TPS40422 Dual Output or Multiphase Synchronous Buck Controller with PMBus | TI.com

TPS40422 (ACTIVE)

Dual Output or Multiphase Synchronous Buck Controller with PMBus

 

Description

The TPS40422 is a dual-output PMBus protocol, synchronous buck controller. It can be configured also for a single, two-phase output.

The wide input range supports 5-V and 12-V intermediate buses. The accurate reference voltage satisfies the need of precision voltage to the modern ASICs and potentially reduces the output capacitance. Voltage mode control reduces noise sensitivity and also ensures low duty ratio conversion.

Using the PMBus protocol, the device margining function, reference voltage, fault limit, UVLO threshold, soft-start time, turn-on delay, and turn-off delay can be programmed.

In addition, an accurate measurement system is implemented to monitor the output voltages, currents and temperatures for each channel.

Features

  • Single Supply Operation: 4.5 V to 20 V
  • Output Voltage from 0.6 V to 5.6 V
  • Dual-output or Two-Phase Synchronous Buck Controller
  • PMBus™ Interface Capability
    • Margining Up or Down with 2-mV Step
    • Programmable Fault Limit and Response
    • Output Voltage, Output Current Monitoring
    • External Temperature Monitoring with 2N3904 Transistor
    • Programmable UVLO ON and OFF Thresholds
    • Programmable Soft-start Time and Turn-On and Turn-Off Delay
  • On-Chip Non-volatile Memory (NVM) to Store Custom Configurations
  • 180° Out-of-Phase to Reduce Input Ripple
  • 600-mV Reference Voltage with ±0.5% Accuracy from 0°C to 85°C
  • Inductor DCR Current Sensing
  • Programmable Switching Frequency: 200 kHz to 1 MHz
  • Voltage Mode Control with Input Feed Forward
  • Current Sharing for Multiphase Operation
  • Supports Pre-biased Output
  • Differential Remote Sensing
  • External SYNC
  • BPEXT Pin Boosts Efficiency by Supporting External Bias Power Switch Over
  • OC, OV, UV, and OT Fault Protection
  • 40-Pin, 6 mm × 6 mm VQFN Package with 0.5-mm Pitch
  • 40-Pin, 5 mm × 5 mm WQFN Package with 0.4-mm Pitch

WEBENCH® Designer TPS40422

  Min   Max Range
Vin  V 4.50 to 15.00V
 
Vout1  V 0.70 to 5.80V
Iout1  A ≤ 20.00A
 
Vin2  V 4.50 to 15.00V
Vout2  V 0.70 to 5.80V
Iout2  A ≤ 20.00A
 
Ambient Temp  °C -40 to 125°C

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 (#) 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
TPS40422 Order now 4.5     20     0.6     5.6     60     2     2     200     1000     18     Dynamic Voltage Scaling
Enable
Frequency Synchronization
Multiple Outputs
PMBus
Phase Interleaving
Remote Sense    
90     -40 to 125     Catalog     VQFN | 40
WQFN | 40    
Controller     Voltage Mode    
TPS40322 Order now 3     20     0.6     5.6     60     2     2     100     1000     6     Enable
Frequency Synchronization
Multiple Outputs
Phase Interleaving
Power Good
Remote Sense    
95     -40 to 125     Catalog     VQFN | 32     Controller     Voltage Mode    
TPS40400 Order now 3     20     0.6     5     30     1     1     200     2000     6     Dynamic Voltage Scaling
Enable
Frequency Synchronization
PMBus
Power Good
Pre-Bias Start-Up
Remote Sense
Synchronous Rectification
Tracking    
90     -40 to 125     Catalog     VQFN | 24     Controller     Voltage Mode    
TPS40425 Order now 4.5     20     0.6     5     40     2     2     200     1500     18     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    
46     -40 to 125     Catalog     VQFN | 40     Controller     Voltage Mode    
TPS40428 Order now 4.5     20     0.6     5     40     2     2     200     1500     18