LTC3218EDDB 查看數據表（PDF） - Linear Technology

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LTC3218EDDB

400mA Single Wire Camera LED Charge Pump

Linear Technology 

LTC3218

ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C, VIN = 3.6V, CIN = CFLY = 2.2μF, CCPO = 4.7μF, ENF = HIGH, unless

otherwise noted.

PARAMETER

Charge Pump (CPO)

Charge Pump Output Clamp Voltage

1:1 Mode Output Impedance

CONDITIONS

MIN TYP MAX UNITS

5.3

V

1.3

Ω

1:2 Mode Output Impedance

7

Ω

CLK Frequency

1

MHz

CPO Short Circuit Detection

Threshold Voltage

ENT = HIGH

● 0.6

1.5

V

Test Current

ENF, ENT

ENT = ENF = LOW, VCPO = 0V

● 20

50

mA

High Level Input Voltage (VIH)

Low Level Input Voltage (VIL)

Input Current (IIH)

Input Current (IIL)

Flash Timeout

VEN = 3.6V

VEN = 0V

ENF = HIGH

● 1.4

V

●

0.4

V

●

14.4

30

μA

● –1

1

μA

2

s

ISETF, ISETT

VISET

IISET

ISET = 110μA

ENT = LOW, ENF = HIGH

● 1.18 1.21 1.24

V

●

181

μA

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: Based on long-term current density limitations. Assumes an

operating duty cycle of ≤ 10% under Absolute Maximum Conditions

for durations less than 10 seconds. Maximum current for continuous

operation is 150mA.

Note 3: The LTC3218E is guaranteed to meet performance specifications

from 0°C to 85°C. Specifications over the –40°C to 85°C ambient

operating temperature range are assured by design, characterization and

correlation with statistical process controls.

TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.

ILED Dropout Voltage

vs LED Current

0.009

0.008

0.007

0.006

0.005

0.004

0.003

0.002

0.001

0

0

100

200

300

400

LED CURRENT (mA)

3218 G01

ILED vs RSET

450

400

350

TORCH

FLASH (ENT = LOW,

ENF = HIGH)

FLASH (ENT = ENF = HIGH)

300

250

200

150

100

50

0

0 50 100 150 200 250 300 350

RSET (kΩ)

3218 G02

VIN Shutdown Current vs VIN

3.0

T = 25°C

2.5

2.0

T = –40°C

1.5

T = 85°C

1.0

0.5

0

2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5

VIN (V)

3218 G03

3218fb

3

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