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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Parametrics Compare all products in Buck converters (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
Type
LM25017 LM25010 LM5007 LM5010 LM5010A LM5010A-Q1 LM5160-Q1 LM5160A
7.5     6     9     8     6     6     4.5     4.5    
48     42     75     75     75     75     65     65    
1.25     2.5     2.5     2.5     2.5     2.5     2     2    
40     37     73     70     70     70     60     60    
0.65     1     0.5     1     1     1     1.5     2    
  1     1     1     1     1     1     1    
240     50     50     50     50     50     50     50    
1000     1000     800     1000     1000     1000     1000     1000    
1.75     0.645     0.5     0.65     0.65     0.65     2.3     2.3    
Synchronous Rectification     Enable     Enable     Enable     Enable     Enable     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)    
90     99     99     99     99     99     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    
Catalog     Catalog     Catalog     Catalog     Catalog     Automotive     Automotive     Catalog    
SO PowerPAD | 8
WSON | 8    
HTSSOP | 14
WSON | 10    
VSSOP | 8
WSON | 8    
HTSSOP | 14
WSON | 10    
HTSSOP | 14
WSON | 10    
HTSSOP | 14     HTSSOP | 14     WSON | 12    
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