TPS40140 datasheet(6/68 Pages) TI1 | Dual or 2-Phase, Stackable Controller

Part #	TPS40140

Description	Dual or 2-Phase, Stackable Controller

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Manufacturer	TI1 [Texas Instruments]

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6 / 68 page

TPS40140

SLUS660I – SEPTEMBER 2005 – REVISED JANUARY 2015

www.ti.com

7.4 Thermal Information

TPS40140

RHH

THERMAL METRIC(1)

UNIT

(VQFN)

36 PINS

RθJA

Junction-to-ambient thermal resistance

30.8

RθJC(top)

Junction-to-case (top) thermal resistance

18.4

RθJB

Junction-to-board thermal resistance

5.9

°C/W

ψJT

Junction-to-top characterization parameter

0.2

ψJB

Junction-to-board characterization parameter

5.9

RθJC(bot)

Junction-to-case (bottom) thermal resistance

0.7

(1)

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

7.5 Electrical Characteristics

–40°C

≤ TJ ≤ 85°C, (unless otherwise noted), VVDD = 7 V, VBP5 = 5 V, UVLO_CE1, UCLO_CE2: 10 kΩ, Pullup to BP5,

ƒSW = 300 kHz, unless otherwise noted

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VDD INPUT SUPPLY

Operating voltage range

4.5

12

15

V

Shutdown current

UVLO_CE1 = UVLO_CE2 = GND

1

10

µA

BP5 INPUT SUPPLY

Operating voltage range

4.5

5.0

5.5

V

BP5 operating current

2

3

5

mA

Rising BP5 turnon

4.0

4.25

4.45

V

BP5 turnoff hysteresis

100

220

400

mV

Standby mode current(1)

UVLO_CEx = 1.7 V

2.8

mA

VREG

7 V < VDD < 15 V

4.5

5.1

5.5

V

Output current

0

100

mA

OSCILLATOR, RT

Phase frequency accuracy

RRT= 110 kΩ

300

kHz

Phase frequency set range

150

1000

kHz

RT(1)

25 k

Ω ≤ RRT ≤ 500 kΩ

0.7

V

UNDERVOLTAGE LOCKOUT (UVLO_CE1, UVLO_CE2)

Enable threshold, standby mode

Internal 5VREG regulator enabled

0.5

1.0

1.5

V

UVLO threshold

PWM Switching enabled

1.9

2

2.1

V

UVLO hysteresis

At the UVLO_CEx pin

40

mV

UVLO_CE1, UVLO_CE2 bias

1

μA

current(1)

PWM

2-phase, 4-phase, 8-phase, or 16-phase

87.5%

Maximum duty cycle per

DMAX

channel(1)

3-phase, 6-phase, or 12-phase

83.3%

tON(min)

Minimum controllable pulse width

70

ns

PWM COMPARATOR

Input offset voltage

–3

3

mV

VSHARE

IVSHR = 0

1.785

1.8

1.815

V

See(1)

–30

μA < iVSHR < 50 μA

1.785

1.8

1.815

V

(1)

Specified by design. Not production tested.

6

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