TPS65266_15 datasheet(6/41 Pages) TI

Part #	TPS65266

Description	TPS65266 2.7- to 6.5-V Input Voltage, 3-A/2-A/2-A Output Current Triple Synchronous Step-Down Converter

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TPS65266

SLVSCT9B – NOVEMBER 2014 – REVISED JANUARY 2015

www.ti.com

6.5 Electrical Characteristics

TA = 25°C, VIN = 5 V, FSW = 1 MHz (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INPUT SUPPLY VOLTAGE

VIN

Input voltage range

2.7

6.5

V

VIN rising

2.35

2.45

2.6

V

UVLO

VIN undervoltage lockout

VIN falling

2.15

2.25

2.35

V

Hysteresis

200

mV

IDDSDN

Shutdown supply current

EN1 = EN2 = EN3 = 0 V

9

µA

EN1 = EN2 = EN3 = 5 V,

IDDQ_NSW

790

µA

FB1 = FB2 = FB3 = 0.8 V

EN1 = 5 V, EN2 = EN3 = 0 V,

IDDQ_NSW1

340

µA

FB1 = 0.8 V

Input quiescent current without

buck1/2/3 switching

EN2 = 5 V, EN1 = EN3 = 0 V,

IDDQ_NSW2

340

µA

FB2 = 0.8 V

EN3 = 5 V, EN1 = EN2 = 0 V,

IDDQ_NSW3

340

µA

FB3 = 0.8 V

BUCK1, BUCK2, BUCK3

VFB

Feedback voltage

VCOMP = 1.2 V

0.594

0.6

0.606

V

VENXH

EN1/2/3 high-level input voltage

1.2

1.26

V

VENXL

EN1/2/3 low-level input voltage

1.1

1.15

V

IENX1

EN1/2/3 pullup current

ENx = 1 V

1.8

2.1

2.4

µA

IENX2

EN1/2/3 pullup current

ENx = 1.3 V

5.3

µA

IENhys

Hysteresis current

3.2

µA

ISSX

Soft-start charging current

4.5

5.5

6.5

µA

tON_MIN

Minimum on-time

80

100

ns

Gm_EA

Error amplifier transconductance

–2 µA < ICOMPX < 2 µA

290

µS

COMP1/2/3 voltage to inductor current

Gm_PS1/2/3

ILX = 0.5 A

10

A/V

Gm

(1)

ILIMIT1

Buck1 peak inductor current limit

3.9

4.6

5.3

A

ILIMITSINK1

Buck1 low-side sink current limit

1.4

ILIMIT2/3

Buck2/3 peak inductor current limit

2.5

3.1

3.7

A

ILIMITSINK2/3

Buck2/3 low-side sink current limit

1.2

A

Rdson_HS1

Buck1 high-side switch resistance

VINQ = 5 V

45

m

Ω

Rdson_LS1

Buck1 low-side switch resistance

VINQ = 5 V

50

m

Ω

Rdson_HS2

Buck2 high-side switch resistance

VINQ = 5 V

60

m

Ω

Rdson_LS2

Buck2 low-side switch resistance

VINQ = 5 V

60

m

Ω

Rdson_HS3

Buck3 high-side switch resistance

VINQ = 5 V

60

m

Ω

Rdson_LS3

Buck3 low-side switch resistance

VINQ = 5 V

60

m

Ω

HICCUP TIMING

tHiccup_wait

Overcurrent wait time(1)

512

cycles

tHiccup_re

Hiccup time before restart(1)

16382

cycles

POWER GOOD

FBx undervoltage falling

92.5

%VREF

Vth_PG

Feedback voltage threshold

FBx undervoltage rising

95

%VREF

tDEGLITCH(PG)_F

PGOOD falling edge deglitch time

128

cycles

tRDEGLITCH(PG)_R

PGOOD rising edge deglitch time

16350

cycles

IPG

PGOOD pin leakage

1

µA

VLOW_PG

PGOOD pin low voltage

ISINK = 1 mA

0.4

V

(1)

Lab validation result

6

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