TPS5430 5.5V to 36V Input, 3A, 500kHz Step-Down Converter | TI.com

TPS5430 (ACTIVE)

5.5V to 36V Input, 3A, 500kHz Step-Down Converter

 

Recommended alternative parts

  • TPS54340  -  Recommended for new designs – The TPS54340 has a higher Vin and lower RDSon MOSFET for higher efficiency.
  • LM43603  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 
  • LMR14030  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 
  • LMR23630  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 

Description

The TPS543x 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 are 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, over-voltage protection and thermal shutdown. To reduce design complexity and external component count, the TPS543x feedback loop is internally compensated. The TPS5431 is intended to operate from power rails up to 23 V. The TPS5430 regulates a wide variety of power sources including 24 V bus.

The TPS543x device is available in a thermally enhanced, easy to use 8-pin SOIC PowerPAD™ 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:
    • TPS5430: 5.5 V to 36 V
    • TPS5431: 5.5 V to 23 V
  • Up to 3-A Continuous (4-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 Overcurrent Limiting, Overvoltage Protection and Thermal Shutdown
  • –40°C to 125°C Operating Junction Temperature Range
  • Available in Small Thermally Enhanced 8-Pin SO PowerPAD™ Package
  • Create a Custom Design Using the TPS5430 With the WEBENCH® Power Designer

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Parametrics Compare all products in Buck converters (integrated switch)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
Type
TPS5430 LM43603 LMR14030 LMR23630 TPS54340
5.5     3.5     4     4.5     4.5    
36     36     40     36     42    
1.23     1     1     1     0.8    
31     28     36     30     41    
3     3     3.5     3     3.5    
1     1     1     1     1    
500     200     200     200     100    
500     2200     2500     2200     2500    
3     0.027     0.04     0.075     0.146    
Enable     Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Tracking    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Tracking
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
UVLO Adjustable    
Voltage Mode     Current Mode     Current Mode     Current Mode     Current Mode    
87     99     98     97     98    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
Catalog     Catalog     Catalog     Catalog     Catalog    
SO PowerPAD | 8     HTSSOP | 16
SON | 16    
SO PowerPAD | 8     SO PowerPAD | 8
SON | 12    
SO PowerPAD | 8    
Converter     Converter     Converter     Converter     Converter    

Design tool

New!
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer TPS5430

  Min   Max Range
Vin  V 5.5 to 36.0V
Vout  V 1.23 to 31V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 125°C


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