参数资料
| 型号： | AP7217A-33SPG-13 |
| 厂商： | Diodes Inc |
| 文件页数： | 7/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .6A 8-SOIC |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 最高 5.5V |
| 电压 - 压降（标准）： | 0.8V @ 600mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 600mA（最小值） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 供应商设备封装： | 8-SOP-EP |
| 包装： | 带卷 (TR) |
AP7217A
3.3V 600mA CMOS LDO
Timing Diagram
t RP
200mSec-TYP.
1.6V
V IN
VD OUT
EN
VR OUT
Application Note
Input Capacitor
A 1 μ F ceramic capacitor is recommended to connect between IN
and GND pins to decouple input power supply glitch and noise.
The amount of the capacitance may be increased without limit. A
lower ESR (Equivalent Series Resistance) capacitor allows the
use of less capacitance, while higher ESR type requires more
capacitance. This input capacitor must be located as close as
possible to the device to assure input stability and less noise. For
PCB layout, a wide copper trace is required for both IN and GND.
ENABLE/SHUTDOWN Operation
The AP7217A is turned on by setting the EN pin high, and is
turned off by pulling it low. If this feature is not used, the EN pin
should be tied to IN pin to keep the regulator output on at all time.
To ensure proper operation, the signal source used to drive the
EN pin must be able to swing above and below the specified
turn-on/off voltage thresholds listed in the Electrical
Characteristics section under V IL and V IH .
VR OUT
VD OUT
Output Capacitor
The output capacitor is required to stabilize and help the transient
EN=0
EN=1
0V
3.3V
Φ
Φ
response of the LDO. The AP7217A is designed to have
excellent transient response for most applications with a small
amount of output capacitance. The AP7217 is stable with any
small ceramic output capacitors of 1.0 μ F or higher value, and the
temperature coefficients of X7R or X5R type. Additional
capacitance helps to reduce undershoot and overshoot during
transient. For PCB layout, the output capacitor must be placed as
close as possible to OUT and GND pins, and keep the leads as
short as possible.
Thermal Considerations
Thermal Shutdown Protection limits power dissipation in
AP7217A. When the operation junction temperature exceeds
150°C, the Over Temperature Protection circuit starts the thermal
shutdown function and turns the pass element off. The pass
element turn on again after the junction temperature cools by
40°C. For continuous operation, do not exceed absolute
maximum operation junction temperature 125°C. The power
dissipation definition in device is:
P D = (V IN ? V OU T) x I OUT + V IN x I Q
The maximum power dissipation depends on the thermal
resistance of IC package, PCB layout, the rate of surroundings
airflow and temperature difference between junction to ambient.
The maximum power dissipation can be calculated by following
formula :
P D(MAX) = ( T J(MAX) - TA ) / θ JA
Where T J(MAX) is the maximum operation junction temperature
125°C, T A is the ambient temperature and the θ JA is the junction
to ambient thermal resistance.
AP7217A Rev. 3
DS31423
7 of 10
OCTOBER 2009
? Diodes Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AP7217A-33SPG-U | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:3.3V 600mA CMOS LDO |
| AP7217C | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:1.25V 600mA CMOS LDO |
| AP7217C-13SPG-13 | 功能描述:低压差稳压器 - LDO LDO 1.25V 600mA CMOS 550MA 0.35V 2.5-5.5V 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 |
| AP7217D | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:1.2V 600mA CMOS LDO |
| AP7217D-12YG-13 | 功能描述:低压差稳压器 - LDO LDO 600mA 2.5-5.5V 0.8V 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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