcontrollers (MCUs), sensors, displays, and more. IO-Link (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Field Transmitter with BLE Connectivity Powered from 4 to 20-mA Current Loop Reference Design
TIDA-00666 — The TIDA-00666 TI Design enables Bluetooth Low Energy (BLE) communication powered from a 2-wire 4- to 20-mA loop. For industrial process control instruments, analog 4- to 20-mA current loops are commonly used for analog signaling, with 4 mA representing the lowest end of the range and 20 mA the (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VSON (DRC) 10 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

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

Related videos