SIMPLE SWITCHER® 42Vin, 2.0A Step-Down Voltage Regulator in micro SMD - LMR24220

LMR24220 (ACTIVE)

SIMPLE SWITCHER® 42Vin, 2.0A Step-Down Voltage Regulator in micro SMD

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Description

The LMR24220 Synchronously Rectified Buck Converter features all required functions to implement a highly efficient and cost effective buck regulator. It is capable of supplying 2A to loads with an output voltage as low as 0.8V. Dual N-Channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LMR24220 does not rely on output capacitor ESR for stability, and is designed to work exceptionally well with ceramic and other very low ESR output capacitors. It requires no loop compensation, results in a fast load transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the on-time. The operating frequency can be externally programmed up to 1 MHz. Protection features include VCC under-voltage lock-out, output over-voltage protection, thermal shutdown, and gate drive under-voltage lock-out. The LMR24220 is available in the small DSBGA low profile chip-scale package.

Features

  • Input Voltage Range of 4.5V to 42V
  • Output Voltage Range of 0.8V to 24V
  • Output Current up to 2.0A
  • Integrated Low RDS(ON) Synchronous MOSFETs for High Efficiency
  • Up to 1 MHz Switching Frequency
  • Low Shutdown Iq, 25 µA Typical
  • Programmable Soft-Start
  • No Loop Compensation Required
  • COT Architecture with ERM
  • 28-Bump DSBGA (2.45 x 3.64 x 0.60 mm) Packaging
  • Fully Enabled for WEBENCH Power Designer

Performance Benefits

  • Tiny Overall Solution Reduces System Cost
  • Integrated Synchronous MOSFETs Provides High Efficiency at Low Output Voltages
  • COT with ERM Architecture Requires no Loop Compensation, Reduces Component Count, and Provides Ultra Fast Transient Response
  • Stable with Low ESR Capacitors

SIMPLE SWITCHER is a trademark of Texas Instruments. WEBENCH is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

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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$)
LMR24220 TPS54340 TPS54260 TPS54240 TPS54341 TPS54540 TPS54360 TPS54541 TPS54560 TPS54561 TPS54361 TPS54361-Q1 TPS54240-Q1
1     1     1     1     1     1     1     1     1     1     1     1     1    
4.5     4.5     3.5     3.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5     3.5    
42     42     60     42     42     42     60     42     60     60     60     60     42    
0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8    
24     41     58     39     41     41.1     58.8     41     58.8     59     59     59     39    
2     3.5     2.5     2.5     3.5     5     3.5     5     5     5     3.5     3.5     2.5    
Buck     Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck     Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck     Buck
Inverting Buck-Boost    
Buck     Buck     Buck     Buck
Inverting Buck-Boost    
1000     2500     2500     2500     2500     2500     2500     2500     2500     2500     2500     2500     2500    
2.8     5.5     3.5     3.5     5.5     7.5     5.5     7.5     7.5     7.5     5.5     5.5     3.5    
0.7     0.146     0.138     0.138     0.152     0.146     0.146     0.152     0.146     0.152     0.152     0.152     0.138    
94     98     98     98     98     98     98     98     98     98     98     98     98    
Adjustable     Fixed     Adjustable     Adjustable     Adjustable     Fixed     Fixed     Adjustable     Fixed     Adjustable     Adjustable     Adjustable     Fixed    
Not Needed     External     External     External     External     External     External     External     External     External     External     External     External    
Enable
Synchronous Rectification    
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    
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    
Adjustable UVLO
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking    
SIMPLE SWITCHER       SWIFT     SWIFT       SWIFT         SWIFT            
COT with emulated ripple     Current Mode     Current Mode     Current Mode     Current Mode       Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode     Current Mode    
2     1     1     1     1     1     1     1     1     1     1     1     1    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Automotive     Automotive    
-20 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 85     -40 to 125     -40 to 125     -40 to 85     -40 to 125     -40 to 125     -40 to 85     -40 to 125     -40 to 125    
28DSBGA     8SO PowerPAD     10MSOP-PowerPAD
10VSON    
10MSOP-PowerPAD
10VSON    
10WSON     8SO PowerPAD     8SO PowerPAD     10WSON     8SO PowerPAD     10WSON     10WSON     10WSON     10MSOP-PowerPAD
10VSON    
2.00 | 1ku     1.68 | 1ku     1.86 | 1ku     1.49 | 1ku     2.00 | 1ku     1.95 | 1ku     2.10 | 1ku     2.30 | 1ku     2.30 | 1ku     3.00 | 1ku     2.60 | 1ku     3.10 | 1ku     1.74 | 1ku    

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WEBENCH® LMR24220
    Min   Max   Range  
  Vin V    4.50 – 42.00V  
  Vout V    0.80 – 24.00V  
  Iout A    ≤ 2A  
  Ambient Temp °C    -40 – 125°C  
Footprint BOM Cost Efficiency
 
   
 
 
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