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Q67006-A9309 데이터시트(PDF) 2 Page - Siemens Semiconductor Group

부품명 Q67006-A9309
상세설명  Dual Low-Drop Voltage Regulator
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제조업체  SIEMENS [Siemens Semiconductor Group]
홈페이지  http://www.siemens.com/
Logo SIEMENS - Siemens Semiconductor Group

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TLE 4470
Semiconductor Group
2
1998-11-01
TLE 4470 G type (P-DSO-20-6 package).
V
Q1 is compared to the voltage at pin VA,
which is proportional to the output voltage
V
Q2. A control amplifier drives the base of the
series PNP transistor via a buffer.
The main output voltage
V
Q2 is tracked to the accuracy of the stand by output.
For the TLE 4470 GS (P-DSO-14-4 package) the output voltage is fixed to 5 V.
To save energy e.g. in battery powered body electronic applications, the main regulator
can be switched off via the disable input, which causes the current consumption to drop
to 180
µA typical.
Two additional features of the TLE 4470 are an early warning comparator (can be used
e.g. to monitor the supply voltage
V
I) and reset generator with an adjustable reset delay
time. The TLE 4470 G (P-DSO-20-6 package) has in addition an adjustable reset
switching threshold. This feature is useful with microprocessors which guarantee a safe
operation down to voltages below the internally set reset threshold of 4.65 V typical.
Two functions are included in the reset generator, a power on reset and an under-voltage
reset. The power on reset feature is necessary for a defined start of the microprocessor
when switching on the application. The reset LOW signal is generated for a certain delay
time after the output voltage
V
Q1 of the regulator has surpassed the reset threshold. An
external delay capacitor sets the delay time. The under voltage reset circuit supervises
the stand-by output voltage. In case
V
Q1 falls below the reset switching threshold the
reset output is set LOW after a short reaction time. The reset LOW signal is generated
down to an output voltage
V
Q1 of 1 V.
Pin Configuration
(top view)
Figure 1
GND
GND
10
8
9
7
6
3
5
4
2
120
19
18
17
16
15
14
13
12
11
GND
DIS
D
GND
RQ
SI
AEP02151
SQ
GND
RADJ
GND
GND
ADJ2
GND
Q2
Q2
Q1
Ι
Ι
1
2
GND
7
6
3
5
4
2
114
13
12
11
10
9
8
GND
GND
DIS
SI
AEP02152
GND
D
Ι
GND
GND
RQ
SQ
Q2
Q1
P-DSO-20-6
P-DSO-14-4


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