SolarMagic 100V, 150 mA Constant On-Time Buck Switching Regulator - SM72485

SM72485 (ACTIVE)

SolarMagic 100V, 150 mA Constant On-Time Buck Switching Regulator

Description

The SM72485 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, Buck bias regulator. This high voltage regulator contains an 100 V N-Channel Buck Switch. The device is easy to implement and is provided in the VSSOP and the thermally enhanced WSON package. The regulator is based on a control scheme using an ON time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant. The control scheme requires no loop compensation. An intelligent current limit is implemented with forced OFF time, which is inversely proportional to Vout. This scheme ensures short circuit control while providing minimum foldback. Other features include: Thermal Shutdown, VCC under-voltage lockout, Gate drive under-voltage lockout, Max Duty Cycle limiter, and a pre-charge switch.

Features

  • Renewable Energy Grade
  • Operating Input Voltage Range: 6V to 95V
  • Integrated 100V, N-Channel Buck Switch
  • Internal Start-Up Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • On Time Varies Inversely With Input Voltage
  • Operating Frequency Remains Constant With Varying Line Voltage and Load Current
  • Adjustable Output Voltage From 2.5V
  • Highly Efficient Operation
  • Precision Internal Reference
  • Low Bias Current
  • Intelligent Current Limit
  • Thermal Shutdown
  • Package
    • VSSOP
    • WSON (4mm x 4mm)

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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$)
SM72485 LM5009A LM5009 LM5008A LM5008 LM5017 LM5018 TPS62160 LM25010 TPS62125 TLV62084 TLV62080 TPS62175
1     1     1     1     1     1     1     1     1     1     1     1     1    
6     6     9.5     6     9.5     7.5     7.5     3     6     3     2.7     2.5     4.7    
95     95     95     95     95     100     100     17     42     17     5.5     5.5     28    
2.5     2.5     2.5     2.5     2.5     1.25     1.25     0.9     2.5     1.2     0.5     0.5     1    
85     85     85     75     75     90     90     6     37     10     4     4     6    
0.15     0.15     0.15     0.35     0.35     0.65     0.3     1     1     0.3     2     1.2     0.5    
Buck     Buck     Buck     Buck     Buck     Buck     Buck     Buck
Inverting Buck-Boost    
Buck     Buck
Inverting Buck-Boost    
Buck     Buck     Buck
Inverting Buck-Boost    
600     600     600     600     600     1000     1000       1000     1000     2000     2000      
0.31     0.31     0.31     0.51     0.51     1.3     0.7     1.8     1.25     0.71     2.8     2.8     1    
0.485     0.485     0.485     0.485     0.485     1.75     1.75     0.017     0.645     0.013     0.03     0.03     0.0048    
99     99     99     99     99     90     90     100     99     100     100     100     100    
None     None     None     None     None         Fixed     Adjustable     Fixed     Fixed     Fixed     Fixed    
Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Not Needed     Internal     Not Needed     Internal     Internal     Internal     Internal    
Enable     Enable     Enable     Enable     Enable     Adjustable UVLO
Synchronous Rectification    
Adjustable UVLO
Synchronous Rectification    
Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification    
Enable     Adjustable UVLO
Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Enable
Light Load Efficiency
Output Discharge
Power Good    
Enable
Light Load Efficiency
Output Discharge
Power Good    
Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
              DCS-Control       DCS-Control     DCS-Control     DCS-Control     DCS-Control    
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)            
2     2     2     2     2     2     2     3     2     2.5     2.6     2.6     1.8    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125         -40 to 85     -40 to 125     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
8VSSOP
8WSON    
8VSSOP
8WSON    
8VSSOP
8WSON    
8VSSOP
8WSON    
8VSSOP
8WSON    
8SO PowerPAD
8WSON    
8SO PowerPAD
8WSON    
8VSSOP
8WSON    
10WSON
14HTSSOP    
8WSON     8WSON     8WSON     10WSON    
0.95 | 1ku     1.10 | 1ku     1.10 | 1ku     1.20 | 1ku     1.15 | 1ku     1.57 | 1ku     1.40 | 1ku     0.85 | 1ku     0.95 | 1ku     0.70 | 1ku     0.73 | 1ku     0.65 | 1ku     0.75 | 1ku    
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