LTC3408EDD datasheet(2/12 Pages) LINER

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LTC3408

3408f

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VOUT

Regulated Output Voltage

VREF = 1.1V

●

3.23

3.3

3.37

VREF = 0.1V

●

0.25

0.3

0.35

∆VOUT

Output Voltage Line Regulation

VIN = 2.5V to 5V, VREF = 0.6V

●

0.1

0.4

%/V

IPK

Peak Inductor Current

VIN = 3V, VREF = 0.9V

0.70

1.25

VLOADREG

Output Voltage Load Regulation

0.7

VIN

Input Voltage Range

●

2.5

Input Current

VRUN = 1.2V, SW = Open

1.5

2.5

Shutdown Current

VRUN = 0V, SW = Open

0.1

µA

fOSC

Oscillator Frequency

VREF≥ 0.25V

●

1.2

1.5

1.8

MHz

VREF ≤ 0.1V

550

700

850

kHz

VREF

Bypass PFET Turn-Off Threshold

VREF =

1.167

1.2

Bypass PFET Turn-On Threshold

VREF =

1.21

1.26

RPFET

RDS(ON) of P-Channel FET

ISW = 160mA, Wafer Level

0.3

0.4

Ω

ISW = 160mA, DD Package

0.4

Ω

RNFET

RDS(ON) of N-Channel FET

ISW = –160mA, Wafer Level

0.3

0.4

Ω

ISW = –160mA, DD Package

0.4

Ω

RBYPASS

RDS(ON) of Bypass P-Channel FET

IOUT = 100mA, VIN = 3V, Wafer Level

0.05

0.08

Ω

IOUT = 100mA, VIN = 3V, DD Package (Note 4)

0.08

Ω

ILSW

SW Leakage

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

±0.01

±1

µA

ILBYP

Bypass PFET Leakage

VOUT = 0V, VIN = 5V, VREF = 0V

±0.01

±1

µA

VRUN

RUN Threshold

●

0.3

1.5

IRUN

RUN Input Current

VRUN = 0V or 2.5V

●

±0.01

±1

µA

IREF

REF Input Current

●

±0.01

±1

µA

Input Supply Voltage (< 300

µs) .................. –0.3V to 6V

Input Supply Voltage (DC) ....................... – 0.3V to 5.5V

RUN, REF, VOUT Voltages .......................... – 0.3V to VIN

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

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

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

Peak SW Sink and Source Current ........................ 1.3A

Bypass P-Channel FET Source Current (DC) .............. 1A

Operating Temperature Range (Note 2) .. – 40

°C to 85°C

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

°C

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

°C to 125°C

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

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

(Note 1)

LTC3408EDD

ORDER PART

NUMBER

DD PART MARKING

LAEA

TJMAX = 125°C, θJA = 43°C/ W, θJC = 3°C/ W

The

● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25

°C.

VIN = 3.6V unless otherwise specified.

ELECTRICAL CHARACTERISTICS

VOUT

VIN

REF

RUN

VOUT

VIN

GND

TOP VIEW

DD PACKAGE

8-LEAD (3mm

× 3mm) PLASTIC DFN

EXPOSED PAD IS GND (PIN 9)

MUST BE SOLDERED TO PCB

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

of a device may be impaired.

Note 2: The LTC3408E is guaranteed to meet performance specifications

from 0

°C to 70°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:

LTC3408: TJ = TA + (PD)(43°C/W)

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