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参数资料
| 型号： | LTC2919IMS-2.5#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC MONITOR PREC 2.5V 10-MSOP |
| 标准包装： | 50 |
| 类型： | 多压监控器 |
| 监视电压数目： | 3 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 2.213V，可调，可调 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
LTC2919
TYPICAL PERFOR A CE CHARACTERISTICS
T A = 25°C unless otherwise noted.
OUT1, OUT2, RST V OL vs Output
Sink Current
I SEL vs Temperature
I SEL vs Temperature
1.0
0.8
V CC = 3V
NO PULL-UP R
T A = 150°C
–10
–12
SEL = GND
22
20
SEL = V CC
–14
18
0.6
T A = 125°C
T A = 25°C
–16
16
0.4
0.2
T A = –40°C
–18
–20
14
12
0
0
5
10
15
20
25
30
–22
–50 –25
0
25
50
75
100 125 150
10
–50 –25
0
25
50
75
100 125 150
OUTPUT SINK CURRENT (mA)
2919 G16
PI FU CTIO S (MSOP/DFN Package)
TEMPERATURE (°C)
2919 G17
TEMPERATURE (°C)
2919 G18
SEL (Pin 1): Input Polarity Select Three-State Input. Con-
nect to V CC , GND or leave unconnected in open state to
select one of three possible input polarity combinations
(refer to Table 1).
V CC (Pin 2): Power Supply. Bypass this pin to ground with
a 0.1μF (or greater) capacitor. Operates as a direct supply
input for voltages up to 6V. Operates as a shunt regulator
for supply voltages greater than 6V and should have a
resistor between this pin and the supply to limit V CC input
current to no greater than 10mA. When used without a
current-limiting resistor, pin voltage must not exceed 6V.
UVLO options allow V CC to be used as an accurate third
?xed -10% UV supply monitor.
OUT1 (Pin 3): Open-Drain Logic Output 1. Asserts low
when positive polarity ADJ1 voltage is below threshold or
negative polarity ADJ1 voltage is above threshold. Requires
an external pull-up resistor and may be pulled above V CC .
OUT2 (Pin 4): Open-Drain Logic Output 2. Asserts low
when positive polarity ADJ2 voltage is below threshold
or negative polarity ADJ2 voltage is above threshold.
Requires an external pull-up resistor and may be pulled
above V CC .
RST (Pin 5): Open-Drain Inverted Reset Logic Output.
Asserts low when any positive polarity input voltage is
below threshold or any negative polarity input voltage is
above threshold or V CC is below UVLO threshold. Held
low for a timeout period after all voltage inputs are valid.
Requires an external pull-up resistor and may be pulled
above V CC .
GND (Pin 6): Device Ground.
REF (Pin 7): Buffered Reference Output. 1V nominal
reference used for the offset of negative-monitoring ap-
plications. The buffered reference can source and sink
up to 1mA. The reference can drive a capacitive load of
up to 1000pF. Larger capacitance may degrade transient
performance. This pin does not require a bypass capacitor,
nor is one recommended. Leave open if unused.
TMR (Pin 8): Reset Timeout Control. Attach an external
capacitor (C TMR ) to GND to set a reset timeout period
of 9ms/nF. A low leakage ceramic capacitor is recom-
mended for timer accuracy. Capacitors larger than 1μF
(9 second timeout) are not recommended. See Applica-
tions Information for further details. Leaving this pin open
generates a minimum timeout of approximately 400μs. A
2.2nF capacitor will generate a 20ms timeout. Tying this
pin to ground will enable the internal 200ms timeout. Ty-
ing this pin to V CC will disable the reset timer and put the
part in comparator mode. Signals from the comparator
outputs will then go directly to RST .
ADJ2 (Pin 9): Adjustable Voltage Input 2. Input to volt-
age monitor comparator 2 (0.5V nominal threshold). The
polarity of the input is selected by the state of the SEL
pin (refer to Table 1). Tie to GND if unused (with SEL =
GND or Open).
2919f
6
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