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TC1266 bảng dữ liệu(PDF) 1 Page - Microchip Technology |
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TC1266 bảng dữ liệu(HTML) 1 Page - Microchip Technology |
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1 / 16 page  © 2002 Microchip Technology Inc. DS21377B-page 1 TC1266 Features • Glitch Free Transition Between Input Sources • Automatic Input Source Selection • External PMOS Bypass Switch Control • Built-in 5V Detector • 1% Regulated Output Voltage Accuracy • 200mA Load Current Capability • Kelvin Sense Input • Low Dropout Voltage (240mV @ Full Load) • Low Ground Current, Independent of Load Applications • PCMCIA •PCI • Network Interface Cards (NICs) • CardbusTM Technology Device Selection Table Package Type General Description The TC1266 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, 200mA (max) output voltage when the main (5V) or auxiliary (3.3V) input voltage supplies are present. TheTC1266consistsof anLDO, a voltagethreshold detector, external switchover logic and gate drive circuitry. It functions as a conventional LDO as long as the voltage on the main supply input (VIN) is above the lower threshold (3.90V typical). Should the voltage on VIN 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 VOUT, 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- free. High integration, automatic secondary supply switchover, Kelvin sensing, and small size make the TC1266 the optimum LDO for PCI 2.0 applications. Functional Block Diagram Part Number Package Junction Temp. Range TC1266VOA 8-Pin SOIC (Narrow) -5°C to +125°C TC1266VUA 8-Pin MSOP -5°C to +125°C 1 2 3 4 8 7 6 5 TC1266 SENSE VOUT NC 8-Pin SOIC NC VAUX GND VIN DR 1 2 3 4 8 7 6 5 TC1266 8-Pin MSOP NC VAUX GND VIN SENSE VOUT NC DR + – VIN VAUX GND DR VOUT SENSE Bandgap Reference Detect E/A 200mA PCI LDO |
Số phần tương tự - TC1266 |
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Mô tả tương tự - TC1266 |
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