ADP1108_15 datasheet(2/12 Pages) AD

Il numero della parte	ADP1108

Spiegazioni elettronici	Micropower, DC-DC Converter Adjustable and Fixed 3.3 V, 5 V, 12 V

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Produttore elettronici	AD [Analog Devices]

Homepage	http://www.analog.com

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2 / 12 page

REV. 0

–2–

ADP1108–SPECIFICATIONS

Parameter

Symbol

Conditions

Min

Typ

Max

Units

QUIESCENT CURRENT

IQ

Switch Off

90

150

µA

QUIESCENT CURRENT,

IQ

No Load, TA = +25

°C

BOOST MODE CONFIGURATION

ADP1108-3.3

90

µA

ADP1108-5

90

µA

ADP1108-12

90

µA

INPUT VOLTAGE

VIN

Step-Up Mode

2.0

12.6

V

Step-Down Mode

30

V

COMPARATOR TRIP POINT VOLTAGE

ADP1108

1

1.20

1.245

1.30

V

OUTPUT SENSE VOLTAGE

VOUT

ADP1108-3.3

2

3.13

3.3

3.46

V

ADP1108-5

2

4.75

5.00

5.25

V

ADP1108-12

2

11.4

12.0

12.6

V

COMPARATOR HYSTERESIS

ADP1108

5

12

mV

OUTPUT HYSTERESIS

ADP1108-3.3

13

30

mV

ADP1108-5

20

55

mV

ADP1108-12

50

100

mV

OSCILLATOR FREQUENCY

14

19

25

kHz

DUTY CYCLE

Full Load

55

70

78

%

SWITCH ON TIME

tON

ILIM Tied to VIN

25

36

48

µs

FEEDBACK PIN BIAS CURRENT

VFB = 0 V

25

200

nA

SET PIN BIAS CURRENT

VSET = VREF

60

130

nA

GAIN BLOCK OUTPUT LOW

VOL

ISINK = 100

µA, V

SET = 1.00 V

0.15

0.4

V

REFERENCE LINE REGULATION

2.0 V

≤ V

IN

≤ 5 V

0.2

0.4

%/V

5 V

≤ V

IN ≤ 30 V

0.02

0.075

%/V

SWSAT VOLTAGE, STEP-UP MODE

VSAT

VIN = 3.0 V, ISW = 650 mA

0.5

0.75

V

VIN = 5.0 V, ISW = 1 A,

0.8

1.00

V

TA = +25

°CV

SWSAT VOLTAGE, SAT

VIN = 12 V, ISW = 650 mA,

TA = +25

°C

1.1

1.5

V

STEP-DOWN MODE

1.7

V

GAIN BLOCK GAIN

AV

RL = 100K

3

400

1000

V/V

CURRENT LIMIT

220

Ω from I

LIM to VIN,

TA = +25

°C

500

mA

CURRENT LIMIT TEMPERATURE

COEFFICIENT

–0.3

%/

°C

SWITCH OFF LEAKAGE CURRENT

Measured at SW1 Pin,

TA = +25

°C1

10

µA

MAXIMUM EXCURSION BELOW GND

VSW2

1SW1

≤ 10 µA, Switch Off

TA = +25

°C

–400

–350

mV

NOTES

1This specification guarantees that both the high and low trip points of the comparator fall within the 1.20 V to 1.30 V range.

2The output voltage waveform will exhibit a sawtooth shape due to the comparator hysteresis. The output voltage on the fixed output versions will always be within the

specified range.

3100 k

Ω resistor connected between a 5 V source and the AO pin.

All limits at temperature extremes are guaranteed via correlation using standard Quality Control methods.

Specifications subject to change without notice.

(0 C to +70 C, VIN = 3.0 V unless otherwise noted)

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