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 LM2842 LM2841 TPS5401 TPS54340 TPS54360 TPS54541 TPS54560 TPS54561 TPS54361 TPS54341 TPS54540
1     1     1     1     1     1     1     1     1     1     1     1     1    
4.5     4.5     4.5     4.5     3.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5    
42     42     42     42     42     42     60     42     60     60     60     42     42    
0.765     0.765     0.765     0.765     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8    
34     34     34     34     39     41     58.8     41     58.8     59     59     41     41.1    
0.3     0.6     0.6     0.3     0.5     3.5     3.5     5     5     5     3.5     3.5     5    
Buck     Buck     Buck     Buck     Buck     Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck     Buck
Inverting Buck-Boost    
Buck     Buck     Buck     Buck
Inverting Buck-Boost    
1250     1250         2500     2500     2500     2500     2500     2500     2500     2500     2500    
0.525     1.15         0.94     5.5     5.5     7.5     7.5     7.5     5.5     5.5     7.5    
1.3     1.3         0.116     0.146     0.146     0.152     0.146     0.152     0.152     0.152     0.146    
87     87         98     98     98     98     98     98     98     98     98    
Adjustable     Adjustable         Adjustable     Fixed     Fixed     Adjustable     Fixed     Adjustable     Adjustable     Adjustable     Fixed    
Internal     Internal         External     External     External     External     External     External     External     External     External    
Enable     Enable         Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Adjustable UVLO    
SIMPLE SWITCHER     SIMPLE SWITCHER     SIMPLE SWITCHER     SIMPLE SWITCHER     SWIFT           SWIFT           SWIFT    
Current Mode     Current Mode         Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode      
2.5     2.5         1.75     1     1     1     1     1     1     1     1    
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 150     -40 to 125     -40 to 125     -40 to 85     -40 to 125     -40 to 125     -40 to 85     -40 to 85     -40 to 125    
6SOT     6SOT     6SOT     6SOT     10MSOP-PowerPAD     8SO PowerPAD     8SO PowerPAD     10WSON     8SO PowerPAD     10WSON     10WSON     10WSON     8SO PowerPAD    
0.90 | 1ku     0.99 | 1ku     1.25 | 1ku     1.10 | 1ku     0.85 | 1ku     1.68 | 1ku     2.10 | 1ku     2.30 | 1ku     2.30 | 1ku     3.00 | 1ku     2.60 | 1ku     2.00 | 1ku     1.95 | 1ku    

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WEBENCH® LMR14203
    Min   Max   Range  
  Vin V    4.50 – 42.00V  
  Vout V    0.77 – 40.00V  
  Iout A    ≤ 0.3A  
  Ambient Temp °C    -40 – 125°C  
Footprint BOM Cost Efficiency
 
   
 
 
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