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Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 65 Switching frequency (Max) (kHz) 1000 Soft start Adjustable Features Enable, Light Load Efficiency, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (C) -40 to 125 Topology Buck open-in-new Find other Flybuck converters

Package | Pins | Size

HTSSOP (PWP) 14 32 mm² 5 x 6.4 open-in-new Find other Flybuck converters

Features

  • AEC-Q100 Qualified for Automotive Applications
    • Temperature Grade 1: –40°C ≤ TA ≤ 125°C
    • HBM ESD Classification Level 2
    • CDM ESD Classification Level C5
  • Wide 4.5-V to 65-V Input Voltage Range
  • Integrated High-Side and Low-Side Switches
    • No External Schottky Diode Required
  • 2-A Maximum Load Current
  • Meets CISPR 25 EMI Standard
  • Adaptive Constant On-Time Control
    • No External Loop Compensation
    • Fast Transient Response
  • Selectable Forced PWM or DCM Operation
    • FPWM Supports Multi-Output Fly-Buck™
  • Nearly Constant Switching Frequency
    • Resistor Adjustable up to 1 MHz
  • Programmable Soft-Start Time
  • Prebiased Start-Up
  • ±1% Feedback Voltage Reference
  • Inherent Protection Features for Robust Design
    • Peak Current Limiting Protection
    • Adjustable Input UVLO and Hysteresis
    • VCC and Gate Drive UVLO Protection
    • Thermal Shutdown Protection With Hysteresis
  • 14-Pin HTSSOP Package, 0.65-mm Pitch
  • Create a Custom Design Using the LM5160-Q1 With the WEBENCH® Power Designer

All trademarks are the property of their respective owners.

open-in-new Find other Flybuck converters

Description

The LM5160-Q1 is a 65-V, 2-A synchronous step-down converter with integrated high-side and low-side MOSFETs. The adaptive constant on-time control scheme requires no loop compensation and supports high step-down ratios with fast transient response. An internal feedback amplifier maintains ±1% output voltage regulation over the entire operating temperature range. The on-time varies inversely with input voltage resulting in nearly constant switching frequency.

Peak and valley current limit circuits protect against overload conditions. The undervoltage lockout (EN/UVLO) circuit provides independently adjustable input undervoltage threshold and hysteresis. The LM5160-Q1 is programmed through the FPWM pin to operate in continuous conduction mode (CCM) from no load to full load or to automatically switch to discontinuous conduction mode (DCM) at light load for higher efficiency. Forced CCM operation supports multiple-output and isolated Fly-Buck applications using a coupled inductor.

The LM5160-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in 14-pin HTSSOP package with 0.65-mm pin pitch.

open-in-new Find other Flybuck converters
Download

Technical documentation

Design & development

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

Hardware development

EVALUATION BOARD Download
49
Description

 

The LM5160DNTBKEVM evaluation board provides a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 5V output over an input range of 10V to 60V. The circuit delivers load currents to 1.5A. The application schematic is setup up to (...)

Features
  • 10V to 60V input voltage range
  • 5V target output voltage
  • Delivers up to 1.5A output load current
  • FET place holder for EN/UVLO shutdown feature
  • PWM mode pin feature to choose between CCM and DCM
EVALUATION BOARD Download
49
Description

The LM5160DNTFBK evaluation module is designed to operate from a 24V nominal bus with an input voltage range of 18V to 32V.  It is capable of supplying 12V/400 mA to the load at the isolated output.  The nominal switching frequency is 300kHz.  The high side and low side MOSFETs are integrated in the (...)

Features
  • 18V to 32V input voltage range
  • 8V target primary output voltage and 12V secondary isolated output
  • Can deliver up to 400mA output secondary load with primary unloaded
  • FPWM pin connected directly to Vcc

