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MAX1977 Datasheet

Part Number MAX1977
Manufacturers Maxim
Logo Maxim
Description High-Efficiency / Quad Output / Main Power- Supply Controllers for Notebook Computers
Datasheet MAX1977 DatasheetMAX1977 Datasheet (PDF)

19-2187; Rev 1; 9/04 High-Efficiency, Quad Output, Main PowerSupply Controllers for Notebook Computers General Description The MAX1777/MAX1977/MAX1999 dual step-down, switch-mode power-supply (SMPS) controllers generate logic-supply voltages in battery-powered systems. The MAX1777/MAX1977/MAX1999 include two pulse-width modulation (PWM) controllers, adjustable from 2V to 5.5V or fixed at 5V and 3.3V. These devices feature two linear regulators providing 5V and 3.3V always-on outputs. Each linea.

  MAX1977   MAX1977






Part Number MAX19790
Manufacturers Maxim Integrated
Logo Maxim Integrated
Description Analog Voltage Variable Attenuator
Datasheet MAX1977 DatasheetMAX19790 Datasheet (PDF)

MAX19790 19-5165; Rev 0; 3/10 250MHz to 4000MHz Dual, Analog Voltage Variable Attenuator General Description The MAX19790 dual, general-purpose analog voltage variable attenuator (VVA) is designed to interface with 50I systems operating in the 250MHz to 4000MHz frequency range. Each attenuator includes a control circuit that provides 22dB of attenuation range with a linear control slope of 10dB/V. Both attenuators share a common analog control and can be cascaded together to yield 44dB of tot.

  MAX1977   MAX1977







Part Number MAX1979
Manufacturers Maxim Integrated
Logo Maxim Integrated
Description Integrated Temperature Controllers
Datasheet MAX1977 DatasheetMAX1979 Datasheet (PDF)

19-2490; Rev 0; 7/02 EVAALVUAAILTAIOBNLEKIT Integrated Temperature Controllers for Peltier Modules MAX1978/MAX1979 General Description The MAX1978/MAX1979 are the smallest, safest, most accurate complete single-chip temperature controllers for Peltier thermoelectric cooler (TEC) modules. On-chip power FETs and thermal control-loop circuitry minimize external components while maintaining high efficiency. Selectable 500kHz/1MHz switching frequency and a unique ripple-cancellation scheme optimiz.

  MAX1977   MAX1977







Part Number MAX1978
Manufacturers Maxim
Logo Maxim
Description Integrated Temperature Controllers
Datasheet MAX1977 DatasheetMAX1978 Datasheet (PDF)

19-2490; Rev 0; 7/02 KIT ATION EVALU E L B A AVAIL Integrated Temperature Controllers for Peltier Modules General Description Features o Smallest, Safest, Most Accurate Complete Single-Chip Controller o On-Chip Power MOSFETS—No External FETs o Circuit Footprint < 0.93in2 o Circuit Height < 3mm o Temperature Stability to 0.001°C o Integrated Precision Integrator and Chopper Stabilized Op Amps o Accurate, Independent Heating and Cooling Current Limits o Eliminates Surges By Directly Controlling .

  MAX1977   MAX1977







Part Number MAX1976A
Manufacturers Maxim Integrated
Logo Maxim Integrated
Description 300mA LDO Regulators
Datasheet MAX1977 DatasheetMAX1976A Datasheet (PDF)

19-3684; Rev 1; 5/12 MAX1963A/MAX1976A Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN General Description The MAX1963A/MAX1976A low-dropout linear regulators operate from a +1.62V to +3.6V supply and deliver a guaranteed 300mA continuous load current with a low 100mV dropout. The high-accuracy (±0.5%) output voltage is preset to an internally trimmed voltage in the +0.75V to +3.0V range. An active-low, open-drain reset output remains asserted for at least 2.2ms (MAX1963A) .

  MAX1977   MAX1977







High-Efficiency / Quad Output / Main Power- Supply Controllers for Notebook Computers

19-2187; Rev 1; 9/04 High-Efficiency, Quad Output, Main PowerSupply Controllers for Notebook Computers General Description The MAX1777/MAX1977/MAX1999 dual step-down, switch-mode power-supply (SMPS) controllers generate logic-supply voltages in battery-powered systems. The MAX1777/MAX1977/MAX1999 include two pulse-width modulation (PWM) controllers, adjustable from 2V to 5.5V or fixed at 5V and 3.3V. These devices feature two linear regulators providing 5V and 3.3V always-on outputs. Each linear regulator provides up to 100mA output current with automatic linear regulator bootstrapping to the main SMPS outputs. The MAX1777/MAX1977/MAX1999 include on-board power-up sequencing, a power-good (PGOOD) output, digital soft-start, and internal soft-stop output discharge that prevents negative voltages on shutdown. Maxim’s proprietary Quick-PWM™ quick-response, constant on-time PWM control scheme operates without sense resistors and provides 100ns response to load transients while maintaining a relatively constant switching frequency. The unique ultrasonic pulse-skipping mode maintains the switching frequency above 25kHz, which eliminates noise in audio applications. Other features include pulse skipping, which maximizes efficiency in light-load applications, and fixed-frequency PWM mode, which reduces RF interference in sensitive applications. The MAX1777 features a 200kHz/5V and 300kHz/3.3V SMPS for highest efficiency, while the MAX1977 features a 400kHz/5V and 500kHz/3.3V SMPS fo.


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