参数资料
型号: KIT13892VLEVBEJ
厂商: Freescale Semiconductor
文件页数: 69/158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
OPERATING MODES
POWER GATING SPECIFICATIONS AND CONTROL
Table 37. Power Gating Characteristics
Parameter
Output Voltage V OUT
Turn-on Time (66) , (67)
Turn Off Time
Average Bias Current
PWGTx Input Voltage
DC Load Current
Load Capacitance (66)
Condition
Output High
Output Low
Enable to V OUT = V OUTMIN -250 mV
Disable to V OUT < 1.0 V
t > 500 μ s after Enable
NMOS drain voltage
At PWGTDRVx output
Used as a condition for the other parameters
Min
5.0
0.6
0.5
Typ
5.40
50
1.0
Max
5.70
100
100
1.0
5.0
2.0
100
1.0
Units
V
mV
μ s
μ s
μ A
V
nA
nF
Notes
66. Larger capacitive loading values will lead to longer turn on times exceeding the given limits; smaller values will lead to larger ripple at
the output.
67. Input supply is assumed in the range of 3.0 < BP < 4.65 V; lower BP values may extend turn on time, and functionality not supported
for BP less than ~2.7 V.
A power gate driver pulled low may be thought of as power gating being active since this is the condition where a power source
is isolated (or power gated) from its loading on the other side of the switch. The power gate drive outputs are SPI controlled in
the active modes as shown in Table 38 .
Table 38. Power Gate Drive State Control
Mode
Off
Cold Start
Warm Start
Watchdog, On, User Off Wait
User Off, Memory Hold, Internal Memory Hold Power Cut
PWGTDRV1
L ow
Low
Low
SPI Controlled
Low
PWGTDRV2
Low
Low
Low
SPI Controlled
Low
When SPI controlled (Watchdog, On, and User Off Wait states), the PWGTDRVx power gate drive pin states are determined
by SPI enable bits PWGTxSPIEN, according to Table 39 .
Table 39. Power Gating Logic Table
PWGTxSPIEN
1
0
PWGTDRVx
Low
High
Notes
68. Applicable for Watchdog, On and User Off Wait modes only. If PWGT1SPIEN
AND PWGT2SPIEN both = 1 then the charge pump is disabled.
GENERAL PURPOSE OUTPUTS
GPO drivers included can provide useful system level signaling with SPI enabling and programmable Standby control. Key
use cases for GPO outputs include battery pack thermistor biasing and enabling of peripheral devices, such as light sensor(s),
camera flash, or even supplemental regulators.
SPI enabling can be used for coordinating GPOs with ADC conversions for consumption efficiency and desired settling
characteristics.
Four general purpose outputs are provided, summarized in Table 40 and Table 41 (active high polarities assumed).
MC13892
Analog Integrated Circuit Device Data
Freescale Semiconductor
69
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