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參數(shù)資料
| 型號： | LTC3411IDD#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING REGULATOR, 4000 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, PLASTIC, DFN-10 |
| 文件頁數(shù)： | 18/24頁 |
| 文件大?。?/td> | 247K |
| 代理商： | LTC3411IDD#TR |
LTC3411
3
3411fb
ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VIN = 3.3V, RT = 324k unless otherwise specied. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN
Operating Voltage Range
2.625
5.5
V
IFB
Feedback Pin Input Current
±0.1
μA
VFB
Feedback Voltage
(Note 3)
l
0.784
0.8
0.816
V
ΔVLINEREG
Reference Voltage Line Regulation
VIN = 2.7V to 5V
0.04
0.2
%/V
ΔVLOADREG
Output Voltage Load Regulation
ITH = 0.36, (Note 3)
ITH = 0.84, (Note 3)
l
0.02
–0.02
0.2
–0.2
%
gm(EA)
Error Amplier Transconductance
ITH Pin Load = ±5μA (Note 3)
800
μS
IS
Input DC Supply Current (Note 4)
Active Mode
Sleep Mode
Shutdown
VFB = 0.75V, SYNC/MODE = 3.3V
VSYNC/MODE = 3.3V, VFB = 1V
VSHDN/RT = 3.3V
240
62
0.1
350
100
1
μA
VSHDN/RT
Shutdown Threshold High
Active Oscillator Resistor
VIN – 0.6
324k
VIN – 0.4
1M
V
Ω
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
1.6
2
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
μA
VUVLO
Undervoltage Lockout Threshold
VIN Ramping Down
2.375
2.5
2.625
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
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 LTC3411E is guaranteed to meet specied performance from
0°C to 85°C. Specications over the –40°C to 85°C operating termperature
range are assured by design, characterization and correlation with
statistical process controls. The LTC3411I is guaranteed to meet specied
performance over the full –40°C to 125°C operating temperature range.
Note 3: The LTC3411 is tested in a feedback loop which servos VFB to the
midpoint for the error amplier (VITH = 0.6V).
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5: TJ is calculated from the ambient TA and power dissipation PD
according to the following formula:
LTC3411DD: TJ = TA + (PD 43°C/W)
LTC3411MS: TJ = TA + (PD 120°C/W)
Note 6: Switch on-resistance is guaranteed by correlation to wafer level
measurements.
Note 7: 4MHz operation is guaranteed by design but not production tested
and is subject to duty cycle limitations (see Applications Information).
Note 8: 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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