7.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator - LM5017

LM5017 (ACTIVE)

7.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator

 

Description

The LM5017 is a 100-V, 600-mA synchronous step-down regulator with integrated high side and low side MOSFETs. The constant on-time (COT) control scheme employed in the LM5017 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 LM5017 device is available in WSON-8 and HSOP PowerPAD-8 plastic packages.

Features

  • Wide 7.5-V to 100-V Input Range
  • Integrated 100-V 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 (UVLO)
  • Remote Shutdown
  • Thermal Shutdown
  • Packages:
    • WSON-8
    • SO PowerPAD™-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)
Special Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
Approx. Price (US$)
LM5017 LM25010 LM25017 LM5007 LM5010 LM5010A LM5010A-Q1 LM5160-Q1 LM5160A LM5161
7.5    6    7.5    9    8    6    6    4.5    4.5    4.5   
100    42    48    75    75    75    75    65    65    100   
1.25    2.5    1.25    2.5    2.5    2.5    2.5    2    2    2   
90    37    40    73    70    70    70    60    60    92   
0.65    1    0.65    0.5    1    1    1    1.5    2    1   
1    1      1    1    1    1    1    1    1   
50    50      50    50    50    50    50    50    50   
1000    1000    1000    800    1000    1000    1000    1000    1000    1000   
1.75    0.645    1.75    0.5    0.65    0.65    0.65    2.3    2.3    2.3   
Synchronous Rectification
UVLO Adjustable   
Enable    Adjustable UVLO
Synchronous Rectification   
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   
Enable
Light Load Efficiency
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)        COT with emulated ripple
Constant on-time (COT)   
90    99    90    99    99    99    99    92    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    Catalog    Automotive    Automotive    Catalog    Catalog   
SO PowerPAD
WSON   
HTSSOP
WSON   
SO PowerPAD
WSON   
VSSOP
WSON   
HTSSOP
WSON   
HTSSOP
WSON   
HTSSOP    HTSSOP    HTSSOP
WSON   
HTSSOP   
1.57 | 1ku    0.95 | 1ku    1.25 | 1ku    1.30 | 1ku    1.43 | 1ku    1.47 | 1ku    1.75 | 1ku    2.12 | 1ku    1.80 | 1ku    1.80 | 1ku   

WEBENCH® Designer LM5017

  Min   Max Range
Vin  V 9.00 to 100.00V
Vout  V 1.25 to 90.00V
Iout  A ≤ 0.6A
Ambient Temp  °C ≤ 100°C
Isolated Output


Footprint BOM Cost Efficiency

 
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