MAX1901, MAX1902, MAX1904 500kHz Multi-Output, Low-Noise Power-Supply Controllers For Notebook Computers

The MAX1901 MAX1902 MAX1904 are buck-topology, Step-down switch-mode, power-supply controllers that generate logic-supply voltages in battery-powered systems. These high-performance, dual/triple-output devices include on-board power-up sequencing, power-good signaling with delay, digital soft-start, secondary winding control, low dropout circuitry, internal frequency-compensation networks, and Automatic bootstrapping.
Up to 97% efficiency is achieved through synchronous rectification and Maxim's proprietary Idle Mode control scheme. Efficiency is greater than 80% over a 1000:1 load-current range, which extends battery life in system suspend or standby mode. Excellent dynamic response corrects output load transients within five Clock cycles. Strong 1A on-board Gate drivers ensure fast external N-Channel MOSFET switching.
These devices feature a logic-controlled and synchronizable, fixed-frequency, pulse-width modulation (PWM) operating mode. This reduces noise and RF interference in sensitive mobile Communications and pen-entry applications. Asserting the active-low SKIP pin enables fixed-frequency mode, for lowest noise under all load conditions.
The MAX1901 MAX1902 MAX1904 include two PWM Regulators adjustable from 2.5V to 5.5V with fixed 5.0V and 3.3V modes. All these devices include secondary feedback regulation, and the MAX1902 contains a 12V/120mA linear Regulator The MAX1901 MAX1904 include a secondary feedback input (SECFB), plus a control pin (STEER) that selects which PWM (3.3V or 5V) receives the secondary feedback signal. SECFB provides a method for adjusting the secondary winding voltage regulation point with an external resistor divider, and is intended to aid in creating auxiliary voltages other than fixed 12V.
The MAX1901 MAX1902 contain internal output overvoltage and undervoltage protection features.
By Maxim Integrated Products
Part Manufacturer Description Datasheet Samples
MAX1904EAI+ Maxim Integrated Products Dual Switching Controller, Current-mode, 0.2A, 550kHz Switching Freq-Max, BICMOS, PDSO28, 5.30 MM, MO-150, SSOP-28
MAX1904BEAI+T Maxim Integrated Products Dual Switching Controller,
MAX1904EAI+T Maxim Integrated Products Dual Switching Controller, Current-mode, 0.2A, 550kHz Switching Freq-Max, BICMOS, PDSO28, 5.30 MM, MO-150, SSOP-28
MAX1904EAI-T Maxim Integrated Products Dual Switching Controller, Current-mode, 0.2A, 550kHz Switching Freq-Max, BICMOS, PDSO28, 5.30 MM, MO-150, SSOP-28
MAX1904ETJ+ Maxim Integrated Products Dual Switching Controller, Current-mode, 0.2A, 550kHz Switching Freq-Max, BICMOS, 5 X 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32
MAX1904ETJ+T Maxim Integrated Products Dual Switching Controller, Current-mode, 0.2A, 550kHz Switching Freq-Max, BICMOS, 5 X 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32
MAX1904ETJ-T Maxim Integrated Products Dual Switching Controller, Current-mode, 0.2A, 550kHz Switching Freq-Max, BICMOS, 5 X 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32
MAX1904ETJ Maxim Integrated Products Dual Switching Controller, Current-mode, 0.2A, 550kHz Switching Freq-Max, BICMOS, 5 X 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32
MAX1904EAI Maxim Integrated Products Dual Switching Controller, Current-mode, 0.2A, 550kHz Switching Freq-Max, BICMOS, PDSO28, 5.30 MM, MO-150, SSOP-28
MAX1904BEAI+ Maxim Integrated Products Dual Switching Controller,
MAX1904 's PackagesMAX1904 's pdf datasheet
MAX1904EAI-T SSOP
MAX1904EAI SSOP
MAX1904EAIT SSOP
MAX1904ETJ-T QFN
MAX1904ETJ QFN
MAX1904ETJT QFN




MAX1904 Pinout, Pinouts
MAX1904 pinout,Pin out
This is one package pinout of MAX1904,If you need more pinouts please download MAX1904's pdf datasheet.

MAX1904 Application circuits
MAX1904 circuits
This is one application circuit of MAX1904,If you need more circuits,please download MAX1904's pdf datasheet.


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