Input Voltage

PGND

SW1

VIN1

VBST1

EN1

VFB2

VFB1

GND

VREG5

PGND1

VIN2

VBST2

EN2

SW2

PG1

PG2

PGND2

TPS54394

HTSSOP16

PGND

SGND

C11

VO1

C21

R11

R21

L11

C31

C32

L12

C12

VO2

C22

R12

R22

(PowerPAD)

TPS54394

www.ti.com

SLVSBE6 –JUNE 2012

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

Check for Samples: TPS54394

FEATURES

APPLICATIONS

• 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 mΩ (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

• Low-Side r

DS(on)

Loss-Less Current Sensing

TPS54394 use the D-CAP2™ mode control which

• Fixed Soft Start : 1.0ms

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

DS(on)

with 4000ppm/℃℃

The TPS54394 is available in a 4.4mm×5.0mm 16 pin

TSSOP (PWP) package, and is specified for an

• 16-Pin HTSSOP

ambient temperature range from –40°C to 85°C.

• Auto-Skip Eco-mode™　　for High Efficiency at

Light Load

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.

2D-CAP2, Eco-mode, Eco-Mode are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

TPS54394

SLVSBE6 –JUNE 2012

www.ti.com

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

ORDERING INFORMATION

(1)

PACKAGE

(2) (3)

ORDERING PART NUMBER PINS OUTPUT SUPPLY

TPS54394PWPR Tape-and-Reel

–40℃ to 85℃ PWP 16

TPS54394PWP Tube

(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com

(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

(3) All packaging options have Cu NIPDAU lead/ball finish.

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range (unless otherwise noted)

(1) (2)

VALUE UNIT

VIN1, VIN2, EN1, EN2 –0.3 to 20

VBST1, VBST2 –0.3 to 26

VBST1, VBST2 (10ns transient) –0.3 to 28

Input voltage range VBST1–SW1 , VBST2–SW2 –0.3 to 6.5 V

VFB1, VFB2 –0.3 to 6.5

SW1, SW2 –2 to 20

SW1, SW2 (10ns transient) –3 to 22

VREG5, PG1, PG2 –0.3 to 6.5

Output voltage range V

PGND1, PGND2 –0.3 to 0.3

Human Body Model (HBM) 2 kV

Electrostatic discharge

Charged Device Model (CDM) 500 V

Operating ambient temperature range –40 to 85 °C

STG

Storage temperature range –55 to 150 °C

Junction temperature range –40 to 150 °C

(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings

only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating

conditions" are not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2) All voltages are with respect to IC GND terminal.

THERMAL INFORMATION

TPS54394

THERMAL METRIC

(1)

UNITS

PWP (16) PINS

Junction-to-ambient thermal resistance 47.5

JCtop

Junction-to-case (top) thermal resistance 27.1

Junction-to-board thermal resistance 20.8

°C/W

Junction-to-top characterization parameter 1.0

Junction-to-board characterization parameter 20.6

JCbot

Junction-to-case (bottom) thermal resistance 2.7

(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

Product Folder Link(s) :TPS54394

TPS54394

www.ti.com

SLVSBE6 –JUNE 2012

RECOMMENDED OPERATING CONDITIONS

over operating free-air temperature range (unless otherwise noted)

VALUES

UNIT

MIN MAX

Supply input voltage range VIN1, VIN2 4.5 18 V

VBST1, VBST2 –0.1 24

VBST1, VBST2 (10ns transient) –0.1 27

VBST1–SW1, VBST2–SW2 –0.1 5.7

Input voltage range VFB1, VFB2 –0.1 5.7 V

EN1, EN2 –0.1 18

SW1, SW2 –1.0 18

SW1, SW2 (10ns transient) –3 21

VREG5, PG1 , PG2 –0.1 5.7

Output voltage range PGND1, PGND2 –0.1 0.1 V

VO1, VO2 0.76 7.0

Operating free-air temperature –40 85 °C

Operating Junction Temperature –40 150 °C

ELECTRICAL CHARACTERISTICS

(1)

over recommended free-air temperature range, VIN = 12 V (unless otherwise noted)

PARAMETER CONDITIONS MIN TYP MAX UNIT

SUPPLY CURRENT

= 25°C, EN1 = EN2 = 5 V,

VIN supply current 1200 2000 µA

VFB1 = VFB2 = 0.8 V

VINSDN

VIN shutdown current T

= 25°C, EN1 = EN2 = 0 V, 15 20 µA

FEEDBACK VOLTAGE

VFBTHLx

VFBx threshold voltage T

= 25°C, CH1 = 3.3 V, CH2 = 1.5 V 758 765 773 mV

VFBx

Temperature coefficient On the basis of 25°C

(2)

–115 115 ppm/℃

VFBx

VFB Input Current VFBx = 0.8 V, T

= 25°C –0.4 0.2 0.4 µA

VREG5 OUTPUT

= 25°C, 6 V < VIN1 < 18 V,

VREG5

VREG5 output voltage 5.5 V

VREG

= 5 mA

VIN1 = 6 V, VREG5 = 4.0 V,

VREG5

Output current 75 mA

= 25°C

(2)

MOSFETs

DS(on)H

High side switch resistance T

= 25℃, VBSTx-SWx = 5.5 V

(2)

90 mΩ

DS(on)L

Low side switch resistance T

= 25℃

(2)

60 mΩ

ON-TIME TIMER CONTROL

ON1

SW1 On Time SW1 = 12 V, VO1 = 1.2 V 165 ns

ON2

SW2 On Time SW2 = 12 V, VO2 = 1.2 V 165 ns

OFF1

SW1 Min off time T

= 25℃, VFB1 = 0.7 V

(2)

220 ns

OFF2

SW2 Min off time T

= 25℃, VFB2 = 0.7 V

(2)

220 ns

SOFT START

Soft-start time Internal soft-start time 1.0 ms

(1) x means either 1 or 2, e.g. VFBx means VFB1 or VFB2.

(2) Ensured by design. Not production tested.

Product Folder Link(s) :TPS54394

Part #	54-394
Description
Category	SWITCH
Availability	Out of Stock
Qty	0

54-394

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