TPS54386 4.5V to 28V Input, Dual 3A Outputs, 600kHz Step-Down Converter with Internal Compensation | TI.com

TPS54386 (ACTIVE) 4.5V to 28V Input, Dual 3A Outputs, 600kHz Step-Down Converter with Internal Compensation

 

Description

The TPS54383 and TPS54386 are dual output, non-synchronous buck converters capable of supporting 3-A output applications that operate from a 4.5-V to 28-V input supply voltage, and require output voltages between 0.8 V and 90% of the input voltage.

With an internally-determined operating frequency, soft-start time, and control loop compensation, these converters provide many features with a minimum of external components. Channel 1 overcurrent protection is set at 4.5 A, while Channel 2 overcurrent protection level is selected by connecting a pin to ground, to BP, or left floating. The setting levels are used to allow for scaling of external components for applications that do not need the full load capability of both outputs.

The outputs may be enabled independently, or may be configured to allow either ratio-metric or sequential startup sequencing. Additionally, the two outputs may be powered from different sources.

Features

  • 4.5-V to 28-V Input Range
  • Output Voltage Range 0.8 V to 90% of Input
    Voltage
  • Output Current Up to 3 A
  • Two Fixed Switching Frequency Versions:
    • TPS54383: 300 kHz
    • TPS54386: 600 kHz
  • Three Selectable Levels of Overcurrent Protection
    (Output 2)
  • 0.8-V 1.5% Voltage Reference
  • 2.1-ms Internal Soft-Start
  • Dual PWM Outputs 180° Out-of-Phase
  • Ratiometric or Sequential Startup Modes Selectable
    by a Single Pin
  • 85-mΩ Internal High-Side MOSFETs
  • Current Mode Control
  • Internal Compensation
  • Pulse-by-Pulse Overcurrent Protection
  • Thermal Shutdown Protection at +148\xC2°C
  • 14-Pin PowerPAD™ HTSSOP package

Parametrics

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Part number Order 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 Package size: mm2:W x L (PKG)
TPS54386 Order now 4.5     28     0.8     25.2     3     2     600     600     1.8     Enable
Phase Interleaving    
Current Mode     85     -40 to 125     Catalog     HTSSOP | 14     Converter     14HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 14)    
TPS54383 Order now 4.5     28     0.8     25.2     3     2     300     300     1.8     Enable
Phase Interleaving    
Current Mode     90     -40 to 125     Catalog     HTSSOP | 14     Converter     14HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 14)    
TPS55383 Samples not available 4.5     28     0.8     25.2     3     2     300     300     1.8     Enable
Phase Interleaving    
Current Mode     90     -40 to 125     Catalog     HTSSOP | 16     Converter     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)    
TPS55386 Order now 4.5     28     0.8     25.2     3     2     600     600     1.8     Enable
Phase Interleaving    
Current Mode     85     -40 to 125     Catalog     HTSSOP | 16     Converter     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)