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MC33680FTB bảng dữ liệu(PDF) 4 Page - ON Semiconductor

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Giải thích chi tiết về linh kiện  Dual DC-DC Regulator for Electronic Organizer
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nhà sản xuất  ONSEMI [ON Semiconductor]
Trang chủ  http://www.onsemi.com
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MC33680
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4
PIN FUNCTION DESCRIPTION
Pin
No.
Function
Type/Direction
Description
1
VMAINFB
Analog / Input
Feedback pin for VMAIN
2
VBAT
Power
Main battery supply
3
VBAT
Power
Main battery supply
4
VDD
Analog / Output
Connect to decoupling capacitor for internal logic supply
5
PDELAY
Analog / Input
Capacitor connection for defining Power–On signal delay
6
VREF
Analog / Output
Bandgap Reference output voltage. Nominal voltage is 1.25V
7
AGND
Analog Ground
8
IREF
Analog / Input
Resistor connection for defining internal current bias and PDELAY current
9
LOWBATSEN
Analog / Input
Resistive network connection for defining low battery detect threshold
10
DGND
Digital Ground
11
PORB
CMOS / Output
Active LOW Power–On reset signal
12
LOWBATB
CMOS / Output
Active LOW low battery detect output
13
LIBATON
CMOS / Input
microprocessor control signal for Lithium battery backup switch, the switch is
ON when LIBATON=HIGH and LIBATCL=HIGH
14
LIBATCL
CMOS / Input
microprocessor control signal for Lithium battery backup switch, if it is HIGH,
the switch is controlled by LIBATON, otherwise, controlled by internal logic
15
DGND
Digital Ground
16
NC
no connection
17
VAUXEN
CMOS / Input
VAUX enable, Active high
18
VAUXFBP
Analog / Input
Feedback pin for VAUX
19
NC
no connection
20
VAUXFBN
Analog / Input
Feedback pin for VAUX
21
VAUXBDV
Power
VAUX BJT base drive circuit power supply
22
VAUXCHG
Analog / Output
test pin
23
VAUXBASE
Analog / Output
test pin
24
NC
no connection
25
VAUXSW
Analog / Output
Collector output of the VAUX power BJT
26
VAUXEMR
Analog / Output
Emitter output of the VAUX power BJT
27
LIBATIN
Analog / Input
Lithium battery input for backup purposes
28
LIBATOUT
Analog / Output
Lithium battery output
29
NC
no connection
30
VMAINGND
Power Ground
Ground for VMAIN low side switch
31
VMAINSW
Analog / Input
VMAIN inductor connection
32
VMAIN
Analog / Output
VMAIN output


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