LT3495BEDDB-TRPBF Ver la hoja de datos (PDF) - Linear Technology

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LT3495BEDDB-TRPBF

650mA/350mA Micropower Low Noise Boost Converter with Output Disconnect

Linear Technology 

LT3495/LT3495B/

LT3495-1/LT3495B-1

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

l 275

350

450

mA

Switch VCESAT

Switch Leakage Current

PMOS Disconnect Current Limit

LT3495/LT3495B, ISW = 400mA

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

VSW = 5V

After Start-Up

During Start-Up

200

mV

125

mV

0.01

1

μA

250

370

450

mA

110

150

190

mA

PMOS Disconnect VCAP – VOUT

VCAP – VOUT Clamp Voltage

SHDN Input Voltage High

SHDN Input Voltage Low

SHDN Pin Bias Current

CTRL Pin Bias Current

CTRL to FB Offset

Maximum Shunt Current

IOUT = 50mA, VCAP = 15V

VSHDN = 3V

VSHDN = 0V

VCTRL = 0.5V, Current Flows Out of Pin

VCTRL = 0.5V

LT3495/LT3495-1, VFB = 1.5V

150

mV

8.7

V

1.5

V

0.3

V

5.3

8

μA

0

μA

l

20

100

nA

6

14

mV

230

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: 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.

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 TA = 25°C unless otherwise noted.

Switching Frequency

vs Load Current

1000

800

VCC = 3.6V

VOUT = 16V

FIGURE 7 CIRCUIT

600

400

200

0

0 20 40 60 80 100 120

LOAD CURRENT (mA)

3495 G01

Load Regulation

1.5

VCC = 3.6V

VOUT = 16V

1.0 FIGURE 7 CIRCUIT

0.5

0.0

–0.5

–1.0

–1.5

0

20 40 60 80 100 120

LOAD CURRENT (mA)

3495 G02

VOUT vs CTRL Voltage

18

FIGURE 7 CIRCUIT

15

12

9

6

3

0

0

0.3 0.6 0.9 1.2 1.5

CTRL VOLTAGE (V)

3495 G03

3495b1b1f

3

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