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参数资料
| 型号： | LT3407EDD-2 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.6 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件页数： | 10/16页 |
| 文件大小： | 221K |
| 代理商： | LT3407EDD-2 |
LTC3407-2
3
34072fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Load Step
Burst Mode Operation
Pulse Skipping Mode
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 5LTC3407E-2 is guaranteed to meet specified performance
from 0
°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3407I-2 is guaranteed over the
full – 40
°C to 125°C operating temperature range.
Note 3: The LTC3407-2 is tested in a proprietary test mode that connects
VFB to the output of the error amplifier.
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: TJ = TA + (PD θJA).
Note 6: The DFN switch on-resistance is guaranteed by correlation to
wafer level measurements.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V, unless otherwise specified. (Note 2)
TA = 25°C unless other wise specified.
3407 G01
3407 G02
3407 G03
VIN = 3.6V
VOUT = 1.8V
ILOAD = 100mA
CIRCUIT OF FIGURE 1
VIN = 3.6V
VOUT = 1.8V
ILOAD = 20mA
CIRCUIT OF FIGURE 1
VIN = 3.6V
VOUT = 1.8V
ILOAD = 80mA TO 800mA
CIRCUIT OF FIGURE 1
SW
5V/DIV
VOUT
100mV/DIV
IL
200mA/DIV
SW
5V/DIV
VOUT
10mV/DIV
IL
200mA/DIV
VOUT
200mV/DIV
IL
500mA/DIV
ILOAD
500mA/DIV
2
μs/DIV
1
μs/DIV
20
μs/DIV
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN
Operating Voltage Range
●
2.5
5.5
V
IFB
Feedback Pin Input Current
●
30
nA
VFB
Feedback Voltage (Note 3)
0
°C ≤ TA ≤ 85°C
0.588
0.6
0.612
V
–40
°C ≤ TA ≤ 85°C
●
0.585
0.6
0.612
V
–40
°C ≤ TA ≤ 125°C (Note 2)
●
0.585
0.6
0.612
V
ΔVLINE REG
Reference Voltage Line Regulation
VIN = 2.5V to 5.5V (Note 3)
0.3
0.5
%/V
ΔVLOAD REG
Output Voltage Load Regulation
(Note 3)
0.5
%
IS
Input DC Supply Current
Active Mode
VFB1 = VFB2 = 0.5V
700
950
μA
Sleep Mode
VFB1 = VFB2 = 0.63V, MODE/SYNC = 3.6V
40
60
μA
Shutdown
RUN = 0V, VIN = 5.5V, MODE/SYNC = 0V
0.1
1
μA
fOSC
Oscillator Frequency
VFBX = 0.6V
●
1.8
2.25
2.7
MHz
fSYNC
Synchronization Frequency
2.25
MHz
ILIM
Peak Switch Current Limit
VIN = 3V, VFBX = 0.5V, Duty Cycle <35%
0.95
1.2
1.6
A
RDS(ON)
Top Switch On-Resistance
(Note 6)
0.35
0.45
Ω
Bottom Switch On-Resistance
(Note 6)
0.30
0.45
Ω
ISW(LKG)
Switch Leakage Current
VIN = 5V, VRUN = 0V, VFBX = 0V
0.01
1
μA
POR
Power-On Reset Threshold
VFBX Ramping Up, MODE/SYNC = 0V
8.5
%
VFBX Ramping Down, MODE/SYNC = 0V
–8.5
%
Power-On Reset On-Resistance
100
200
Ω
Power-On Reset Delay
262,144
Cycles
VRUN
RUN Threshold
●
0.3
1
1.5
V
IRUN
RUN Leakage Current
●
0.01
1
μA
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