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参数资料
| 型号： | MC34704BEP |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 4/54页 |
| 文件大小： | 0K |
| 描述： | IC POWER MANAGEMENT 56-QFN |
| 标准包装： | 260 |
| 应用： | 处理器 |
| 电流 - 电源： | 86mA |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 56-QFN |
| 供应商设备封装： | 56-QFN-EP（7x7） |
| 包装： | 管件 |
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PIN CONNECTIONS
PIN CONNECTIONS
BT5U
56 55 54 53 52 51 50 49 48 47 46 45 44 43
1 42
BT2U
BT5U
56 55 54 53 52 51 50 49 48 47 46 45 44 43
1 42
BT2U
BT4D
2
41
ONOFF
BT4D
2
41
ONOFF
PVIN4
SW4D
VOUT4
SW4U
BT4U
3
4
5
6
7
57
Exposed Pad
PGND
40
39
38
37
36
LION
VDDI
VIN
AGND
VOUT6
PVIN4
SW4D
VOUT4
SW4U
BT4U
3
4
5
6
7
57
Exposed Pad
PGND
40
39
38
37
36
LION
VDDI
VIN
AGND
PGND5
FB4
COMP4
BT3
PVIN3
SW3
VOUT3
FB3
8
9
10
11
12
13
14
1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 24 25 26 2 7 2 8
35
34
33
32
31
30
29
SW6
BT6
FB6
VOUT7
DRV7
FB7
VREF7
FB4
COMP4
BT3
PVIN3
SW3
VOUT3
FB3
8
9
10
11
12
13
14
1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 23 24 25 26 2 7 2 8
35
34
33
32
31
30
29
PGND4
NC4
AGND3
PGND2
NC3
AGND1
NC2
34704A
34704B
Figure 3. 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
Connect a 1.0 μ F capacitor between this pin and SW5U pin to
bootstrap capacitor input
pin
enhance the gate of the Switch Power MOSFET.
2
A/B
BT4D
Passive
REG4 Buck Stage
Connect a 0.01 μ F capacitor between this pin and SW4D pin to
bootstrap capacitor input
pin
enhance the gate of the Switch Power MOSFET.
3
A/B
PVIN4
Power
REG4 power supply input
This is the connection to the drain of the high side switch FET.
voltage
Input decoupling /filtering is required for proper REG4 operation.
Use a 10uf decoupling capacitor for better performance.
4
A/B
SW4D
Input/Output
REG4 Buck Stage
The inductor is connected between this pin and the SW4U pin.
switching node
5
A/B
VOUT4
Output
REG4 regulated output
Connect this pin to the load and to the output filter as close to
voltage pin
the pin as possible.
6
A/B
SW4U
Input/Output
REG4 Boost Stage
The inductor is connected between this pin and the SW4D pin.
switching node
7
A/B
BT4U
Passive
REG4 Boost Stage
Connect a 0.01 μ F capacitor between this pin and SW4U pin to
bootstrap capacitor input
pin
enhance the gate of the Switch Power MOSFET.
8
A/B
FB4
Input
REG4 voltage feedback
Connect the feedback resistor divider to this pin.
input for voltage
regulation/programming
9
A/B
COMP4
Passive
REG4 compensation
REG4 compensation network connection.
network connection
10
A/B
BT3
Passive
REG3 bootstrap capacitor
Connect a 0.01 μ F capacitor between this pin and SW3 pin to
input pin
enhance the gate of the Switch Power MOSFET.
34704
Analog Integrated Circuit Device Data
4
Freescale Semiconductor
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