TPS40425 Dual Output, 2-Phase, Stackable PMBUS Synchronous Buck Driverless Controller | TI.com

TPS40425 (ACTIVE)

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

 

Description

The TPS40425 is a PMBus, synchronous buck, driverless controller. It operates in non-smart power mode in factory default setting, and it can operate in smart power mode after PMBus programming and power reboot. It can be configured as dual-output or 2-phase. 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 TPS40425 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.

Features

  • Non-Smart Power Mode in Factory Default
  • Pin-for-Pin Equivalent to TPS40428 – 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
    (0.5-V to 1.5-V Range)
  • Fast Transient Response
  • Stackable up to Four Phases
    • 2-, 3-, or 4-Phase Interleaved Phase Shifts
    • Accurate Current Sharing
  • PMBus™ Interface Capability
    • Margining Up or Down with 2-mV Step
    • Programmable Fault Limit and Response
    • ±0.8% VOUT
    • Accuracy Current Monitoring
    • ±4.5°C External Temperature Monitoring with x3904
    • 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
  • Inductor DCR Current Sensing
  • 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
  • Support for TI Power Stage

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Parametrics Compare all products in Buck controllers (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
Type
Control mode
TPS40425 TPS40422 TPS40428 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
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
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
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     -40 to 125     -40 to 125    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
VQFN | 40     VQFN | 40
WQFN | 40    
VQFN | 40     WQFN | 40     WQFN | 40     WQFN | 40    
Controller     Controller     Controller     Controller     Controller     Controller    
Voltage Mode     Voltage Mode     Voltage Mode     D-CAP+     D-CAP+     D-CAP+    

Design tool

 WEBENCH® Designer TPS40425
  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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