TPS65283 4.5 V to 18 V Input Voltage, 3.5A/2.5A, Synchronous Dual Buck Converter w/ Power Distribution Switch | TI.com

TPS65283 (ACTIVE) 4.5 V to 18 V Input Voltage, 3.5A/2.5A, Synchronous Dual Buck Converter w/ Power Distribution Switch

 

Description

The TPS65283, TPS65283-1 in thermally-enhanced 4-mm × 4-mm VQFN package is a full featured
4.5- to 18-V Vin, 3.5-A/2.5-A output current synchronous step down DC-DC converter, which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. The device also incorporates one N-channel MOSFET power switches for power distribution systems. This device provides a total power distribution solution, where precision current limiting and fast protection response are required.

The 60-mΩ independent power distribution switch limits the output current to a programmable current limit threshold by using an external resistor. The current limit accuracy can be achieved as tight as ±10% at typical 1.25 A. The nFAULT output asserts low under overcurrent and reverse-voltage conditions.

Constant frequency peak current mode control in DC-DC converter simplifies the compensation and optimizes transient response. Cycle-by-cycle overcurrent protection and operating in hiccup mode limit MOSFET power dissipation during buck output short circuit or over loading conditions. When die temperature exceeds thermal over loading threshold, the overtemperature protection shuts down the device.

Features

  • Buck Converter
    • Wide Input Voltage Range 4.5 to 18 V
    • Integrated Dual Buck Converter, Maximum Continuous Current 3.5 A (Buck1) / 2.5 A (Buck2)
    • Feedback Reference Voltage 0.6 V ±1%
    • Adjustable Switching Frequency 200 kHz to
      2 MHz
    • Internal Built Soft Start Time 2.4 ms
    • External Clock Synchronization
    • Cycle-by-Cycle Current Limit
    • Power Good Indicator for Each Buck
    • Continuous Current Mode (TPS65283) or Pulse Skipping Mode (PSM) (TPS65283-1) at Light Load
  • Power Distribution Switch
    • Integrated a Power Distribution Switch With On-Resistance 60 mΩ
    • Operating Input Voltage Range 2.4 to 6 V
    • Adjustable Current Limiting up to 2.7 A
    • Current-Limit Accuracy ±10% at 1.25 A (Typical)
    • Auto Recovery Overcurrent Protection
    • Reverse Input to Output Voltage Protection
    • Overtemperature Protection
    • 24-Lead VQFN (RGE) 4-mm × 4-mm Package

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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)
TPS65283 Order now 4.5     18     0.6     0.5     3.5     2     200     2200     0.5     Adjustable Current Limit
Enable
Frequency Synchronization
Power Good
Synchronous Rectification
UVLO Adjustable    
Current Mode     100     -40 to 125     Catalog     VQFN | 24     Converter     24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
TPS65252 Order now 4.5     16     0.8     15     3     2     300     2200     0.5     Adjustable Current Limit
Enable
Light Load Efficiency
Phase Interleaving
Power Good
Synchronous Rectification
UVLO Adjustable    
Current Mode     100     -40 to 85     Catalog     VQFN | 28     Converter     28VQFN: 25 mm2: 5 x 5 (VQFN | 28)    
TPS65283-1 Order now 4.5     18     0.6     16     3.5     2     200     2200     0.5     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
UVLO Adjustable    
Current Mode     100     -40 to 85     Catalog     VQFN | 24     Converter     24VQFN: 16 mm2: 4 x 4 (VQFN | 24)