TPS62021DRC datasheet(3/18 Pages) TI

No de pièce	TPS62021DRC

Description	600 mA/1.25 MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER

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Fabricant	TI [Texas Instruments]

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ELECTRICAL CHARACTERISTICS

PIN ASSIGNMENTS

1

2

3

4

5

10

9

8

7

6

EN

VIN

GND

FB

PGND

SW

MODE

DGQ PACKAGE

(TOP VIEW)

NOTE: The PowerPAD must be connected to GND.

1

2

3

4

5

10

9

8

7

6

EN

VIN

GND

FB

PGND

SW

MODE

DRC PACKAGE

(TOP VIEW)

TPS62020, TPS62021

SLVS076B – JUNE 2003 – REVISED APRIL 2004

V

I = 3.6 V, VO = 1.8 V, IO = 600 mA, EN = VIN, TA = -40°C to 85°C, typical values are at TA = 25°C (unless otherwise noted)

(1)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY CURRENT

VI

Input voltage range

2.5

6.0

V

I(Q)

Operating quiescent current

IO = 0 mA, device is not switching

18

35

µA

ISD

Shutdown supply current

EN = GND

0.1

1

µA

VUVLO

Under-voltage lockout threshold

1.5

2.3

V

ENABLE AND MODE

VEN

EN high level input voltage

1.4

V

VEN

EN low level input voltage

0.4

V

IEN

EN input bias current

EN = GND or VIN

0.01

1.0

µA

V(MODE)

MODE high level input voltage

1.4

V

V(MODE)

MODE low level input voltage

0.4

V

I(MODE)

MODE input bias current

MODE = GND or VIN

0.01

1.0

µA

POWER SWITCH

P-channel MOSFET on-resistance

VI = VGS = 3.6 V

115

210

m

Ω

rDS(ON)

P-channel MOSFET on-resistance

VI = VGS = 2.5 V

145

270

m

Ω

Ilkg(P)

P-channel leakage current

VDS = 6.0 V

1

µA

N-channel MOSFET on-resistance

VI = VGS = 3.6 V

85

200

m

Ω

rDS(ON)

N-channel MOSFET on-resistance

VI = VGS = 2.5 V

115

280

m

Ω

IIkg(N)

N-channel leakage current

VDS = 6.0 V

1

µA

IL

P-channel current limit

2.5 V < VI < 6.0 V

0.9

1.1

1.3

A

Thermal shutdown

150

°C

OSCILLATOR

VFB= 0.5 V

1

1.25

1.5

MHz

fS

Oscillator frequency

VFB = 0 V

625

kHz

OUTPUT

VO

Adjustable output voltage range

0.7

VIN

V

Vref

Reference voltage

0.5

V

VI = 2.5 V to 6.0 V; IO = 0 mA

0%

3%

V

VFB

Feedback voltage

VI = 2.5 V to 6.0 V; 0 mA ≤ IO ≤ 600 mA

-3%

3%

V

Line regulation(1)

VI = VO + 0.5 V (min 2.5 V) to 6.0 V, IO = 10 mA

0

%/V

Load regulation(1)

IO = 10 mA to 1200 mA

0

%/mA

Leakage current into SW pin

VI > VO, 0 V≤ VSW ≤ VI

0.1

1

µA

IIkg(SW)

Reverse leakage current into pin SW

VI = open; EN = GND; VSW = 6.0 V

0.1

1

µA

f

Short circuit switching frequency

VFB = 0 V

625

kHz

(1)

The line and load regulations are digitally controlled to assure an output voltage accuracy of

±3%.

3

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