TPS40001DGSTR [TI]

TPS40000, TPS40001

TPS40002, TPS40003

TPS40004, TPS40005

SLUS507C − JANUARY 2002 − REVISED JUNE 2004

LOW INPUT VOLTAGE MODE

SYNCHRONOUS BUCK CONTROLLER

FEATURES

D

Operating Input Voltage 2.25 V to 5.5 V

D

Output Voltage as Low as 0.7 V

D

1% Internal 0.7 V Reference

D

Predictive Gate Drivet N-Channel MOSFET

D

D

D

D

D

D

D

Drivers for Higher Efficiency

Externally Adjustable Soft-Start and

Overcurrent Limit

Source-Only Current or Source/Sink Current

Versions for Starting Into V

OUT

Pre-Bias

10-Lead MSOP PowerPadt Package for

Higher Performance

Thermal Shutdown

Internal Boostrap Diode

Fixed-Frequency, Voltage-Mode Control

− TPS40000/1/4 300-kHz

− TPS40002/3/5 600-kHz

APPLICATIONS

D

Networking Equipment

D

Telecom Equipment

D

Base Stations

D

Servers

D

DSP Power

D

Power Modules

DESCRIPTION

The TPS4000x are controllers for low-voltage,

non-isolated synchronous buck regulators. These

controllers drive an N-channel MOSFET for the

primary buck switch, and an N-channel MOSFET

for the synchronous rectifier switch, thereby

achieving very high-efficiency power conversion. In

addition, the device controls the delays from main

switch off to rectifier turn-on and from rectifier

turn-off to main switch turn-on in such a way as to

minimize diode losses (both conduction and

recovery) in the synchronous rectifier with TI’s

proprietary Predictive Gate Drivet technology. The

reduction in these losses is significant and increases

efficiency. For a given converter power level, smaller

FETs can be used, or heat sinking can be reduced

or even eliminated.

SIMPLIFIED APPLICATION DIAGRAM

VIN

TPS40000

1

2

3

4

ILIM

FB

COMP

SW

SS/SD

VDD

5

GND

LDRV

7

6

8

BOOT 10

HDRV

9

VOUT

UDG−01141

PowerPADt and Predictive Gate Drivet are trademarks of Texas Instruments Incorporated.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright



2002, Texas Instruments Incorporated

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1

SLUS507C − JANUARY 2002 − REVISED JUNE 2004

TPS40000, TPS40001

TPS40002, TPS40003

TPS40004, TPS40005

DESCRIPTION (continued)

The current-limit threshold is adjustable with a single resistor connected to the device. The TPS4000x

controllers implement a closed-loop soft start function. Startup ramp time is set by a single external capacitor

connected to the SS/SD pin. The SS/SD pin is also used for shutdown.

ORDERING INFORMATION

PACKAGED DEVICES MSOP

(2)

(DGQ)

APPLICATION

TA

−40°C to 85°C

(2)

(3)

FREQUENCY

300 kHz

600 kHz

SOURCE

ONLY

TPS40000DGQ

TPS40002DGQ

SOURCE/SINK

WITH PREBIAS

(3)

TPS40001DGQ

TPS40003DGQ

SOURCE/SINK

(3)

TPS40004DGQ

TPS40005DGQ

The DGQ package is available taped and reeled. Add R suffix to device type (e.g.

TPS40000DGQR) to order quantities of 2,500 devices per reel and 80 units per tube.

See Application Information section, p. 8.

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range unless otherwise noted(1)

TPS4000x

BOOT

COMP, FB, ILIM, SS/SD

Input voltage range, VIN

SW

SWT (SW transient < 50 ns)

VDD

Operating junction temperature range, TJ

Storage temperature, Tstg

VSW + 6.5

−0.3 to 6

−0.7 to 10.5

−2.5

6

−40 to 150

−55 to 150

°C

C

V

UNIT

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds

260

(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”

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

DGQ PACKAGE

(4).(5

)

(TOP VIEW)

ILIM

FB

COMP

SS/SD

GND

1

2

3

4

5

10

9

8

7

6

BOOT

HDRV

SW

VDD

LDRV

ACTUAL SIZE

3,05mm x 4,98mm

(4)

(5)

See technical brief SLMA002 for PCB guidelines for PowerPAD packages.

PowerPADt heat slug can be connected to GND (pin 5).

2

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SLUS507C − JANUARY 2002 − REVISED JUNE 2004

TPS40000, TPS40001

TPS40002, TPS40003

TPS40004, TPS40005

ELECTRICAL CHARACTERISTICS

over recommended operating temperature range, T

A

= −40_C to 85_C, V

DD

= 5.0 V, all parameters measured at zero

power dissipation (unless otherwise noted)

input supply

PARAMETER

VDD

VHGATE

IDD

UVLO

Input voltage range

High-side gate voltage

Shutdown current

Quiescent current

Switching current

Minimum on-voltage

Hysteresis

VBOOT − VSW

SS/SD = 0 V,

FB = 0.8 V

No load at HDRV/LDRV

1.95

80

Outputs off

TEST CONDITIONS

MIN

2.25

0.25

1.4

1.5

2.05

140

TYP

MAX

5.5

5.5

0.45

2.0

4.0

2.15

200

V

mV

mA

V

UNIT

oscillator

PARAMETER

TPS40000

TPS40001

TPS40004

fOSC

Oscillator frequency

TPS40002

TPS40003

TPS40005

TEST CONDITIONS

MIN

250

2.25 V

≤

VDD

≤

5.00 V

500

VPEAK − VVALLEY

0.80

0.24

600

0.93

0.31

700

1.07

0.41

V

TYP

300

MAX

350

kHz

UNIT

VRAMP

Ramp voltage

Ramp valley voltage

PWM

PARAMETER

TPS40000

TPS40001

TPS40004

TPS40002

TPS40003

TPS40005

FB = 0 V,

VDD = 3.3 V

83%

93%

97%

0%

TEST CONDITIONS

MIN

87%

TYP

94%

MAX

97%

UNIT

Maximum duty cycle(2)

