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參數(shù)資料
| 型號(hào)： | ISL88031IU8HFZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Quintuple Voltage Monitor |
| 中文描述： | 5-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | ROHS COMPLIANT, PLASTIC, MO-187AA, MSOP-8 |
| 文件頁(yè)數(shù)： | 5/7頁(yè) |
| 文件大?。?/td> | 243K |
| 代理商： | ISL88031IU8HFZ |
5
FN8227.0
March 31, 2006
Power On Reset (POR)
Applying power to the ISL88031 activates a POR circuit which
makes the reset pin(s) active (i.e. RST goes high while RST
goes low). These signals provide several benefits:
It prevents the system microprocessor from starting to
operate with insufficient voltage.
It prevents the processor from operating prior to stabilization
of the oscillator.
It ensures that the monitored device is held out of operation
until internal registers are properly loaded.
It allows time for an FPGA to download its configuration prior
to initialization of the circuit.
The reset signal remains active until V
DD
rises above the
minimum voltage sense level for time period t
POR
. This
ensures that the supply voltage has stabilized to sufficient
operating levels.
Manual Reset
The manual-reset input (MR) allows the user to trigger a reset
by using a push-button switch or by signaling the input low. The
MR input is an active low debounced input. Reset is asserted if
the MR pin is pulled low to less than 100mV for the minimum
MR pulse width or longer while the push-button is closed. After
MR is released, the reset output remains asserted low for t
POR
(200ms) and then is released.
Figures 2 and 3 illustrate the operation ISL88031’s
operation. Figure 4 shows the ISL88031EVAL, the
evaluation platform for this family of voltage monitors.
Figures 5 and 6 illustrate RST output response times.
The ISL88031EVAL1 and Applications
The ISL88031EVAL1 supports all variants of the ISL88031
devices, enabling evaluation of basic functional operation
and common application implementations. Figure 4
illustrates the ISL88031EVAL1 in schematic and
photographic forms. The ISL88031EVAL1 has two isolated
circuits, the left circuit is populated with the
ISL88031IU8HFZ (V
DD
V
TH1
= 4.64V, V2MON
V
TH2
= 3.08V). The right circuit is unpopulated for the user
to customize to provide a specific voltage monitoring solution
with the accompanying loose packed variants.
With adequate bias on the two preset and the three
adjustable monitor inputs the RST output will release to pull
high indicating that all supplies are compliant for a minimum
of t
POR
. For the ISL88031EVAL1 as shipped the V
DD
and
V2MON nominal thresholds are as previously noted with the
voltage thresholds being monitored by V3MON, V4MON and
V5MON being nominally 1.990V, 1.44V and 0.95V
respectively.
Special Application Considerations
Using good decoupling practices on bias and other
monitoring inputs will prevent transients (i.e. due to switching
noises and short duration droops in the supply voltage) from
causing unwanted resets.
Although the internal ISL88031 threshold references are
guaranteed over the full temp range accuracy errors due to
external component tolerances and distribution looses will
occur. High tolerance resistors and layout for extreme
accuracy and critical performance must be considered.
V
DD /
V2MON
MR
RST
t
POR
V
TH1 / 2
1V
t
POR
t
POR
>t
MR
t
RPD
FIGURE 2. POWER SUPPLY MONITORING DIAGRAM
>t
MD
ISL88031
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| ISL88031IUHFZS2711 | 功能描述:IC QUINTUPLE VOLT MONITOR RoHS:是 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 類型:簡(jiǎn)單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:開路漏極或開路集電極 復(fù)位:低有效 復(fù)位超時(shí):最小為 1.12 s 電壓 - 閥值:2.63V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-236-3，SC-59，SOT-23-3 供應(yīng)商設(shè)備封裝:SOT-23-3 包裝:帶卷 (TR) 其它名稱:576-3800-2 |
| ISL88031IUHFZTKS2711 | 功能描述:IC VOLTAGE MONITOR QUINT 8-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:簡(jiǎn)單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:開路漏極或開路集電極 復(fù)位:低有效 復(fù)位超時(shí):最小為 600 ms 電壓 - 閥值:3.8V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:帶卷 (TR) |
| ISL88041EVAL1 | 功能描述:EVAL BOARD 1 FOR ISL88041 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:* 標(biāo)準(zhǔn)包裝:1 系列:PSoC® 主要目的:電源管理，熱管理 嵌入式:- 已用 IC / 零件:- 主要屬性:- 次要屬性:- 已供物品:板，CD，電源 |
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