TPS62290IDRVRQ1 datasheet(3/25 Pages) TI1

Part #	TPS62290IDRVRQ1

Description	1-A Step Down Converter in 2 x 2 SON Package

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Manufacturer	TI1 [Texas Instruments]

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TPS62290-Q1, TPS62291-Q1, TPS62293-Q1

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SLVSAI5 – SEPTEMBER 2010

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 = 4.7mF 0603, COUT = 10mF 0603, L = 2.2mH, refer to parameter

measurement information.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY

VI

Input voltage range

2.3

6

V

VIN 2.7 V to 6 V

1000

IO

Output current(1)

VIN 2.5 V to 2.7 V

600

mA

VIN 2.3 V to 2.5 V

300

IO = 0 mA, PFM mode enabled

15

mA

(MODE = GND) device not switching, See (2)

IQ

Operating quiescent current

IO = 0 mA, switching with no load, (MODE = VIN)

3.8

mA

PWM operation, VO = 1.8 V, VIN = 3V

EN = GND

TA = 25°C

0.1

1

ISD

Shutdown current

mA

TA = 105°C

2.5

Falling

1.85

UVLO

Undervoltage lockout threshold

V

Rising

1.95

ENABLE, MODE

VIH

High level input voltage, EN, MODE

2.3 V

≤ VIN ≤ 6 V

1

VIN

V

VIL

Low level input voltage, EN, MODE

2.3 V

≤ VIN ≤ 6 V

0

0.4

V

II

Input bias current, EN, MODE

EN, MODE = GND or VIN

0.01

1

mA

POWER SWITCH

High side MOSFET on-resistance

240

480

RDS(on)

VIN = VGS = 3.6 V, TA = 25°C

m

Ω

Low side MOSFET on-resistance

185

380

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

2.3 V

≤ VIN ≤ 6 V

2.0

2.25

2.5

MHz

OUTPUT

VO

Adjustable output voltage range

0.6

VI

V

Vref

Reference voltage

600

mV

MODE = VIN, PWM operation,

VFB(PWM)

Feedback voltage

–1.5

0

1.5

2.3 V

≤ VIN ≤ 6 V, See

(3)

%

MODE = GND, device in PFM mode, +1%

VFB(PFM)

Feedback voltage PFM mode

1

voltage positioning active, See (2)

Load regulation

- 0.5

%/A

tStart Up

Start-up time

Time from active EN to reach 95% of VO

500

ms

tRamp

VO ramp-up time

Time to ramp from 5% to 95% of VO

250

ms

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

Ilkg

Leakage current into SW pin

0.1

1

mA

See (4)

(1)

Not Production Tested.

(2)

In PFM mode, the internal reference voltage is set to typ. 1.01 × Vref . See the parameter measurement information.

(3)

For VIN = VO + 1.0 V

(4)

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

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Product Folder Link(s): TPS62290-Q1 TPS62291-Q1 TPS62293-Q1

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