o Step-Down Converter Dynamically Adjustable Output Voltage from 0.75V to 3.4V (MAX1958) Dynamically Adjustable Output Voltage from 1V to 3.6V (MAX1959) 800mA Guaranteed Output Current 130mV IC Dropout at 600mA Load Low Quiescent Current 190µA (typ) in Skip Mode (MAX1958) 3mA (typ) in PWM Mode 0.1µA (typ) in Shutdown Mode 1MHz Fixed-Frequency PWM operation 16% to 100% Duty-Cycle Operation No External Schottky Diode Required Soft-Start o Operational Amplifier 5mA Rail-to-Rail Output Active Discha.
(MAX1958 / MAX1959) W-CDMA/N-CDMA Cellular Phone HBT PA Management ICs
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19-2659; Rev 0; 10/02
KIT ATION EVALU E L B A IL AVA
W-CDMA/N-CDMA Cellular Phone HBT PA Management ICs
General Description Features
o Step-Down Converter Dynamically Adjustable Output Voltage from 0.75V to 3.4V (MAX1958) Dynamically Adjustable Output Voltage from 1V to 3.6V (MAX1959) 800mA Guaranteed Output Current 130mV IC Dropout at 600mA Load Low Quiescent Current 190µA (typ) in Skip Mode (MAX1958) 3mA (typ) in PWM Mode 0.1µA (typ) in Shutdown Mode 1MHz Fixed-Frequency PWM operation 16% to 100% Duty-Cycle Operation No External Schottky Diode Required Soft-Start o Operational Amplifier 5mA Rail-to-Rail Output Active Discharge in Shutdown 800kHz Gain-Bandwidth Product 120dB Open-Loop Voltage Gain (RL = 100kΩ) o Temperature Sensor Accurate Sensor -11.
MAX1958 Datasheet
