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參數(shù)資料
| 型號： | LTC3568IDD#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 4 A SWITCHING REGULATOR, 4000 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 300K |
| 代理商： | LTC3568IDD#TR |
LTC3568
3568fa
fOSC
Oscillator Frequency
RT = 324k
(Note 7)
0.85
1
1.15
4
MHz
fSYNC
Synchronization Frequency
(Note 7)
0.4
4
MHz
ILIM
Peak Switch Current Limit
ITH = 1.3
2.4
3
4
A
RDS(ON)
Top Switch On-Resistance (Note 6)
VIN = 3.3V
0.11
0.15
Ω
Bottom Switch On-Resistance (Note 6)
VIN = 3.3V
0.11
0.15
Ω
ISW(LKG)
Switch Leakage Current
VIN = 6V, VITH/RUN = 0V, VFB = 0V
0.01
1
A
VUVLO
Undervoltage Lockout Threshold
VIN Ramping Down
2
2.25
V
PGOOD
Power Good Threshold
VFB Ramping Up, SHDN/RT = 1V
VFB Ramping Down, SHDN/RT = 1V
6.8
–7.6
%
RPGOOD
Power Good Pull-Down On-Resistance
118
200
Ω
elecTrical characTerisTics
Theldenotesthespecificationswhichapplyoverthefulloperating
temperaturerange,otherwisespecificationsareatTA=25°C.VIN=3.3V,RT=324kunlessotherwisespecified.(Note2)
Note1: 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.
Note2: The LTC3568 is tested under pulsed load conditions such that TJ =
TA. The LTC3568E is guaranteed to meet performance specifications from
0°C to 85°C. Specifications over the –40°C to 125°C operating junction
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3568I is guaranteed over the
full –40°C to 125°C operating junction temperature range. The maximum
ambient temperature is determined by specific operating conditions in
conjunction with board layout, the rated package thermal resistors and
other environmental factors.
Note3: The LTC3568 is tested in a feedback loop which servos VFB to the
midpoint for the error amplifier (VITH = 0.6V).
Note4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note5: TJ is calculated from the ambient TA and power dissipation PD
according to the following formula:
TJ = TA + (PD 43°C/W)
Note6: Switch on-resistance is guaranteed by correlation to wafer level
measurements.
Note7: 4MHz operation is guaranteed by design but not production tested
and is subject to duty cycle limitations (see Applications Information).
Note8: 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 impair device reliability.
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