LT3495 datasheet(3/16 Pages) LINER

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LT3495/LT3495B/

LT3495-1/LT3495B-1

3495b1b1f

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 LT3495/LT3495B/LT3495-1/LT3495B-1 are guaranteed to

meet performance speciﬁcations from 0°C to 125°C junction temperature.

Speciﬁcations over the –40°C to 125°C operating junction temperature

range are assured by design, characterization and correlation with

statistical process controls.

ELECTRICAL CHARACTERISTICS The l 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)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Switch Current Limit

LT3495-1/LT3495B-1

275

350

450

Switch VCESAT

LT3495/LT3495B, ISW = 400mA

LT3495-1/LT3495B-1, ISW = 200mA

200

125

Switch Leakage Current

VSW = 5V

0.01

μA

PMOS Disconnect Current Limit

After Start-Up

During Start-Up

250

110

370

150

450

190

PMOS Disconnect VCAP – VOUT

IOUT = 50mA, VCAP = 15V

150

VCAP – VOUT Clamp Voltage

8.7

SHDN Input Voltage High

1.5

SHDN Input Voltage Low

0.3

SHDN Pin Bias Current

VSHDN = 3V

VSHDN = 0V

5.3

8μA

μA

CTRL Pin Bias Current

VCTRL = 0.5V, Current Flows Out of Pin

100

CTRL to FB Offset

VCTRL = 0.5V

Maximum Shunt Current

LT3495/LT3495-1, VFB = 1.5V

230

μA

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

level which causes quiescent current to increase 150μA 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.

TYPICAL PERFORMANCE CHARACTERISTICS T

A = 25°C unless otherwise noted.

Switching Frequency

vs Load Current

Load Regulation

VOUT vs CTRL Voltage

LOAD CURRENT (mA)

1000

800

400

200

600

3495 G01

120

100

VCC = 3.6V

VOUT = 16V

FIGURE 7 CIRCUIT

LOAD CURRENT (mA)

1.5

1.0

0.0

–0.5

–1.0

0.5

–1.5

3495 G02

120

100

VCC = 3.6V

VOUT = 16V

FIGURE 7 CIRCUIT

CTRL VOLTAGE (V)

1.2

0.6

3495 G03

1.5

0.9

0.3

FIGURE 7 CIRCUIT

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