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.

For all available packages, see the orderable addendum at the end of the data sheet.

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 Step-Down (Buck) Converter

 
Regulated Outputs (#)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Topology
Switching Frequency (Max) (kHz)
Switch Current Limit (Typ) (A)
Iq (Typ) (mA)
Duty Cycle (Max) (%)
Soft Start
Compensation
Special Features
Brand
Control Mode
Vref Accuracy (Typ) (%)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
LM5017 LM25010 LM25017 LM5010 LM5160 LM5160A
  1         1     1    
7.5     6     7.5     8     4.5     4.5    
100     42     48     75     65     65    
1.25     2.5     1.25     2.5     2     2    
90     37     40     70     60     60    
0.65     1     0.65     1     1.5     1.5    
Buck     Buck     Buck     Buck     Buck     Buck    
1000     1000     1000     1000     1000     1000    
1.3     1.25     1.3     1.25     2.5     2.5    
1.75     0.645     1.75     0.65     2.3     2.3    
90     99     90     99     92     92    
  Adjustable     None     Adjustable     Adjustable     Adjustable    
Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed    
Adjustable UVLO
Synchronous Rectification    
Enable     Adjustable UVLO
Synchronous Rectification    
Enable     Adjustable UVLO
Enable
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification    
Adjustable UVLO
Enable
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification    
        Wide Vin     Wide Vin    
Constant on-time (COT)     Constant on-time (COT)     Constant on-time (COT)     Constant on-time (COT)     Constant on-time (COT)     Constant on-time (COT)    
2     2     2     2     1     1    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
  -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
8SO PowerPAD
8WSON    
10WSON
14HTSSOP    
8SO PowerPAD
8WSON    
10WSON
14HTSSOP    
12WSON     12WSON    
1.57 | 1ku     0.95 | 1ku     1.25 | 1ku     1.43 | 1ku     1.80 | 1ku     1.80 | 1ku    
WEBENCH® LM5017
    Min   Max   Range  
  Vin V V    9.00 – 100.00V  
  Vout1 V    1.25 – 100.00V  
  Iout1 A    ≤ 0.6A  

  Vout2 V     
  Iout2 A     

  Ambient Temp °C    ≤ 100°C  
Footprint BOM Cost Efficiency
 
 
 
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What are WEBENCH® tools?

Companion parts

Part # Name Product Family Comments
LM25017   7.5-48V Wide Vin, 650mA Constant On-Time Synchronous Buck Regulator   CONVERTER (INTEGRATED SWITCH) - STEP-DOWN (BUCK) CONVERTER    
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