LTC3414 datasheet(2/16 Pages) LINER

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LTC3414

3414f

Input Supply Voltage ................................... –0.3V to 6V

ITH, RUN/SS, VFB,

SYNC/MODE Voltages .................................. –0.3 to VIN

SW Voltages ................................. –0.3V to (VIN + 0.3V)

Peak SW Sink and Source Current ......................... 9.5A

Operating Ambient Temperature Range

(Note 2) .............................................. – 40

°C to 85°C

Junction Temperature (Notes 5, 6) ....................... 125

°C

Storage Temperature Range ................. – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300

°C

ORDER PART

NUMBER

EXPOSED PAD (PIN 21)

MUST BE SOLDERED TO PCB

TJMAX = 125°C, θJA = 38°C/W, θJC = 10°C/W

LTC3414EFE

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

(Note 1)

ELECTRICAL CHARACTERISTICS

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: The LTC3414E is guaranteed to meet performance specifications

from 0

°C to 70°C. Specifications over the –40°C to 85°C operating

ambient temperature range are assured by design, characterization and

correlation with statistical process controls.

Note 3: The LTC3414 is tested in a feedback loop that adjusts VFB to

achieve a specified error amplifier output voltage (ITH).

The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 3.3V unless otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Input Voltage Range

2.25

5.5

IFB

Feedback Pin Input Current

(Note 3)

0.2

µA

VFB

Regulated Feedback Voltage

(Note 3)

0.784

0.800

0.816

∆VFB

Reference Voltage Line Regulation

VIN = 2.7V to 5.5V (Note 3)

0.04

0.2

VLOADREG

Output Voltage Load Regulation

Measured in Servo Loop, VITH = 0.36V

0.02

0.2

Mesured in Servo Loop, VITH = 0.84V

–0.02

–0.2

∆VPGOOD

Power Good Range

±7.5

±9%

RPGOOD

Power Good Resistance

120

200

Ω

Input DC Bias Current

(Note 4)

Active Current

VFB = 0.75V, VITH = 1.2V

250

330

µA

Sleep

VFB = 1V, VITH = 0V, VSYNC/MODE = 0V

100

µA

Shutdown

VRUN = 0V

0.02

µA

fOSC

Switching Frequency

ROSC = 294k

0.88

1.00

1.12

MHz

Switching Frequency Range

0.3

MHz

fSYNC

SYNC Capture Range

0.3

MHz

RPFET

RDS(ON) of P-Channel FET

ISW = 300mA

100

Ω

RNFET

RDS(ON) of N-Channel FET

ISW = –300mA

100

Ω

ILIMIT

Peak Current Limit

VUVLO

Undervoltage Lockout Threshold

1.75

2.00

2.25

ILSW

SW Leakage Current

VRUN = 0V, VIN = 5.5V

0.1

1.0

µA

VRUN

RUN Threshold

0.5

0.65

0.8

Consult LTC Marketing for parts specified with wider operating temperature ranges.

TOP VIEW

PGND

SYNC/MODE

RUN/SS

SGND

PVIN

PGND

VFB

ITH

PGOOD

SVIN

PVIN

PGND

FE PACKAGE

20-LEAD PLASTIC TSSOP

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 power

dissipation PD as follows: TJ =TA + (PD)(38°C/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 reliabiability.

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