APW7008_12 datasheet(3/22 Pages) ANPEC

3 / 22 page

Rev. A.4 - Jun., 2009

APW7008

www.anpec.com.tw

Recommended Operating Conditions

Symbol

Parameter

Rating

Unit

VIN

Input Voltage

2.8 to 4.5

VOUT

Output Voltage

3 to 4

ILED

LED Current

5 to 30

Output Current, VIN>3.5V, VF=3.1V, 1x Mode

180

Output Current, 3.5V<VIN>3.1V, VF=3.1V, 1.5x Mode

120

IOUT

Output Current, 3.1V<VIN>2.8V, VF=3.1V, 2x Mode

Ambient Temperature

-40 to 85

°C

Electrical Characteristics

APW7008

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VIN

Input Voltage

2.7

5.5

VUVLO

Under-Voltage Lockout Threshold

VIN falling

2.2

2.4

2.6

Under-Voltage Lockout Hysteresis

in 1.5x/2x mode

No switching in 1x mode

0.5

Quiescent Current

EN=0

0.1

µA

ILED-ERR

LED Current Accuracy

5mA<ILED<30mA

(Note 3)

±2

±8

Current Matching

5mA<ILED<30mA

(Note 4)

±1.5

±5

IISET

ISET Current

1000

µA

ISET to LED Current Ratio

IILED / (1.2V / REST) 5mA<ILED<30mA, TA

= +25

°C

370

400

420

VILED-TH

ILED Threshold Voltage

VILED falling

100

1.5x mode to 1x mode Transition

Hysteresis

VIN rising, VIN-VOUT

300

2x mode to 1.5x mode Transition

Hysteresis

VIN rising, VOUT-VIN

300

FOSC

Switching Frequency

0.8

1.2

MHz

1x mode (VIN-VOUT) / IOUT

1.6

1.5x mode (1.5xVIN-VOUT) / IOUT

ROUT

Open Loop VOUT Resistance

2x mode (2xVIN-VOUT) / IOUT

Ω

ISHORT

Short Circuit Current-Limit

VOUT < 1V

VOVP

OVP Threshold

5.5

VIH

Logic Pins High Threshold

1.3

0.7

IN = 2.85 to 5.5V, CIN = COUT = C1 = C2 = 1µF (ESR = 0.03Ω), ILED = 20mA, TA = -40°C to +85°C, unless otherwise noted. Typical values

are at T

A = +25°C.

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