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參數(shù)資料
| 型號(hào)： | LTC3618EUF#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 8 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封裝： | 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD, QFN-24 |
| 文件頁數(shù)： | 19/24頁 |
| 文件大?。?/td> | 603K |
| 代理商： | LTC3618EUF#TRPBF |
LTC3618
4
3618f
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VMODE
(Note 9)
VMODE High Voltage
Pulse-Skipping Mode
1.0
V
VMODE Low Voltage
Forced Continuous Mode
0.4
V
PGOOD1
Power Good Voltage Window of
VDDQ
TRACK/SS1 = SVIN, Entering Window
VFB1 Ramping Up
VFB1 Ramping Down
2
–5
5
–2
%
TRACK/SS1 = SVIN, Leaving Window
VFB1 Ramping Up
VFB1 Ramping Down
–10.5
8
–8
10.5
%
PGOOD2
Power Good Voltage Window of VTT
Entering Window
VTT Ramping Up
VTT Ramping Down
2.5
–5
5
–2.5
%
Leaving Window
VFB2 Ramping Up
VFB2 Ramping Down
–10.5
8
–8
10.5
%
tPGOOD
Power Good Blanking Time
Entering/Leaving Window
65
105
140
μs
RPGOOD
Power Good Pull-Down On-Resistance I = 10mA
8
12
30
Ω
VRUN
VRUN Voltage
Input High
Input Low
l
1
0.4
V
Pull-Down Resistance
4MΩ
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 LTC3618 is tested under pulsed load conditions such that
TJ ≈ TA. The LTC3618E is guaranteed to meet performance specications
over the 0°C to 85°C operating junction temperature range. Specications
over the –40°C to 125°C operating junction temperature range are
assured by design, characterization and correlation with statistical process
controls. The LTC3618I is guaranteed to meet specications over the
full –40°C to 125°C operating junction temperature range. Note that the
maximum ambient temperature consistent with these specications is
determined by specic operating conditions in conjunction with board
layout, the rated package thermal resistance and other environmental
factors. The junction temperature (TJ, in °C) is calculated from the ambient
temperature (TA, in °C) and power dissipation (PD, in watts) according to
the formula:
TJ = TA + (PD θJA)
where
θJA (in °C/W) is the package thermal impedance.
Note 3: This parameter is tested in a feedback loop which servos VFB1 to
the midpoint for the error amplier (VITH1 = 0.75V).
Note 4: External compensation on ITH pin.
Note 5: Tying the ITH pin to SVIN enables internal compensation and AVP
mode for the selected channel.
Note 6: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 7: See description of the TRACK/SS pin in the Pin Functions section.
Note 8: When sourcing current, the average output current is dened
as owing out of the SW pin. When sinking current, the average output
current is dened as owing into the SW pin. Sinking mode requires the
use of forced continuous mode.
Note 9: See description of the MODE pin in the Pin Functions section.
Note 10: Guaranteed by design and correlation to wafer level
measurements for QFN packages.
Note 11: 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 or permanently damage the
device.
The
l denotes the specications which apply over the full operating
junction temperature range, otherwise specications are at TA = 25°C (Note 2), SVIN = PVINx = 3.3V, RT = 178k, unless otherwise
specied.
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