Input Voltage

PGND

PGND

C4

SW1

VIN1

VBST1

EN1

VFB2

VFB1

GND

VREG5

PGND1

6

VIN2

VBST2

EN2

SW2

PG1

5

1

3

PG2

9

10

11

PGND2

2

4

7

13

12

TPS54394

HTSSOP16

14

8

15

16

PGND

SGND

SGND

C11

VO1

C21

R11

R21

L11

C31

C32

L12

C12

VO2

C22

R12

R22

(PowerPAD)

TPS54394

www.ti.com

SLVSBE6B – JUNE 2012 – REVISED AUGUST 2013

3A Dual Channel Synchronous Step-Down Switcher with Integrated FET

Check for Samples: TPS54394

1

FEATURES

APPLICATIONS

2

•

D-CAP2™ Control Mode

•

Point-of-Load Regulation in Low Power

Systems for Wide Range of Applications

–

Fast Transient Response

–

Digital TV Power Supply

–

No External Parts Required For Loop

Compensation

–

Networking Home Terminal

–

Compatible with Ceramic Output

–

Digital Set Top Box (STB)

Capacitors

–

DVD Player/Recorder

•

Wide Input Voltage Range : 4.5 V to 18 V

–

Gaming Consoles and Other

•

Output Voltage Range : 0.76 V to 7 V

DESCRIPTION

•

Highly Efficient Integrated FETs Optimized for

The TPS54394 is a dual, adaptive on-time D-CAP2™

Low Duty Cycle Applications

mode synchronous buck converter. The TPS54394

–

90 m

Ω (High Side) and 60 mΩ (Low Side)

enables system designers to complete the suite of

•

High Initial Reference Accuracy

various end equipment’s power bus regulators with a

cost effective, low component count, and low standby

•

Supports Constant 3 A at Both Channels

current solution. The main control loops of the

•

TPS54394 use the D-CAP2™ mode control which

•

Fixed Soft Start : 1 ms

provides a very fast transient response with no

•

Non-Sinking Pre-Biased Soft Start

external compensation components. The adaptive on-

time control supports seamless transition between

•

Powergood

PWM mode at higher load conditions and Eco-

•

700 kHz Switching Frequency

mode™ operation at light loads. Eco-mode™ allows

•

Cycle-by-Cycle Over-Current Limit Control

the TPS54394 to maintain high efficiency during

lighter load conditions. The TPS54394 is able to

•

Hiccup Timer for Overload Protection

adapt to both low equivalent series resistance (ESR)

•

OCL/UVLO/TSD Protections

output capacitors such as POSCAP or SP-CAP, and

•

Adaptive Gate Drivers with Integrated Boost

ultra-low

ESR,

ceramic

capacitors.

The

device

PMOS Switch

provides convenient and efficient operation with input

voltages from 4.5V to 18V.

•

OCP Constant Due To Thermally Compensated

℃

The TPS54394 is available in a 4.4 mm × 5 mm 16-

pin TSSOP (PWP) and 4 mm x 4 mm 16-pin VQFN

•

16-Pin HTSSOP, 16-Pin VQFN

(RSA) package, and is specified for an ambient

•

Auto-Skip Eco-mode™

　

　for High Efficiency at

temperature range from –40°C to 85°C.

Light Load

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

D-CAP2, Eco-mode, Eco-Mode are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2012–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.