LTC3225/LTC3225-1

3

3225fb

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range

l

l

2.8

2.8

5.5

5.5

V

V

Charge Termination Voltage

Sleep Mode Threshold (Rising Edge)

l

l

4.4

3.9

4.5

4.0

4.6

4.1

V

V

Output Comparator Hysteresis

100

mV

Maximum Voltage Across Each of the

Supercapacitors After Charging

l

l

2.35

2.1

V

V

LTC3225/LTC3225-1

l

20

40

μA

Shutdown Current

l

0.1

1

μA

Input Supply Removed

l

l

1

2

3

4

1

μA

μA

μA

Input Charge Current

306

mA

55

mA

Output Charge Current

125

150

175

mA

26

mA

PGOOD Low Output Voltage

l

0.4

V

PGOOD High Impedance Leakage Current

l

10

μA

PGOOD Low-to-High Threshold

Relative to Output Voltage Threshold

l

92

94

96

%

PGOOD Threshold Hysteresis

Relative to Output Voltage Threshold

l

0.25

1.2

2.5

%

Effective Open-Loop Output Impedance

(Note 4)

8

9

Ω

CLK Frequency

l

0.6

0.9

1.5

MHz

Input High Voltage

l

1.3

V

Input Low Voltage

l

0.4

V

Input High Current

l

–1

1

μA

Input Low Current

l

–1

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: Based on long-term current density limitations.

Note 3: The LTC3225/LTC3225-1 are tested under pulsed load conditions

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 4: Output not in regulation;