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参数资料
| 型号： | NCV8504PW25R2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.5V .4A 16SOIC |
| 标准包装： | 1,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.5V |
| 输入电压： | 最高 45 V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 400mA |
| 电流 - 限制（最小）： | 425mA |
| 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： | 带卷 (TR) |
| 其它名称： | NCV8504PW25R2GOS |
NCV8504 Series
CIRCUIT DESCRIPTION
REGULATOR CONTROL FUNCTIONS
The NCV8504 contains the microprocessor compatible
control function RESET (Figure 13).
V IN
The DELAY lead provides source current (typically 4.0 μ A)
to the external DELAY capacitor during the following
proceedings:
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
V OUT
DELAY
RESET
RESET
Threshold
DELAY
Threshold
(V DT )
discharged when the regulation (RESET threshold)
has been violated. This is a latched incident. The
capacitor will fully discharge and wait for the
device to regulate before going through the delay
time event again.
T d T d
Figure 13. 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 1.5% of the regulated output
voltage, or when V OUT drops out of regulation,and is lower
than 4.0% below the regulated output voltage. Hysteresis is
included in the function to minimize oscillations.
The RESET output is an open collector NPN transistor,
FLAG/Monitor Comparator
A general use comparator is included whose positive input
terminal is tied to the on ? chip bandgap voltage reference.
This provides a very temperature stable referenced
comparator with versatile use in any system. The trip point
can be programmed externally using a resistor divider to the
input monitor (MON) (Figure 15). The typical threshold is
1.29 V on the MON pin.
V MON
V IN
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 OUT
NCV8504
MON FLAG
C OUT
V CC
I/O
μ 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 14. This lead is grounded to
R ADJ
DELAY
RESET
GND
RESET
select the default value of 4.6 V (on the 5.0 V option).
Figure 15. Flag/Monitor Function
V R(ADJ)
R ADJ
NCV8504
V OUT
R RST
to μ P and
System
Power
C OUT
Voltage Adjust
Figure 16 shows the device setup for a user configurable
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 (1.30 V
typical).
DELAY
RESET
to μ P and
RESET
V OUT
≈ 5.0 V
C DELAY
Port
NCV8504
15 k
C OUT
Figure 14. Adjustable RESET
DELAY Function
The reset delay circuit provides a programmable (by
V ADJ
1.28 V
5.1 k
external capacitor) delay on the RESET output lead.
Figure 16. Adjustable Output
Voltage
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCV8504PW33 | 功能描述:低压差稳压器 - LDO 3.3V 400mA 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 |
| NCV8504PW33G | 功能描述:低压差稳压器 - LDO 3.3V 400mA 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 |
| NCV8504PW33R2 | 功能描述:低压差稳压器 - LDO 3.3V 400mA 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 |
| NCV8504PW33R2G | 功能描述:低压差稳压器 - LDO 3.3V 400mA 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 |
| NCV8504PW50 | 功能描述:低压差稳压器 - LDO 5.0V 400mA 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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