參數(shù)資料
型號(hào)： SMM605FR05
廠商： Summit Microelectronics, Inc.
英文描述： Six-Channel Supply Voltage Marginer and Active DC Output Controller (ADOCTM)
中文描述： 6通道電源電壓Marginer和有源直流輸出控制器（ADOCTM）
文件頁(yè)數(shù)： 10/23頁(yè)
文件大?。?/td> 887K
代理商： SMM605FR05
SMM605
Preliminary Information
Summit Microelectronics, Inc
2064 1.1 09/16/03
10
MARGINING
The SMM605 has two additional Active DC Output
Control voltage settings: margin high and margin low.
The margin high and margin low settings can be as
much as
±
10% of the nominal setting depending on
the manufacturer. The SMM605 range can be as
large as 0.35V to VDD. These settings are stored in
the configuration registers and are loaded into the
Active DC Output Control voltage setting by margin
commands issued via the I
C bus. The device must
be enabled for Active DC Output Control in order to
enable margining.
The margin command registers contain two bits that
decode the commands to margin high, margin low, or
control to the nominal setting. Once the SMM605
receives the command to margin the supply voltage, it
begins adjusting the supply voltage to move toward
the desired setting. When this voltage setting is
reached, a bit is set in the margin status registers and
the READY signal becomes active. (Figure 2, 5 and 6)
Note: Configuration writes or reads of registers 00
HEX
to 03
HEX
should not be performed while the SMM605 is
margining.
WRITE PROTECTION
Write protection for the SMM605 is located in a volatile
register where the power-on state is defaulted to write
protect. There are separate write protect modes for the
configuration registers and memory. In order to
remove write protection, the code 55
HEX
is written to
the write protection register. Other codes will enable
write protection. For example, writing 59
HEX
will allow
writes to the configuration register but not to the
memory, while writing 35
HEX
will allow writes to the
memory but not to the configuration registers. In
addition, there is a configuration register lock bit
which, once programmed, does not allow the
configuration registers to be changed.
Figure 5 - Margin High Waveforms
Time/Horizontal division = 200mS
Ch 1 (1V/Div) = 3.3V DC-DC converter output (Yellow trace)
Ch 2 (500mV/Div) = 2.5VDC-DC converter output (Blue trace)
Ch 3 (500mV/Div) = 1.8V DC-DC converter output (Purple trace)
Ch 4 (500mV/Div) = 1.5V DC-DC converter output (Green trace)
Figure 6 - Margin Low Waveforms
Time/Horizontal division = 400mS
Ch 1 (1V/Div) = 3.3V DC-DC converter output (Yellow trace)
Ch 2 (500mV/Div) = 2.5V DC-DC converter output (Blue trace)
Ch 3 (500mV/Div) = 1.8V DC-DC converter output (Purple trace)
Ch 4 (500mV/Div) = 1.5V DC-DC converter output (Green trace)
APPLICATIONS INFORMATION (CONTINUED)
相關(guān)PDF資料
PDF描述
SMM665BFR1 Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer
SMM665BFR2 Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer
SMM665BFR3 Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer
SMM665BFR4 Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer
SMM665BFR5 Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer
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