参数资料
型号: MC34708VM
厂商: Freescale Semiconductor
文件页数: 63/159页
文件大小: 0K
描述: IC POWER MANAGEMENT 206MAPBGA
标准包装: 160
应用: 通用
电源电压: 1.8 V ~ 4.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 206-LFBGA
供应商设备封装: 206-MAPBGA(13x13)
包装: 托盘
Functional Block Description
?
Internally
Cont rolled Steps
Output
Voltage
Init ial
Set Point
Actual
Output Voltage
Request ed
Set Point
Internally
Controlled St eps
Output Voltage
wit h light Load
Example
Actual Output
Voltage
Possible
Output Voltage
Window
Voltage
Change
Request
Request for
Higher Voltage
I nit iated by SPI Programming, Standby Control
Request for
Lower Voltage
SWxP WGD
Figure 16. Voltage Stepping with DVS
7.5.5
Boost Switching Regulator
SWBST is a boost switching regulator with a programmable output, which defaults to 5.0 V on power up, operating at 2.0 MHz.
SWBST supplies the VUSB regulator for the USB PHY in OTG mode, as well as the VBUS voltage. Note that the parasitic
leakage path for a boost regulator will cause the output voltage and SWBSTFB to sit at a Schottky drop below the battery voltage
whenever SWBST is disabled. The switching NMOS transistor is integrated on-chip. An external fly back Schottky diode,
inductor, and capacitor are required.
VIN
C INBST
L BST
SWBSTIN
V OBST
D BST
SWBSTLX
SWBSTMODE
Driver
GNDSWBST
R SENSE
OC
Controller
SWBSTFAULT
SPI/I 2 C
Interface
SWBSTFB
V REFSC
V REFUV
SC
UV
C OSWBST
Internal
Compensation Z2
Z1
EA
V REF
Figure 17. Boost Regulator Architecture
SWBST output voltage programmable via the SWBST[1:0] SPI bits as shown in Table 51 .
MC34708
Analog Integrated Circuit Device Data ?
63
Freescale Semiconductor
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