參數(shù)資料
型號： PC34704BEP
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 電源管理
英文描述： 8-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC56
封裝： 7 X 7 MM, 1 MM HEIGHT, 0.40 MM PITCH, ROHS COMPLIANT, QFN-56
文件頁數(shù)： 47/50頁
文件大?。?/td> 2010K
代理商： PC34704BEP
Analog Integrated Circuit Device Data
6
Freescale Semiconductor
34704
PIN CONNECTIONS
31
A
B
DRV7
NC3
Output
-
REG7 external Power
MOSFET gate drive
-34704A: REG7 external Power MOSFET gate drive.
-34704B: Pin 31 is not connected
32
A
B
VOUT7
PGND2
Output
-
REG7 output voltage
return pin.
-34704A: This is the discharge path of REG7 output voltage.
-34704B: Pin 32 is connected to GND
33
A
B
FB6
AGND3
Input
-
REG6 voltage feedback
input for voltage
regulation/programming
-34704A: Connect the feedback resistor divider to this pin.
-34704B: Pin 33 is connected to GND
34
A
B
BT6
NC4
Passive
-
REG6 bootstrap capacitor
input pin.
-34704A: Connect a 0.01
F capacitor between this pin and
SW6 pin to enhance the gate of the Synchronous Power
MOSFET.
-34704B: Pin 33 is not connected
35
A
B
SW6
PGND4
Output
-
REG6 switching node
-34704A: The inductor is connected between this pin and the
VIN pin.
-34704B: Pin 34 is connected to GND
36
A
B
VOUT6
PGND5
Output
-
REG6 regulated output
voltage pin
-34704A: Connect this pin directly to the load directly and to the
output filter as close to the pin as possible.
-34704B: Pin 32 is connected to GND
37
A/B
AGND
Ground
Analog ground of the IC
Analog ground of the IC.
38
A/B
VIN
Power
Battery voltage
connection
Input decoupling /filtering is required for the device to operate
properly.
39
A/B
VDDI
Output
Internal supply voltage
Connect a 1
F low ESR decoupling filter capacitor between this
pin and GND.
40
A/B
LION
Input
Battery Detection
Pull this pin high to VIN to indicate a connection to a Li-Ion
battery
41
A/B
ONOFF
Input
Dual function IC turn On/
Off
This is a hardware enable/disable for the 34704A. It can be
connected to a mechanical switch to turn the power On or Off.
42
A/B
BT2U
Passive
REG2 Boost Stage
bootstrap capacitor input
pin
Connect a 1
F capacitor between this pin and SW2U pin to
enhance the gate of the Switch Power MOSFET.
43
A/B
COMP2
Passive
REG2 compensation
network connection
REG2 compensation network connection.
44
A/B
FB2
Input
REG2 voltage feedback
input for voltage
regulation/programming
Connect the feedback resistor divider to this pin.
45
A/B
BT2D
Passive
REG2 Buck Stage
bootstrap capacitor input
pin
Connect a 1
F capacitor between this pin and SW2D pin to
enhance the gate of the Switch Power MOSFET.
46
A/B
PVIN2
Power
REG2 power supply input
voltage
This is the connection to the drain of the high side switch FET.
Input decoupling /filtering is required for proper REG2 operation.
47
A/B
SW2D
Input/Output
REG2 Buck Stage
switching node
The inductor is connected between this pin and the SW2U pin.
48
A/B
VOUT2
Output
REG2 regulated output
voltage pin
Connect this pin to the load and to the output filter as close to
the pin as possible.
49
A/B
SW2U
Input/Output
REG2 Boost Stage
switching node
The inductor is connected between this pin and the SW2D pin.
Table 2. 34704 Pin Definitions (continued)
A functional description of each pin can be found in the Functional Pin Description section beginning on page 17.
Pin Number Device Pin Name Pin Function
Formal Name
Definition
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