5.5V to 36V Input, 2A, 500kHz Step-Down Converter - TPS5420

TPS5420 (ACTIVE)

5.5V to 36V Input, 2A, 500kHz Step-Down Converter

Recommended alternative parts

  • TPS5410  -  1A pin compatible version of the TPS5420
  • TPS5430  -  3A pin compatible version of the TPS5430
  • TPS40200  -  4.5 to 52V DC/DC controller requiring external MOSFET

Description

The TPS5420 is a high-output-current PWM converter that integrates a low resistance high side N-channel MOSFET. Included on the substrate with the listed features is a high performance voltage error amplifier that provides tight voltage regulation accuracy under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 5.5 V; an internally set slow-start circuit to limit inrush currents; and a voltage feed-forward circuit to improve the transient response. Using the ENA pin, shutdown supply current is reduced to 18 µA typically. Other features include an active-high enable, overcurrent limiting, overvoltage protection and thermal shutdown. To reduce design complexity and external component count, the TPS5420 feedback loop is internally compensated.

The TPS5420 device is available in an easy to use 8-pin SOIC package. TI provides evaluation modules and the Designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.

Features

  • Wide Input Voltage Range: 5.5 V to 36 V
  • Up to 2-A Continuous (3-A Peak) Output Current
  • High Efficiency up to 95% Enabled by
    110-mΩ Integrated MOSFET Switch
  • Wide Output Voltage Range: Adjustable Down to 1.22 V
    with 1.5% Initial Accuracy
  • Internal Compensation Minimizes External Parts Count
  • Fixed 500-kHz Switching Frequency for Small Filter Size
  • Improved Line Regulation and Transient Response by
    Input Voltage Feed Forward
  • System Protected by Over Current Limiting, Over Voltage
    Protection and Thermal
    Shutdown
  • –40°C to 125°C Operating Junction
    Temperature Range
  • Available in Small 8-Pin SOIC Package

View more

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$)
TPS5420 TPS5430 TPS54340 TPS5450 TPS54240 TPS54360 TPS54560 TPS54540 TPS54260 TPS54360-Q1 TPS54541 TPS54561 TPS54340-Q1
1     1     1     1     1     1     1     1     1     1     1     1     1    
5.5     5.5     4.5     5.5     3.5     4.5     4.5     4.5     3.5     4.5     4.5     4.5     4.5    
36     36     42     36     42     60     60     42     60     60     42     60     42    
1.23     1.23     0.8     1.22     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8     0.8    
31     31     41     31     39     58.8     58.8     41.1     58     58.8     41     59     41    
2     3     3.5     5     2.5     3.5     5     5     2.5     3.5     5     5     3.5    
Buck     Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck     Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck     Buck     Buck
Inverting Buck-Boost    
500     500     2500     500     2500     2500     2500     2500     2500     2500     2500     2500     2500    
3     4     5.5     6     3.5     5.5     7.5     7.5     3.5     5.5     7.5     7.5     5.5    
3     3     0.146     3     0.138     0.146     0.146     0.146     0.138     0.146     0.152     0.152     0.146    
87     87     98     89     98     98     98     98     98     98     98     98     98    
Fixed     Fixed     Fixed     Fixed     Adjustable     Fixed     Fixed     Fixed     Adjustable     Fixed     Adjustable     Adjustable     Fixed    
Internal     Internal     External     Internal     External     External     External     External     External     External     External     External     External    
Enable     Enable     Enable
Frequency Synchronization
Light Load Efficiency
Adjustable UVLO    
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
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
Adjustable UVLO    
SWIFT     SWIFT       SWIFT     SWIFT       SWIFT     SWIFT     SWIFT            
Voltage Mode     Voltage Mode     Current Mode     Voltage Mode     Current Mode     Current Mode     Current Mode       Current Mode     Current Mode     Current Mode     Current Mode     Current Mode    
1.5     1.5     1     1.5     1     1     1     1     1     1     1     1     1    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Automotive     Catalog     Catalog     Automotive    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 85     -40 to 125     -40 to 125    
8SOIC     8SO PowerPAD     8SO PowerPAD     8SO PowerPAD     10MSOP-PowerPAD
10VSON    
8SO PowerPAD     8SO PowerPAD     8SO PowerPAD     10MSOP-PowerPAD
10VSON    
8SO PowerPAD     10WSON     10WSON     8SO PowerPAD    
1.70 | 1ku     1.85 | 1ku     1.68 | 1ku     2.25 | 1ku     1.49 | 1ku     2.10 | 1ku     2.30 | 1ku     1.95 | 1ku     1.86 | 1ku     2.75 | 1ku     2.30 | 1ku     3.00 | 1ku     2.20 | 1ku    

Other qualified versions of TPS5420

Version Part Number Definition
Enhanced Product TPS5420-EP Supports Defense, Aerospace and Medical Applications
Automotive TPS5420-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
WEBENCH® TPS5420
    Min   Max   Range  
  Vin V    5.50 – 36.00V  
  Vout V    1.23 – 31.00V  
  Iout A    ≤ 2A  
  Ambient Temp °C    -40 – 125°C  
Footprint BOM Cost Efficiency
 
   
 
 
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