LTC3404 datasheet(2/16 Pages) LINER

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LTC3404

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IVFB

Feedback Current

(Note 4)

430

VFB

Regulated Output Voltage

(Note 4) 0

°C ≤ TA ≤ 85°C

0.784

0.8

0.816

(Note 4) – 40

°C ≤ TA ≤ 85°C

0.74

0.8

0.84

∆VOVL

Output Overvoltage Lockout

∆VOVL = VOVL – VFB

110

∆VFB

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

0.5

Measured in Servo Loop; VITH = 1.6V to 1.2V

– 0.1

– 0.5

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

0.5

0.7

Ω

RNFET

RDS(ON) of N-Channel MOSFET

ISW = –100mA

0.6

0.8

Ω

LTC3404EMS8

TJMAX = 125°C, θJA = 150°C/ W

ORDER PART

NUMBER

(Note 1)

Input Supply Voltage (VIN)...........................– 0.3V to 7V

ITH, PLL LPF Voltage ................................–0.3V to 2.7V

RUN, VFB Voltages ...................................... – 0.3V to VIN

SYNC/MODE Voltage .................................. – 0.3V to VIN

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

P-Channel MOSFET Source Current (DC) ........... 800mA

N-Channel MOSFET Sink Current (DC) ............... 800mA

Peak SW Sink and Source Current ........................ 1.5A

Operating Ambient Temperature Range

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

°C to 85°C

Junction Temperature (Note 3) ............................ 125

°C

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

°C to 150°C

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

°C

TOP VIEW

MS8 PACKAGE

8-LEAD PLASTIC MSOP

PLL LPF

SYNC/MODE

VIN

RUN

ITH

VFB

GND

MS8 PART MARKING

Consult factory for parts specified with wider operating temperature ranges.

The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.

VIN = 3.6V unless otherwise specified.

LTKR

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ELECTRICAL CHARACTERISTICS

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