1

FEATURES

DESCRIPTION

APPLICATIONS

1

2

3

4

DROOP

VREF

GND

CSP1

TPS51727

RHA

5

6

7

8

CSN1

CSN2

CSP2

40

39

38

37

36

35

34

33

30

29

28

27

26

25

23

22

DRVH1

VBST

LL1

DRVL1

V5IN

PGND

DRVL2

LL2

L1

0.36 mH

C4

C11

1 mF

V

OUT

C1

1 mF

R5

R1

UDG-08003

VBAT

9

10

C8

GFB

VFB

THRM

R

T2

R6

VFB

R7

CSP1

CSN1

CSN2

CSP2

GFB

C6

VREF

32

31

24

21

11

12

13

14

15

16

17

18

19

20

VBST2

DRVH2

C

IN

C

OUT

+

L2

0.36 mH

Time Constant

and

Thermal Matching

CSP2

CSN2

C10

1 mF

PGND

Q4

Q1

Q2

Q3

VBAT

VREF

V5

V5

Time Constant

and

Thermal Matching

CSP1

CSN1

V

OUT

TPS51727

DUAL-PHASE, ECO-MODE™ STEP-DOWN POWER MANAGEMENT IC FOR 50-A+

APPLICATIONS

2

• Seamless Phase Add/Drop Enables Maximum

Efficiency Under Any Load Condition

The TPS51727 is a complete, step down controller

with integrated gate drivers. The PCNT pin enables

• Minimum External Parts Count

operation in dual or single-phase mode to optimize

• ±8 mV VOUT Accuracy Over Line/Load/Temp.

efficiency depending on the load requirements. The

• 5-Bit DAC with 0.4-V to 1.25-V Output Range

advanced

D-CAP+™

architecture

provides

fast

Supports Wide Range of Applications

transient response with minimum output capacitance.

The

DAC

supports

VID-on-the-fly

transitions

to

• Optimized Efficiency at Light & Heavy Loads

optimize the output voltage to the operating state of

• Patent Pending Output Overshoot Reduction

the system to meet idle power requirements. The

(OSR™)

auto-skip

feature

of

the

TPS51727

optimizes

• Accurate, Adjustable Voltage Positioning

light-load efficiency in both single and dual phase

operation. System management features include an

• Selectable 200/300/400/500 kHz Frequency

adjustable thermal sensor, output power monitoring

• Pat. pending AutoBalance™ Phase Balancing

and sleep state controls. Adjustable control of VOUT

• Supports Resistor or Inductor DCR Current

slew rate and voltage positioning are provided. In

Sensing

addition, the TPS51727 includes two high-current

MOSFET gate drivers to drive high and low side

• Accurate, Selectable Current Limit

N-channel MOSFETs with exceptionally high speed

• 4.5-V to 28-V Conversion Voltage Range

and low switching loss The PCNT and VID0 through

• Fast MOSFET Driver w/Integrated Boost Diode

VID4, pins have flexible LV I/O thresholds that enable

interface with logic voltages from 1.0 V to 3.6 V. The

• Integrated OVP Can Be Disabled Thermal

TPS51727 is packaged in a space saving, thermally

Sensor and Output Power Monitor

enhanced, RoHS compliant 40-pin QFN and is rated

• Small 6 × 6, 40-Pin QFN PowerPAD™ Package

to operate from –10

°C to 100°C.

• High-Current, Low-Voltage Applications for

Adapter, Battery, NVDC or 5-V/12-V Rails

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

ECO-MODE, OSR, AutoBalance, PowerPAD, D-CAP+, D-CAP+ are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008, 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.