Design tools & simulation

SIMULATION MODEL Download
SNVM692.ZIP (92 KB) - PSpice Model
SIMULATION MODEL Download
SNVM965.ZIP (3 KB) - PSpice Model
CALCULATION TOOL Download
Fly-Buck and Flyback Topology Selector
FLYBUCK-FLYBACK-DESIGN-CALC This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
Features
  • Features isolated topologies like Fly-Buck™, Fly-Buck-Boost, DCM and CCM Flyback
  • Capability to design up to 6 isolated outputs
  • Recommends ICs for desired application design
  • Incorporates loop compensation in designs
  • Compares efficiency, external component count and transformer currents for every topology (...)
CALCULATION TOOL Download
LM5160 Buck Regulator Quick Start Calculator
LM5160DNTBK-CALC Welcome to the LM5160 Buck Regulator Quick Start Design Tool. This stand-alone tool facilitates and assists the power supply engineer with design of a DC/DC buck regulator based on the LM5160 65V, 1.5A COT Buck Regulator. As such, the user can expeditiously arrive at an optimized design to meet the (...)
Features
  • Determine output filter inductance and input and output filter capacitances
  • Select components for soft-start, EN/UVLO resistors
  • Optimize and choose the ripple injection circuit required for your application
  • Determine the minimum input voltage available for a fixed output and switching frequency
CALCULATION TOOL Download
LM5160 Fly-Buck Quick Start Calculator
LM5160DNTFBK-CALC Welcome to the LM5160 Fly-Buck Regulator Quick Start Design Tool. This stand-alone tool facilitates and assists the power supply engineer with design of a DC/DC Fly-Buck regulator based on the LM5160 65V, 1.5A COT Fly-Buck Regulator. As such, the user can expeditiously arrive at an optimized design (...)
Features
  • Determine the maximum power handling capability of the part specific to the application
  • Determine the appropriate transformer turns ratio, input and output filter capacitances
  • Select components for soft-start, EN/UVLO resistors

Reference designs

REFERENCE DESIGNS Download
Automotive high voltage, high power motor driver reference design for HVAC compressor
TIDA-01418 — This brushless DC (BLDC) motor reference design controls an automotive HVAC (heating, ventilation, and air conditioning) compressor by using the UCC27712-Q1 high-side and low-side gate driver followed by discrete insulated-gate bipolar transistor (IGBT) half bridges. This reference design uses TI's (...)
document-generic Schematic
REFERENCE DESIGNS Download
Automotive Isolated 15V/4.5W Bias Power Supply Reference Design
PMP30227 — This reference design displays a power supply solution to generate an isolated 15V rail with a maximum load current of 300mA from an input voltage between 8V and 28V. It also contains an optional Buck converter on the secondary side to provide a 5V rail with 200mA load current for a microcontroller (...)
document-generic Schematic
REFERENCE DESIGNS Download
5W Isolated Triple Output Inverting Fly-Buck-Boost Reference Design
PMP30165 — The PMP30165 reference design is an inverting Fly-Buck-Boost Converter using the LM5160-Q1 to generate 3 isolated output voltages. The reference design accepts an input voltage of 10V to 14V. The LM5160-Q1 device is a 65V, 2-A synchronous step-down converter with integrated high-side and low-side (...)
document-generic Schematic
REFERENCE DESIGNS Download
5.5W Dual Output Industrial Isolated Flybuck Reference Design
PMP20330 — PMP20330 is an isolated Flybuck converter utilizing the LM5160 for industrial applications. This design has a minimum operating input voltage of 18V and a maximum input voltage of 31V. The design is capable of sourcing 1A continuous current at 3.3Vout, and 0.5A continuous current at 5Vout. Switching (...)
document-generic Schematic
REFERENCE DESIGNS Download
Thermal Protection Reference Design of IGBT Modules for HEV/EV Traction Inverters
TIDA-00794 The TIDA-00794 reference design is a temp sensing solution for IGBT thermal protection in HEV/EV traction inverter system. It monitors the IGBT temperature via the NTC thermistor integrated inside the IGBT module. It provides thermal shut down to the IGBT gate drivers once the NTC thermistor (...)
document-generic Schematic
REFERENCE DESIGNS Download
Dual-Output Isolated Fly-Buck Reference Design With an Ultra-Small Coupled Inductor
PMP15005 — PMP15005 uses the LM5160 in a Fly-Buck™ topology with the primary and secondary output both set to 5V nominal. The circuit accommodates a voltage input range from 14V to 36V, ideal for the 24-V nominal input rail. While the primary side is set at 5.4V nominally using the feedback resistors (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 14 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
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  • Qualification summary
  • Ongoing reliability monitoring

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