LT3494 datasheet(3/12 Pages) LINER

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LT3494/LT3494A

3494fb

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: The LT3494/LT3494A are guaranteed to meet performance

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

operating temperature range are assured by design, characterization and

correlation with statistical process controls.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

CTRL Pin Bias Current

VCTRL = 0.5V, Current Flows Out of Pin

●

100

CTRL to FB Offset

VCTRL = 0.5V

Maximum Shunt Current

VFB = 1.3V, VCAP = 5V

230

μA

Note 3: Internal reference voltage is determined by ﬁnding VFB voltage

level which causes quiescent current to increase 20μA above “Not

Switching” level.

Note 4: If CTRL is overriding the internal reference, Start-Up mode occurs

when VFB is less then half the voltage on CTRL. If CTRL is not overriding

the internal reference, Start-Up mode occurs when VFB is less then half the

voltage of the internal reference.

Note 5: Current limit guaranteed by design and/or correlation to static test.

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

temperature range, otherwise speciﬁcations are at TA = 25°C. VCC = 3V, VSHDN = VCC, unless otherwise noted. (Note 2)

TYPICAL PERFORMANCE CHARACTERISTICS

Switching Frequency

vs Load Currrent

Load Regulation

VOUT vs CTRL Voltage

LOAD CURRENT (mA)

0.1

800

1000

1200

1400

100

3494 G01

600

400

200

LT3494

FIGURE 5 CIRCUIT

VCC = 3.6V

VOUT = 16V

LOAD CURRENT (mA)

1.0

3494 G02

–1.0

–2.0

2.0

–0.5

0.5

–1.5

1.5

LT3494

FIGURE 5 CIRCUIT

VCC = 3.6V

VOUT = 16V

CTRL VOLTAGE (V)

0.1

0.3

0.5

0.7

0.9

3494 G03

1.1

1.3

1.5

LT3494

FIGURE 5 CIRCUIT

VCC = 3.6V

VOUT = 16V

LOAD CURRENT = 1mA

TA = 25°C unless otherwise noted.

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