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LM25116

Texas Instruments
Part Number LM25116
Manufacturer Texas Instruments
Description Wide-Range Synchronous Buck Controller
Published Nov 7, 2021
Detailed Description Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM25116 SNVS509E – APRIL 2007 ...
Datasheet PDF File LM25116 PDF File

LM25116
LM25116

Overview
Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM25116 SNVS509E – APRIL 2007 – REVISED SEPTEMBER 2016 LM25116 Wide-Range Synchronous Buck Controller 1 Features •1 Emulated Peak Current Mode • Wide Operating Range (Up to 42 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 36 V • Precision 1.
5% Voltage Reference • Programmable Current Limit • Programmable Soft Start • Programmable Line Undervoltage Lockout • Automatic Switch to External Bias Supply • 20-Pin HTSSOP Exposed Pad • Thermal Shutdown 2 Applications • Automotive Infotainment • Industrial DC-DC Motor Drivers • Automotive USB Adapters • Telecom Servers 3 Description The LM25116 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 using an emulated current ramp.
Current mode control provides inherent line feedforward, 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 LM25116 drives external high-side and low-side NMOS power switches with adaptive deadtime 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 adjusta...


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