參數(shù)資料
型號: DSPIC33FJ32MC802T-I/SO
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PDSO28
封裝: 7.50 MM HEIGHT, LEAD FREE, PLASTIC, SOIC-28
文件頁數(shù): 10/19頁
文件大?。?/td> 5827K
代理商: DSPIC33FJ32MC802T-I/SO
18
TYPICAL APPLICATION
In R
×5RE Series, a constant voltage can be obtained
without using Capacitors C1 and C2. However, when the
wire connected to VIN is long, use Capacitor C1. Output
noise can be reduced by using Capacitor C2.
Insert Capacitors C1 and C2 with the capacitance of
0.1F to 2.0F between Input/Output Pins and GND Pin
with minimum wiring.
The output voltage can be obtained by the follow-
ing formula :
VOUT=Vreg (1+R2/R1) + ISS R2
Since the quiescent current of R
×5RE Series is so
small that the resistances of R1 and R2 can be set as
large as several hundreds k
and therefore the sup-
ply current of “Voltage Boost Circuit” itself can be
reduced.
Furthermore, since R
×5RE Series are operated by
a constant voltage, the supply current of “Voltage
Boost Circuit” is not substantially affected by the
input voltage.
As shown in the circuit diagram, a dual power sup-
ply circuit can be constructed by using two R
×5RE
Series.
This circuit diagram shows a dual power supply
circuit with an output of 3V and an output of 5V.
When the minimum output current of IC2 is larger
than ISS of IC1, Resistor R is unnecessary. Diode D is
a protection diode for the case where VOUT2
becomes larger than VOUT1.
VOLTAGE BOOST CIRCUIT
DUAL POWER SUPPLY CIRCUIT
R
×5RE
C2
C1
VIN
GND
R
×5RE
SERIES
VOUT
VIN
+
C2
C1
VIN
GND
R
×5RE
SERIES
VOUT
VIN
R1
R2
ISS
+
C1
C2
VIN
GND
R
×5RE20A
R
×5RE30A
VOUT
VOUT1
5V
VOUT2
3V
VIN
C3
GND
VOUT
VIN
R
ISS
IC1
IC2
D
+
*1) Vreg : Set Output Voltage of R×5RE Series.
*1
APPLICATION CIRCUITS
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