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LM5177

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60-V wide VIN synchronous 4-switch buck-boost controller with bidirectional operation

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Data sheet

LM5177

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 2.8 Vin (max) (V) 60 Operating temperature range (°C) -40 to 125 Topology Buck-Boost Rating Catalog Vout (min) (V) 3.3 Vout (max) (V) 60 Iq (typ) (A) 0.00006 Duty cycle (max) (%) 100
Vin (min) (V) 2.8 Vin (max) (V) 60 Operating temperature range (°C) -40 to 125 Topology Buck-Boost Rating Catalog Vout (min) (V) 3.3 Vout (max) (V) 60 Iq (typ) (A) 0.00006 Duty cycle (max) (%) 100
HTSSOP (DCP) 38 62.08 mm² 9.7 x 6.4
  • Wide input range from 3.5 V to 60 V (85-V absolute maximum)
    • Minimum 2.8 V when V (BIAS) > 3.5 V
  • Output voltage from 3.3 V to 60 V
  • Low shutdown I Q of 3 µA
  • Low operating I Q of 60 µA
  • 3% reverse current limit accuracy for precise charging currents
  • Average input and output current monitor or limiter
  • Dynamic output voltage tracking for PWM or analog input signals
  • Power save mode (PSM) selectable for high light load efficiency
  • Two integrated high-voltage supply LDOs with automatic selection
  • 2-A peak current logic level gate driver
    • Integrated bootstrap diode
    • Bootstrap overvoltage and undervoltage protection
  • Fixed frequency across all operating modes (boost, buck-boost, buck)
    • Forced PWM mode selectable
    • Switching up to 600 kHz for small solution and component size
    • External clock synchronization
  • Spread spectrum operation selectable
  • Adjustable undervoltage protection
  • Hiccup overcurrent and short protection
  • Wide input range from 3.5 V to 60 V (85-V absolute maximum)
    • Minimum 2.8 V when V (BIAS) > 3.5 V
  • Output voltage from 3.3 V to 60 V
  • Low shutdown I Q of 3 µA
  • Low operating I Q of 60 µA
  • 3% reverse current limit accuracy for precise charging currents
  • Average input and output current monitor or limiter
  • Dynamic output voltage tracking for PWM or analog input signals
  • Power save mode (PSM) selectable for high light load efficiency
  • Two integrated high-voltage supply LDOs with automatic selection
  • 2-A peak current logic level gate driver
    • Integrated bootstrap diode
    • Bootstrap overvoltage and undervoltage protection
  • Fixed frequency across all operating modes (boost, buck-boost, buck)
    • Forced PWM mode selectable
    • Switching up to 600 kHz for small solution and component size
    • External clock synchronization
  • Spread spectrum operation selectable
  • Adjustable undervoltage protection
  • Hiccup overcurrent and short protection

The LM5177 is a four switch buck-boost controller. The device provides a regulated output voltage if the input voltage is higher, equal, or lower than the adjusted output voltage. In power safe mode, the device supports high efficiency with low output loads due to its low quiescence currents. The LM5177 runs at a fixed switching frequency, which can be set through the RT or SYNC pin. The switching frequency remains the same during buck, boost, and buck-boost operation. The integrated and optional average current monitor can help monitor and limit input and output current of the LM5177. This feature also supports charging backup power elements, like batteries or capacitors, with constant current (CC) and constant voltage (CV).

The LM5177 is a four switch buck-boost controller. The device provides a regulated output voltage if the input voltage is higher, equal, or lower than the adjusted output voltage. In power safe mode, the device supports high efficiency with low output loads due to its low quiescence currents. The LM5177 runs at a fixed switching frequency, which can be set through the RT or SYNC pin. The switching frequency remains the same during buck, boost, and buck-boost operation. The integrated and optional average current monitor can help monitor and limit input and output current of the LM5177. This feature also supports charging backup power elements, like batteries or capacitors, with constant current (CC) and constant voltage (CV).
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Technical documentation

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Type Title Date
* Data sheet LM5177 60-V Wide VIN Bidirectional 4-Switch Buck-Boost Controller datasheet (Rev. D) PDF | HTML 26 Jul 2023
Application note Parallel Operation of the Buck-Boost Converters Using LM5177 Buck-Boost Controller (Rev. A) PDF | HTML 27 Feb 2024
Application brief A Simple Constant Voltage Regulation Using the MODE Pin (Rev. A) PDF | HTML 15 Feb 2024
Application brief LM5177 4-스위치 벅 부스트 컨트롤러로 동적 전류 추적 PDF | HTML 19 Sep 2023
Application note Layout Optimization of 4-Switch Buck-Boost Converters PDF | HTML 05 Sep 2023
Application brief Precise Current Limiter Over Wide Operation Voltages in Buck-Boost Converters PDF | HTML 05 Sep 2023
User guide LM5177 Buck-Boost Controller Evaluation Module User's Guide (Rev. B) 27 Apr 2023
Application brief Dynamic Current Tracking With the LM5177 4-Switch Buck Boost Controller 24 Feb 2023
Application brief Constant Current Operation Using the Internal Current Limiter 27 Jan 2023
Certificate LM5177EVM-HP EU RoHS Declaration of Conformity (DoC) 16 Dec 2021

Design & development

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

Evaluation board

LM5177EVM-HP — LM5177 evaluation module with four switch buck-boost controller

The LM5177EVM-HP demonstrates a flexible high power buck-boost design using the LM5177 wide-vin buck-boost controller. The evaluation module is configured to operate from input voltage range of 4.2 V to 36 V and provide a regulated 16-V output with up to 9.4 A of load current.
User guide: PDF
Not available on TI.com
Calculation tool

SNVR519 — LM5177 BuckBoost Quickstart Calculator Tool

LM5177 BuckBoost Quickstart Calculator Tool
Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM5177 — 60-V wide VIN synchronous 4-switch buck-boost controller with bidirectional operation
Hardware development
Evaluation board
LM5177EVM-HP — LM5177 evaluation module with four switch buck-boost controller
Download
PCB layout

LM5177EVM-HP PCB Layout (Rev. A)

SNVR526A.ZIP (1766 KB)
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Package Pins Download
HTSSOP (DCP) 38 View options
TI's Standard Terms and Conditions for Evaluation Items apply.

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