22

21

30

28

13

14

8

7

CS2+

PG2

FB2

COMP2

LDRV1

PGND1

ILIM1

CS1+

TPS40322

27

4

5

2

1

32

10

SYNC

PHSET

EN/SS2

PG1

FB1

COMP1

RT

6

AGND

3

EN/SS1

12

CS2–

29

CS1–

31

24

25

23

UVLO

HDRV1

BOOT1

SW1

18

19

11

LDRV2

PGND2

ILIM2

16

15

17

HDRV2

BOOT2

SW2

20

BP6

26

VDD

3 V to 20 V

9

DIFFO

UDG-10215

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Reference

Design

TPS40322

SLUSAF8E – JULY 2011 – REVISED JANUARY 2016

TPS40322 Dual Output or Two-Phase Synchronous Buck Controller

1 Features

3 Description

The TPS40322 device is a dual-output, synchronous

1

•

Dual-Output or Two-Phase Synchronous Buck

buck controller. It can also be configured as a single-

Controller

output, two-phase controller. The 180° out-of-phase

•

180° Out-of-Phase Reduces Input Ripple

operation reduces the input current ripple and

•

Input Voltage Range: 3 V to 20 V

extends the input capacitor lifetime. Bidirectional

master and slave synchronization function provides

•

Output Voltage Range: 0.6 V to 5.6 V

evenly distributed phase shift for a four-output system

•

Adjustable Frequency: 100 kHz to 1 MHz

that reduces input ripple further and attenuates the

•

Bidirectional SYNC Pin With 0°/180° or 90°/270°

system noise.

Phase Shift

The wide input range can support 3.3-V, 5-V, and

•

Voltage Mode Control With Input Feedforward

12-V buses. The accurate reference voltage satisfies

•

Accurate Current Sharing for Two-Phase

the

precision

voltage

needed

by

ASICs

and

potentially

reduces

the

output

capacitance

Operation

requirement.

Separate

PGOOD

signals

provide

•

Individual Power Good Outputs

flexibility for system monitoring and sequencing. The

•

Individual Enable and Programmable Soft Start,

two channels are independently controlled and each

With Pre-Bias Start-Up

soft-start time is programmable. Voltage mode control

is implemented to reduce noise sensitivity and also

•

±0.5%, 600-mV Reference

ensures low duty ratio conversion.

•

Output UV/OV Protection and Input Undervoltage

Lockout

Device Information(1)

•

Individual Overcurrent Limit Setting

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Hiccup Overcurrent Protection

TPS40322

VQFN (32)

5.00 mm × 5.00 mm

•

Accurate Inductor DCR or Resistive Current

(1) For all available packages, see the orderable addendum at

Sensing

the end of the data sheet.

•

Remote Sense for Two-Phase Applications

Simplified Application Circuit

•

Internal N-Channel FET Drivers

•

Integrated Bootstrap Switches

•

Available in 5-mm × 5-mm 32-Pin VQFN Package

2 Applications

•

Multiple Rail Systems

•

Telecom Base Station

•

Switcher and Router Networking

•

xDSL Broadband Access

•

Server and Storage System

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.