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| 型号： | NCV8501PDW33 |
| 厂商： | ON Semiconductor |
| 文件页数： | 11/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .15A 16-SOIC |
| 产品变化通告： | LTB Notification 03/Jan/2008 |
| 标准包装： | 47 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 最高 45 V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 150mA |
| 电流 - 限制（最小）： | 151mA |
| 工作温度： | -40°C ~ 150°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽）裸露焊盘 |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 管件 |
NCV8501 Series
APPLICATION NOTES
V IN
V OUT
V IN
NCV8501
V OUT
V ADJ
MJD31C
>1 Amp
5.0 V
C IN *
0.1 m F
NCV8501
RESET
R RST
C OUT **
10 m F
V BAT
C2
0.1 m F
R1
294 k
R2
100 k
C1
47 m F
*C IN required if regulator is located far from the power supply filter
**C OUT required for stability. Capacitor must operate at minimum
temperature expected
Figure 20. Test and Application Circuit Showing
tDELAY +
Figure 18. Additional Output Current
Adding Capability
Figure 18 shows how the adjustable version of parts can
be used with an external pass transistor for additional current
capability. The setup as shown will provide greater than 1
Amp of output current.
FLAG MONITOR
Figure 19 shows the FLAG Monitor waveforms as a result
of the circuit depicted in Figure 16. As the output voltage
falls (V OUT ), the Monitor threshold is crossed. This causes
the voltage on the FLAG output to go low sending a warning
signal to the microprocessor that a RESET signal may occur
Output Compensation
SETTING THE DELAY TIME
The delay time is controlled by the Reset Delay Low
Voltage, Delay Switching Threshold, and the Delay Charge
Current. The delay follows the equation:
CDELAY(Vdt * Reset Delay Low Voltage)
Delay Charge Current
Example:
Using C DELAY = 33 nF.
Assume reset Delay Low Voltage = 0.
Use the typical value for V dt = 1.8 V.
Use the typical value for Delay Charge Current = 2.5 m A.
in a short period of time. T WARNING is the time the
microprocessor has to complete the function it is currently
working on and get ready for the RESET shutdown signal.
tDELAY +
33 nF(1.8 * 0)
2.5 m A
+ 23.8 ms
V OUT
MON
FLAG Monitor
Ref. Voltage
STABILITY CONSIDERATIONS
The output or compensation capacitor helps determine
three main characteristics of a linear regulator: start ? up
delay, load transient response and loop stability.
The capacitor value and type should be based on cost,
availability, size and temperature constraints.
The value for the output capacitor C OUT shown in Figure 20
should work for most applications, however it is not
necessarily the optimized solution.
RESET
FLAG
T WARNING
Figure 19. FLAG Monitor Circuit Waveform
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCV8501PDW33G | 功能描述:低压差稳压器 - LDO 3.3V 150mA w/ENABLE 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 |
| NCV8501PDW33R2 | 功能描述:低压差稳压器 - LDO 3.3V 150mA w/ENABLE 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 |
| NCV8501PDW33R2G | 功能描述:低压差稳压器 - LDO 3.3V 150mA w/ENABLE 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 |
| NCV8501PDW50 | 功能描述:低压差稳压器 - LDO 5.0V 150mA w/ENABLE 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 |
| NCV8501PDW50G | 功能描述:低压差稳压器 - LDO 5.0V 150mA w/ENABLE 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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