MAX887 PDF File ( Datasheet )

19-1142 Rev 0; 9, 96 ANUAL N KIT M IO T A U EVAL BLE AVAILA 100% Duty Cycle, Low-Noise, Step-Down, PWM DC-DC Converter ____________________________Features o 95% Efficiency o 600mA Output Current o Cycle-by-Cycle Current Limiting o Low-Dropout, 100% Duty-Cycle Operation, 300mV at 500mA o Internal 0.6Ω (typ) MOSFET o Internal Synchronous Rectifier o High-Frequency Current-Mode PWM o External SYNC or Internal 300kH- Oscillator o Guaranteed 260kH- to 340kH- Internal Oscillator Frequency Limits

19-1257; Rev 1; 3, 98 Low-Dropout, 120mA Linear Regulators _______________General Description The MAX8873T, S, R and MAX8874T, S, R low-dropout linear regulators operate from a +2.5V to +6.5V input range and deliver up to 120mA. A PMOS pass transistor allows the low, 82 A supply current to remain independent of load, making these devices ideal for battery-operated portable equipment such as cellular phones and cordless phones. The devices feature Dual Mode™ operation: their output voltage is