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)     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      

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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