LTC3603 datasheet(3/22 Pages) LINER

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LTC3603

3603fa

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 LTC3603E is guaranteed to meet performance speciﬁcations

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

junction temperature range are assured by design, characterization and

correlation with statistical process controls. The LTC3603I is guaranteed

over the –40°C to 125°C operating junction temperature range.

Note 3: The LTC3603 is tested in a feedback loop that adjusts VFB to

achieve a speciﬁed error ampliﬁer output voltage (ITH).

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

PVIN

Operating Voltage Range

4.5

VFB

Regulated Feedback Voltage

ITH = 0.7V (Note 3)

0.594

0.6

0.606

ΔVFB(LINEREG)

Feedback Voltage Line Regulation

VIN = 5V to 15V, ITH = 0.7V

0.005

%/V

ΔVFB(LOADREG)

Feedback Voltage Load Regulation

ITH = 0.36V to 0.84V

0.02

0.1

ΔVPGOOD

Power Good Range

±10

±12

RPGOOD

Power Good Resistance

IFB

FB Input Bias Current

Transconductance Ampliﬁer gm

1.7

Supply Current

Active Mode

Sleep Mode

Shutdown

(Note 4)

500

0.2

700

100

μA

INTVCC

VCC LDO Output Voltage

4.7

4.9

5.1

tON, MIN

Minimum Controllable ON-Time

115

VRUN

RUN Pin ON Threshold

VRUN Rising

0.4

0.7

ITRACK/SS

TRACK/SS Pull-Up Current

TRACK/SS = 1V

1.25

μA

fOSC

Oscillator Frequency

RT = 105k

0.85

1.15

MHz

fSYNC

SYNC Capture Range

0.3

MHz

RDS(ON)

Top Switch On-Resistance

Bottom Switch On-Resistance

ILIM

Peak Current Limit

3.8

4.5

5.2

ILSW

Switch Leakage Current

0.1

μA

VUVLO

INTVCC Undervoltage Lockout

INTVCC Ramping Up

4.1

4.2

4.3

VUVLO, HYS

INTVCC Undervoltage Lockout Hysteresis

700

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

junction temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = 12V unless otherwise speciﬁed.

Note 4: Dynamic supply current is higher due to the internal gate charge

being delivered at the switching frequency.

Note 5: TJ is calculated from the ambient temperature TA and the power

dissipation as follows: TJ = TA + (PD)(θJAºC/W).

Note 6: 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 7: This limit indicates the current density limitations of the internal

metallization and it is not tested in production.

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