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

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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
TPS40422 TPS40322 TPS40400 TPS40425 TPS40428 TPS53647 TPS53667 TPS53681
4.5     3     3     4.5     4.5     4.5     4.5     4.5    
20     20     20     20     20     17     17     17    
0.6     0.6     0.6     0.6     0.6     0.5     0.5     0.25    
5.6     5.6     5     5     5     2.5     2.5     2.8125    
60     60     30     40     40     240     420     300    
2     2     1     2     2     1     1     2    
2     2     1     2     2     4     6     8    
200     100     200     200     200     300     300     300    
1000     1000     2000     1500     1500     1000     1000     1000    
18     6     6     18     18     8     6.1     13    
Dynamic Voltage Scaling
Enable
Frequency Synchronization
Multiple Outputs
PMBus
Phase Interleaving
Remote Sense    
Enable
Frequency Synchronization
Multiple Outputs
Phase Interleaving
Power Good
Remote Sense    
Dynamic Voltage Scaling
Enable
Frequency Synchronization
PMBus
Power Good
Pre-Bias Start-Up
Remote Sense
Synchronous Rectification
Tracking    
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
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    
90     95     90     46     46     50     50     50    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
VQFN | 40
WQFN | 40    
VQFN | 32     VQFN | 24     VQFN | 40     VQFN | 40     WQFN | 40     WQFN | 40