参数资料
| 型号： | NCV7361ADR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 15/27页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5V 50MA 8-SOIC |
| 产品变化通告： | Product Discontinuation 27/Jan/2012 |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 5V |
| 输入电压： | 5.25 V ~ 18 V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 50mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 带卷 (TR) |
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NCV7361A
RxD Output
The received BUS signal will be output to the 5.0 V RxD
pin:
BUS < V thr_cnt – 0.5 * V thr_hys → RxD = low
BUS > V thr_cnt + 0.5 * V thr_hys → RxD = high
This output is a push ? pull driver between V OUT and
GND with an output current capability of 1.0 mA.
16
14
12
10
8
6
NCV7361A
V OUT
RxD
MCU
4
2
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0 4.5
V OUT (V)
Figure 22. Output Current of Reset Output vs.
V OUT Voltage
Figure 20. RxD Output Circuitry
Linear Regulator
The NCV7361A has an integrated low dropout linear
regulator with a P ? Channel MOSFET output driver whose
output is 5.0 V " 2% at v 50 mA and 5.5 V v V SUP v
18 V. Figure 21 shows typical current limit based on the
output voltage.
120
100
80
60
40
20
Initialization
The initialization is started if V SUP is switched on. This
is independent of the EN pin.
V SUP Power ON
The NCV7361A starts in the normal mode when V SUP is
applied [>3.15 V (typical)]. The internal circuitry on V OUT
as well as the internal regulator starts the initialization with
power ? on ? reset. The voltage regulator is switched on.
If V OUT > V POR the bus ? interface will be activated.
If V OUT is higher than V Res , the reset time t Res = 100 ms
is started. After t Res the RESET output switches from low
to high (Figure 22).
The initialization procedure at power on is started
independent from the EN state. The regulator can only be
turned off with a high level followed by a low level on the
EN pin.
Mode Input EN
The NCV7361A is switched into the sleep mode when
EN goes from high to low. The normal mode will be kept
as long as EN = high.
0
0
1
2
3
V OUT (V)
4
5
6
The regulator can be turned off by switching EN high to
low independent of the state of the bus ? transceiver.
The EN input is internally pulled down to guarantee a
low with no connection. In the high state, the pulldown
Figure 21. Characteristic of Current Limit
vs. Output Voltage
RESET
RESET switches from low to high if V SUP is switched on
and V OUT > V RES for t Res .
If V OUT drops below V RES , the RESET output goes from
high to low after t rr . Short transients will be filtered.
The RESET output driver is driven from V OUT to
guarantee proper operation.
current will be switched off to reduce the quiescent current.
The maximum input voltage is V SUP . The threshold is
typical 2.1 V and therefore CMOS levels can be used as
input signals. Figure 23 shows the internal circuitry of the
EN pin.
The EN input is internally pulled down to secure that if
this pin is not connected a low level will be generated. It
will be used two different pull down current sources for
high and low level to minimize the sleep mode current.
http://onsemi.com
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