MAX887100% Duty Cycle, Low-Noise, Step-Down, PWM DC-DC Converter | Voltage Regulators - Linear, Low Drop Out (LDO) Regulators | 3 | Active | The MAX887 high-efficiency, step-down DC-DC converter provides an adjustable output from 1.25V to 10.5V. It accepts inputs from 3.5V to 11V and delivers 600mA. Operation to 100% duty cycle minimizes dropout voltage (300mV typ at 500mA). Synchronous rectification reduces output rectifier losses, resulting in efficiency as high as 95%.Fixed-frequency pulse-width modulation (PWM) reduces noise in sensitive communications applications. Using a high-frequency internal oscillator allows tiny surface-mount components to reduce PC board area, and eliminates audio-frequency interference. A SYNC input allows synchronization to an external clock to avoid interference with sensitive RF and data-acquisition circuits.The MAX887 features current-mode operation for superior load/line-transient response. Cycle-by-cycle current limiting protects the internal MOSFET and rectifier. A low-current (2.5µA typ) shutdown mode conserves battery life.ApplicationsCell PhonesComputer PeripheralsDistributed Power SystemsPersonal CommunicatorsPortable Instrumentation |
| Voltage Regulators - Linear, Low Drop Out (LDO) Regulators | 3 | Active | |
| Power Management (PMIC) | 3 | Active | |
| Voltage Regulators - Linear, Low Drop Out (LDO) Regulators | 10 | Active | |
MAX8877Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout | Power Management (PMIC) | 31 | Active | The MAX8877/MAX8878 low-noise, low-dropout linear regulators operate from a 2.5V to 6.5V input and deliver up to 150mA. These devices are pin-compatible with the industry-standard '2982 and offer an improved dropout voltage. Typical output noise is 30µVRMS, and typical dropout is only 165mV at 150mA. The output voltage is preset to voltages in the range of 1.5V to 5.0V, in 100mV increments.Designed with an internal P-channel MOSFET pass transistor, the MAX8877/MAX8878 maintain a low 100µA supply current, independent of the load current and dropout voltage. Other features include a 10nA logic-controlled shutdown mode, short-circuit and thermal-shutdown protection, and reverse battery protection. The MAX8878 also includes an auto-discharge function, which actively discharges the output voltage to ground when the device is placed in shutdown. Both devices come in regular and thin 5-pin SOT23 package.ApplicationsAudio SystemsCordless PhonesElectronic PlannersHandheld Instruments (PDAs, Palmtops)ModemsPalmtop ComputersPCMCIA CardsPCS Telephones |
| Power Management (PMIC) | 28 | Active | |
| LED Drivers | 1 | Obsolete | |
| Integrated Circuits (ICs) | 1 | Active | |
MAX888012V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK | Voltage Regulators - Linear, Low Drop Out (LDO) Regulators | 5 | Active | The MAX8880/MAX8881 are ultra-low supply current, low-dropout linear regulators, capable of delivering up to 200mA. They are designed for battery-powered applications where reverse battery protection and long battery life are critical.These regulators' low 3.5µA supply current extends battery life in applications with long standby periods. Unlike PNP-based designs, a 2Ω PMOS device maintains ultra-low supply current throughout the entire operating range and in dropout. The parts are internally protected from output short circuits, reverse battery connection, and thermal overload. An internal power-OK (POK) comparator indicates when the output is out of regulation.The MAX8880 output is adjustable from 1.25V to 5V using an external resistor-divider. The MAX8881 provides only factory-preset output voltages of 1.8V, 2.5V, 3.3V, or 5V (seeOrdering Informationin the full data sheet). The devices are available in 6-pin SOT23 and 6-pin TDFN packages.ApplicationsBattery-Powered AlarmsCMOS Backup PowerHandy TerminalsPDAsReal-Time ClocksRemote TransmittersSmart Battery Packs/ChargersSmoke Detectors |
MAX888112V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK | Integrated Circuits (ICs) | 9 | Active | The MAX8880/MAX8881 are ultra-low supply current, low-dropout linear regulators, capable of delivering up to 200mA. They are designed for battery-powered applications where reverse battery protection and long battery life are critical.These regulators' low 3.5µA supply current extends battery life in applications with long standby periods. Unlike PNP-based designs, a 2Ω PMOS device maintains ultra-low supply current throughout the entire operating range and in dropout. The parts are internally protected from output short circuits, reverse battery connection, and thermal overload. An internal power-OK (POK) comparator indicates when the output is out of regulation.The MAX8880 output is adjustable from 1.25V to 5V using an external resistor-divider. The MAX8881 provides only factory-preset output voltages of 1.8V, 2.5V, 3.3V, or 5V (seeOrdering Informationin the full data sheet). The devices are available in 6-pin SOT23 and 6-pin TDFN packages.ApplicationsBattery-Powered AlarmsCMOS Backup PowerHandy TerminalsPDAsReal-Time ClocksRemote TransmittersSmart Battery Packs/ChargersSmoke Detectors |
