TPS65261 datasheet(6/36 Pages) TI1

Part #	TPS65261

Description	2.7 to 6-V Input Voltage, 3-A/2-A/2-A Output Current Triple Synchronous Step-Down Converter

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Manufacturer	TI1 [Texas Instruments]

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6 / 36 page

6

TPS65266-1

SLVSDA6 – OCTOBER 2016

www.ti.com

Product Folder Links: TPS65266-1

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(1)

Lab validation result

(2)

Typical value without bonding wires; from design simulation

6.5 Electrical Characteristics

TJ = –30°C to 125°C, VIN= 5 V, typical values are at TJ = 25°C, (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INPUT SUPPLY VOLTAGE

VIN

Input voltage range

2.7

6

V

UVLO

VIN undervoltage lockout

VIN rising

2.35

2.45

2.6

V

VIN falling

2.15

2.25

2.37

V

IDD(SDN)

Shutdown supply current

EN1 = EN2 = EN3 = 0 V

9

µA

IDD(Q_NSW)

Input quiescent current without

buck1/2/3 switching

EN1 = EN2 = EN3 = 5 V,

FB1 = FB2 = FB3 = 0.8 V

790

µA

IDD(Q_NSW1)

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

FB1 = 0.8 V

340

µA

IDD(Q_NSW2)

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

FB2 = 0.8 V

340

µA

IDD(Q_NSW3)

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

FB3 = 0.8 V

340

µA

BUCK1, BUCK2, BUCK3

VFB

Feedback voltage

VCOMP = 1.2 V

0.594

0.6

0.606

V

VEN(XH)

EN1/2/3 high-level input voltage

1.2

1.26

V

VEN(XL)

EN1/2/3 low-level input voltage

1.1

1.15

V

IEN(X1)

EN1/2/3 pullup current

ENx = 1 V

1.7

2.1

2.5

µA

IEN(X2)

EN1/2/3 pullup current

ENx = 1.3 V

5.3

µA

IEN(hys)

Hysteresis current

3.2

µA

ISSX

Soft-start charging current

4.5

5.5

6.5

µA

G(m_PS1/2/3)

COMP1/2/3 voltage to inductor current

Gm

(1)

ILX = 0.5 A

10

A/V

I(LIMIT1)

Buck1 peak inductor current limit

3.55

4.6

5.6

A

I(LIMITSINK1)

Buck1 low-side sink current limit

1.4

I(LIMIT2/3)

Buck2/3 peak inductor current limit

2.35

3.1

3.7

A

I(LIMITSINK2/3)

Buck2/3 low-side sink current limit

1.2

A

Rds(on)_HS1

Buck1 high-side switch resistance(2)

VINQ = 5 V

45

m

Ω

Rds(on)_LS1

Buck1 low-side switch resistance(2)

VINQ = 5 V

50

m

Ω

Rds(on)_HS2

Buck2 high-side switch resistance(2)

VINQ = 5 V

60

m

Ω

Rds(on)_LS2

Buck2 low-side switch resistance(2)

VINQ = 5 V

60

m

Ω

Rds(on)_HS3

Buck3 high-side switch resistance(2)

VINQ = 5 V

60

m

Ω

Rds(on)_LS3

Buck3 low-side switch resistance(2)

VINQ = 5 V

60

m

Ω

POWER GOOD

V(th_PG)

Feedback voltage threshold

FBx undervoltage falling

92.5

%VREF

FBx undervoltage rising

95

%VREF

IPG

PGOOD pin leakage

1

µA

V(LOW_PG)

PGOOD pin low voltage

I(SINK) = 1 mA

0.4

V

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