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参数资料
| 型号： | MC34704BEPR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 6/54页 |
| 文件大小： | 0K |
| 描述： | IC PWR MNGMT DC-DC MULT 56-QFN |
| 特色产品： | MC34704 Multi-channel Power Management IC (PMIC) |
| 标准包装： | 1 |
| 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-VFQFN 裸露焊盘 |
| 供应商设备封装： | 56-QFN-EP（7x7） |
| 包装： | 标准包装 |
| 产品目录页面： | 809 (CN2011-ZH PDF) |
| 其它名称： | MC34704BEPR2DKR |
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PIN CONNECTIONS
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
30
A
FB7
Input
REG7 voltage feedback
Connect the feedback resistor divider to this pin.
input for voltage
regulation/programming
B
AGND1
-
-
Pin 30 is connected to AGND
31
A
DRV7
Output
REG7 external Power
REG7 external Power MOSFET gate drive.
MOSFET gate drive
B
NC3
No Connect
-
Pin 31 is not connected
32
A
VOUT7
Output
REG7 output voltage
This is the discharge path of REG7 output voltage.
return pin.
B
PGND1
-
-
Pin 32 is connected to PGND
33
A
FB6
Input
REG6 voltage feedback
Connect the feedback resistor divider to this pin.
input for voltage
regulation/programming
B
AGND2
-
-
Pin 33 is connected to AGND
34
A
BT6
Passive
REG6 bootstrap capacitor
Connect a 0.01 μ F capacitor between this pin and SW6 pin to
input pin.
enhance the gate of the Synchronous Power MOSFET.
B
NC4
No Connect
-
Pin 34 is not connected
35
36
A
B
A
SW6
PGND2
VOUT6
Output
-
Output
REG6 switching node
-
REG6 regulated output
The inductor is connected between this pin and the VIN pin.
Pin 35 is connected to PGND
Connect this pin directly to the load directly and to the output
voltage pin
filter as close to the pin as possible.
B
PGND3
-
-
Pin 36 is connected to PGND
37
38
A/B
A/B
AGND
VIN
Ground
Power
Analog ground of the IC
Battery voltage
Analog ground of the IC.
Input decoupling /filtering is required for the device to operate
connection
properly.
39
A/B
VDDI
Output
Internal supply voltage
Connect a 1.0 μ F low ESR decoupling filter capacitor between
this pin and GND.
40
A/B
LION
Input
Battery Detection
Always pull this pin High with a 470kohm Resistor to indicate
Input power is present.
41
A/B
ONOFF
Input
Dual function IC turn On/
This is a hardware enable/disable for the 34704A/B. It can be
Off
connected to a mechanical switch to turn the power On or Off.
42
A/B
BT2U
Passive
REG2 Boost Stage
Connect a 1.0 μ F capacitor between this pin and SW2U pin to
bootstrap capacitor input
pin
enhance the gate of the Switch Power MOSFET.
43
A/B
COMP2
Passive
REG2 compensation
REG2 compensation network connection.
network connection
44
A/B
FB2
Input
REG2 voltage feedback
Connect the feedback resistor divider to this pin.
input for voltage
regulation/programming
45
A/B
BT2D
Passive
REG2 Buck Stage
Connect a 1.0 μ F capacitor between this pin and SW2D pin to
bootstrap capacitor input
pin
enhance the gate of the Switch Power MOSFET.
46
A/B
PVIN2
Power
REG2 power supply input
This is the connection to the drain of the high side switch FET.
voltage
Input decoupling /filtering is required for proper REG2 operation.
Use a 10uf decoupling capacitor for better performance
34704
Analog Integrated Circuit Device Data
6
Freescale Semiconductor
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