Datasheet

LTC3525-3/
LTC3525-3.3/LTC3525-5
3
3525fb
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 LTC3525E is guaranteed to meet 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 3: Specification is guaranteed by design and not 100% tested in
production.
PARAMETER
CONDITIONS MIN TYP MAX UNITS
Input Start-Up Voltage 0.85 1 V
Output Voltage (Note 6)
l
3.20 3.30 3.40 V
Quiescent Current, V
OUT
SHDN = V
IN
(Note 4) 7 15 µA
Quiescent Current, V
IN
SHDN = V
IN
(Note 4) 0.5 3 µA
Quiescent Current, V
IN
– Shutdown SHDN = 0V, V
OUT
= 0V
Not Including Switch Leakage
0.1 1 µA
NMOS Switch Leakage Current V
IN
= V
OUT
= V
SW
= 5V, SHDN = 0V 0.1 1 µA
PMOS Switch Leakage Current V
IN
= V
SW
= 5V, V
OUT
= 0V, SHDN = 0V 0.1 3 µA
NMOS Switch On-Resistance (Note 3) 0.5
Ω
PMOS Switch On-Resistance (Note 3) 0.8
Ω
Peak Current Limit 0.4 0.45 A
SHDN Threshold Voltage 0.4 0.6 1 V
SHDN Input Current V
SHDN
= V
IN
or V
OUT
0.01 1 µA
(LTC3525-5)
The
l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
IN
= 2.4V, V
SHDN
= 2.4V, V
OUT
= 5V unless otherwise noted.
PARAMETER
CONDITIONS MIN TYP MAX UNITS
Input Start-Up Voltage 0.85 1 V
Output Voltage (Note 6)
l
4.85 5.00 5.15 V
Quiescent Current, V
OUT
SHDN = V
IN
(Note 4) 8 18 µA
Quiescent Current, V
IN
SHDN = V
IN
(Note 4) 1.5 5 µA
Quiescent Current, V
IN
– Shutdown SHDN = 0V, V
OUT
= 0V
Not Including Switch Leakage
0.1 1 µA
NMOS Switch Leakage Current V
IN
= V
OUT
= V
SW
= 5V, SHDN = 0V 0.1 1 µA
PMOS Switch Leakage Current V
IN
= V
SW
= 5V, V
OUT
= 0V, SHDN = 0V 0.1 3 µA
NMOS Switch On-Resistance (Note 3) 0.4
Ω
PMOS Switch On-Resistance (Note 3) 0.7
Ω
Peak Current Limit 0.4 0.5 A
SHDN Threshold Voltage 0.4 0.6 1 V
SHDN Input Current V
SHDN
= V
IN
or V
OUT
0.01 1 µA
Note 4: Current Measurements are performed when the LTC3525 is not
switching.
Note 5: 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 reliability.
Note 6: Consult LTC Marketing for other output voltage options.
The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
IN
= 1.2V, V
SHDN
= 1.2V, V
OUT
= 3.3V unless otherwise noted.
ELECTRICAL CHARACTERISTICS
(LTC3525-3.3)