Linear Technology DC1227A - LTC3534EDHC Demo board | 5V, 500mA Synchronous Buck-Boost DC/DC Converter DC1227A DC1227A 데이터 시트
제품 코드
DC1227A
LTC3534
3
3534fb
elecTrical characTerisTics
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 specifications
Note 2: The LTC3534E 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.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Start-Up Voltage
l
2.2
2.4
V
Input Operating Range
l
2.4
7
V
Output Voltage Adjust Range
l
1.8
7
V
Feedback Voltage
(Note 4)
l
0.975
1
1.015
V
Feedback Input Current
V
FB
= Measured Feedback Voltage (Note 4)
1
50
nA
V
IN
Quiescent Current – Burst Mode
Operation
V
FB
= 1.2V, V
PWM
= 0V (Note 5)
25
50
µA
V
IN
Quiescent Current – Shutdown
V
RUN/SS
= 0V, Not Including Switch Leakage, V
OUT
= 0V
0.1
1
µA
V
IN
Quiescent Current – Active
V
FB
= 1.2V, V
PWM
= 5V (Note 5)
420
700
µA
Input Current Limit
V
PWM
= 5V
l
1
1.8
A
Reverse Current Limit
V
PWM
= 5V
500
mA
Burst Current Limit
V
PWM
= 0V
400
mA
NMOS Switches Leakage
Switches B and C
0.1
7
µA
PMOS Switches Leakage
Switches A and D
0.1
10
µA
PMOS Switches On-Resistance
Switches A and D
260
mΩ
NMOS B Switch On-Resistance
Switch B
275
mΩ
NMOS C Switch On-Resistance
Switch C
215
mΩ
Maximum Duty Cycle
Boost (% Switch C On)
Buck (% Switch A On)
l
l
75
100
85
%
%
Minimum Duty Cycle
l
0
%
Frequency
l
0.80
1
1.15
MHz
Error Amp AV
OL
(Note 4)
74
dB
Error Amp Source Current
–15
µA
Error Amp Sink Current
225
µA
RUN/SS Threshold
l
0.4
1
1.4
V
RUN/SS Input Current – Shutdown
V
RUN/SS
= 400mV; IC is Shut Down
0.02
1
µA
RUN/SS Input Current – Active
V
RUN/SS
= 5V; IC is Enabled
0.28
1
µA
PWM Threshold
Measured at PWM Pin; Voltage at which Burst Mode Operation is
Disabled (PWMing Enabled)
0.4
1
1.4
V
PWM Input Current
V
PWM
= 5V
1.25
2.5
µA
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
= 5V, unless otherwise noted.
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 specified 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
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.