TPS62290DRVR datasheet(3/23 Pages) TI

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ELECTRICAL CHARACTERISTICS

TPS62290

SLVS764 – JUNE 2007

Over full operating ambient temperature range, typical values are at T

A = 25°C. Unless otherwise noted, specifications apply

for condition V

IN = EN = 3.6V. External components CIN = 4.7µF 0603, COUT = 10µF 0603, L = 2.2µH, refer to parameter

measurement information.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY

Input voltage range

2.3

VIN 2.7 V to 6 V

1000

Output current

VIN 2.5 V to 2.7 V

600

VIN 2.3 V to 2.5 V

300

IO = 0 mA, PFM mode enabled

(MODE = GND) device not switching,

µA

See (1)

Operating quiescent current

IO = 0 mA, switching with no load

(MODE = VIN) PWM operation,

3.8

VO = 1.8 V, VIN = 3V

ISD

Shutdown current

EN = GND

0.1

µA

Falling

1.85

UVLO

Undervoltage lockout threshold

Rising

1.95

ENABLE, MODE

High level input voltage, EN,

2.3 V

≤ V

IN ≤ 6 V

VIN

VIH

MODE

Low level input voltage, EN,

2.3 V

≤ V

IN ≤ 6 V

0.4

VIL

MODE

Input bias current, EN, MODE

EN, MODE = GND or VIN

0.01

µA

POWER SWITCH

High side MOSFET on-resistance

240

480

RDS(on)

VIN = VGS = 3.6 V, TA = 25°C

Ω

Low side MOSFET on-resistance

185

380

Forward current limit MOSFET

ILIMF

VIN = VGS = 3.6 V

1.19

1.4

1.68

high-side and low side

Thermal shutdown

Increasing junction temperature

140

TSD

°C

Thermal shutdown hysteresis

Decreasing junction temperature

OSCILLATOR

fSW

Oscillator frequency

2.3 V

≤ V

IN ≤ 6 V

2.0

2.25

2.5

MHz

OUTPUT

Adjustable output voltage range

0.6

Vref

Reference voltage

600

MODE = VIN, PWM operation,

VFB(PWM)

Feedback voltage

–1.5%

1.5%

2.3 V

≤ V

IN ≤ 6 V, See

(2)

MODE = GND, device in PFM mode,

VFB(PFM)

Feedback voltage PFM mode

+1% voltage positioning active, See (1)

Load regulation

- 0.5

%/A

Time from active EN to reach 95% of

500

tStart Up

Start-up time

µs

tRamp

VO ramp-up time

Time to ramp from 5% to 95% of VO

250

µs

VI = 3.6 V, VI = VO = VSW, EN = GND,

Ilkg

Leakage current into SW pin

0.1

µA

See (3)

(1)

In PFM mode, the internal reference voltage is set to typ. 1.01

× V

ref . See the parameter measurement information.

(2)

For VIN = VO + 1.0 V

(3)

In fixed output voltage versions, the internal resistor divider network is disconnected from FB pin.

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