LTC3406AB データシートの表示（PDF） - Linear Technology

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LTC3406AB

1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT

Linear Technology 

LTC3406AB

Electrical Characteristics The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V unless otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

IVFB

VFB

DVFB

IPK

VLOADREG

VIN

IS

fOSC

RPFET

RNFET

ILSW

tSOFTSTART

VRUN

IRUN

Feedback Current

Regulated Feedback Voltage

Reference Voltage Line Regulation

Peak Inductor Current

Output Voltage Load Regulation

Input Voltage Range

Input DC Bias Current

Active Mode

Shutdown

Oscillator Frequency

RDS(ON) of P-Channel FET

RDS(ON) of N-Channel FET

SW Leakage

Soft-Start Time

RUN Threshold

RUN Leakage Current

(Note 4)

VIN = 2.5V to 5.5V (Note 4)

VIN = 3V, VFB = 0.5V

Duty Cycle < 35%

(Note 5)

VFB = 0.63V

VRUN = 0V, VIN = 5.5V

VFB = 0.6V

ISW = 100mA

ISW = –100mA

VRUN = 0V, VSW = 0V or 5V, VIN = 5V

VFB from 10% to 90% Full-scale

l

±30

nA

l 0.5880 0.6 0.6120

V

l

0.04

0.4

%/V

0.75

1

1.25

A

0.5

%

l 2.5

5.5

V

200

300

µA

0.1

1

µA

l 1.2

1.5

1.8

MHz

0.23 0.35

W

0.21 0.35

W

±0.01 ±1

µA

0.6

0.9

1.2

ms

l 0.3

1

1.5

V

l

±0.01 ±1

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 LTC3406ABE 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.

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

dissipation PD according to the following formula:

LTC3406AB: TJ = TA + (PD)(250°C/W)

Note 4: The LTC3406AB is tested in a proprietary test mode that connects

VFB to the output of the error amplifier.

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

delivered at the switching frequency.

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: Limited by long term current density considerations.

For more information www.linear.com/LTC3406AB

3406abfb

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