LM25017 7.5-48V Wide Vin, 650mA Constant On-Time Synchronous Buck Regulator | TI.com

LM25017 (ACTIVE) 7.5-48V Wide Vin, 650mA Constant On-Time Synchronous Buck Regulator

 

Description

The LM25017 device is a 48-V, 650-mA synchronous step-down regulator with integrated high-side and low-side MOSFETs. The constant on-time (COT) control scheme employed in the LM25017 device requires no loop compensation, provides excellent transient response, and enables very high step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high voltage startup regulator provides bias power for internal operation of the IC and for integrated gate drivers.

A peak current limit circuit protects against overload conditions. The undervoltage lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independently programmed. Other protection features include thermal shutdown and bias supply undervoltage lockout (VCC UVLO).

The LM25017 device is available in WSON-8 and HSOP-8 plastic packages.

Features

  • Wide 7.5-V to 48-V Input Range
  • Integrated 650-mA High-Side and
    Low-Side Switches
  • No Schottky Diode Required
  • Constant On-Time Control
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Nearly Constant Operating Frequency
  • Intelligent Peak Current Limit
  • Adjustable Output Voltage from 1.225 V
  • Precision 2% Feedback Reference
  • Frequency Adjustable to 1 MHz
  • Adjustable Undervoltage Lockout (UVLO)
  • Remote Shutdown
  • Thermal Shutdown
  • Create a Custom Design Using the LM25017 With the WEBENCH® Power Designer

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WEBENCH® Designer LM25017

Topology Option
  Min   Max Range
Vin  V 7 to 42V
Vout  V 1.225 to 30V
Iout  A 0 to 2.5A
Ambient Temp  °C -40 to 125°C

Parametrics

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Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Switching frequency (Max) (kHz) Soft start Features Operating temperature range (C) Topology
LM25017 Order now 7.5     48     1.25     40     1000     Adjustable     Over Current Protection
Synchronous Rectification    
-40 to 125     Buck
Flybuck    
LM25010 Order now 6     42     2.5     37     1000     Adjustable     Enable
Over Current Protection    
-40 to 125     Buck
Inverting Buck-Boost    
LM5007 Order now 9     75     2.5     73     800     None     Enable
Over Current Protection    
-40 to 125     Buck
Inverting Buck-Boost    
LM5010 Order now 8     75     2.5     70     1000     Adjustable     Enable
Over Current Protection    
-40 to 125     Buck
Inverting Buck-Boost    
LM5010A Order now 6     75     2.5     70     1000     Adjustable     Enable
Over Current Protection    
-40 to 150     Buck
Inverting Buck-Boost    
LM5010A-Q1 Order now 6     75     2.5     70     1000     Adjustable     Enable
Over Current Protection    
-40 to 125
-40 to 150    
Buck
Inverting Buck-Boost    
LM5160-Q1 Order now 4.5     65     2     60     1000     Adjustable     Enable
Forced PWM
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
-40 to 125     Buck
Inverting Buck-Boost    
LM5160A Order now 4.5     65     2     60     1000     Adjustable     Enable
Forced PWM
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
-40 to 125     Buck
Inverting Buck-Boost