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LM5116-HT

ACTIVE

80V High Temperature Wide Range Synchronous Buck Controller

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LM5146 ACTIVE 100-V synchronous buck DC/DC controller with wide duty-cycle range Smaller device footprint optimized for EMI requirements.

Product details

Vin (min) (V) 6 Vin (max) (V) 80 Vout (min) (V) 1.215 Vout (max) (V) 80 Iout (max) (A) 20 Iq (typ) (mA) 4.6 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 1000 Features Enable, Frequency synchronization, Light Load Efficiency Operating temperature range (°C) -55 to 175 Regulated outputs (#) 1 Number of phases 1 Rating High Temp Control mode Voltage mode Type Controller
Vin (min) (V) 6 Vin (max) (V) 80 Vout (min) (V) 1.215 Vout (max) (V) 80 Iout (max) (A) 20 Iq (typ) (mA) 4.6 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 1000 Features Enable, Frequency synchronization, Light Load Efficiency Operating temperature range (°C) -55 to 175 Regulated outputs (#) 1 Number of phases 1 Rating High Temp Control mode Voltage mode Type Controller
CDIP_SB (JD) 20 259.065 mm² 25.65 x 10.1
  • Emulated Peak Current Mode
  • Wide Operating Range Up to 80 V
  • Low IQ Shutdown (< 10 µA)
  • Drives Standard or Logic Level MOSFETs
  • Robust 3.5-A Peak Gate Drive
  • Free-Run or Synchronous Operation to 1 MHz
  • Optional Diode Emulation Mode
  • Programmable Output from 1.215 V to 80 V
  • Precision 1.5% Voltage Reference
  • Programmable Current Limit
  • Programmable Soft-Start
  • Programmable Line Under-Voltage Lockout
  • Automatic Switch to External Bias Supply
  • Emulated Peak Current Mode
  • Wide Operating Range Up to 80 V
  • Low IQ Shutdown (< 10 µA)
  • Drives Standard or Logic Level MOSFETs
  • Robust 3.5-A Peak Gate Drive
  • Free-Run or Synchronous Operation to 1 MHz
  • Optional Diode Emulation Mode
  • Programmable Output from 1.215 V to 80 V
  • Precision 1.5% Voltage Reference
  • Programmable Current Limit
  • Programmable Soft-Start
  • Programmable Line Under-Voltage Lockout
  • Automatic Switch to External Bias Supply

The LM5116 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle by cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The operating frequency is programmable from 50 kHz to 1 MHz. The LM5116 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A low quiescent current shutdown disables the controller and consumes less than 10 µA of total input current. Additional features include a high voltage bias regulator, automatic switch-over to external bias for improved efficiency, thermal shutdown, frequency synchronization, cycle by cycle current limit and adjustable line under-voltage lockout.

The LM5116 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle by cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The operating frequency is programmable from 50 kHz to 1 MHz. The LM5116 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A low quiescent current shutdown disables the controller and consumes less than 10 µA of total input current. Additional features include a high voltage bias regulator, automatic switch-over to external bias for improved efficiency, thermal shutdown, frequency synchronization, cycle by cycle current limit and adjustable line under-voltage lockout.

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Technical documentation

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* Data sheet LM5116-HT Wide Range Synchronous Buck Controller datasheet (Rev. B) 31 Jan 2014
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 10 Apr 2019

Design & development

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Simulation model

LM5116 PSpice Average Model

SNVM346.ZIP (53 KB) - PSpice Model
Simulation model

LM5116 PSpice Transient Model (Rev. C)

SNVM345C.ZIP (101 KB) - PSpice Model
Simulation model

LM5116 TINA-TI Transient Reference Design (Rev. B)

SNVM051B.TSC (159 KB) - TINA-TI Reference Design
Simulation model

LM5116 TINA-TI Transient Spice Model (Rev. B)

SNVM052B.ZIP (15 KB) - TINA-TI Spice Model
Simulation model

LM5116 Unencrypted PSpice Average Model

SNVM959.ZIP (2 KB) - PSpice Model
Simulation model

LM5116 Unencrypted PSpice Transient Model (Rev. A)

SNVM958A.ZIP (6 KB) - PSpice Model
Simulation tool

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CDIP_SB (JD) 20 View options

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