TPS65581 4.5V to 20V Input, 3.3V 3A Synchronous Step-Down SWIFT™ Converter w/ Low-Side Gate Driver | TI.com

TPS65581 (ACTIVE) 4.5V to 20V Input, 3.3V 3A Synchronous Step-Down SWIFT™ Converter w/ Low-Side Gate Driver

 

Description

The TPS65581 is a triple, advanced D-CAP2™ mode synchronous buck converter. The TPS65581 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, and low standby current solution. The main control loops of the TPS65581 uses the advanced D-CAP2™ mode control which provides a fast transient response with no external compensation components. Advanced D-CAP2™ mode control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ allows the TPS65581 to maintain high efficiency during light load conditions. The device is able to adapt to both low equivalent series resistance (ESR) output capacitors such as POSCAP or SP-CAP, and ultra-low ESR, ceramic capacitors. The device provides convenient and efficient operation with input voltages from 4.5V to 18V.

The TPS65581 is available in 4.4mm × 6.5mm 20 pin TSSOP (PWP) package, and is specified from –40°C to 85°C ambient temperature range.

Features

  • Advanced D-CAP2 Control Mode
    • Fast Transient Response
    • No External Parts Required
      For Loop Compensation
    • Compatible with Ceramic Output
      Capacitors
  • Wide Input Voltage Range :
    4.5 V to 18 V
  • Output Voltage Range :
    0.76 V to 7 V
  • Highly Efficient Integrated FETs
    Optimized for Low Duty Cycle
    Applications
    • 160 mΩ (High Side) and 130 mΩ
      (Low Side) for 2.5A
    • 250mΩ (High Side) and 230mΩ
      (Low Side) for 1.5A
  • High Initial Reference Accuracy
  • Low-Side RDS(on) Loss-Less
    Current Sensing
  • Fixed 1.2 ms Soft Start
  • Non-Sinking Pre-Biased Soft
    Start
  • 700 kHz Switching Frequency
  • Cycle-by-Cycle Over-Current
    Limiting Control
  • OCL, OVP, UVP, UVLO, TSD
    Protections
  • Hiccup Timer for Over Load
    Protection
  • PowerGood
  • Adaptive Gate Drivers with Integrated
    Boost PMOS Switch
  • OCP Constant Due To Thermally Compensated
    RDS(on) with 4000ppm/℃
  • 20-Pin HTSSOP
  • Auto-Skip Eco-mode for High Efficiency at
    Light Load

Parametrics

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Part number Order Regulated outputs (#) Processor supplier Processor name Vin (Min) (V) Vin (Max) (V) Step-up DC/DC controller Step-down DC/DC controller LDO Step-up DC/DC converter Step-down DC/DC converter Iout (Max) (A) Iq (Typ) (mA) Features Shutdown current (Typ) (uA) Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
TPS65581 Order now 3     LBC7     LBC7     4.5     18     0     0     0     0     3     2.5     2.9     Enable Pin
Over Current Protection
Power Good
Thermal Shutdown
UVLO Fixed    
1.8     Catalog     -40 to 125     HTSSOP | 20     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)    
TPS65580 Order now 3     LBC7     LBC7     4.5     18     0     0     0     0     3     2.5     2.9     Enable Pin
Over Current Protection
Power Good
Thermal Shutdown
UVLO Fixed    
1.8     Catalog     -40 to 125     HTSSOP | 20     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)