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参数资料
| 型号： | LTC3522EUD#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.85 A DUAL SWITCHING CONTROLLER, 1330 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封装： | 3 X 3 MM, PLASTIC, M0-220WEED-2, QFN-16 |
| 文件页数： | 14/20页 |
| 文件大小： | 270K |
| 代理商： | LTC3522EUD#TR |
LTC3522
3
3522f
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 LTC3522 is guaranteed to meet performance specications
from 0°C to 85°C. Specications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Current measurements are performed when the LTC3522 is not
switching. The current limit values in operation will be somewhat higher
due to the propagation delay of the comparators.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
PGOOD Threshold
VFB2 Falling
–11.3
–7.7
–4.1
%
Power Good Hysteresis
2.5
%
Buck-Boost Converter
Output Voltage
●
2.2
5.25
V
PMOS Switch Resistance
0.29
Ω
NMOS Switch Resistance
0.22
Ω
NMOS Switch Leakage
VSW1A = VSW1B = 5V, PVIN1 = PVIN2 = 5V
0.1
5
μA
PMOS Switch Leakage
VSW1A = VSW1B = 0V, PVIN1 = PVIN2 = 5V
0.1
10
μA
Feedback Voltage
(Note 4)
●
0.97
1
1.03
V
Feedback Input Current
150
nA
Average Current Limit
(Note 3)
0.65
0.85
A
Burst Mode Current Limit
230
340
mA
Reverse Current Limit
(Note 3)
250
mA
Maximum Duty Cycle
VFB1 = 0.9V
●
70
80
%
Minimum Duty Cycle
VFB1 = 1.1V
●
0%
PGOOD Threshold
VFB1 Falling
–12
–10
–8
%
Power Good Hysteresis
2.5
%
ELECTRICAL CHARACTERISTICS The ● denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. PVIN1 = PVIN2 = 3.6V, VOUT1 = 3.3V unless otherwise noted.
Note 4: The LTC3522 is tested in a proprietary non-switching test mode
that connects each FB pin to the output of the respective error amplier.
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 specied maximum operating junction
temperature may impair device reliability.
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