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 LMR14206
1     1    
4.5     4.5    
42     42    
0.765     0.765    
34     34    
0.3     0.6    
Buck     Buck    
1500     1250    
0.525     1.15    
1.3     1.3    
87     87    
Adjustable     Adjustable    
Internal     Internal    
Enable     Enable    
SIMPLE SWITCHER     SIMPLE SWITCHER    
Current Mode     Current Mode    
2.5     2.5    
Catalog     Catalog    
-40 to 125     -40 to 125    
6SOT     6SOT    
0.90 | 1ku     0.99 | 1ku    

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New! Interactive Design
Click to instantly view a schematic, charts, Bill of Materials, and Operating Values.
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WEBENCH® LMR14203
    Min   Max   Range  
  Vin V 4.5 to 42.0V  
  Vout V 0.77 to 40.0V  
  Iout A ≤ 0.3A  
  Ambient Temp °C -40 to 125°C  
Footprint BOM Cost Efficiency
 
   
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