參數(shù)資料
型號(hào): NCV8184DTRK
廠商: ON SEMICONDUCTOR
元件分類: 基準(zhǔn)電壓源/電流源
英文描述: Micropower 70 mA Low Dropout Tracking Regulator/Line Driver
中文描述: ADJUSTABLE POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PSSO4
封裝: DPAK-5
文件頁數(shù): 7/14頁
文件大?。?/td> 143K
代理商: NCV8184DTRK
NCV8184
http://onsemi.com
7
APPLICATION NOTES
V
OUT
Short to Battery
The NCV8184 will survive a short to battery when hooked
up the conventional way as shown in Figure 19. No damage
to the part will occur. The part also endures a short to battery
when powered by an isolated supply at a lower voltage as in
Figure 20. In this case the NCV8184 supply input voltage is
set at 7 V when a short to battery (14 V typical) occurs on
V
OUT
which normally runs at 5 V. The current into the
device (ammeter in Figure 20) will draw additional current
as displayed in Figure 21.
V
OUT
GND
GND
Adj
V
IN
GND
GND
V
REF
/
ENABLE
V
OUT
5.0 V
70 mA
C1*
1.0 F
Automotive Battery
typically 14 V
Short to battery
N
Figure 19.
C2**
10 F
V
OUT
GND
GND
Adj
V
IN
GND
GND
V
REF
/
ENABLE
V
OUT
C1*
1.0 F
N
Figure 20.
C2**
10 F
C3***
10 nF
V
OUT
= V
REF
5.0 V
+
Loads
B+
5.0 V
70 mA
Automotive Battery
typically 14 V
Short to battery
V
OUT
= V
REF
5.0 V
+
Loads
B+
C3***
10 nF
A
7 V
** C2 is required for stability.
*** C3 is recommended for EMC susceptibility.
* C1 is required if the regulator is far from the power source filter.
+
+
Figure 21. V
OUT
Short to Battery
18
16
14
12
10
6
4
2
0
6
5
10
15
20
25
V
OUT
VOLTAGE (V)
C
8
7 8 9
11121314
16171819
21222324
26
Switched Application
The NCV8184 has been designed for use in systems where
the reference voltage on the V
REF
/ENABLE pin is
continuously on. Typically, the current into the
V
REF
/ENABLE pin will be less than 1.0 A when the
voltage on the V
IN
pin (usually the ignition line) has been
switched out (V
IN
can be at high impedance or at ground.)
Reference Figure 22.
V
OUT
GND
GND
Adj
V
IN
GND
GND
V
REF
/
ENABLE
V
OUT
V
REF
5.0 V
V
BAT
C1
1.0 F
Ignition
Switch
< 1.0 A
N
Figure 22.
C2
10 F
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