參數(shù)資料
型號(hào)： LTC3527EUD-1#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 0.8 A DUAL SWITCHING CONTROLLER, 2800 kHz SWITCHING FREQ-MAX, PQCC16
封裝： 3 X 3 MM, 0.75 MM HEIGHT, PLASTIC, MO-220WEED-2, QFN-16
文件頁(yè)數(shù)： 16/22頁(yè)
文件大小： 359K
代理商： LTC3527EUD-1#TR
LTC3527/LTC3527-1
3
35271fc
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 LTC3527E/LTC3527E-1 are 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 is measured into the VOUT pin since the supply current is
bootstrapped to the output. The current will reect to the input supply by:
(VOUT/VIN) (1/Efciency). All switches are off.
The
l denotes the specications which apply over the full operating
temperature range, –40°C to 85°C. VIN = VIN1 = VIN2 = 1.2V, VOUT1 = VOUT2 = 3.3V, TA = 25°C, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
PMOS Switch Leakage Current (LTC3527)
VSW1,2 = 5V, VOUT1,2 = 0V, SHDN1,2 = 0V
0.1
10
μA
NMOS and PMOS Combined Switch Leakage Current
(LTC3527-1)
VSW1,2 = 5V, VOUT1,2 = 0V, SHDN1,2 = 0V (Note 6)
0.2
20
μA
NMOS Switch On-Resistance, SW1
0.30
Ω
NMOS Switch On-Resistance, SW2
0.50
Ω
PMOS Switch On-Resistance, SW1
0.40
Ω
PMOS Switch On-Resistance, SW2
0.60
Ω
NMOS Current Limit, SW1
l
800
mA
NMOS Current Limit, SW2
l
400
mA
Current Limit Delay to Output Time
(Note 4)
60
ns
Maximum Duty Cycle
VFB1,2 = 1V
l
85
90
%
Minimum Duty Cycle
VFB1,2 = 1.3V
l
0%
Switching Frequency
VFSEL = 0V
l
0.9
1.2
1.5
MHz
Switching Frequency
VFSEL = 3.3V
l
1.8
2.2
2.8
MHz
SHDN1,2 Input High Voltage
0.88
V
SHDN1,2 Input Low Voltage
0.35
V
SHDN1,2 Input Current
VSHDN1,2 = 3.3V
1
2
μA
PGOOD1, PGOOD2 Threshold
Referenced to the Feedback Voltage
–6
–9
–14
%
PGOOD1, PGOOD2 Low Voltage
IPGOOD1,2 = 1mA
0.1
0.2
V
PGOOD1, PGOOD2 Leakage Current
VPGOOD1,2 = 5.25V
0.01
1
μA
MODE Input High Voltage
1V
MODE Input Low Voltage
0.35
V
MODE Input Current
VMODE = 3.3V
1
2
μA
FSEL Input High Voltage
0.88
V
FSEL Input Low Voltage
0.35
V
FSEL Input Current
VFSEL = 3.3V
1
2
μA
Soft-Start Time
0.5
ms
Note 4: Specication is guaranteed by design and not 100% tested in
production.
Note 5: The LTC3527/LTC3527-1 includes an overtemperature shutdown
that is intended to protect the device during momentary overload
conditions. Junction temperature will exceed 125°C when the over-
temperature shutdown is active. Continuous operation above the specied
maximum junction temperature may impair device reliability.
Note 6: The NMOS and PMOS switch leakage currents are tested in parallel
for the LTC3527-1 because VOUT1,2 are actively pulled to ground when
SHDN1,2 = 0V
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