LTC3534 Linear Dimensions Semiconductor, LTC3534 Datasheet - Page 3

• Manufacturer Part Number: LTC3534
• Description: 500mA Synchronous Buck-Boost DC
• Manufacturer: Linear Dimensions Semiconductor

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ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
PARAMETER
Input Start-Up Voltage
Input Operating Range
Output Voltage Adjust Range
Feedback Voltage
Feedback Input Current
V
Operation
V
V
Input Current Limit
Reverse Current Limit
Burst Current Limit
NMOS Switches Leakage
PMOS Switches Leakage
PMOS Switches On-Resistance
NMOS B Switch On-Resistance
NMOS C Switch On-Resistance
Maximum Duty Cycle
Minimum Duty Cycle
Frequency
Error Amp AV
Error Amp Source Current
Error Amp Sink Current
RUN/SS Threshold
RUN/SS Input Current – Shutdown
RUN/SS Input Current – Active
PWM Threshold
PWM Input Current
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 LTC3534E is guaranteed to meet performance specifi cations
from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
IN
IN
IN
Quiescent Current – Burst Mode
Quiescent Current – Shutdown
Quiescent Current – Active
OL
CONDITIONS
(Note 4)
V
V
V
V
V
V
V
Switches B and C
Switches A and D
Switches A and D
Switch B
Switch C
Boost (% Switch C On)
Buck (% Switch A On)
(Note 4)
V
V
Measured at PWM Pin; Voltage at which Burst Mode Operation is
Disabled (PWMing Enabled)
V
FB
FB
RUN/SS
FB
PWM
PWM
PWM
RUN/SS
RUN/SS
PWM
= Measured Feedback Voltage (Note 4)
= 1.2V, V
= 1.2V, V
= 5V
= 5V
= 0V
= 5V
= 0V, Not Including Switch Leakage, V
= 400mV; IC is Shut Down
= 5V; IC is Enabled
PWM
PWM
= 0V (Note 5)
= 5V (Note 5)
A
= 25°C. V
The
l
IN
denotes the specifi cations which apply over the full operating
= V
OUT
Note 3: 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 specifi ed maximum operating junction
temperature may result in device degradation or failure.
Note 4: The IC is tested in a feedback loop to make this measurement.
Note 5: Current Measurements are performed when the outputs are not
switching.
= 5V, unless otherwise noted.
OUT
= 0V
l
l
l
l
l
l
l
l
l
l
0.975
MIN
0.80
100
2.4
1.8
0.4
0.4
75
1
0.02
0.28
1.25
TYP
420
500
400
260
275
215
–15
225
2.2
0.1
1.8
0.1
0.1
25
85
74
1
1
1
1
1
LTC3534
1.015
MAX
1.15
700
2.4
1.4
1.4
2.5
50
50
10
7
7
1
7
0
1
1
UNITS
3
MHz
3534f
mΩ
mΩ
mΩ
mA
mA
nA
μA
μA
μA
μA
μA
dB
μA
μA
μA
μA
μA
%
%
%
V
V
V
V
A
V
V