LM5116MH Part Information

Details for LM5116MH by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Power Management

Part Description

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-bycycle 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 undervoltage lockout. The device is available in a power enhanced HTSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation.

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Part Features

  • Automatic Switch to External Bias Supply
  • Create a Custom Design Using the LM5116 with
  • Drives Standard or Logic Level MOSFETs
  • Emulated Peak Current Mode
  • Free-run or Synchronous Operation to 1 MHz
  • HTSSOP-20 Exposed Pad
  • Low IQ Shutdown (< 10 u00b5A)
  • Optional Diode Emulation Mode
  • Precision 1.5% Voltage Reference
  • Programmable Current Limit
  • Programmable Line Undervoltage Lockout
  • Programmable Output from 1.215 V to 80 V
  • Programmable Soft-Start
  • Robust 3.5-A Peak Gate Drive
  • Thermal Shutdown
  • Wide Operating Range Up to 100 V

Part Specifications

Supply Voltage Min 4.75V
Supply Voltage Max 15V
No. of Outputs 1 Output, 1Outputs
Duty Cycle (%) 98%
Controller IC Case Style TSSOP
No. of Pins 20Pins
Switching Frequency 1MHz
Topology Synchronous Buck (Step Down)
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
SVHC No SVHC (27-Jun-2018)
Operating Temperature Range -40°C to +150°C
Primary Input Voltage 100V
RoHS Compliant

Alternative Part Descriptions

  • DC DC Cntrlr Single-OUT Sync Buck 6V to 100V Input 20-Pin TSSOP EP Rail | Avnet America

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