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参数资料
| 型号： | MC34704BEPR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 5/54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
11
A/B
PVIN3
Power
REG3 power supply input
This is the connection to the drain of the high side switch FET.
voltage
Input decoupling /filtering is required for proper REG3 operation.
Use a 10uf decoupling capacitor for better performance.
12
A/B
SW3
Output
REG3 switching node
The inductor is connected between this pin and the regulated
REG3 output.
13
A/B
VOUT3
Output
REG3 output voltage
This is the discharge path of REG3 output voltage.
return pin
14
A/B
FB3
Input
REG3 voltage feedback
Connect the feedback resistor divider to this pin.
input for voltage
regulation/programming
15
A/B
SS
Input
Soft start time
The soft start time for all regulators can be adjusted by
connecting this pin to an external resistor divider between VDDI
and AGND pins.
16
A/B
FREQ
Input
Oscillator frequency
The oscillator frequency can be adjusted by connecting this pin
to an external resistor divider between VDDI and AGND pins.
This pin sets F SW1 value.
17
A/B
FB8
Input
REG8 voltage feedback
Connect the feedback resistor divider to this pin.
input for voltage
regulation/programming
18
A/B
BT8
Passive
REG8 bootstrap capacitor
Connect a 0.01 μ F capacitor between this pin and SW8 pin to
input pin
enhance the gate of the Synchronous Power MOSFET.
19
A/B
VOUT8
Output
REG8 regulated output
Connect this pin directly to the load directly and to the output
voltage pin
filter as close to the pin as possible.
20
21
22
A/B
A/B
A/B
SW8
SW1
VG
Output
Output
Passive
REG8 switching node
REG1 switching node
REG1 regulated output
The inductor is connected between this pin and the VIN pin.
The inductor is connected between this pin and the VIN Pin.
REG1 regulated output voltage before the cut-off switch. This
voltage before the cutoff
switch
supplies the internal circuits and the gate drive
23 (1)
A
VOUT1
Output
REG1 regulated output
Connect this pin directly to the load directly and to the output
voltage pin.
filter as close to the pin as possible.
B
NC0
No Connect
-
Pin 23 is not connected.
24
A/B
BT1
Passive
REG1 bootstrap capacitor
Connect a 1.0 μ F capacitor between this pin and SW1 pin to
input pin
enhance the gate of the Switch Power MOSFET.
25
A/B
SCL
Input/Output
I 2 C serial interface clock
I 2 C serial interface clock input.
input
26
A/B
SDA
Input/Output
I 2 C serial interface data
I 2 C serial interface data input.
input
27
A/B
RST
Open Drain
Power reset output signal
This is an open drain output and must be pulled up by an
(Microprocessor Reset)
external resistor to a supply voltage like V IN .
28
A
COMP7
Passive
REG7 compensation
REG7 compensation network connection.
network connection
B
NC1
No Connect
-
Pin 28 is not connected
29
A
VREF7
Output
REG7 resistor feedback
Connect this pin to the bottom of the feedback resistor divider.
network reference voltage
B
NC2
No Connect
-
Pin 29 is not connected
34704
Analog Integrated Circuit Device Data
Freescale Semiconductor
5
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