LTC3525D-3.3_15 Datasheet, PDF (3/14 Pages) Linear Technology – 400mA Micropower Synchronous Step-Up DC/DC Converter with Pass Through Mode

LTC3525D-3.3
Electrical Characteristics
The l denotes the specifications which apply over the full operating junction 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. (Note 2)
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 = V_IN = 3.3V
Including Switch Leakage
3
10
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
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 LTC3525D is tested under pulsed load conditions such that
T_J ≈ T_A. The LTC3525DE is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3525DI is guaranteed
over the –40°C to 125°C operating junction temperature range. Note that
the maximum ambient temperature consistent with these specifications
is determined by specific operating conditions in conjunction with board
layout, the rated package thermal impedance and other environmental
factors. T_J is calculated from the ambient temperature T_A and power
dissipation PD according to the following formula:
T_J = T_A + (P_D • 150°C/W)
Note 3: Specification is guaranteed by design and not 100% tested in
production.
Note 4: Current Measurements are performed when the LTC3525D 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.
For more information www.linear.com/LTC3525D3.3
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