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MCP1701A 数据表(PDF) 10 Page - Microchip Technology |
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MCP1701A 数据表(HTML) 10 Page - Microchip Technology |
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10 / 22 page  MCP1701A DS21991C-page 10 © 2007 Microchip Technology Inc. 4.0 DETAILED DESCRIPTION The MCP1701A is a low-quiescent current, precision, fixed-output voltage LDO. Unlike bipolar regulators, the MCP1701A supply current does not increase proportionally with load current. 4.1 Output Capacitor A minimum of 1 µF output capacitor is required. The output capacitor should have an ESR greater than 0.1 Ω and less than 5Ω, plus a resonant frequency above 1 MHz. Larger output capacitors can be used to improve supply noise rejection and transient response. Care should be taken when increasing COUT to ensure that the input impedance is not high enough to cause high input impedance oscillation. 4.2 Input Capacitor A 1 µF input capacitor is recommended for most applications when the input impedance is on the order of 10 Ω. Larger input capacitance may be required for stability when operating from a battery input, or if there is a large distance from the input source to the LDO. When large values of output capacitance are used, the input capacitance should be increased to prevent high source impedance oscillations. 4.3 Overcurrent The MCP1701 internal circuitry monitors the amount of current flowing through the P-channel pass transistor. In the event of a short circuit or excessive output current, the MCP1701 will act to limit the output current. FIGURE 4-1: MCP1701A Block Diagram. VIN VOUT GND Short Circuit Protection Voltage Reference |
类似零件编号 - MCP1701A |
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类似说明 - MCP1701A |
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