參數(shù)資料
型號(hào)： 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)： 34/50頁
文件大?。?/td> 2010K
代理商： PC34704BEP
Analog Integrated Circuit Device Data
4
Freescale Semiconductor
34704
PIN CONNECTIONS
PIN CONNECTIONS
Figure 2. 34704 Pin Connections
Table 2. 34704 Pin Definitions
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
1
A/B
BT5U
Passive
REG5 Boost Stage
bootstrap capacitor input
pin
Connect a 1
F capacitor between this pin and SW5U pin to
enhance the gate of the Switch Power MOSFET.
2
A/B
BT4D
Passive
REG4 Buck Stage
bootstrap capacitor input
pin
Connect a 0.01
F capacitor between this pin and SW4D pin to
enhance the gate of the Switch Power MOSFET.
3
A/B
PVIN4
Power
REG4 power supply input
voltage
This is the connection to the drain of the high side switch FET.
Input decoupling /filtering is required for proper REG4 operation.
4
A/B
SW4D
Input/Output
REG4 Buck Stage
switching node
The inductor is connected between this pin and the SW4U pin.
5
A/B
VOUT4
Output
REG4 regulated output
voltage pin
Connect this pin to the load and to the output filter as close to
the pin as possible.
6
A/B
SW4U
Input/Output
REG4 Boost Stage
switching node
The inductor is connected between this pin and the SW4D pin.
7
A/B
BT4U
Passive
REG4 Boost Stage
bootstrap capacitor input
pin
Connect a 0.01
F capacitor between this pin and SW4U pin to
enhance the gate of the Switch Power MOSFET.
8
A/B
FB4
Input
REG4 voltage feedback
input for voltage
regulation/programming
Connect the feedback resistor divider to this pin.
9
A/B
COMP4
Passive
REG4 compensation
network connection
REG4 compensation network connection.
10
A/B
BT3
Passive
REG3 bootstrap capacitor
input pin
Connect a 0.01
F capacitor between this pin and SW3 pin to
enhance the gate of the Switch Power MOSFET.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 16 17 18 19 20 21 22 23 24 25 26 27 28
42
41
40
39
38
37
36
35
34
33
32
31
30
29
56 55 54 53 52 51 50 49 48 47 46 45 44 43
57
Exposed Pad
PGND
BT5U
BT4D
PVIN4
SW4D
VOUT4
SW4U
BT4U
FB4
COMP4
BT3
PVIN3
SW3
VOUT3
FB3
SS
FR
E
Q
FB
8
BT
8
VOUT
8
SW8
SW1
VG
VOUT
1
BT
1
SC
L
SD
A
RST
COMP7
BT2U
ONOFF
LION
VDDI
VIN
AGND
VOUT6
SW6
BT6
FB6
VOUT7
DRV7
FB7
VREF7
COMP5
FB
5
BT
5
D
PV
IN
5
SW5
D
VOUT
5
SW5
U
SW2
U
VOUT
2
SW2
D
PV
IN
2
BT
2
D
FB
2
COMP2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 16 17 18 19 20 21 22 23 24 25 26 27 28
42
41
40
39
38
37
36
35
34
33
32
31
30
29
56 55 54 53 52 51 50 49 48 47 46 45 44 43
57
Exposed Pad
PGND
BT5U
BT4D
PVIN4
SW4D
VOUT4
SW4U
BT4U
FB4
COMP4
BT3
PVIN3
SW3
VOUT3
FB3
SS
FR
E
Q
FB
8
BT
8
VOUT
8
SW8
SW1
VG
NC0
BT
1
SC
L
SD
A
RST
NC1
BT2U
ONOFF
LION
VDDI
VIN
AGND
PGND5
PGND4
NC4
AGND3
PGND2
NC3
AGND1
NC2
COMP5
FB
5
BT
5
D
PV
IN
5
SW5
D
VOU
T
5
SW5
U
SW2
U
VOU
T
2
SW2
D
PV
IN
2
BT
2
D
FB
2
COMP2
34704A
34704B
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