Minimum duty cycle

error amplifier

PARAMETER

Line,

VFB

FB input voltage

FB input bias current

VOH

VOL

IOH

IOL

GBW

High-level output voltage

Low-level output voltage

Output source current

Output sink current

Gain bandwidth(1)

FB = 0 V,

FB =VDD,

COMP = 0.7 V,

COMP = 0.7 V,

IOH = 0.5 mA

IOL = 0.5 mA

FB = GND

FB = VDD

2.0

2

3

5

55

TA = 25°C

TEST CONDITIONS

Temperature

MIN

0.689

0.693

TYP

0.700

0.700

30

2.5

0.08

6

8

10

85

mA

MHz

dB

0.15

V

MAX

0.711

0.707

130

V

nA

UNIT

AOL

Open loop gain

(1) Ensured by design. Not production tested.

(2) At VDD input voltage of 2.25 V, derate the maximum duty cycle by 3%.

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3

SLUS507C − JANUARY 2002 − REVISED JUNE 2004

TPS40000, TPS40001

TPS40002, TPS40003

TPS40004, TPS40005

ELECTRICAL CHARACTERISTICS

over recommended operating temperature range, T

A

= −40_C to 85_C, V

DD

= 5.0 V, all parameters measured at zero

power dissipation (unless otherwise noted)

current limit

PARAMETER

ISINK

VOS

VILIM

tON

ILIM sink current

Offset voltage SW vs ILIM(1)

Input voltage range

Minimum HDRV pulse time in overcurrent

SW leading edge blanking pulse in over-

current detection

tSS

Soft-start capacitor cycles as fault timer(1)

VDD = 3.3 V

TEST CONDITIONS

VDD = 5 V

VDD = 2.25 V

2.25 V

≤

VDD

≤

5.00

MIN

11

9.5

−20

2

200

100

6

TYP

15

13.0

0

MAX

19

16.5

20

VDD

300

UNIT

µA

A

mV

V

ns

ns

rectifier zero current comparator

PARAMETER

VSW

Sense voltage to turn off

rectifier

TPS40000

TPS40002

TEST CONDITIONS

LDRV output OFF

MIN

−15

TYP

−7

75

MAX

−2

UNIT

mV

ns

SW leading edge blanking pulse in zero

current detection

predictive delay

PARAMETER

VSWP

TLDHD

THDLD

Sense threshold to modulate delay time

Maximum delay modulation range time

Predictive counter delay time per bit

Maximum delay modulation range

Predictive counter delay time per bit

LDRV OFF − to − HDRV ON

LDRV OFF − to − HDRV ON

HDRV OFF − to − LDRV ON

HDRV OFF − to − LDRV ON

50

3.0

40

2.4

TEST CONDITIONS

MIN

TYP

−350

75

4.5

65

4.0

100

6.2

90

5.6

MAX

UNIT

mV

ns

ns

ns

ns

shutdown

PARAMETER

VSD

VEN

Shutdown threshold voltage

Device active threshold voltage

TEST CONDITIONS

Outputs OFF

MIN

0.09

0.14

TYP

0.13

0.17

MAX

0.18

0.21

UNIT

V

V

soft start

PARAMETER

ISS

VSS

Soft-start source current

Soft-start clamp voltage

TEST CONDITIONS

Outputs OFF

MIN

2.0

1.1

TYP

3.7

1.5

MAX

5.4

1.9

UNIT

µA

V

bootstrap

PARAMETER

RBOOT

(1)

(2)

Bootstrap switch resistance

TEST CONDITIONS

VDD = 3.3 V

VDD = 5 V

MIN

TYP

50

35

MAX

100

70

UNIT

Ω

Ensured by design. Not production tested.

At VDD input voltage of 2.25 V, derate the maximum duty cycle by 3%.

4

www.ti.com

SLUS507C − JANUARY 2002 − REVISED JUNE 2004

TPS40000, TPS40001

TPS40002, TPS40003

TPS40004, TPS40005

ELECTRICAL CHARACTERISTICS

over recommended operating temperature range, T

A

= −40_C to 85_C, V

DD

= 5.0 V, all parameters measured at zero

power dissipation (unless otherwise noted)

output driver

PARAMETER

RHDHI

RHDLO

RLDHI

RLDLO

tRISE

tFALL

HDRV pull-up resistance

HDRV pull-down resistance

LDRV pull-up resistance

LDRV pull-down resistance

LDRV rise time

LDRV fall time

HDRV rise time

HDRV fall time

CLOAD = 1 nF

TEST CONDITIONS

VBOOT−VSW = 3.3 V,

ISOURCE = −100 mA

VBOOT − VSW = 3.3 V,

ISINK = 100 mA

VDD = 3.3 V,

VDD = 3.3 V,

ISOURCE = −100 mA

ISINK = 100 mA

MIN

TYP

3

1.5

3

1.0

15

10

15

10

MAX

5.5

3

5.5

2.0

35

25

35

25

ns

Ω

UNIT

thermal shutdown

PARAMETER

tSD

Shutdown temperature(1)

Hysteresiss(1)

TEST CONDITIONS

MIN

TYP

165

15

MAX

UNIT

°C

sw node

PARAMETER

ISW

Leakage current in shutdown (1)

(1) Ensured by design. Not production tested.

(2)

At VDD input voltage of 2.25 V, derate the maximum duty cycle by 3%.

TEST CONDITIONS

MIN

TYP

15

MAX

UNIT

µA

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