參數(shù)資料
型號(hào)： LTC3801ES6#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 1 A SWITCHING CONTROLLER, 650 kHz SWITCHING FREQ-MAX, PDSO6
封裝： MO-193, PLASTIC, TSOT-23
文件頁(yè)數(shù)： 5/12頁(yè)
文件大?。?/td> 229K
代理商： LTC3801ES6#PBF
2
LTC3801/LTC3801B
sn3801 3801fs
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage Range
q
2.4
9.8
V
Input DC Supply Current
Typicals at VIN = 4.2V (Note 4)
Normal Operation
2.4V
≤ VIN ≤ 9.8V, VITH/RUN = 1.3V
195
300
A
SLEEP Mode
2.4V
≤ VIN ≤ 9.8V (LTC3801 Only)
16
30
A
Shutdown
2.4V
≤ VIN ≤ 9.8V, VITH/RUN = 0V (LTC3801)
6
15
A
2.4V
≤ VIN ≤ 9.8V, VITH/RUN = 0V (LTC3801B)
8
17
A
UVLO
VIN < UVLO Threshold
1
2
A
Undervoltage Lockout Threshold
VIN Rising
q
1.8
2.3
V
VIN Falling
q
1.7
2.2
V
Start-Up Current Source
VITH/RUN = 0V (LTC3801)
0.5
1
1.5
A
VITH/RUN = 0V (LTC3801B)
1.0
2
3.0
A
Shutdown Threshold (at ITH/RUN)
VITH/RUN Rising
q
0.3
0.6
0.95
V
Regulated Feedback Voltage
0
°C ≤ TA ≤ 85°C (Note 5)
0.788
0.800
0.812
V
–40
°C ≤ TA ≤ 85°C (Note 5)
q
0.780
0.800
0.812
V
Feedback Voltage Line Regulation
2.4V
≤ VIN ≤ 9.8V (Note 5)
0.05
mV/V
Feedback Voltage Load Regulation
ITH/RUN Sinking 5A (Note 5)
2
mV/
A
ITH/RUN Sourcing 5A (Note 5)
2
mV/
A
VFB Input Current
(Note 5)
2
10
nA
Overvoltage Protect Threshold
Measured at VFB
0.850
0.880
0.910
V
Overvoltage Protect Hysteresis
40
mV
Oscillator Frequency
Normal Operation
VFB = 0.8V
500
550
650
kHz
Output Short Circuit
VFB = 0V
210
kHz
Gate Drive Rise Time
CLOAD = 3000pF
40
ns
Gate Drive Fall Time
CLOAD = 3000pF
40
ns
Peak Current Sense Voltage
Duty Cycle < 40% (Note 6)
LTC3801
q
109
117
125
mV
LTC3801B
q
95
104
113
mV
Peak Current Sense Voltage in Burst Mode Operation
LTC3801 Only
26
mV
Default Soft-Start Time
0.6
ms
ORDER PART
NUMBER
(Note 1)
Input Supply Voltage (VIN)........................ – 0.3V to 10V
SENSE–, PGATE Voltages ............ – 0.3V to (VIN + 0.3V)
VFB, ITH/RUN Voltages ............................. –0.3V to 2.4V
PGATE Peak Output Current (<10
s) ........................ 1A
Operating Temperature Range (Note 2) .. – 40
°C to 85°C
Junction Temperature (Note 3) ............................ 150
°C
Storage Temperature Range ................. – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300
°C
LTC3801ES6
LTC3801BES6
TJMAX = 150°C, θJA = 230°C/W
The q indicates specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 4.2V unless otherwise noted. (Note 2)
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ITH/RUN 1
GND 2
VFB 3
6 PGATE
5 VIN
4 SENSE–
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
S6 PART MARKING
LTACR
LTAHN
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3801ES6/LTC3801BES6 are guaranteed to meet specifica-
tions 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.
Note 3: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formula:
TJ = TA + (PD θJA°C/W)
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: The LTC3801/LTC3801B are tested in a feedback loop that servos
VFB to the output of the error amplifier while maintaining ITH/RUN at the
midpoint of the current limit range.
Note 6: Peak current sense voltage is reduced dependent on duty cycle as
given in Figure 1.
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