参数资料
型号: MC34708VM
厂商: Freescale Semiconductor
文件页数: 67/159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
V NOM ? + ? 0.8V ?
V IN
V NOM ? + ? 0.3V ?
?
I MAX ?
I LOAD
0 ? mA ?
10us ?
10us ?
1us ?
1us
V IN Stimulus for Transient Line
Response
I LOAD Stimulus for Transient Load
Response
I L ? = ? 0 ? mA ?
I L ? = ? I MAX ?
Overshoot ?
V OUT
Overshoot ?
V OUT for Transient Load Response
Active ? Mode
Low ? Power ? Mode
Active ? Mode
Overshoot ?
V OUT
Overshoot ?
Mode ? Transition ?
Time
I L ? < ? IL MAX
I L ? < ? IL MAXLP
V OUT for Mode Transition Response
(V GEN2 , V USB2 , V DAC )
Figure 18. Transient Waveforms
I L ? < ? IL MAX
7.5.6.4
Short-circuit Protection
The higher current LDOs, and those most accessible in product applications, include a short-circuit detection and protection
(VDAC, VUSB, VUSB2, VGEN1, and VGEN2). The short-circuit protection (SCP) system includes debounced fault condition
detection, regulator shutdown, and processor interrupt generation, to contain failures and minimize the chance of product
damage. If an over-current (short-circuit) condition is detected, typically 20% above I LMAX , the LDO will be disabled by resetting
its VxEN bit, while at the same time, an interrupt SCPI will be generated to flag the fault to the system processor. The SCPI
interrupt is maskable through the SCPM mask bit.
The SCP feature is enabled by setting the REGSCPEN bit. If this bit is not set, then not only is no interrupt generated, but also
the regulators will not automatically be disabled upon a short-circuit detection. Note that by default, the REGSCPEN bit is not
set, so at startup, none of the regulators in an overload condition are disabled.
7.5.6.5
VPLL
VPLL is provided for isolated biasing of the application processors PLLs for clock generation, in support of protocol and peripheral
needs. Depending on the application and power requirements, this supply may be considered for sharing with other loads, but
MC34708
Analog Integrated Circuit Device Data ?
67
Freescale Semiconductor
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