MCP1725-1802E/MC Microchip

MCP1725 500 mA, Low Voltage, Low Quiescent Current LDO Regulator Features Description 500 mA Output Current Capability The MCP1725 is a 500 mA Low Dropout (LDO) linear regulator that provides high current and low output Input Operating Voltage Range: 2.3V to 6.0V voltages in a very small package. The MCP1725 Adjustable Output Voltage Range: 0.8V to 5.0V comes in a fixed (or adjustable) output voltage version, Standard Fixed Output Voltages: with an output voltage range of 0.8V to 5.0V. The - 0.8V, 1.2V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V 500 mA output current capability, combined with the Other Fixed Output Voltage Options Available low output voltage capability, make the MCP1725 a Upon Request good choice for new sub-1.8V output voltage LDO applications that have high current demands. Low Dropout Voltage: 210 mV typical at 500 mA Typical Output Voltage Tolerance: 0.5% The MCP1725 is stable using ceramic output Stable with 1.0 F Ceramic Output Capacitor capacitors that inherently provide lower output noise and reduce the size and cost of the entire regulator Fast response to Load Transients solution. Only 1 F of output capacitance is needed to Low Supply Current: 120 A (typical) stabilize the LDO. Low Shutdown Supply Current: 0.1 A (typical) Using CMOS construction, the quiescent current Adjustable Delay on Power Good Output consumed by the MCP1725 is typically less than Short Circuit Current Limiting and 120 A over the entire input voltage range, making it Overtemperature Protection attractive for portable computing applications that 2x3 DFN-8 and SOIC-8 Package Options demand high output current. When shut down, the quiescent current is reduced to less than 0.1 A. Applications The scaled-down output voltage is internally monitored and a power good (PWRGD) output is provided when High-Speed Driver Chipset Power the output is within 92% of regulation (typical). An Networking Backplane Cards external capacitor can be used on the C pin to DELAY Notebook Computers adjust the delay from 200 s to 300 ms. Network Interface Cards The overtemperature and short circuit current-limiting Palmtop Computers provide additional protection for the LDO during system Video Graphics Adapters fault conditions. 2.5V to 1.XV Regulators Package Types Adjustable (SOIC-8) Fixed (SOIC-8) Adjustable (2x3 DFN) Fixed (2x3 DFN) V IN 1 8 V V OUT 8 V IN 1 V V V OUT IN 1 8 1 8 V OUT IN OUT V ADJ IN 2 7 V IN 2 7 Sense V V 2 2 7 ADJ 7 Sense IN IN 3 6 C SHDN 3 6 DELAY SHDN C DELAY SHDN 3 C SHDN C 6 DELAY 3 6 DELAY GND 4 5 PWRGD 4 GND 5 PWRGD GND GND 45 PWRGD 45 PWRGD Note: DFN tab is at ground potential. 2007 Microchip Technology Inc. DS22026B-page 1MCP1725 Typical Application MCP1725 Fixed Output Voltage V = 1.8V 500 mA V = 2.3V to 2.8V OUT IN 1 V 8 V OUT IN 2 V Sense 7 IN C C 1 2 4.7 F 1F 3 SHDN C 6 DELAY R 1 45GND PWRGD 100 k C 3 On 1000 pF Off PWRGD MCP1725 Adjustable Output Voltage V = 1.2V 500 mA V = 2.3V to 2.8V OUT IN 1 V V 8 OUT IN R 1 2 V 7 ADJ 40 k IN C C 1 2 4.7 F 1F 3 SHDN C 6 DELAY R 3 45GND PWRGD 100 k On R 2 C 3 20 k Off 1000 pF PWRGD DS22026B-page 2 2007 Microchip Technology Inc.