MCP1725-ADJE/MC

A 500 mA Low Dropout (LDO) linear regulator that provides high current and low output voltages in a very small package. Comes in a fixed (or adjustable) output voltage version, with an output voltage range of 0.8V to 5.0V. The 500 mA output current capability, combined with the low output voltage capability, make it a good choice for new sub-1.8V output voltage LDO applications that have high current demands. 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 is typically less than 120 μA over the entire input voltage range, making it attractive for portable computing applications that demand high output current. When shut down, the quiescent current is reduced to less than 0.1 μA. 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). An external capacitor can be used on the CDELAY pin to adjust the delay from 200 μs to 300 ms. The overtemperature and short circuit current-limiting provide additional protection for the LDO during system fault conditions.

Applications

• High-Speed Driver Chipset Power
• Networking Backplane Cards
• Notebook Computers
• Network Interface Cards
• Palmtop Computers
• Video Graphics Adapters
• 2.5V to 1.XV Regulators

Key features

• 500 mA Output Current Capability
• Input Operating Voltage Range: 2.3V to 6.0V
• Adjustable Output Voltage Range: 0.8V to 5.0V
• 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: 210 mV typical at 500 mA
• Typical Output Voltage Tolerance: 0.5%
• Stable with 1.0 μF Ceramic Output Capacitor
• Fast response to Load Transients
• Low Supply Current: 120 μA (typical)
• Low Shutdown Supply Current: 0.1 μA (typical)
• Adjustable Delay on Power Good Output
• Short Circuit Current Limiting and Overtemperature Protection
• 2x3 DFN-8 and SOIC-8 Package Options