参数资料
型号: KIT13892VLEVBEJ
厂商: Freescale Semiconductor
文件页数: 86/158页
文件大小: 0K
描述: KIT EVAL FOR MC13892
标准包装: 1
主要目的: 电源管理和用户界面
嵌入式:
已用 IC / 零件: MC13892
主要属性: 10 位 ADC,4 输出降压转换器,12 LDO
次要属性: 与 i.MX51、i.MX37、i.MX35、i.MX27 一起使用
已供物品: 板,线缆,文档
FUNCTIONAL DEVICE OPERATION
SUPPLIES
PERIPHERAL INTERFACING
IC interfaces in the lineups generally fall in two categories: low voltage IO primarily associated with the AP IC and certain
peripherals at SPIVCC level (powered from SW4), and a higher voltage interface level associated with other peripherals not
compatible with the 1.8 V SPIVCC. VIOHI is provided at a fixed 2.775 V level for such interfaces, and may also be applied to
other system needs within the guidelines of the regulator specifications. The input VINIOHI is not only used by the VIOHI
regulator, but also by other blocks, therefore it should always be connected to BP, even if the VIOHI regulator is not used by the
system.
VIOHI has an internal PMOS pass FET which will support loads up to 100 mA.
CAMERA
The camera module is supplied by the regulator VCAM. This allows powering the entire module independent of the rest of
other parts of the system, as well as to select from a number of VCAM output levels for camera vendor flexibility. In applications
with a dual camera, it is anticipated that only one of the two cameras is active at a time, allowing the VCAM supply to be shared
between them.
VCAM has an internal PMOS pass FET which will support up to 2.0 Mpixel Camera modules (<65 mA). To support higher
resolution cameras, an external PNP is provided. The external PNP configuration is offered to avoid excess on-chip power
dissipation at high loads, and large differential between BP and output settings. For lower current requirements, an integrated
PMOS pass FET is included. The input pin for the integrated PMOS option is shared with the base current drive pin for the PNP
option. The external PNP configuration must be committed as a hardwired board level implementation, while the operating mode
is selected through the VCAMCONFIG bit after startup. The VCAM is not automatically enabled during the power up sequence,
allowing software to properly set the VCAMCONFIG bit before the regulator is activated. The recommended PNP device is the
ON Semiconductor NSS12100XV6T1G which is capable of handling up to 250 mW of continuous dissipation at a minimum
footprint and 75 °C of ambient. For use cases where up to 500 mW of dissipation is required, the recommended PNP device is
the ON Semiconductor NSS12100UW3TCG. For stability reasons a small minimum ESR may be required.
The input VINCAM should always be connected to BP, even if the VCAM regulator is not used by the system.
Table 56. VCAM Voltage Control
ILoad max
Parameter
VCAM[1:0]
Value
00
01
10
11
Output Voltage
2.5 V
2.6 V
2.75 V
3.00 V
VCAMCONFIG=0
Internal Pass FET
65 mA
65 mA
65 mA
65 mA
VCAMCONFIG=1
External PNP
250 mA
250 mA
250 mA
250 mA
MULTI-MEDIA CARD SUPPLY
This supply domain is generally intended for user accessible multi-media cards, such as Micro-SD (TransFlash), RS-MMC,
and the like. An external PNP is utilized for this LDO to avoid excess on-chip power dissipation at high loads and large differential
between BP and output settings. The external PNP device is always connected to the BP line in the application. VSD may also
be applied to other system needs within the guidelines of the regulator specifications. The recommended PNP device is the ON
Semiconductor NSS12100XV6T1G, which is capable of handling up to 250 mW of continuous dissipation at a minimum footprint
and 75 °C of ambient. For use cases where up to 500 mW of dissipation is required, the recommended PNP device is the ON
Semiconductor NSS12100UW3TCG. For stability reasons a small minimum ESR may be required. At the 1.8 V set point, the
VSD regulator can be powered from an external buck regulator (2.2 V typ) for an efficiency advantage and reduced power
dissipation in the pass devices.
MC13892
Analog Integrated Circuit Device Data
86
Freescale Semiconductor
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