6.5V to 28V Input, 5V Fixed Output at 2A Step-Down Regulator with Intregrated MosFET - TPS5405

TPS5405 (ACTIVE)

6.5V to 28V Input, 5V Fixed Output at 2A Step-Down Regulator with Intregrated MosFET

 

Description

The TPS5405 is a monolithic non-synchronous buck regulator with wide operating input voltage range from 6.5 V to 28 V. Current mode control with internal slope compensation is implemented to reduce component count.

TPS5405 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.

LX anti-ringing is added to address high frequency EMI issues.

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

Features

  • Fixed 5-V Output
  • 6.5-V to 28-V Wide Input Voltage Range
  • Up to 2-A Maximum Continuous Output Loading Current
  • Pulse Skipping Mode to Achieve High Light Load Efficiency
  • Over 80% Efficiency at 10-mA Loading
  • Adjustable 50-kHz to 1.1-MHz Switching Frequency Set by an
    External Resistor (Leave pin ROSC floating. Set frequency to
    120 kHz)
  • Peak Current-Mode Control
  • Cycle-by-Cycle Over Current Protection
  • Switching Node Anti-Ringing to Ease EMI Issue
  • 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
TPS5405 TPS5402 TPS5403 TPS54302 TPS54308 TPS54331 TPS54335A
6.8    3.5    4.5    4.5    4.5    3.5    4.5   
28    28    28    28    28    28    28   
4.85    0.8    3.3    0.6    1    0.8    0.8   
5.15    26    3.3    26    26    25    25   
2    1.7    1.7    3    3    3    3   
1    1    1    1    1    1    1   
50    50    50    400    350    570    50   
1100    1100    1100    400    350    570    1500   
100    0.1    0.1    0.04    0.3    0.11    0.6   
Light Load Efficiency    Light Load Efficiency    Light Load Efficiency    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   
Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode   
93    93    93    100    100    90    90   
-40 to 85    -40 to 125    -40 to 125    -40 to 85    -40 to 125    -40 to 150    -40 to 150   
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