Dual Output, 2-Phase, Stackable PMBus Synchronous Buck Driverless Controller   - TPS40428

TPS40428 (ACTIVE)

Dual Output, 2-Phase, Stackable PMBus Synchronous Buck Driverless Controller

 

Description

The TPS40428 device is a PMBus, synchronous buck, driverless controller. It operates in smart power mode with factory default settings, and it can operate in non-smart power mode after PMBus programing and power reboot. It can be configured for dual-output or 2-phase operation. It is also stackable up to 4 phases to support load current as high as 120 A. Interleaved phase shift for 2-. 3-, or 4-phases reduce the input and output ripples therefore reducing input and output capacitance.

The wide input voltage range can support 5-V and 12-V intermediate supply buses. The 0.5% reference voltage satisfies the need of precision voltage to the modern ASICs.

Using the PMBus standard, the TPS40428 device can program reference voltage, fault limit, UVLO threshold, soft-start time and turn-on and turn-off delay.

In addition, the device implements an accurate measurement system to monitor the output voltages, currents and temperatures for individual channels.

For all available packages, see the orderable addendum at the end of the data sheet.

Features

  • Smart Power Mode in Factory Default (Compatible with TI Smart Power Stage CSD95378B and Pin-for-Pin Equivalent to TPS40425 – Non-Smart Power Mode in Factory Default)
  • Single Supply Operation: 4.5 V to 20 V
  • VOUT from 0.6 V
  • Dual or Multi-Phase Synchronous Buck Controller
  • Individual High-Speed AVS Interface
  • Fast Transient Response
  • Stackable up to Four Phases
    • 2-, 3-, or 4-Phase Interleaved Phase Shifts
    • Accurate Current Sharing
  • PMBus Interface Capability
    • Margining Up/Down with 2-mV Step
    • Programmable Fault Limit and Response
    • ±0.8% VOUT
    • Accuracy Current Monitoring
    • ±3°C External Temperature Monitoring In Smart Power Mode
    • Programmable UVLO ON/OFF Thresholds
    • Programmable Soft-Start Time, Turn-On Delay, and Turn-Off Delay
  • On-Chip Non-Volatile Memory (NVM) to Store Custom Configurations
  • 0.6-V Reference Voltage with 0.5% Accuracy from –40°C to 125°C
  • Programmable ƒSW from 200 kHz to 1.5 MHz
  • Supports Pre-biased Output
  • Differential Remote Sensing
  • Synchronization to an Extermal Clock
  • OC/OV/UV/OT Fault Protection
  • 40-Pin, 6 mm × 6 mm, QFN Package

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Parametrics Compare all products in Buck Controller (External Switch)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Number of Phases
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
Control Mode
TPS40428 TPS40422 TPS40425 TPS53647 TPS53667 TPS53681
4.5    4.5    4.5    4.5    4.5    4.5   
20    20    20    17    17    17   
0.6    0.6    0.6    0.5    0.5    0.25   
5    5.6    5    2.5    2.5    2.8125   
40    60    40    240    420    300   
2    2    2    1    1    2   
2    2    2    4    6    8   
200    200    200    300    300    300   
1500    1000    1500    1000    1000    1000   
18    18    18    8    6.1    13   
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Frequency Synchronization
PMBus
Phase Interleaving
Power Good
Pre-Bias Start-Up
Remote Sense
Synchronous Rectification
UVLO Adjustable
Voltage Margining   
Dynamic Voltage Scaling
Enable
Frequency Synchronization
Multiple Outputs
PMBus
Phase Interleaving
Remote Sense   
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Frequency Synchronization
Phase Interleaving
Power Good
Pre-Bias Start-Up
Remote Sense
Synchronous Rectification
UVLO Adjustable
Voltage Margining   
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
PMBus
Phase Interleaving
Power Good
Pre-Bias Start-Up
Remote Sense
Synchronous Rectification
UVLO Adjustable
Voltage Margining   
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
PMBus
Phase Interleaving
Power Good
Pre-Bias Start-Up
Remote Sense
Synchronous Rectification
UVLO Adjustable
Voltage Margining   
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Multiple Outputs
PMBus
Phase Interleaving
Power Good
Pre-Bias Start-Up
Remote Sense
Synchronous Rectification
UVLO Adjustable
Voltage Margining   
46    90    46    50    50    50   
  -40 to 125      -40 to 125    -40 to 125    -40 to 125   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
VQFN    VQFN
WQFN   
VQFN    WQFN    WQFN    WQFN   
Voltage Mode    Voltage Mode    Voltage Mode    D-CAP+    D-CAP+    D-CAP+   
 WEBENCH® Designer TPS40428
  Min   Max Range
Vin  V 4.50 to 16.00V
 
Vout1  V 0.60 to 4.50V
Iout1  A ≤ 30.00A
 
Vin2  V 4.50 to 15.00V
Vout2  V 0.60 to 4.50V
Iout2  A ≤ 30.00A
 
Ambient Temp  °C ≤ 100°C

  Min   Max Range
Vin  V 4.50 to 16.00V
 
Vout  V 0.60 to 4.50V
Iout  A ≤ 60.00A
 
Ambient Temp  °C ≤ 100°C


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