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参数资料
| 型号： | TC1267VETTR |
| 厂商： | Microchip Technology |
| 文件页数： | 1/14页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V 400MA PCI DDPAK5 |
| 标准包装： | 750 |
| 应用： | 转换器，PCI 外围设备卡应用 |
| 输入电压： | 4.3 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 3.3V |
| 工作温度： | -5°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-263-6，D²Pak（5 引线+接片），TO-263BA |
| 供应商设备封装： | DDPAK/TO-263-5 |
| 包装： | 带卷 (TR) |
TC1267
400mA PCI LDO
Features
General Description
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Glitch Free Transition Between Input Sources
Automatic Input Source Selection
External PMOS Bypass Switch Control
Built-in 5V Detector
1% Regulated Output Voltage Accuracy
400mA Load Current Capability
Kelvin Sense Input
Low Ground Current, Independent of Load
The TC1267 is an application-specific, low dropout
regulator (LDO), specifically intended for use in PCI
peripheral card applications complying with PCI Power
Management (PCI 2.0). It provides an uninterrupted,
3.3V output voltage when the main (5V) or auxiliary
(3.3V) input voltage supplies are present.
The TC1267 consists of an LDO, a voltage threshold
detector, external switchover logic and gate drive
circuitry. It functions as a conventional LDO as long as
Applications
the voltage on the main supply input (V IN ) is above the
lower threshold (3.90V typical). Should the voltage on
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PCMCIA
PCI
Network Interface Cards (NICs)
Cardbus TM Technology
Desktop Computers
V IN fall below the lower threshold, the LDO is disabled
and an external P-channel MOSFET is automatically
turned on, connecting the auxiliary supply input to
V OUT, and ensuring an uninterrupted 3.3V output. The
main supply is automatically selected, if both the main
and auxiliary input supplies are present, and transition
from one input supply to the other is ensured glitch-
Device Selection Table
free. High integration, automatic secondary supply
switchover, Kelvin sensing, and small size make the
Part Number
TC1267VET
Package
5-Pin DDPAK
Junction
Temp. Range
-5°C to +95°C
TC1267 the optimum LDO for PCI 2.0 applications.
Functional Block Diagram
Pin Configuration
V IN
5-Pin DDPAK
Tab is GND
V AUX
Bandgap
Detect
D R
Reference
TC1267
–
1 2 3 4 5
2002 Microchip Technology Inc.
GND
E/A
+
V OUT
DS21378B-page 1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC1268 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:500mA Fixed Output, Fast Response CMOS LDO with Shutdown |
| TC1268-2.5VOA | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:500mA Fixed Output, Fast Response CMOS LDO with Shutdown |
| TC1268-2.5VOATR | 功能描述:低压差稳压器 - LDO 500mA Fixed Output 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 |
| TC1269 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:300mA CMOS LDO with Shutdown and VREF Bypass |
| TC1269_13 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:300mA CMOS LDO with Shutdown and VREF Bypass |
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