LTC3221 datasheet(3/12 Pages) LINER

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LTC3221/

LTC3221-3.3/LTC3221-5

3221f

110

130

150

SUPPLY VOLTAGE (V)

1.5

2.0

2.5

3.0

3.5

4.0

4.5

3221 G06

TA = –45°C

TA = 90°C

TA = 25°C

TEMPERATURE (

°C)

–50

–25

100

125

3221 G05

VIN = 3.2V

0.7

0.8

0.6

0.4

0.5

0.9

VIN = 2.5V

VIN = 1.8V

TEMPERATURE (

°C)

–50

–25

100

125

3221 G04

VIN = 3.2V

VIN = 2.5V

VIN = 1.8V

0.7

0.8

0.6

0.4

0.5

0.9

0.7

0.8

0.6

0.4

0.5

0.9

HIGH-TO-LOW THRESHOLD

LOW-TO-HIGH THRESHOLD

SUPPLY VOLTAGE (V)

1.5

2.0

2.5

3.0

3.5

4.0

4.5

3221 G03

The ● denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = 2.5V (LTC3221-3.3/LTC3221) or 3V (LTC3221-5), ⎯S⎯H⎯D⎯N = VIN,

CFLY = 1µF, CIN = 2.2µF, COUT = 2.2µF, unless otherwise speciﬁed.

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: The LTC3221EDC-X is guaranteed to meet performance

speciﬁcations from 0°C to 70°C. Speciﬁcaiton over the – 40°C to 85°C

operating temperature range are assured by design, characterization and

correlation with statisitical process controls.

Note 3: Guaranteed by design, not subject to test.

Note 4: ROL = (2VIN – VOUT)/IOUT.

ELECTRICAL CHARACTERISTICS

Oscillator Frequency vs

Supply Voltage

Oscillator Frequency vs

Temperature

⎯S⎯H⎯D⎯N Threshold Voltage vs

Supply Voltage

⎯S⎯H⎯D⎯N LO-to-HI Threshold vs

Temperature

⎯S⎯H⎯D⎯N HI-to-LO Threshold vs

Temperature

Short-Circuit Current vs

Supply Voltage

TYPICAL PERFOR A CE CHARACTERISTICS

SUPPLY VOLTAGE (V)

1.5

800

750

700

500

450

600

550

650

400

2.0

2.5

3.0

3.5

4.0

4.5

3221 G01

800

750

700

500

450

600

550

650

400

TEMPERATURE (

°C)

–50

–25

100

125

3221 G02

VIN = 4.5V

VIN = 2.5V

VIN = 1.8V

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

LTC3221-3.3/LTC3221-5

I⎯S⎯H⎯D⎯N

Shutdown Supply Current

VOUT = 0V, ⎯S⎯H⎯D⎯N = 0V

●

1µA

VIH

⎯S⎯H⎯D⎯N Input Threshold (High)

●

1.3

VIL

⎯S⎯H⎯D⎯N Input Threshold (Low)

●

0.4

IIH

⎯S⎯H⎯D⎯N Input Current (High)

⎯S⎯H⎯D⎯N = VIN

●

–1

µA

IIL

⎯S⎯H⎯D⎯N Input Current (Low)

⎯S⎯H⎯D⎯N = 0V

●

–1

µA

LTC3221/LTC3221-3.3/LTC3221-5

fOSC

Switching Frequency

VOUT = 2.5V

600

kHz

VUVLO

UVLO Threshold

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