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参数资料
| 型号： | NCV8502D33R2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 9/14页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .15A 8SOIC |
| 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 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： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 剪切带 (CT) |
| 其它名称： | NCV8502D33R2GOSCT |
NCV8502 Series
CIRCUIT DESCRIPTION
REGULATOR CONTROL FUNCTIONS
The NCV8502 contains the microprocessor compatible
control function RESET (Figure 12).
V IN
1. During Power Up (once the regulation threshold
has been verified).
2. After a reset event has occurred and the device is
back in regulation. The DELAY capacitor is
discharged when the regulation (RESET threshold)
has been violated. This is a latched incident. The
capacitor will fully discharge and wait for the
V OUT
DELAY
RESET
RESET
Threshold
DELAY
Threshold
(V DT )
device to regulate before going through the delay
time event again.
FLAG/Monitor Function
An on ? chip comparator is provided to perform an early
warning to the microprocessor of a possible reset signal. The
T d T d
Figure 12. Reset and Delay Circuit Wave Forms
RESET Function
A RESET signal (low voltage) is generated as the IC
powers up until V OUT is within 6.0% of the regulated output
voltage, or when V OUT drops out of regulation,and is lower
than 8.0% below the regulated output voltage. Hysteresis is
included in the function to minimize oscillations.
The RESET output is an open collector NPN transistor,
reset signal typically turns the microprocessor off
instantaneously. This can cause unpredictable results with
the microprocessor. The signal received from the FLAG pin
will allow the microprocessor time to complete its present
task before shutting down. This function is performed by a
comparator referenced to the bandgap reference. The actual
trip point can be programmed externally using a resistor
divider to the input monitor (MON) (Figure 14). The typical
threshold is 1.20 V on the MON pin.
V OUT
controlled by a low voltage detection circuit. The circuit is
functionally independent of the rest of the IC thereby
guaranteeing that the RESET signal is valid for V OUT as low
as 1.0 V.
V BAT
V IN
NCV8502
MON FLAG
C OUT
V CC
I/O
m P
Adjustable Reset Function
The reset threshold can be made lower by connecting an
external resistor divider to the R ADJ lead from the V OUT
lead, as displayed in Figure 13. This lead is grounded to
R ADJ RESET
DELAY GND
RESET
select the default value of 4.6 V.
to m P and
System
Figure 14. FLAG/Monitor Function
Voltage Adjust
Figure 15 shows the device setup for a user configurable
R ADJ
NCV8502
V OUT
R RST
Power
C OUT
output voltage. The feedback to the V ADJ pin is taken from
a voltage divider referenced to the output voltage. The loop
is balanced around the Unity Gain threshold (1.28 V
typical).
DELAY
RESET
C DELAY
to m P and
RESET
Port
V OUT
NCV8502
V ADJ
15 k
1.28 V
≈ 5.0 V
C OUT
5.1 k
Figure 13. Adjustable RESET
DELAY Function
The reset delay circuit provides a programmable (by
external capacitor) delay on the RESET output lead.
The DELAY lead provides source current (typically 2.5 m A)
to the external DELAY capacitor during the following
proceedings:
http://onsemi.com
9
Figure 15. Adjustable Output Voltage
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCV8502D50 | 功能描述:低压差稳压器 - LDO 5.0V 150mA w/Delay 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 |
| NCV8502D50G | 功能描述:低压差稳压器 - LDO 5.0V 150mA w/Delay 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 |
| NCV8502D50R2 | 功能描述:低压差稳压器 - LDO 5.0V 150mA w/Delay 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 |
| NCV8502D50R2G | 功能描述:低压差稳压器 - LDO 5.0V 150mA w/Delay 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 |
| NCV8502D80 | 功能描述:低压差稳压器 - LDO 8.0V 150mA w/Delay 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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