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參數(shù)資料
| 型號(hào)： | LTC1728 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Micropower Precision Triple Supply Monitors in 5-Lead SOT-23 Packages(微功耗精密三路電源監(jiān)視器（5腳SOT-23封裝）) |
| 中文描述： | 微精密的三路電源監(jiān)視器在5引腳SOT - 23封裝（微功耗精密三路電源監(jiān)視器（5腳的SOT - 23封裝）） |
| 文件頁(yè)數(shù)： | 10/16頁(yè) |
| 文件大?。?/td> | 192K |
| 代理商： | LTC1728 |
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10
LTC1727/LTC1728
Override Functions (5V Versions Only)
The V
CCA
pin, if unused, can be tied to either V
CC3
or V
CC5
.
This is an obvious solution since the trip points for V
CC3
and V
CC5
will always be greater than the trip point for V
CCA
.
The V
CC5
input trip point is disabled if its voltage is equal
to the voltage on V
CC3
±
25mV and the voltage on V
CC5
is
less than 4.15V. In this manner, the LTC1727-5/
LTC1728-5 will behave as a 3.3V monitor and V
CC5
reset
capability will be disabled.
The V
CC5
trip point is reenabled when the voltage on V
CC5
is equal to the voltage on V
CC3
±
25mV and the two inputs
are greater than approximately 4.15V. In this manner, the
part can function as a 5V monitor with the 3.3V monitor
disabled.
APPLICATIU
W
U
U
Figure 3. RST Voltage vs Supply Voltage
Figure 2. Single Supply Monitor with Others Disabled
When monitoring either 3.3V or 5V with V
CC3
strapped to
V
CC5
(see Figure 2), the part determines which is the
appropriate range. The part handles this situation as
shown in Figure 3. Above 1V and below V
RT3
, RST is held
low. From V
RT3
to approximately 4.15V the part assumes
3.3V supply monitoring and RST is deasserted. Above
approximately 4.15V the part operates as a 5V monitor.
In most systems the 5V supply will pass through the 3.1V
to 4.15V region in <200ms during power-up, and the
RST output will behave as desired. Table 1 summarizes
the state of RST at various operating voltages with
V
CC3
= V
CC5
.
Table 1. Override Truth Table (V
CC3
= V
CC5
)
INPUTS (V
CC3
= V
CC5
= V
CC
)
0V
≤
V
CC
≤
1V
1V
≤
V
CC
≤
V
RT3
V
RT3
≤
V
CC
≤
4.15V
4.15V
≤
V
CC
≤
V
RT5
V
RT5
≤
V
CC
RST
—
0
1
0
1
V
CC3
V
CC5
V
CCA
GND
1
5
4
3
2
RST
LTC1728-5
1727/28 F02
TO SYSTEM
RESET
R1
10k
V
CC
3.3V OR 5V
SUPPLY VOLTAGE (V)
0
R
3
4
5
4
1727/28 F03
2
1
0
1
2
3
5
V
CC3
= V
CC5
= V
CCA
= 0V TO 5V
10k PULL-UP FROM RST TO V
CC3
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1728ES5-1.8#PBF | 制造商:Linear Technology 功能描述:Volt Supervisor Monitor 3V/1.8V 5-Pin TSOT-23 制造商:Linear Technology 功能描述:MONITOR TRIPLE 1.683V ACT L 制造商:Linear Technology 功能描述:MONITOR, TRIPLE, 1.683V, ACT LW, 5SOT23 |
| LTC1728ES5-1.8#TR | 功能描述:IC MON TRPL MCRPWR TSOT23-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:400 系列:- 類型:備用電池電路 監(jiān)視電壓數(shù)目:1 輸出:開(kāi)路漏極，推挽式 復(fù)位:高有效/低有效 復(fù)位超時(shí):最小為 35 ms 電壓 - 閥值:4.65V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:帶卷 (TR) 其它名稱:ADM691ARZ-REEL7TR |
| LTC1728ES5-1.8#TRM | 功能描述:IC MON TRI SUPPLY 1.8V TSOT23-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:400 系列:- 類型:備用電池電路 監(jiān)視電壓數(shù)目:1 輸出:開(kāi)路漏極，推挽式 復(fù)位:高有效/低有效 復(fù)位超時(shí):最小為 35 ms 電壓 - 閥值:4.65V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:帶卷 (TR) 其它名稱:ADM691ARZ-REEL7TR |
| LTC1728ES5-1.8#TRMPBF | 功能描述:IC MON TRI SUPPLY 1.8V TSOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:400 系列:- 類型:備用電池電路 監(jiān)視電壓數(shù)目:1 輸出:開(kāi)路漏極，推挽式 復(fù)位:高有效/低有效 復(fù)位超時(shí):最小為 35 ms 電壓 - 閥值:4.65V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:帶卷 (TR) 其它名稱:ADM691ARZ-REEL7TR |
| LTC1728ES5-1.8#TRPBF | 功能描述:IC MON TRI SUPPLY 1.8V TSOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:400 系列:- 類型:備用電池電路 監(jiān)視電壓數(shù)目:1 輸出:開(kāi)路漏極，推挽式 復(fù)位:高有效/低有效 復(fù)位超時(shí):最小為 35 ms 電壓 - 閥值:4.65V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:帶卷 (TR) 其它名稱:ADM691ARZ-REEL7TR |
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