TPS40422 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

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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

TPS40422 (ACTIVE)

Dual Output or Multiphase Synchronous Buck Controller with PMBus

Description

Features

WEBENCH® Designer TPS40422

Parametrics

WEBENCH^® Designer TPS40422