Datasheet
LTC3530
3
3530fb
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 LTC3530E 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 correlations
with statistical process controls.
Note 3: Current measurements are performed when the outputs are not
switching.
Note 4: 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 result in device degradation or failure.
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= V
OUT
= 3.6V, R
T
= 33.2k, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
NMOS Switch Leakage Switches B and C 0.1 5 μA
PMOS Switch Leakage Switches A and D 0.1 10 μA
NMOS Switch On Resistance Switches B and C 0.21
Ω
PMOS Switch On Resistance Switches A and D 0.24
Ω
Maximum Duty Cycle Boost (% Switch C On)
Buck (% Switch A On)
l
l
80
100
90 %
%
Minimum Duty Cycle
l
0%
Frequency
l
0.7 1 1.3 MHz
Error Amp AVOL 90 dB
Error Amp Source Current 300 μA
Error Amp Sink Current 300 μA
Burst Threshold 1V
Burst Input Current V
BURST
= 5.5V 2 μA
SHDN/SS Threshold When IC is Enabled
When EA is at Maximum Boost Duty Cycle
l
0.4 0.85
1.6
1.4 V
V
SHDN/SS Input Current V
SHDN
= 5.5V 0.01 1 μA
V
IN
(V)
2.5
V
IN
QUIESCENT CURRENT (mA)
4.0
5.0
3530 G01
3.0 3.5 4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
5.5
2.0 MHz
1.5 MHz
1.0 MHz
0.5 MHz
NO SWITCHING
V
IN
(V)
2.5
V
IN
QUIESCENT CURRENT (μA)
3.0
3.5
4.0 4.5
3530 G02
5.0
50
45
40
35
30
25
20
15
10
5
0
5.5
V
IN
(V)
2.5
2.0
2.5
3.0
4.0 5.0
3530 G03
1.5
1.0
3.0 3.5
4.5 5.5
0.5
0.0
INPUT CURRENT (A)
3.5
Quiescent Current vs V
IN
(Fixed Frequency Mode) Burst Mode Quiescent Current
T
A
= 25°C, unless otherwise specifi ed.
Peak Current Clamp vs V
IN
ELECTRICAL CHARACTERISTICS
TYPICAL PERFORMANCE CHARACTERISTICS