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| 型号： | MCP1727-2502E/MF |
| 厂商： | Microchip Technology |
| 文件页数： | 14/32页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.5V 1.5A 8DFN |
| 产品培训模块： | High Current LDOs |
| 标准包装： | 120 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.5V |
| 输入电压： | 最高 6V |
| 电压 - 压降（标准）： | 0.33V @ 1.5A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1.5A（最小） |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-VDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN-EP（3x3） |
| 包装： | 管件 |
| 产品目录页面： | 665 (CN2011-ZH PDF) |
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MCP1727
3.0
PIN DESCRIPTION
TABLE 3-1:
PIN FUNCTION TABLE
Fixed Output
1
2
3
4
5
6
—
7
8
Exposed Pad
Adjustable
Output
1
2
3
4
5
6
7
—
8
Exposed Pad
Name
V IN
V IN
SHDN
GND
PWRGD
C DELAY
ADJ
Sense
V OUT
EP
Description
Input Voltage Supply
Input Voltage Supply
Shutdown Control Input (active-low)
Ground
Power Good Output (open-drain)
Power Good Delay Set-Point Input
Voltage Sense Input (adjustable version)
Voltage Sense Input (fixed voltage version)
Regulated Output Voltage
Exposed Pad of the DFN Package (ground potential)
3.1
Input Voltage Supply (V IN )
3.4
Power Good Output (PWRGD)
Connect the unregulated or regulated input voltage
source to V IN . If the input voltage source is located
several inches away from the LDO, or the input source
is a battery, it is recommended that an input capacitor
be used. A typical input capacitance value of 1 μF to
10 μF should be sufficient for most applications.
3.2 Shutdown Control Input (SHDN)
The SHDN input is used to turn the LDO output voltage
The PWRGD output is an open-drain output used to
indicate when the LDO output voltage is within 92%
(typically) of its nominal regulation value. The PWRGD
threshold has a typical hysteresis value of 2%. The
PWRGD output is typically delayed by 200 μs (typical,
no capacitance on C DELAY pin) from the time the LDO
output is within 92% + 3% (max hysteresis) of the
regulated output value on power-up. This delay time is
controlled by the C DELAY pin.
on and off. When the SHDN input is at a logic-high
level, the LDO output voltage is enabled. When the
SHDN input is pulled to a logic-low level, the LDO
3.5
Power Good Delay Set-Point Input
(C DELAY )
output voltage is disabled. When the SHDN input is
pulled low, the PWRGD output also goes low and the
LDO enters a low quiescent current shutdown state
where the typical quiescent current is 0.1 μA.
The C DELAY input sets the power-up delay time for the
PWRGD output. By connecting an external capacitor
from the C DELAY pin to ground, the typical delay times
for the PWRGD output can be adjusted from 200 μs (no
3.3
Ground (GND)
capacitance) to 300 ms (0.1 μF capacitor). This allows
for the optimal setting of the system reset time.
Connect the GND pin of the LDO to a quiet circuit
ground. This will help the LDO power supply rejection
ratio and noise performance. The ground pin of the
LDO only conducts the quiescent current of the LDO
(typically 120 μA), so a heavy trace is not required.
3.6
3.6.1
Output Voltage Sense/Adjust Input
(ADJ/Sense)
ADJ
For applications have switching or noisy inputs tie the
GND pin to the return of the output capacitor. Ground
planes help lower inductance and voltage spikes
caused by fast transient load currents and are
recommended for applications that are subjected to
fast load transients.
DS21999B-page 14
For adjustable applications, the output voltage is
connected to the ADJ input through a resistor divider
that sets the output voltage regulation value. This
provides the user the capability to set the output
voltage to any value they desire within the 0.8V to 5.0V
range of the device.
? 2007 Microchip Technology Inc.
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| MCP1727-3002E/MF | 功能描述:低压差稳压器 - LDO 1.5A CMOS LDO 3.0V DFN8 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 |
| MCP1727-3002E/SN | 功能描述:低压差稳压器 - LDO 1.5A CMOS LDO 3.0V SOIC8 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 |
| MCP1727-3302E/MF | 功能描述:低压差稳压器 - LDO 1.5A CMOS LDO 3.3V DFN8 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 |
| MCP1727-3302E/SN | 功能描述:低压差稳压器 - LDO 1.5A Vout=3.3V Extended Temp 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 |
| MCP1727-5002E/MF | 功能描述:低压差稳压器 - LDO 1.5A CMOS LDO 5.0V DFN8 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 |
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