TPS546D24A 2.95-V to 16-V input, stackable 40-A, SWIFT™ synchronous buck converter with pin-strapping/PMBus® | TI.com

TPS546D24A
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2.95-V to 16-V input, stackable 40-A, SWIFT™ synchronous buck converter with pin-strapping/PMBus®

 

Description

The TPS546D24A is a highly integrated, non-isolated DC/DC converter capable of high frequency operation and 40-A current output from a 7-mm × 5-mm package. Two, three, and four TPS546D24A devices can be interconnected to provide up to 160 A on a single output. The device has an option to overdrive the internal 5-V LDO with an external 5-V supply via the VDD5 pin to improve efficiency and reduce power dissipation of the converter.

The TPS546D24A uses a proprietary fixed-frequency current-mode control with input feedforward and selectable internal compensation components for minimal size and stability over a wide range of output capacitances.

The PMBus interface with 1-MHz clock support gives a convenient, standardized digital interface for converter configuration as well as monitoring of key parameters including output voltage, output current, and internal die temperature. Response to fault conditions can be set to restart, latch off, or ignore, depending on system requirements. Back-channel communication between stacked devices enables all TPS546D24A converters powering a single output rail to share a single address to simplify system software/firmware design. Key parameters including output voltage, switching frequency, soft-start time, and overcurrent fault limits can also be configured through BOM selection without PMBus communication to support program free power-up.

Features

  • Split rail support: 2.95-V to 16-V PVIN;
    2.95-V to 18-V AVIN (4-VIN VDD5 for switching)
  • Integrated 4.5-mΩ/0.9-mΩ MOSFETs
  • Average current mode control with selectable internal compensation
  • 2×, 3x, 4× stackable with current sharing up to 160 A, supporting a single address per output
  • Selectable 0.6-V to 5.5-V output via pin strap or 0.25-V to 6.0-V using PMBus VOUT_COMMAND
  • Extensive PMBus command set with telemetry for VOUT, IOUT and internal die temperature
  • Differential remote sensing with internal FB divider for < 1% VOUT error –40°C to +150°C TJ
  • AVS and margining capabilities through PMBus
  • MSEL pins pin programming PMBus defaults
  • 12 Selectable switching frequencies from 225 kHz to 1.5 MHz (8 pin-strap options)
  • Frequency sync in/sync out
  • Supports prebiased output
  • Supports strongly coupled inductor
  • 7 mm × 5 mm × 1.5 mm, 40-pin QFN,
    Pitch = 0.5 mm
  • Create a Custom Design Using the TPS546D24A With WEBENCH® Power Designer

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WEBENCH® Designer TPS546D24A

  Min   Max Range
Vin  V 2.95 to 16.0V
Vout  V 0.25 to 6V
Iout  A ≤ 80A
Ambient Temp  °C -40 to 125°C

Parametrics

Compare all products in Buck converters (integrated switch) Email Download to Excel
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) Package Group Rating Type Package size: mm2:W x L (PKG)
TPS546D24A Order now 2.95     16     0.25     5.5     40     1     225     1500     9     Adaptive/Dynamic Voltage Scaling
Adjustable Current Limit
Differential Remote Sense
Enable
Forced PWM
Frequency Synchronization
Over Current Protection
PMBus
Phase Interleaving
Power Good
Pre-Bias Start-Up
Soft Start Adjustable
Synchronous Rectification
UVLO Adjustable
Voltage Margining    
Current Mode     85     -40 to 150     LQFN-CLIP | 40     Catalog     Converter     40LQFN-CLIP: 35 mm2: 5 x 7 (LQFN-CLIP | 40)    
TPS546A24A Samples not available 2.95     18     0.25     5.5     10     1     225     1500     9     Adaptive/Dynamic Voltage Scaling
Adjustable Current Limit
Differential Remote Sense
Enable
Forced PWM
Frequency Synchronization
Over Current Protection
PMBus
Phase Interleaving
Power Good
Pre-Bias Start-Up
Soft Start Adjustable
Synchronous Rectification
UVLO Adjustable
Voltage Margining    
Current Mode     85     -40 to 150     LQFN-CLIP | 40     Catalog     Converter     40LQFN-CLIP: 35 mm2: 5 x 7 (LQFN-CLIP | 40)    
TPS546B24A Samples not available 2.95     18     0.25     5.5     20     1     225     1500     9     Adaptive/Dynamic Voltage Scaling
Adjustable Current Limit
Differential Remote Sense
Enable
Forced PWM
Frequency Synchronization
Over Current Protection
PMBus
Phase Interleaving
Power Good
Pre-Bias Start-Up
Soft Start Adjustable
Synchronous Rectification
UVLO Adjustable
Voltage Margining    
Current Mode     85     -40 to 150     LQFN-CLIP | 40     Catalog     Converter     40LQFN-CLIP: 35 mm2: 5 x 7 (LQFN-CLIP | 40)