TPS62590-Q1_15 datasheet(5/28 Pages) TI

Part #	TPS62590-Q1

Description	TPS62590-Q1 Automotive 2.25-MHz 1-A Step-Down Converter In 2-mm 횞 2-mm SON Package

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Manufacturer	TI [Texas Instruments]

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TPS62590-Q1

www.ti.com

SLVSAO5B – DECEMBER 2010 – REVISED OCTOBER 2015

6.5 Electrical Characteristics

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

for condition VIN = EN = 3.6 V. External components CIN = 10 μF 0603, COUT = 10 μF 0603, L = 2.2 μH; see Parameter

Measurement Information.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY

VI

Input voltage range

2.5

6

V

VIN 2.7 V to 6 V

1000

IO

Output current(1)

mA

VIN 2.5 V to 2.7 V

600

IO = 0 mA, PFM mode enabled

(MODE = GND) device not switching,

15

μA

See (2)

IQ

Operating quiescent current

IO = 0 mA, switching with no load

(MODE = VIN) PWM mode,

3.8

mA

VO = 1.8 V, VIN = 3 V

ISD

Shutdown current

EN = GND

0.5

μA

Falling

1.85

UVLO

Undervoltage lockout threshold

V

Rising

1.95

ENABLE, MODE

High-level input voltage, EN,

VIH

2.5 V

≤ VIN ≤ 6 V

1

VIN

V

MODE

Low-level input voltage, EN,

VIL

2.5 V

≤ VIN ≤ 6 V

0

0.4

V

MODE

II

Input bias current, EN, MODE

EN, MODE = GND or VIN

0.01

1

μA

POWER SWITCH

High-side MOSFET on-resistance

250

rDS(on)

VIN = VGS = 3.6 V, TA = 25°C

m

Ω

Low-side MOSFET on-resistance

190

Forward current limit MOSFET

ILIMF

VIN = VGS = 3.6 V, TA = 25°C

1.19

1.4

1.78

A

high-side and low-side

Thermal shutdown

Increasing junction temperature

140

TSD

°C

Thermal shutdown hysteresis

Decreasing junction temperature

20

OSCILLATOR

fSW

Oscillator frequency

2.5 V

≤ VIN ≤ 6 V

2.25

MHz

OUTPUT

VO

Adjustable output voltage range

0.75

VI

V

Vref

Reference voltage

600

mV

MODE = VIN, PWM mode,

VFB(PWM)

Feedback voltage

–2.5%

0%

2.5%

2.5 V

≤ VIN ≤ 6 V, See

(3)

MODE = GND, device in PFM mode,

VFB(PFM)

Feedback voltage, PFM mode

1%

1% voltage positioning active, See (2)

Load regulation

–1

%/A

Time from active EN to reach 95% of

500

tStart Up

Start-up time

μs

VO

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

1

μA

See (4)

(1)

Not production tested.

(2)

In PFM mode, the internal reference voltage is set to typ. 1.01 × Vref . See Parameter Measurement Information.

(3)

For VIN = VO + 1 V

(4)

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

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