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参数资料
| 型号： | LTC1728HS5-5 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封装： | PLASTIC, SOT-23, 5 PIN |
| 文件页数： | 11/16页 |
| 文件大小： | 197K |
| 代理商： | LTC1728HS5-5 |
4
LTC1727/LTC1728
17278fb
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VRT3
Reset Threshold VCC3
VCC3 Input Threshold
●
3.036
3.086
3.135
V
VRT18
Reset Threshold VCC18
VCC18 Input Threshold
●
1.656
1.683
1.710
V
VRTA
Reset Threshold VCCA
VCCA Input Threshold
●
0.985
1.000
1.015
V
VCCOP
VCC3, VCC18 Operating Voltage
RST in Correct Logic State
●
17
V
IVCC3
VCC3 Supply Current
VCC18 > VCC3
●
12
A
VCC18 < VCC3, VCC3 = 3.3V (Note 4)
●
10
20
A
IVCC18
VCC18 Supply Current
VCC18 < VCC3, VCC18 = 1.8V (Note 4)
●
12
A
IVCCA
VCCA Input Current
VCCA = 1V
●
–15
0
15
nA
tRST
Reset Pulse Width
RST Low (Note 5)
●
140
200
280
ms
tUV
VCC Undervoltage Detect to RST
VCC18, VCC3 or VCCA Less Than Reset (Note 5)
110
s
Threshold VRT by More Than 1%
VOL
Output Voltage Low, RST
ISINK = 2.5mA, VCC3 = 3.3V, VCC18 = 0V
●
0.15
0.4
V
ISINK = 100A, VCC3 = 1V, VCC18 = 0V
●
0.05
0.3
V
ISINK = 100A, VCC3 = 0V, VCC18 = 1V
●
0.05
0.3
V
ISINK = 100A, VCC3 = 1V, VCC18 = 1V
●
0.05
0.3
V
VOH
Output Voltage High, RST
ISOURCE = 1A (Note 6)
● VCC3 – 1
V
LTC1728-3.3 The
● denotes specifications which apply over the full operating temperature range, otherwise specifications are at
TA = 25°C. VCC3 = 3.3V, VCC18 = 1.8V, VCCA = VCC3 unless otherwise noted.
ELECTRICAL CHARACTERISTICS
Note 4: Both VCC3 and VCC5/VCC25/VCC18 can act as the supply depending
on which pin has the greatest potential.
Note 5: Measured from when input passes through the input threshold
(VRTX) until RST or COMPX passes through 1.5V.
Note 6: The output pins RST and COMPX have internal pull-ups to VCC3 of
typically 6
A. However, external pull-up resistors may be used when faster
rise times are required or for VOH voltages greater than VCC3.
Note 7: The VCC5 reset override voltage is valid for an operating range less
than approximately 4.15V. Above this point the override is turned off and
the VCC5 pin functions normally.
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: All voltage values are with respect to GND.
Note 3: The LTC1727E/LTC1728E are guaranteed to meet specified
performance from 0
°C to 70°C and are designed, characterized and
assured to meet the extended temperature limits of – 40
°C to 85°C
but are not tested at these temperatures.
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