LTC3727EG 查看數據表（PDF） - Linear Technology
零件编号
产品描述 (功能)
生产厂家
LTC3727EG Datasheet PDF : 32 Pages
| |||
TYPICAL PERFOR A CE CHARACTERISTICS
LTC3727/LTC3727-1
Current Sense Pin Input Current
vs Temperature
35
VOUT = 5V
33
31
29
27
EXTVCC Switch Resistance
vs Temperature
10
8
6
4
2
Oscillator Frequency
vs Temperature
700
600
VPLLFLTR = 5V
500
VPLLFLTR = 1.2V
400
300
VPLLFLTR = 0V
200
100
25
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3727 G22
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3727 G23
0
– 50 – 25
0 25 50 75
TEMPERATURE (°C)
100 125
3727 G24
Undervoltage Lockout
vs Temperature
3.50
3.45
3.40
3.35
3.30
3.25
3.20
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3727 G25
Shutdown Latch Thresholds
vs Temperature
4.5
4.0
LATCH ARMING
3.5
3.0
LATCHOFF
THRESHOLD
2.5
2.0
1.5
1.0
0.5
LTC3727 ONLY
0
–50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
3727 G26
PI FU CTIO S
RUN/SS1, RUN/SS2 (Pins 1, 15): Combination of soft-
start, run control inputs and short-circuit detection timers
(LTC3727 only). A capacitor to ground at each of these
pins sets the ramp time to full output current. Forcing
either of these pins back below 1.0V causes the IC to shut
down the circuitry required for that particular controller.
Latchoff overcurrent protection is also invoked via this pin
as described in the Applications Information section
(LTC3727 only).
SENSE1+, SENSE2+ (Pins 2, 14): The (+) Input to the
Differential Current Comparators. The Ith pin voltage and
controlled offsets between the SENSE– and SENSE+ pins
in conjunction with RSENSE set the current trip threshold.
SENSE1–, SENSE2– (Pins 3, 13): The (–) Input to the
Differential Current Comparators.
VOSENSE1, VOSENSE2 (Pins 4, 12): Receives the remotely-
sensed feedback voltage for each controller from an
external resistive divider across the output.
3727f
7
Share Link: 