LTC3108-1

3

31081fa

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 LTC3108-1 is tested under pulsed load conditions such that

0°C to 85°C junction temperature. Specifications over the –40°C to

125°C operating junction temperature range are assured by design,

characterization and correlation with statistical process controls. The

LTC3108-1I is guaranteed over the full –40°C to 125°C operating junction

temperature range. Note that the maximum ambient temperature

is determined by specific operating conditions in conjunction with

board layout, the rated thermal package thermal resistance and other

impedance.

Note 3: Specification is guaranteed by design and not 100% tested in

production.

Note 4: Failure to solder the exposed backside of the package to the PC

board ground plane will result in a thermal resistance much higher than

43°C/W.

Note 5: The absolute maximum rating is a DC rating. Under certain

conditions in the applications shown, the peak AC voltage on the C2 pin

may exceed ±8V. This behavior is normal and acceptable because the

current into the pin is limited by the impedance of the coupling capacitor.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Output Voltage

VS1 = VS2 = GND

VS1 = VAUX, VS2 = GND

VS1 = GND, VS2 = VAUX

VS1 = VS2 = VAUX

l

l

l

l

2.45

2.94

3.626

4.41

2.50

3.00

3.70

4.50

2.55

3.06

3.774

4.59

V

V

V

V

0.2

μA

VAUX Quiescent Current

No Load, All Outputs Charged

6

9

μA

LDO Output Voltage

0.5mA Load

l

2.134

2.2

2.266

V

LDO Load Regulation

For 0mA to 2mA Load

0.5

1

%

LDO Line Regulation

For VAUX from 2.5V to 5V

0.05

0.2

%

LDO Dropout Voltage

l

100

200

mV

LDO Current Limit

VLDO = 0V

l

411

mA

l

2.8

4.5

7

mA

VSTORE Current Limit

VSTORE = 0V

l

2.8

4.5

7

mA

VAUX Clamp Voltage

Current into VAUX = 5mA

l

5

5.25

5.55

V

VSTORE Leakage Current

VSTORE = 5V

0.1

0.3

μA

0.1

μA

VS1, VS2 Threshold Voltage

l

0.4

0.85

1.2

V

VS1, VS2 Input Current

VS1 = VS2 = 5V

0.01

0.1

μA

PGD Threshold (Rising)

–7.5

%

PGD Threshold (Falling)

–9

%

Sink Current = 100μA

0.15

0.3

V

Source Current = 0

2.1

2.2

2.3

V

PGD Pull-Up Resistance

1MΩ

l

0.4

1

1.3

V

5MΩ

5μs

(Note 3)

0.15

μs

l

0.15

0.3

0.45

A

(Note 3)

350

ns

1.3

Ω

N-Channel MOSFET On-Resistance

C2 = 5V (Note 3)

0.5

Ω