參數(shù)資料
型號(hào)： AD5100YRQZ-RL7
廠商： ANALOG DEVICES INC
元件分類： 電源管理
英文描述： System-Management IC with Programmable Quad Voltage Monitoring and Supervisory Functions
中文描述： 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16
封裝： 0.025 INCH PITCH, ROHS COMPLIANT, MO-137AB, QSOP-16
文件頁(yè)數(shù)： 13/32頁(yè)
文件大?。?/td> 495K
代理商： AD5100YRQZ-RL7
Preliminary Technical Data
AD5100
Rev. PrJ | Page 13 of 32
V
3MON
V
3MON
is a low-voltage monitoring input that controls the
RESET function of an external device. V
3MON
monitors inputs
from 2.5V to 5.5V. It has an 8-step programmable reset
threshold with an 8-step 0.1ms-200ms reset hold time. The
reset hold time means that the reset of the external device is
held until the programmed-time is reached. The V
3MON
and
reset timing diagrams are shown in Figure 8. The range of
thresholds is shown in Table 5a and the programming code of
the selected-threshold is found in Table 5b. The defaulted
monitoring threshold is 4.36V. Similarly, the range of reset
hold time is shown in Tables 6a and the programming code
of the selected-timing is found in Table 6b. The defaulted
reset hold time is 200ms.
V
3MON
t
GLITCH
t
RS_HOLD*
RESET
V
3MON
t
RS_HOLD*
t
RS_DELAY
t
RS_DELAY
* Programmable
Figure 8. V
3MON
RESET
Timing Diagrams
The V
3MON
pin is monitored by a comparator to detect an
under-voltage condition. It is designed with 1.5% hysteresis.
When the V
3MON
input drops below the programmed UV
threshold, the comparator will become active immediately,
indicating a UV condition has occurred. Due to hysteresis,
the V
3MON
input must be brought above the programmed UV
threshold by 1.5% before the comparator will be in-active,
indicating the UV condition has gone away, see Figure 9.
The V
3MON
comparator is used (in conjunction with a hold
timer) to control the RESET pin.
V
3MON
exhibits typical input resistance of 50KΩ that users
should account the loading effect.
The MR input has an internal resistor pull-up toV
3MON
. The
RESET output are push-pull configured between V
3MON
and
GND.
V
3MON
V
3MON_UV
Hysteresis
UV
In-Active
UV
In-Active
Comparator
Comparator
Figure 9. V
3MON
Hysteresis.
The default V
3MON
threshold is 4.36V. User should refer to
Table 5b if they want to program different setting.
V
4MON
V
4MON
is the lowest voltage monitoring input that controls the
RESET function of an external device or provides a
comparator output, V
4OUT
. V
4MON
monitors input from 0.9V to
3.3V. It has an 8-step programmable reset threshold with an
8-step 0.1ms to 200ms reset hold time. The V
4MON
, reset, and
V
4OUT
timing diagrams are shown in Figure 10. The range of
thresholds is shown in Table 5a and the programming code of
the selected-threshold is found in Tables 5b. The defaulted
monitoring threshold is Disabled. Similarly, the range of
reset hold time is shown in Tables 6a and the programming
code of the selected-timing is found in Table 6b.
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