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 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 (VCC UVLO).

The LM5017 is available in WSON-8 and SO PowerPAD-8 plastic packages.

Features

  • Wide 7.5 V to 100 V Input Range
  • Integrated 100 V, High 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

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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 LM25017 TPS54331 LM5010 LM5010A LM25010 TPS54328 TPS54327 TPS54239 TPS54228 TPS54229 TPS54227 TPS54427
          1         1       1        
          6         4.5       4.5        
          42         23       18        
          2.5         0.76       0.76        
          37         7       7        
0.65     0.65     3     1     1     1     3     3     2     2     2     2     4    
          Buck         Buck       Buck        
          1000         600       650        
          1.25         3.1       3.3        
1.75     1.75     0.11     0.65     0.65     0.645     0.8     0.8     0.6     0.8     0.8     0.8     0.95    
90     90     90     99     99     99     90     90     90     90     90     90     95    
          Adjustable         Adjustable       Adjustable        
Not Needed     Not Needed     External     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed    
          Enable         Enable
Synchronous Rectification    
  Enable
Synchronous Rectification    
   
            SWIFT     SWIFT       SWIFT         SWIFT    
Constant on-time (COT)     Constant on-time (COT)     Current Mode     Constant on-time (COT)     Constant on-time (COT)     Constant on-time (COT)     D-CAP2     D-CAP2     D-CAP2     D-CAP2     D-CAP2     D-CAP2     D-CAP2    
          2         2       2        
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
  -40 to 125     -40 to 150     -40 to 125     -40 to 150     -40 to 125     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
8SO PowerPAD
8WSON    
8SO PowerPAD
8WSON    
8SO PowerPAD
8SOIC    
10WSON
14HTSSOP    
10WSON
14HTSSOP    
10WSON
14HTSSOP    
10VSON
8SO PowerPAD    
10VSON
8SO PowerPAD    
8SO PowerPAD     10VSON
8SO PowerPAD
8SOIC    
8SO PowerPAD     10VSON
8SO PowerPAD    
10VSON
8SO PowerPAD    
1.57 | 1ku     1.25 | 1ku     0.60 | 1ku     1.43 | 1ku     1.47 | 1ku     0.95 | 1ku     0.75 | 1ku     0.73 | 1ku     0.73 | 1ku     0.63 | 1ku     1.17 | 100u     0.61 | 1ku     0.90 | 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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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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