- 您现在的位置：买卖IC网 > PDF目录5011 > MCP1824ST-3302E/DB (Microchip Technology)IC REG LDO 3.3V .3A SOT223-3 PDF资料下载
参数资料
| 型号： | MCP1824ST-3302E/DB |
| 厂商： | Microchip Technology |
| 文件页数： | 20/34页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .3A SOT223-3 |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 最高 6V |
| 电压 - 压降（标准）： | 0.2V @ 300mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 300mA（最小） |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-261-4，TO-261AA |
| 供应商设备封装： | SOT-223-3 |
| 包装： | 标准包装 |
| 产品目录页面： | 666 (CN2011-ZH PDF) |
| 其它名称： | MCP1824ST-3302E/DBDKR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页当前第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页
MCP1824/MCP1824S
4.6
Shutdown Input (SHDN)
4.7
Dropout Voltage and Undervoltage
The SHDN input is an active-low input signal that turns
the LDO on and off. The SHDN threshold is a
percentage of the input voltage. The typical value of
this shutdown threshold is 30% of V IN , with minimum
and maximum limits over the entire operating
temperature range of 45% and 15%, respectively.
The SHDN input will ignore low-going pulses (pulses
meant to shut down the LDO) that are up to 400 ns in
pulse width. If the shutdown input is pulled low for more
than 400 ns, the LDO will enter Shutdown mode. This
small bit of filtering helps to reject any system noise
spikes on the shutdown input signal.
On the rising edge of the SHDN input, the shutdown
circuitry has a 30 μs delay before allowing the LDO
output to turn on. This delay helps to reject any false
turn-on signals or noise on the SHDN input signal. After
the 30 μs delay, the LDO output enters its soft-start
period as it rises from 0V to its final regulation value. If
the SHDN input signal is pulled low during the 30 μs
delay period, the timer will be reset and the delay time
will start over again on the next rising edge of the
SHDN input. The total time from the SHDN input going
high (turn-on) to the LDO output being in regulation is
typically 100 μs. See Figure 4-4 for a timing diagram of
the SHDN input.
T OR
400 ns (typ)
Lockout
Dropout voltage is defined as the input-to-output
voltage differential at which the output voltage drops
2% below the nominal value that was measured with a
V R + 0.5V differential applied. The MCP1824/
MCP1824S LDO has a very low dropout voltage
specification of 210 mV (typical) at 300 mA of output
for maximum dropout voltage specifications.
The MCP1824/MCP1824S LDO operates across an
input voltage range of 2.1V to 6.0V and incorporates
input Undervoltage Lockout (UVLO) circuitry that keeps
the LDO output voltage off until the input voltage
reaches a minimum of 2.00V (typical) on the rising
edge of the input voltage. As the input voltage falls, the
LDO output will remain on until the input voltage level
reaches 1.82V (typical).
Since the MCP1824/MCP1824S LDO undervoltage
lockout activates at 1.82V as the input voltage is falling,
the dropout voltage specification does not apply for
output voltages that are less than 1.8V.
For high-current applications, voltage drops across the
PCB traces must be taken into account. The trace
resistances can cause significant voltage drops
between the input voltage source and the LDO. For
applications with input voltages near 2.1V, these PCB
trace voltage drops can sometimes lower the input
voltage enough to trigger a shutdown due to
30 μs
70 μ s
undervoltage lockout.
SHDN
4.8
Overtemperature Protection
The MCP1824/MCP1824S LDO has temperature-
sensing circuitry to prevent the junction temperature
from exceeding approximately 150 ° C. If the LDO
V OUT
junction temperature does reach 150 ° C, the LDO
output will be turned off until the junction temperature
cools to approximately 140 ° C, at which point the LDO
FIGURE 4-4:
Diagram.
DS22070A-page 20
Shutdown Input Timing
output will automatically resume normal operation. If
the internal power dissipation continues to be
excessive, the device will again shut off. The junction
temperature of the die is a function of power
dissipation, ambient temperature and package thermal
for more information on LDO power
dissipation and junction temperature.
2007 Microchip Technology Inc.
相关PDF资料 |
PDF描述 |
|---|---|
| MCP1824T-1202E/DC | IC REG LDO 1.2V .3A SOT223-5 |
| MCP1824ST-2502E/DB | IC REG LDO 2.5V .3A SOT223-3 |
| MCP1824ST-1202E/DB | IC REG LDO 1.2V .3A SOT223-3 |
| MCP1824T-3002E/DC | IC REG LDO 3V .3A SOT223-5 |
| RSM28DTKI | CONN EDGECARD 56POS DIP .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP1824ST-5002E/DB | 功能描述:低压差稳压器 - LDO 300 mA CMOS LDO Vout 5.0V Ext Temp Range RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MCP1824ST-ADJE/DB | 功能描述:低压差稳压器 - LDO 300 mA CMOS LDO Adj Vout Ext Temp Range RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MCP1824T-0802E/DC | 功能描述:低压差稳压器 - LDO 300 mA CMOS LDO Vout 0.8V ETR RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MCP1824T-0802E/OT | 功能描述:低压差稳压器 - LDO 300 mA CMOS LDO Vout 0.8V ETR RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MCP1824T-0802E/OT | 制造商:Microchip Technology Inc 功能描述:; Input Voltage Primary Max:6V; Output V |
发布紧急采购，3分钟左右您将得到回复。