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| 型号： | NCV8505D2T33G |
| 厂商： | ON Semiconductor |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .4A D2PAK-7 |
| 产品变化通告： | 1Q2012 Discontinuation 30/Mar/2012 |
| 标准包装： | 50 |
| 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： | 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： | TO-263-8，D²Pak（7 引线+接片），TO-263CA |
| 供应商设备封装： | D2PAK-7 |
| 包装： | 管件 |
NCV8505 Series
CIRCUIT DESCRIPTION
REGULATOR CONTROL FUNCTIONS
The NCV8505 contains the microprocessor compatible
control function RESET (Figure 15).
V IN
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 4.0 m A)
to the external DELAY capacitor during the following
proceedings:
1. During Power Up (once the regulation threshold
V OUT
DELAY
RESET
RESET
Threshold
DELAY
Threshold
(V DT )
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
T d T d
Figure 15. 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.
device to regulate before going through the delay
time event again.
Voltage Adjust
Figure 17 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).
The RESET output is an open collector NPN transistor,
controlled by a low voltage detection circuit. The circuit is
V OUT
≈ 5.0 V
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.
ENABLE Function
NCV8505
V ADJ
15 k
1.28 V
5.1 k
C OUT
The part stays in a low I Q sleep mode when the ENABLE
pin is held low. The part has an internal pull down if the pin
is left floating.
The integrity of the ENABLE pin allows it to be tied to the
battery line through an external resistor. It will withstand
load dump potentials in this configuration.
Figure 17. Adjustable Output Voltage
V BAT
Up to 45 V
10 k
V IN
NCV8505
V OUT
ENABLE
GND
Figure 16. ENABLE Function
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCV8505D2T33R4 | 功能描述:低压差稳压器 - LDO 3.3V 400mA 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 |
| NCV8505D2T33R4G | 功能描述:低压差稳压器 - LDO MICROPOWER 400 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 |
| NCV8505D2T50 | 功能描述:低压差稳压器 - LDO 5.0V 400mA 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 |
| NCV8505D2T50G | 功能描述:低压差稳压器 - LDO 5.0V 400mA 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 |
| NCV8505D2T50R4 | 功能描述:低压差稳压器 - LDO 5.0V 400mA 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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