LTC3221-5 查看數據表（PDF） - Linear Technology

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LTC3221-5

Micropower

Linear Technology 

LTC3221/

LTC3221-3.3/LTC3221-5

ELECTRICAL CHARACTERISTICS 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.

SYMBOL

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

LTC3221-3.3/LTC3221-5

I⎯S⎯H⎯D⎯N

Shutdown Supply Current

VIH

⎯S⎯H⎯D⎯N Input Threshold (High)

VIL

⎯S⎯H⎯D⎯N Input Threshold (Low)

IIH

⎯S⎯H⎯D⎯N Input Current (High)

IIL

⎯S⎯H⎯D⎯N Input Current (Low)

LTC3221/LTC3221-3.3/LTC3221-5

VOUT = 0V, ⎯S⎯H⎯D⎯N = 0V

⎯S⎯H⎯D⎯N = VIN

⎯S⎯H⎯D⎯N = 0V

●

● 1.3

●

● –1

● –1

1

µA

V

0.4

V

1

µA

1

µA

fOSC

VUVLO

Switching Frequency

UVLO Threshold

VOUT = 2.5V

600

kHz

1

V

Note 1: Absolute Maximum Ratings are those values beyond which the life operating temperature range are assured by design, characterization and

of a device may be impaired.

correlation with statisitical process controls.

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

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

Note 4: ROL = (2VIN – VOUT)/IOUT.

TYPICAL PERFOR A CE CHARACTERISTICS

Oscillator Frequency vs

Supply Voltage

800

750

700

650

600

550

500

450

400

1.5

2.0 2.5 3.0 3.5 4.0 4.5

SUPPLY VOLTAGE (V)

3221 G01

⎯S⎯H⎯D⎯N LO-to-HI Threshold vs

Temperature

0.9

0.8

VIN = 3.2V

0.7

VIN = 2.5V

0.6

VIN = 1.8V

0.5

Oscillator Frequency vs

Temperature

800

750

700

650 VIN = 4.5V

600

VIN = 2.5V

550

VIN = 1.8V

500

450

400

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

3221 G02

⎯S⎯H⎯D⎯N HI-to-LO Threshold vs

Temperature

0.9

VIN = 3.2V

0.8

0.7 VIN = 2.5V

0.6 VIN = 1.8V

0.5

⎯S⎯H⎯D⎯N Threshold Voltage vs

Supply Voltage

0.9

0.8 LOW-TO-HIGH THRESHOLD

0.7

HIGH-TO-LOW THRESHOLD

0.6

0.5

0.4

1.5

2.0 2.5 3.0 3.5 4.0 4.5

SUPPLY VOLTAGE (V)

3221 G03

Short-Circuit Current vs

Supply Voltage

150

TA = –45°C

130

110

TA = 90°C

TA = 25°C

90

70

0.4

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

3221 G04

0.4

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

3221 G05

50

1.5

2.0 2.5 3.0 3.5 4.0 4.5

SUPPLY VOLTAGE (V)

3221 G06

3221f

3

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