LTC3404MPMS8 datasheet(3/16 Pages) LINER

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LTC3404

3404fb

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 LTC3404E is 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. The LTC3404I is guaranteed to meet

performance specifications over the –40

°C to 85°C operating temperature

range. The LTC3404MP is guaranteed to meet performance specifications

over the –55

°C to 125°C operating temperature range.

Note 3: TJ is calculated from the ambient temperature TA and power

dissipation PD according to the following formulas:

TJ = TA + (PD)(150°C/W)

Note 4: The LTC3404 is tested in a feedback loop which servos VFB to the

balance point for the error amplifier (VITH = 1.2V).

Note 5: Dynamic supply current is higher due to the gate charge being

delivered at the switching frequency.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IVFB

Feedback Current

(Note 4)

VFB

Regulated Output Voltage

(Note 4) 0

°C ≤ TA ≤ 125°C

0.784

0.8

0.816

(Note 4) – 55

°C ≤ TA ≤ 125°C

0.74

0.8

0.84

ΔVOVL

Output Overvoltage Lockout

ΔVOVL = VOVL – VFB

110

ΔVFB

Reference Voltage Line Regulation

VIN = 2.65V to 6V (Note 4)

0.05

0.2

%/V

VLOADREG

Output Voltage Load Regulation

Measured in Servo Loop; VITH = 0.9V to 1.2V

0.1

Measured in Servo Loop; VITH = 1.5V to 1.2V

– 0.1

– 1

VIN

Input Voltage Range

2.65

Input DC Bias Current

(Note 5)

Pulse Skipping Mode

2.65V < VIN < 6V, VSYNC/MODE = 0V, IOUT = 0A

400

700

μA

Burst Mode Operation

VSYNC/MODE = VIN, IOUT = 0A

μA

Shutdown

VRUN = 0V, VIN = 6V

μA

fOSC

Oscillator Frequency

VFB = 0.8V

1.25

1.4

1.65

MHz

VFB = 0V

200

kHz

fSYNC

SYNC Capture Range

1.0

1.7

MHz

IPLL LPF

Phase Detector Output Current

Sinking Capability

fPLLIN < fOSC

μA

Sourcing Capability

fPLLIN > fOSC

–6

–20

–40

μA

RPFET

RDS(ON) of P-Channel MOSFET

ISW = 100mA

0.7

RNFET

RDS(ON) of N-Channel MOSFET

ISW = –100mA

0.8

IPK

Peak Inductor Current

VIN = 3.3V, VFB = 0.7V, Duty Cycle < 35%,

0.4

1.0

1.1

TA = 125°C

VIN = 4V, VFB = 0.7V, Duty Cycle < 35%,

0.8

1.2

TA = 125°C

ILSW

SW Leakage

VRUN = 0V, VSW = 0V or 6V, VIN = 6V

±3

μA

VSYNC/MODE SYNC/MODE Threshold

VSYNC/MODE Rising

0.3

1.5

ISYNC/MODE

SYNC/MODE Leakage Current

±1

μA

VRUN

RUN Threshold

VRUN Rising

0.3

1.5

IRUN

RUN Input Current

±1

μA

The

● denotes specifications which apply over –55

°C to 125°C, otherwise specifications are TA = 25°C.

VIN = 3.6V unless otherwise specified.

ELECTRICAL CHARACTERISTICS

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