参数资料
型号: LTC2913CDD-2#PBF
厂商: Linear Technology
文件页数: 10/12页
文件大小: 0K
描述: IC VOLT MONITOR DUAL 10-DFN
标准包装: 121
类型: 多压监控器
监视电压数目: 2
输出: 开路漏极或开路集电极
复位: 低有效
复位超时: 可调节/可选择
电压 - 阀值: 可调节/可选择
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 10-WFDFN 裸露焊盘
供应商设备封装: 10-DFN(3x3)
包装: 管件
产品目录页面: 1343 (CN2011-ZH PDF)
LTC2913
APPLICATIONS INFORMATION
where R PD is the on-resistance of the internal pull-down
transistor, typically 50 Ω at V CC > 1V and at room tem-
perature (25°C). C LOAD is the external load capacitance
on the pin. Assuming a 150pF load capacitance, the fall
time is 16.5ns.
The rise time on the UV and OV pins is limited by a 400k
pull-up resistance to V CC . A similar formula estimates the
output rise time (10% to 90%) at the UV and OV pins:
t RISE ≈ 2.2 ? R PU ? C LOAD
where R PU is the pull-up resistance.
OV Latch (LTC2913-1)
With the LATCH pin held low, the OV pin latches low when
an OV condition is detected. The latch is cleared by raising
the LATCH pin high. If an OV condition clears while LATCH
TYPICAL APPLICATIONS
Dual UV/OV Supply Monitor, 10% Tolerance, 5V, 3.3V
is held high, the latch is bypassed and the OV pin behaves
the same as the UV pin with a similar timeout period at the
output. If LATCH is pulled low while the timeout period is
active, the OV pin latches as before.
Disable (LTC2913-2)
The LTC2913-2 allows disabling the UV and OV outputs
via the DIS pin. Pulling DIS high will force both outputs
to remain weakly pulled high, regardless of any faults
that occur on the inputs. However, if a UVLO condition
occurs, UV asserts and pulls low, but the timeout function
is bypassed. UV pulls high as soon as the UVLO condition
is cleared.
DIS has a weak 2μA (typical) internal pull-down current
guaranteeing normal operation with the pin left open.
Supply Monitor Powered from 12V, 10% Tolerance, 12V, 5V
POWER
SUPPLIES
5V
3.3V
C BYP
12V
POWER
SUPPLIES 5V
R Z
10k
0.1 μ F
C BYP
0.1 μ F
4
OV
UV
LATCH
4
R C1
44.2k
R B1
1k
R A1
4.53k
1
R C2
27.4k 2
3
R B2
1k
R A2
4.53k
10
V CC
VH1
LTC2913-1
VL1
VH2
VL2
GND TMR
5 9
6
7
8
C TMR
22nF
SYSTEM
2913 TA02
TIMEOUT = 200ms
R C1
115k
R B1
1k
R A1
4.53k
1
R C2
44.2k 2
3
R B2
1k
R A2
4.53k
10
V CC
VH1 TMR
LTC2913-2
VL1 OV
VH2 UV
VL2 DIS
GND
5
9
6
7
8
SYSTEM
2913 TA03
2913fb
10
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