LM5018 7.5-100V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator | TI.com

LM5018 (ACTIVE)

7.5-100V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator

7.5-100V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator - LM5018
 

Description

The LM5018 is a 100-V, 300-mA synchronous step-down regulator with integrated high-side and low-side MOSFETs. The constant-on-time (COT) control scheme employed in the LM5018 device requires no loop compensation, provides excellent transient response, and enables very low 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.

The LM5018 device is available in WSON-8 and SO PowerPAD-8 plastic packages.

Features

  • Wide 7.5- to 100-V Input Range
  • Integrated 300-mA High-Side and
    Low-Side Switches
  • No Schottky 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
  • Remote Shutdown
  • Thermal Shutdown
  • Packages:
    • WSON-8
    • SO PowerPAD™-8
  • Create a Custom Design Using the LM5018 With the WEBENCH® Power Designer

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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
LM5018 LM5017 LM5165 LM5166
7.5     7.5     3     3    
100     100     65     65    
1.25     1.25     1.23     1.23    
90     90     65     65    
0.3     0.65     0.15     0.5    
1     1     1     1    
50     50     50     50    
1000     1000     600     600    
1.75     1.75     0.01     0.01    
Synchronous Rectification
UVLO Adjustable    
Synchronous Rectification
UVLO Adjustable    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Constant on-time (COT)     Constant on-time (COT)     Constant on-time (COT)     Constant on-time (COT)    
90     90     100     100    
-40 to 125     -40 to 125     -40 to 150     -40 to 150    
Catalog     Catalog     Catalog     Catalog    
SO PowerPAD
WSON    
SO PowerPAD
WSON    
VSON     VSON    
New!
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer LM5018

  Min   Max Range
Vin  V 9.0 to 100.0V
Vout  V 1.25 to 90V
Iout  A ≤ 0.3A
Ambient Temp  °C -40 to 125°C


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