- 您现在的位置：买卖IC网 > PDF目录44988 > LTC1728HS5-5 (LINEAR TECHNOLOGY CORP) 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 PDF资料下载
参数资料
| 型号： | LTC1728HS5-5 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封装： | PLASTIC, SOT-23, 5 PIN |
| 文件页数： | 3/16页 |
| 文件大小： | 197K |
| 代理商： | LTC1728HS5-5 |
11
LTC1727/LTC1728
17278fb
Override Functions (5V Versions Only)
The VCCA pin, if unused, can be tied to either VCC3 or VCC5.
This is an obvious solution since the trip points for VCC3
and VCC5 will always be greater than the trip point for VCCA.
The VCC5 input trip point is disabled if its voltage is equal
to the voltage on VCC3 ±25mV and the voltage on VCC5 is
less than 4.15V. In this manner, the LTC1727-5/
LTC1728-5 will behave as a 3.3V monitor and VCC5 reset
capability will be disabled.
The VCC5 trip point is reenabled when the voltage on VCC5
is equal to the voltage on VCC3 ±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.
APPLICATIO S I FOR ATIO
WU
U
Figure 3. RST Voltage vs Supply Voltage
Figure 2. Single Supply Monitor with Others Disabled
When monitoring either 3.3V or 5V with VCC3 strapped to
VCC5 (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 VRT3, RST is held
low. From VRT3 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
VCC3 = VCC5.
Table 1. Override Truth Table (VCC3 = VCC5)
INPUTS (VCC3 = VCC5 = VCC)
RST
0V
≤ VCC ≤ 1V
—
1V
≤ VCC ≤ VRT3
0
VRT3 ≤ VCC ≤ 4.15V
1
4.15V
≤ VCC ≤ VRT5
0
VRT5 ≤ VCC
1
VCC3
VCC5
VCCA
GND
1
5
4
3
2
RST
LTC1728-5
1727/28 F02
TO SYSTEM
RESET
R1
10k
VCC
3.3V OR 5V
SUPPLY VOLTAGE (V)
0
RST
OUTPUT
VOLTAGE
(V)
3
4
5
4
1727/28 F03
2
1
0
1
2
3
5
VCC3 = VCC5 = VCCA = 0V TO 5V
10k PULL-UP FROM RST TO VCC3
相关PDF资料 |
PDF描述 |
|---|---|
| LTC1729CS8-8.4#TR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| LTC1772BIS6#PBF | 1 A SWITCHING CONTROLLER, 650 kHz SWITCHING FREQ-MAX, PDSO6 |
| LTC1871EMS#PBF-1 | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| LTC1871EMS#TR-1 | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| LTC1871IMS#TRPBF-1 | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1728HS5-5#PBF | 制造商:Linear Technology 功能描述:MONITOR TRIPLE 4.675V ACT LW 5SOT23 制造商:Linear Technology 功能描述:MONITOR, TRIPLE, 4.675V, ACT LW, 5SOT23 制造商:Linear Technology 功能描述:MS-System Monitor/Supervisor, Cut Tape uP Precision Triple Supply Monitor |
| LTC1728HS5-5#TRMPBF | 功能描述:IC MON TRPL MCRPWR TSOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:400 系列:- 类型:备用电池电路 监视电压数目:1 输出:开路漏极，推挽式 复位:高有效/低有效 复位超时:最小为 35 ms 电压 - 阀值:4.65V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:带卷 (TR) 其它名称:ADM691ARZ-REEL7TR |
| LTC1728HS5-5#TRPBF | 功能描述:IC MON TRPL MCRPWR TSOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:400 系列:- 类型:备用电池电路 监视电压数目:1 输出:开路漏极，推挽式 复位:高有效/低有效 复位超时:最小为 35 ms 电压 - 阀值:4.65V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:带卷 (TR) 其它名称:ADM691ARZ-REEL7TR |
| LTC1729CMS8-4.1 | 功能描述:IC CTRLR BATT CHRGR LI-ION 8MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC1729CMS8-4.1#PBF | 功能描述:IC CTRLR BATT CHRGR LI-ION 8MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:1 系列:- 功能:充电管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT |
发布紧急采购，3分钟左右您将得到回复。