LTC3025 datasheet(3/12 Pages) LINER

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LTC3025

3025fd

ELECTRICAL CHARACTERISTICS

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: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C when overtemperature protection is active.

Continuous operation above the speciﬁed maximum operating junction

temperature may impair device reliability.

Note 3: The LTC3025 regulator is tested and speciﬁed under pulse

load conditions such that TJ ≈ TA. The LTC3025 is 100% production

tested at 25°C. Performance at –40°C and 125°C is assured by design,

characterization and correlation with statistical process control. The

LTC3025I is guaranteed to meet performance speciﬁcations over the full

–40°C and 125°C operating junction temperature range.

The

l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = 1.5V, VBIAS = 3.6V, VOUT = 1.2V, COUT = 1μF, CIN = 0.1μF,

CBIAS = 0.1μF (all capacitors ceramic) unless otherwise noted. (Note 3)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN to VOUT Dropout Voltage (Notes 4, 6, 7)

VBIAS = 2.8V, VIN = 1.5V, VADJ = 0.37V, IOUT = 300mA

100

VBIAS to VOUT Dropout Voltage (Note 4)

1.4

IOUT Continuous Output Current

300

IOUT Current Limit

VADJ = 0V

680

en Output Voltage Noise

f = 10Hz to 100kHz, IOUT = 300mA

μVRMS

VIH SHDN Input High Voltage

0.9

VIL SHDN Input Low Voltage

0.3

IIH SHDN Input High Current

SHDN = 1.2V

–1

μA

IL SHDN Input Low Current

SHDN = 0V

–1

μA

Note 4: For the LTC3025, a regulated output voltage will only be available

when the minimum IN and BIAS Operating Voltages as well as the IN to

OUT and BIAS to OUT Dropout Voltages are all satisﬁed.

Note 5: Operating conditions are limited by maximum junction

temperature. The regulated output voltage speciﬁcation will not apply

for all possible combinations of input voltage and output current. When

operating at maximum input voltage, the output current range must be

limited. When operating at maximum output current, the input voltage

range must be limited.

Note 6: Dropout voltage is minimum input to output voltage differential

needed to maintain regulation at a speciﬁed output current. In dropout, the

output voltage will be equal to VIN – VDROPOUT.

Note 7: The DFN output FET on-resistance in dropout is guaranteed by

correlation to wafer level measurements.

TYPICAL PERFORMANCE CHARACTERISTICS

Dropout Voltage vs IOUT

Operating BIAS Current

vs Output Load

BIAS No Load Operating Current

IOUT (mA)

150

250

3025 G01

100

200

300

TA = –40°C

TA = 125°C

TA = 25°C

VBIAS = 2.8V

IOUT (mA)

0.01

150

200

250

1000

3025 G02

100

0.1

100

300

350

400

–40°C

25°C

125°C

VBIAS (V)

2.5

3025 G03

3.5

4.5

5.5

VIN = 1.5V

VOUT = 1.2V

125°C

25°C

–40°C

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