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参数资料
| 型号： | DC1029A |
| 厂商： | Linear Technology |
| 文件页数： | 5/32页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR LTC2928 |
| 设计资源： | DC1029A Design File DC1029A Schematic |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电源监控器/跟踪器/序列发生器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | LTC2928 |
| 主要属性： | 4 通道电源定序器 |
| 已供物品： | 板 |
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LTC2928
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C, V CC = 3.3V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
External Voltage Reference Pin: REF
V REF
Reference Voltage Output
100% Sequence Threshold
67% Sequence Threshold
33% Sequence Threshold
10% Sequence Threshold
I REF = 0.2mA, –1mA, C REF = ≤ 1000pF
VSEL = V CC
VSEL = V CC
VSEL = V CC
VSEL = V CC
●
●
●
●
●
1.172
1.172
0.780
0.386
0.109
1.189
1.189
0.793
0.396
0.119
1.205
1.205
0.806
0.406
0.129
V
V
V
V
V
Over Voltage Indication Pin: OV
V OV(OL)
V OV(OH)
OV Voltage Output Low
OV Voltage Output High (Note 7)
I OV = 2.5mA
I OV = –1 μ A
●
● V CC – 1
0.15
0.3
V
V
t OV
OV Indication Time (Note 8)
OV Low Time Upon Cleared
OV Event, C RTMR = 1500pF
●
5
6
7
ms
Over Voltage Adjust Pin: OVA
V OVA(TH)
Over Voltage Threshold at Comparator
Inputs (Note 9)
V OVA = GND
V OVA Floating
V OVA = V CC = 3.3V
●
●
●
0.546
0.650
1.042
0.556
0.660
1.072
0.566
0.670
1.102
V
V
V
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 currents into pins are positive, all voltages are referenced to
GND unless otherwise noted.
Note 3: Internal circuits regulate the EN output voltage to V EN . Driving this
pin to voltages beyond V EN may damage the part.
Note 4: The comparator outputs have internal pull-ups to V CC of typically
–10 μ A. However, external pull-up resistors may be used when faster rise
times are required or for V OH voltages greater than V CC .
Note 5: The CAS high time after an ON edge is stretched by the ON pin
propagation delay (20 μ s typical).
Note 6: The DONE pull-down current is present when DONE is high to
facilitate cascading multiple LTC2928s.
Note 7: The RST and OV outputs have an internal pullup to V CC of typically
–10 μ A. However, external pull-up resistors may be used when faster rise
times are required or for V OH voltages greater than V CC .
Note 8: If the termination of under and overvoltage events occur within
one nominal t RTMR period, the variation in t RTMR and/or t OV may be ±15%.
Note 9: Use a resistor from OVA to ground or V CC to configure overvoltage
thresholds within the max/min ranges shown. See Applications
Information for details.
2928f
5
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