DatasheetsPDF.com

MAX1635 Dataheets PDF



Part Number MAX1635
Manufacturers Maxim
Logo Maxim
Description Multi-Output / Low-Noise Power-Supply Controllers
Datasheet MAX1635 DatasheetMAX1635 Datasheet (PDF)

19-0480; Rev 3; 4/97 KIT ATION EVALU LE B A IL A AV Multi-Output, Low-Noise Power-Supply Controllers for Notebook Computers ____________________________Features o o o o o o o o o o o o o o o o o 96% Efficiency +4.2V to +30V Input Range 2.5V to 5.5V Dual Adjustable Outputs Selectable 3.3V and 5V Fixed or Adjustable Outputs (Dual Mode™) 12V Linear Regulator Adjustable Secondary Feedback (MAX1631/MAX1634) 5V/50mA Linear Regulator Output Precision 2.5V Reference Output Programmable Power-Up Sequen.

  MAX1635   MAX1635



Document
19-0480; Rev 3; 4/97 KIT ATION EVALU LE B A IL A AV Multi-Output, Low-Noise Power-Supply Controllers for Notebook Computers ____________________________Features o o o o o o o o o o o o o o o o o 96% Efficiency +4.2V to +30V Input Range 2.5V to 5.5V Dual Adjustable Outputs Selectable 3.3V and 5V Fixed or Adjustable Outputs (Dual Mode™) 12V Linear Regulator Adjustable Secondary Feedback (MAX1631/MAX1634) 5V/50mA Linear Regulator Output Precision 2.5V Reference Output Programmable Power-Up Sequencing Power-Good (RESET) Output Output Overvoltage Protection (MAX1630/MAX1631/MAX1632) Output Undervoltage Shutdown (MAX1630/MAX1631/MAX1632) 200kHz/300kHz Low-Noise, Fixed-Frequency Operation Low-Dropout, 99% Duty-Factor Operation 2.5mW Typical Quiescent Power (+12V input, both SMPSs on) 4µA Typical Shutdown Current 28-Pin SSOP Package ________________General Description The MAX1630–MAX1635 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 onboard power-up sequencing, power-good signaling with delay, digital soft-start, secondary winding control, lowdropout circuitry, internal frequency-compensation networks, and automatic bootstrapping. Up to 96% 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 systemsuspend or standby mode. Excellent dynamic response corrects output load transients caused by the latest dynamic-clock CPUs within five 300kHz 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 SKIP pin enables fixed-frequency mode, for lowest noise under all load conditions. The MAX1630–MAX1635 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 MAX1630/MAX1632/MAX1633/ MAX1635 each contain 12V/120mA linear regulators. The MAX1631/MAX1634 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 MAX1630/MAX1631/MAX1632 contain internal output overvoltage and undervoltage protection features. MAX1630–MAX1635 _______________Ordering Information PART MAX1630CAI MAX1630EAI TEMP. RANGE 0°C to +70°C -40°C to +85°C PIN-PACKAGE 28 SSOP 28 SSOP Ordering Information continued on last page. ________________Functi.


MAX1634 MAX1635 MAX1636


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)