LTC3530 Datasheet, PDF (3/16 Pages) Linear Technology – Wide Input Voltage Synchronous Buck-Boost DC/DC Converter

LTC3530
ELECTRICAL CHARACTERISTICS _{The l denotes the specifications which apply over the full operating}
temperature range, otherwise specifications 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 80
90
%
l ₁₀₀
%
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
1
V
Burst Input Current
SHDN/SS Threshold
SHDN/SS Input Current
V_BURST = 5.5V
When IC is Enabled
When EA is at Maximum Boost Duty Cycle
V_SHDN = 5.5V
2
μA
l 0.4
0.85
1.4
V
1.6
V
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 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.
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C, unless otherwise specified.
Quiescent Current vs V_IN
(Fixed Frequency Mode)
4.0
3.5
2.0 MHz
3.0
1.5 MHz
2.5
2.0
1.0 MHz
1.5
0.5 MHz
1.0
NO SWITCHING
0.5
0.0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
V_IN (V)
3530 G01
Burst Mode Quiescent Current
50
45
40
35
30
25
20
15
10
5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
V_IN (V)
3530 G02
Peak Current Clamp vs V_IN
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.5 3.0
3.5 4.0 4.5
V_IN (V)
5.0 5.5
3530 G03
3530fb
3