SIMPLE SWITCHER 42Vin, 0.3A Step-Down Voltage Regulator in SOT-23 - LMR14203

LMR14203 (ACTIVE)

SIMPLE SWITCHER 42Vin, 0.3A Step-Down Voltage Regulator in SOT-23

Description

The LMR14203 is a PWM DC/DC buck (step-down) regulator. With a wide input range from 4.5V-42V, it is suitable for a wide range of applications such as power conditioning from unregulated sources. They feature a low RDSON (0.9Ω typical) internal switch for maximum efficiency (85% typical). Operating frequency is fixed at 1.25 MHz allowing the use of small external components while still being able to have low output voltage ripple. Soft-start can be implemented using the shutdown pin with an external RC circuit allowing the user to tailor the soft-start time to a specific application.

The LMR14203 is optimized for up to 300 mA load current.

Additional features include: thermal shutdown, VIN under-voltage lockout, and gate drive under-voltage lockout. The LMR14203 is available in a low profile SOT-6L package.

Features

  • Input Voltage Range of 4.5V to 42V
  • Output Voltage Range of 0.765V to 34V
  • Output Current up to 0.3A
  • 1.25 MHz Switching Frequency
  • Low Shutdown Iq, 16 µA Typical
  • Short Circuit Protected
  • Internally Compensated
  • Soft-Start Function
  • Thin SOT-23-6 Package (2.97 x 1.65 x 1mm)
  • Fully Enabled for WEBENCH® Power Designer

Performance Benefits

  • Tight Accuracy for Powering Digital ICs
  • Extremely Easy to Use
  • Tiny Overall Solution Reduces System Cost

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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$)
LMR14203
1    
4.5    
42    
0.765    
34    
0.3    
Buck    
1250    
0.525    
1.3    
87    
Adjustable    
Internal    
Enable    
SIMPLE SWITCHER    
Current Mode    
2.5    
Catalog    
-40 to 125    
6SOT    
0.90 | 1ku    

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WEBENCH® LMR14203X
    Min   Max   Range  
  Vin V    4.50 – 42.00V  
  Vout V    0.77 – 40.00V  
  Iout A    ≤ 0.30A  
  Ambient Temp °C    ≤ 100°C  
Footprint BOM Cost Efficiency
 
 
 
'U1 D1 L1 Cboot Rfb1 Rfb2 Cout Cin '
 
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