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MCP1827ST-3302EAB Datasheet(PDF) 1 Page - Microchip Technology |
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MCP1827ST-3302EAB Datasheet(HTML) 1 Page - Microchip Technology |
1 / 32 page © 2006 Microchip Technology Inc. DS22001B-page 1 MCP1827/MCP1827S Features • 1.5A Output Current Capability • Input Operating Voltage Range: 2.3V to 6.0V • Adjustable Output Voltage Range: 0.8V to 5.0V (MCP1827 only) • Standard Fixed Output Voltages: - 0.8V, 1.2V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V • Other Fixed Output Voltage Options Available Upon Request • Low Dropout Voltage: 330 mV Typical at 1.5A • Typical Output Voltage Tolerance: 0.5% • Stable with 1.0 µF Ceramic Output Capacitor • Fast response to Load Transients • Low Supply Current: 120 µA (typ) • Low Shutdown Supply Current: 0.1 µA (typ) (MCP1827 only) • Fixed Delay on Power Good Output (MCP1827 only) • Short Circuit Current Limiting and Overtemperature Protection • 5-Lead Plastic DDPAK, 5-Lead TO-220 Package Options (MCP1827) • 3-Lead Plastic DDPAK, 3-Lead TO-220 Package Options (MCP1827S) Applications • High-Speed Driver Chipset Power • Networking Backplane Cards • Notebook Computers • Network Interface Cards • Palmtop Computers • 2.5V to 1.XV Regulators Description The MCP1827/MCP1827S is a 1.5A Low Dropout (LDO) linear regulator that provides high current and low output voltages. The MCP1827 comes in a fixed or adjustable output voltage version, with an output voltage range of 0.8V to 5.0V. The 1.5A output current capability, combined with the low output voltage capability, make the MCP1827 a good choice for new sub-1.8V output voltage LDO applications that have high current demands. The MCP1827S is a 3-pin fixed voltage version. The MCP1827/MCP1827S is based upon the MCP1727 LDO device. The MCP1827/MCP1827S is stable using ceramic output capacitors that inherently provide lower output noise and reduce the size and cost of the entire regulator solution. Only 1 µF of output capacitance is needed to stabilize the LDO. Using CMOS construction, the quiescent current consumed by the MCP1827/MCP1827S is typically less than 120 µA over the entire input voltage range, making it attractive for portable computing applications that demand high output current. The MCP1827 versions have a Shutdown (SHDN) pin. When shut down, the quiescent current is reduced to less than 0.1 µA. On the MCP1827 fixed output versions the scaled- down output voltage is internally monitored and a power good (PWRGD) output is provided when the output is within 92% of regulation (typical). The PWRGD delay is internally fixed at 200 µs (typical). The overtemperature and short circuit current-limiting provide additional protection for the LDO during system fault conditions. Package Types Fixed/Adjustable 3-LD DDPAK 5-LD DDPAK 3-LD TO-220 5-LD TO-220 12 3 4 5 123 4 5 12 3 12 3 MCP1827 MCP1827 MCP1827S MCP1827S 1.5A, Low Voltage, Low Quiescent Current LDO Regulator |
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