TPS62590DRVT datasheet(3/24 Pages) TI1

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TPS62590

www.ti.com

SLVS897B

– JANUARY 2009 – REVISED APRIL 2011

ELECTRICAL CHARACTERISTICS

Over full operating ambient temperature range, typical values are at TA = 25°C. Unless otherwise noted, specifications apply

for condition VIN = EN = 3.6V. External components CIN = 10μF 0603, COUT = 10μF 0603, L = 2.2μH, refer to parameter

measurement information.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY

Input voltage range

2.5

5.5

VIN 2.7 V to 5.5 V

1000

Output current

VIN 2.5 V to 2.7 V

600

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 = 3 V

ISD

Shutdown current

EN = GND

0.5

μA

Falling

1.85

UVLO

Undervoltage lockout threshold

Rising

1.95

ENABLE, MODE

High level input voltage, EN,

2.5 V

≤ VIN ≤ 5.5 V

VIN

VIH

MODE

Low level input voltage, EN,

2.5 V

≤ VIN ≤ 5.5 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

250

RDS(on)

VIN = VGS = 3.6 V, TA = 25°C

Ω

Low-side MOSFET on-resistance

190

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

2.5 V

≤ VIN ≤ 5.5 V

2.25

MHz

OUTPUT

Adjustable output voltage range

0.75

Vref

Reference voltage

600

MODE = VIN, PWM operation,

VFB(PWM)

Feedback voltage

–2.5%

2.5%

2.5 V

≤ VIN ≤ 5.5 V, See

(2)

MODE = GND, device in PFM mode,

VFB(PFM)

Feedback voltage PFM mode

+1% voltage positioning active, See (1)

Load regulation

–1

%/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

× Vref . See the parameter measurement information.

(2)

For VIN = VO + 1 V

(3)

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

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