TPS62224DDCTG4 datasheet(3/24 Pages) TI

Part #	TPS62224DDCTG4

Description	400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23

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Manufacturer	TI [Texas Instruments]

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ELECTRICAL CHARACTERISTICS

TPS62220, TPS62221, TPS62222

TPS62223, TPS62224, TPS62227

TPS62228, TPS62229

SLVS491D – SEPTEMBER 2003 – REVISED MARCH 2006

V

I = 3.6 V, VO = 1.8 V, IO = 200 mA, EN = VIN, TA = -40°C to 85°C, typical values are at TA = 25°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY CURRENT

VI

Input voltage range

2.5

6

V

IQ

Operating quiescent current

IO = 0 mA, Device is not switching

15

25

µA

Shutdown supply current

EN = GND

0.1

1

µA

Undervoltage lockout threshold

1.5

2

V

ENABLE

EN high level input voltage

1.3

V

V(EN)

EN low level input voltage

0.4

V

I(EN)

EN input bias current

EN = GND or VIN

0.01

0.1

µA

POWER SWITCH

VI = VGS = 3.6 V

530

670

P-channel MOSFET on-resistance

m

Ω

VI = VGS = 2.5 V

670

850

rDS(on)

VI = VGS = 3.6 V

430

540

N-channel MOSFET on-resistance

m

Ω

VI = VGS = 2.5 V

530

660

P-channel leakage current

VDS = 6 V

0.1

1

µA

Ilkg

N-channel leakage current

VDS = 6 V

0.1

1

µA

I(LIM)

P-channel current limit

2.5 V < VI < 6 V

600

670

880

mA

OSCILLATOR

fS

Switching frequency

0.8

1.25

1.85

MHz

OUTPUT

IO

Output current

400

mA

Adjustable output voltage

VO

TPS62220

0.7

VIN

V

range

Vref

Reference voltage

0.5

V

VI = 3.6 V to 6 V, IO = 0 mA

0%

3%

TPS62220

Feedback voltage, See (1)

Adjustable

VI = 3.6 V to 6 V, 0 mA ≤ IO ≤ 400 mA

-3%

3%

VI = 2.5 V to 6 V, IO = 0 mA

0%

3%

TPS62221

1.5 V

VI = 2.5 V to 6 V, 0 mA≤ IO ≤ 400 mA

-3%

3%

VI = 2.5 V to 6 V, IO = 0 mA

0%

3%

TPS62224

1.6 V

VI = 2.5 V to 6 V, 0 mA ≤ IO ≤ 400 mA

-3%

3%

VI = 2.5 V to 6 V, IO = 0 mA

0%

3%

TPS62229

1.7 V

VI = 2.5 V to 6 V, 0 mA ≤ IO ≤ 400 mA

-3%

3%

VI = 2.5 V to 6 V, IO = 0 mA

0%

3%

TPS62222

VO

Fixed output voltage

1.8 V

VI = 2.5 V to 6 V, 0 mA ≤ IO ≤ 400 mA

-3%

3%

VI = 2.5 V to 6 V, IO = 0 mA

0%

3%

TPS62228

1.875 V

VI = 2.5 V to 6 V, 0 mA ≤ IO ≤ 400 mA

-3%

3%

VI = 2.7 V to 6 V, IO = 0 mA

0%

3%

TPS62223

2.3 V

VI = 2.7 V to 6 V, 0 mA ≤ IO ≤ 400 mA

-3%

3%

VI = 2.7 V to 6 V, IO = 0 mA

0%

3%

TPS62227

1.2 V

VI = 2.7 V to 6 V, 0 mA ≤ IO ≤ 400 mA

-3%

3%

Line regulation

VI = 2.5 V to 6 V, IO = 10 mA

0.26

%/V

Load regulation

IO = 100 mA to 400 mA

0.0014

%/mA

Leakage current into SW pin

VI > VO, 0 V ≤ V(SW) ≤ VI

0.1

1

µA

Ilkg

Reverse leakage current into pin SW

VI = open, EN = GND, V(SW) = 6 V

0.1

1

µA

(1)

For output voltages

≤ 1.2 V, a 22-µF output capacitor value is required to achieve a maximum output voltage accuracy of 3% while

operating in power-save mode (PFM mode). For output voltages

≥ 2 V, an inductor of 10 µH and an output capacitor of ≥ 10 µF is

recommended. See the Application Information section for external components.

3

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