Dual Output or Multiphase Synchronous Buck Controller with PMBus - TPS40422

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 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)
Special Features
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
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   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
VQFN
WQFN   		 VQFN    VQFN    VQFN    VQFN    WQFN    WQFN    WQFN   
Voltage Mode    Voltage Mode    Voltage Mode    Voltage Mode    Voltage Mode    D-CAP+    D-CAP+    D-CAP+   
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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

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