TPS43335QDAPRQ1 datasheet(6/42 Pages) TI1

No de pièce	TPS43335QDAPRQ1

Description	LOW IQ, SINGLE BOOST, DUAL SYNCHRONOUS BUCK CONTROLLER

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Fabricant	TI1 [Texas Instruments]

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TPS43335-Q1

TPS43336-Q1

SLVSAV6B – JUNE 2011 – REVISED JULY 2012

www.ti.com

DC ELECTRICAL CHARACTERISTICS (continued)

VIN = 8 V to 18 V, TJ = –40°C to 150°C (unless otherwise noted)

NO.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

4.0

Boost Controller

4.1

Vboost7-VIN

Boost VOUT = 7 V

DIV = low, VBAT = 2 V to 7 V

6.8

7

7.3

V

Boost-enable threshold

Boost VOUT = 7 V, VBAT falling

7.5

8

8.5

4.2

Vboost7-th

Boost-disable threshold

Boost VOUT = 7 V, VBAT falling

8

8.5

9

V

Boost hysteresis

Boost VOUT = 7 V, VBAT falling

0.4

0.5

0.6

4.3

Vboost10-VIN

Boost VOUT = 10 V

DIV = open, VBAT = 2 V to 10 V

9.7

10

10.4

V

Boost-enable threshold

Boost VOUT = 10 V, VBAT falling

10.5

11

11.5

4.4

Vboost10-th

Boost-disable threshold

Boost VOUT = 10 V, VBAT falling

11

11.5

12

V

Boost hysteresis

Boost VOUT = 10 V, VBAT falling

0.4

0.5

0.6

4.5

Vboost11-VIN

Boost VOUT = 11 V

DIV = VREG, VBAT = 2 V to 11 V

10.7

11

11.4

V

Boost-enable threshold

Boost VOUT = 11 V, VBAT falling

11.5

12

12.5

4.6

Vboost11-th

Boost-disable threshold

Boost VOUT = 11 V, VBAT falling

12

12.5

13

V

Boost hysteresis

Boost VOUT = 11 V, VBAT falling

0.4

0.5

0.6

Boost-Switch Current Limit

4.7

VDS

Current-limit sensing

DS input with respect to PGNDA

0.175

0.2

0.225

V

4.8

tDS

Leading-edge blanking

200

ns

Gate Driver for Boost Controller

4.9

IGC1 Peak

Gate-driver peak current

1.5

A

4.10

rDS(on)

Source and sink driver

VREG = 5.8 V, IGC1 current = 200 mA

2

Ω

Gate Driver for PMOS

4.11

rDS(on)

PMOS OFF

10

20

Ω

4.12

IPMOS_ON

Gate current

VIN = 13.5 V, Vgs = –5 V

10

mA

4.13

tdelay_ON

Turnon delay

C = 10 nF

5

10

µs

Boost-Controller Switching Frequency

4.14

fsw-Boost

Boost switching frequency

fSW_Buck / 2

kHz

4.15

DBoost

Boost duty cycle

90%

Error Amplifier (OTA) for Boost Converters

VBAT = 12 V

0.8

1.35

4.16

GmBOOST

Forward transconductance

mS

VBAT = 5 V

0.35

0.65

5.0

Buck Controllers

5.1

VBuckA/B

Adjustable output-voltage range

0.9

11

V

Measure FBX pin

0.792

0.800

0.808

V

Internal reference and tolerance

5.2

Vref, NRM

voltage in normal mode

–1%

1%

Measure FBX pin

0.784

0.800

0.816

V

Internal reference and tolerance

5.3

Vref, LPM

voltage in low-power mode

–2%

2%

V sense for forward-current limit in

5.4

FBx = 0.75 V (low duty cycle)

60

75

90

mV

CCM

Vsense

V sense for reverse-current limit in

5.5

FBx = 1 V

–65

–7.5

–23

mV

CCM

5.6

VI-Foldback

V sense for output short

FBx = 0 V

17

32.5

48

mV

5.7

tdead

Shoot-through delay, blanking time

20

ns

High-side minimum on-time

100

ns

5.8

DCNRM

Maximum duty cycle (digitally

98.75%

controlled)

5.9

DCLPM

Duty cycle, LPM

80%

LPM entry-threshold load current

ILPM_Entry

as fraction of maximum set load

1%

.(3)

current

5.10

LPM exit-threshold load current as

ILPM_Exit

fraction of maximum set load

(3)

10%

current

(3)

The exit threshold is specified to be always higher than the entry threshold.

6

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