TPS40322

VQFN (RHB)

32

25 mm² 5 x 5

Dual-Output or Two-Phase Synchronous Buck
Controller
180° Out-of-Phase Reduces Input Ripple
Input Voltage Range: 3 V to 20 V
Output Voltage Range: 0.6 V to 5.6 V
Adjustable Frequency: 100 kHz to 1 MHz
Bidirectional SYNC Pin With 0°/180° or 90°/270°
Phase Shift
Voltage Mode Control With Input Feedforward
Accurate Current Sharing for Two-Phase
Operation
Individual Power Good Outputs
Individual Enable and Programmable Soft Start,
With Pre-Bias Start-Up
±0.5%, 600-mV Reference
Output UV/OV Protection and Input Undervoltage
Lockout
Individual Overcurrent Limit Setting
Hiccup Overcurrent Protection
Accurate Inductor DCR or Resistive Current
Sensing
Remote Sense for Two-Phase Applications
Internal N-Channel FET Drivers
Integrated Bootstrap Switches
Available in 5-mm × 5-mm 32-Pin VQFN Package

Dual-Output or Two-Phase Synchronous Buck
Controller
180° Out-of-Phase Reduces Input Ripple
Input Voltage Range: 3 V to 20 V
Output Voltage Range: 0.6 V to 5.6 V
Adjustable Frequency: 100 kHz to 1 MHz
Bidirectional SYNC Pin With 0°/180° or 90°/270°
Phase Shift
Voltage Mode Control With Input Feedforward
Accurate Current Sharing for Two-Phase
Operation
Individual Power Good Outputs
Individual Enable and Programmable Soft Start,
With Pre-Bias Start-Up
±0.5%, 600-mV Reference
Output UV/OV Protection and Input Undervoltage
Lockout
Individual Overcurrent Limit Setting
Hiccup Overcurrent Protection
Accurate Inductor DCR or Resistive Current
Sensing
Remote Sense for Two-Phase Applications
Internal N-Channel FET Drivers
Integrated Bootstrap Switches
Available in 5-mm × 5-mm 32-Pin VQFN Package

The TPS40322 device is a dual-output, synchronous buck controller. It can also be configured as a single-output, two-phase controller. The 180° out-of-phase operation reduces the input current ripple and extends the input capacitor lifetime. Bidirectional master and slave synchronization function provides evenly distributed phase shift for a four-output system that reduces input ripple further and attenuates the system noise.

The wide input range can support 3.3-V, 5-V, and 12-V buses. The accurate reference voltage satisfies the precision voltage needed by ASICs and potentially reduces the output capacitance requirement. Separate PGOOD signals provide flexibility for system monitoring and sequencing. The two channels are independently controlled and each soft-start time is programmable. Voltage mode control is implemented to reduce noise sensitivity and also ensures low duty ratio conversion.

The TPS40322 device is a dual-output, synchronous buck controller. It can also be configured as a single-output, two-phase controller. The 180° out-of-phase operation reduces the input current ripple and extends the input capacitor lifetime. Bidirectional master and slave synchronization function provides evenly distributed phase shift for a four-output system that reduces input ripple further and attenuates the system noise.

The wide input range can support 3.3-V, 5-V, and 12-V buses. The accurate reference voltage satisfies the precision voltage needed by ASICs and potentially reduces the output capacitance requirement. Separate PGOOD signals provide flexibility for system monitoring and sequencing. The two channels are independently controlled and each soft-start time is programmable. Voltage mode control is implemented to reduce noise sensitivity and also ensures low duty ratio conversion.

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Technical documentation

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	Type	Title	Date
*	Data sheet	TPS40322 Dual Output or Two-Phase Synchronous Buck Controller datasheet (Rev. E)	07 Jan 2016
	Application note	Multiphase Buck Design from Start to Finish, Part 1 (Rev. B)	07 Apr 2021
	Application note	Implementing Output Voltage Offset in the TPS40322	23 Nov 2020
	Selection guide	Power Management Guide 2018 (Rev. R)	25 Jun 2018
	Application note	SMT Guidelines for Stacked Inductor (Inductor On Top) on Voltage Regulator IC	22 Feb 2016
	User guide	Using the TPS40322EVM-074	05 Apr 2012
	User guide	Using the TPS40322EVM-679	04 May 2011

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS40322EVM-074 — Evaluation Module for TPS40322 Dual Output or Two-phase Synchronous Buck Controller

The Texas Instruments TPS40322EVM-074 evaluation module (EVM) helps designers evaluate the performance of the TPS40322 Dual Output or Two-phase Synchronous Buck Controller. The EVM is designed to use a regulated 4.5Vdc to 15.0Vdc bus to produce a single dual phase 1.2Vdc regulated output at 30A of (...)

User guide

In stock

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Evaluation board

TPS40322EVM-679 — Evaluation Module for TPS40322 Dual Output or Two-phase Synchronous Buck Controller

The TPS40322EVM-679 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS40322 Dual Output or Two-phase Synchronous Buck Controller. The EVM is designed to use a regulated 8.0Vdc to 15.0Vdc bus to produce two high current, regulated outputs, one at 1.2Vdc and the (...)

User guide

In stock

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Simulation model

TPS40322 PSpice Transient Model

SLUM168.ZIP (161 KB) - PSpice Model

Simulation model

TPS40322 TINA-TI Reference Design

SLUM325.TSC (756 KB) - TINA-TI Reference Design

Simulation model

TPS40322 TINA-TI Transient Spice Model

SLUM326.ZIP (118 KB) - TINA-TI Spice Model

Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)

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Calculation tool

Type III Compensation Calculation Tool (Rev. E)

SLUC263E.ZIP (185 KB)

Calculation tool

TPS40322 Resistor Divider Vout Offset Calculator

SLURAZ4.ZIP (37 KB)

Reference designs

PMP20516 — 5V 45A Dual Phase Synchronous Buck Reference Design

This is a synchronous buck reference design that uses TPS40322 in a dual phase topology. It is meant for 12V nominal input voltage and outputs 5V and is capable of providing up to 45A combined on both phases with excellent current sharing. The full load efficiency is 96.7% which provides great (...)

Schematic

Reference designs

PMP20054 — Dual Phase Synchronous Buck Converter for 40 A Vcore Rail Reference Design

The PMP20054 converts a 5 V input to a 0.85 V output @ 40 A (2 Phase) using the TPS40322. The output capacitors are all ceramic for a cost effective and small solution.

Schematic

Reference designs

PMP8703 — Dual Buck with 5V @ 7A and 3.3V @ 4A Reference Design

This design is a dual buck for 12V input voltage which provides 5.0V @ 7.0A and 3.3V @ 4.0A. TIs CSD86330Q3D Power Blocks enable a high efficiency even at high switching frequencies.

Reference designs

PMP8962 — 12V input, Compact Dual 5V/5.5A Point-of-Load using NexFET Power Block II Reference Design

PMP8962 is a compact dual 5.5A POL solution in 0.63" by 0.74" size. It showcases CSD87381P power block II with high efficiency and excellent thermal performnce. It has programmable frequency, soft-start, external compensation, adjustable current limit and OCP/OVP/OTP features. It is suitable for (...)