MC33680FTB ,Dual DC-DC Regulator for Electronic Organizer3MC33680PIN FUNCTION DESCRIPTION PinNo. Function Type/Direction DescriptionÁÁÁÁÁÁÁÁÁÁ VMAINFBÁÁÁÁÁ ..
MC33689DWB ,System Basis Chip with LIN transceiverMAXIMUM RATINGSRatings Symbol Min Typ Max UnitELECTRICAL RATINGSSupply Voltage at Vs1 and Vs2 V- Co ..
MC33690DW ,STANDALONE TAG READER CIRCUITMOTOROLAOrder this documentSEMICONDUCTOR TECHNICAL by MC33690/DMC33690Standalone Tag Reader Circuit ..
MC3370P ,Zero Voltage Switchfeatures include;(1) a built-in voltage regulator that allows direct ac line operation,(2) a differ ..
MC3371 ,Low Power Narrowband FM IF (revA)MAXIMUM RATINGSDTB SUFFIXRating Pin Symbol Value UnitPLASTIC PACKAGEPower Supply Voltage 4 V (max) ..
MC3371D ,LOW POWER FM IFMAXIMUM RATINGSDTB SUFFIXRating Pin Symbol Value UnitPLASTIC PACKAGEPower Supply Voltage 4 V (max) ..
MC74HC574ANG , Octal 3−State Noninverting D Flip−Flop High−Performance Silicon−Gate CMOS
MC74HC589A ,8/Bit Shift RegisterELECTRICAL CHARACTERISTICS (Voltages Referenced to GND, Note 7)V Guaranteed LimitCCSymbol Parameter ..
MC74HC589ADTR2 ,8/Bit Shift RegisterFeaturesSOIC−16HC589AD SUFFIX• Output Drive Capability: 15 LSTTL Loads16AWLYWWCASE 751B1• Outputs D ..
MC74HC589AFEL ,8/Bit Shift RegisterMAXIMUM RATINGSSymbol Parameter Value UnitV DC Supply Voltage (Referenced to GND) 0.5 to 7.0 VCCV ..
MC74HC589AFEL ,8/Bit Shift RegisterMaximum ratings applied to the device are individual stress limitvalues (not normal operating condi ..
MC74HC589AN ,8-Bit Serial or Parallel-Input/Serial-Output Shift Register with 3-State Output
MC33680FTB
Dual DC-DC Regulator for Electronic Organizer
----The MC33680 is a dual DC–DC regulator designed for electronic
organizer applications. Both regulators apply
Pulse–Frequency–Modulation (PFM). The main step–up regulator
output can be externally adjusted from 2.7V to 5V. An internal
synchronous rectifier is used to ensure high efficiency (achieve 87%).
The auxiliary regulator with a built–in power transistor can be
configured to produce a wide range of positive voltage (can be used
for LCD contrast voltage). This voltage can be adjusted from +5V to
+25V by an external potentiometer.
The MC33680 has been designed for battery powered hand–held
products. With the low start–up voltage from 1V and the low quiescent
current (typical 35 μA); the MC33680 is best suited to operate from 1
to 2 AA/ AAA cell. Moreover, supervisory functions such as low
battery detection, CPU Power–Good signal, and back–up battery
control, for lithium battery or supercap are also included in the chip.
FEATURES: Low Input Voltage, 1V up Low Quiescent Current in Standby Mode: 35μA typical PFM and Synchronous Rectification to ensure high efficiency
(87% @60mA Load) Adjustable Main Output: +2.7V to +5V
nominal 3.3V @ 100mA max, with 1.8V input Auxiliary Output Voltage: +5V to +25V
+5V @ 25mA max, with 1.8V input
+25V @ 15mA max, with 1.8V input Current Limit Protection Power–Good Signal with Programmable Delay Battery Low Detection Lithium Battery or Supercap Back–up 32–Pin LQFP Package
APPLICATIONS: Digital Organizer and Dictionary Dual Output Power Supply (For MPU, Logic, Memory, LCD) Handheld Battery Powered Device (1–2 AA/AAA cell)
