TPS5402 (ACTIVE)

3.5V to 28V Input, 1.7A Output, Non-Synchronous Step-Down Regulator with Integrated MOSFET

 

Description

The TPS5402 is a monolithic non-synchronous buck regulator with wide operating input voltage range from 3.5 V to 28 V. Current mode control with internal slope compensation is implemented to reduce component count.

TPS5402 also features a light load pulse skipping mode, which allows for a power loss reduction from the input power supply to the system at light loading.

The switching frequency of the converters can be set from 50 kHz to 1.1 MHz with an external resistor. Frequency spread spectrum operation is introduced for EMI reduction.

A cycle-by-cycle current limit with frequency fold back protects the IC at over loading condition.

Features

  • 3.5-V to 28-V Wide Input Voltage Range
  • Up to 1.7-A Maximum Continuous Output Loading Current
  • Pulse Skipping Mode to Achieve High Light Load Efficiency
  • High Light Load Efficiency
  • Frequency Spread Spectrum to Reduce EMI
  • Adjustable 50-kHz to 1.1-MHz Switching Frequency Set by an External Resistor
    (Leave pin ROSC floating. Set frequency to 120 kHz and ground connection to 70 kHz)
  • Frequency Spread Spectrum to Ease EMI Issue
  • Peak Current-Mode Control
  • Cycle-by-CycleOver Current Protection
  • External Soft Start
  • Available in SOIC8 Package

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Parametrics Compare all products in Buck Converter (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
TPS5402 TPS5403 TPS5405 TPS54202H TPS54302 TPS54308 TPS54331 TPS54335-2A TPS54335A
3.5    4.5    6.8    4.5    4.5    4.5    3.5    4.5    4.5   
28    28    28    28    28    28    28    28    28   
0.8    3.3    4.85    0.6    0.6    1    0.8    0.8    0.8   
26    3.3    5.15    26    26    26    25    25    25   
1.7    1.7    2    2    3    3    3    3    3   
1    1    1    1    1    1    1    1    1   
50    50    50    390    400    350    570    50    50   
1100    1100    1100    590    400    350    570    1500    1500   
0.1    0.1    100    0.04    0.04    0.3    0.11    0.6    0.6   
Light Load Efficiency    Light Load Efficiency    Light Load Efficiency    Enable
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable   
Enable
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable   
Enable
Forced Pulse Width Modulation (FPWM) Mode
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable   
Enable
Light Load Efficiency
UVLO Adjustable   
Enable
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable   
Enable
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable   
Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode   
93    93    93    100    100    100    90    90    90   
-40 to 125    -40 to 125    -40 to 85    -40 to 125    -40 to 85    -40 to 125    -40 to 150    -40 to 85    -40 to 150   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
SOIC    SOIC    SOIC    SOT-23-THIN    SOT-23-THIN    SOT-23-THIN    SO PowerPAD
SOIC   
VSON    SO PowerPAD
VSON