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

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
  • Packages:
    • WSON-8
    • HSOP-8

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Parametrics Compare all products in Buck Converter (Integrated Switch)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
LM25017 LM25010 LM5007 LM5010 LM5010A LM5010A-Q1 LM5017 LM5160-Q1 LM5160A
7.5    6    9    8    6    6    7.5    4.5    4.5   
48    42    75    75    75    75    100    65    65   
1.25    2.5    2.5    2.5    2.5    2.5    1.25    2    2   
40    37    73    70    70    70    90    60    60   
0.65    1    0.5    1    1    1    0.65    1.5    2   
  1    1    1    1    1    1    1    1   
240    50    50    50    50    50    50    50    50   
1000    1000    800    1000    1000    1000    1000    1000    1000   
1.75    0.645    0.5    0.65    0.65    0.65    1.75    2.3    2.3   
Synchronous Rectification    Enable    Enable    Enable    Enable    Enable    Synchronous Rectification
UVLO Adjustable   
Enable
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable   
Enable
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable   
Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)   
90    99    99    99    99    99    90    92    92   
-40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 150    -40 to 125
-40 to 150   
-40 to 125    -40 to 125    -40 to 125   
Catalog    Catalog    Catalog    Catalog    Catalog    Automotive    Catalog    Automotive    Catalog   
SO PowerPAD
WSON   
HTSSOP
WSON   
VSSOP
WSON   
HTSSOP
WSON   
HTSSOP
WSON   
HTSSOP    SO PowerPAD
WSON   
HTSSOP    WSON   

WEBENCH® Designer LM25017

  Min   Max Range
Vin  V 9.00 to 48.00V
Vout  V 1.25 to 48.00V
Iout  A ≤ 0.65A
Ambient Temp  °C ≤ 100°C
Isolated Output


Footprint BOM Cost Efficiency

 
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