LM34910C

ACTIVE

8-50V, 1.25A Constant On-Time Non-Synchronous Buck Regulator

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Product details

Parameters

Vin (Min) (V) 8 Vin (Max) (V) 50 Vout (Min) (V) 2.5 Vout (Max) (V) 45 Iout (Max) (A) 1.25 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 1000 Features Enable, Over Current Protection Control mode Constant on-time (COT) Duty cycle (Max) (%) 97 Type Converter Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

WSON (DPR) 10 16 mm² 4 x 4 open-in-new Find other Buck converters (integrated switch)

Features

  • Integrated 55V, N-Channel Buck Switch
  • Integrated Start-Up Regulator
  • Input Voltage Range: 8V to 50V
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant with Load Current and Input Voltage
  • Maximum Duty Cycle Limited During Start-Up
  • Adjustable Output Voltage
  • Valley Current Limit At 1.25A
  • Precision Internal Reference
  • Low Bias Current
  • Highly Efficient Operation
  • Thermal Shutdown

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Description

The LM34910C Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 1.25A to the load. This buck regulator contains a 55V N-Channel Buck Switch, and is available in the thermally enhanced WSON-10 package. The hysteretic regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The current limit detection is set at 1.25A. Additional features include: VCC under-voltage lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter.

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Technical documentation

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Type Title Date
* Datasheet LM34910C High Voltage (50V, 1.25A) Step Down Switching Regulator datasheet (Rev. B) Mar. 21, 2013
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

Design & development

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Design tools & simulation

SIMULATION MODELS Download
SNVM993.ZIP (81 KB) - PSpice Model
SIMULATION MODELS Download
SNVM994.ZIP (3 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
WSON (DPR) 10 View options

Ordering & quality

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