CMOS-basedPFMstepupDCConverter.Quiescentcurrentdrawn

一,产品概述(General Description)
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CXSU6337 CXSU6337C series are CMOS-based PFM step-up DC-DC Converter. The converter can

start up by supply voltage as low as 0.8V, and capable of delivering maximum

200mA output current at 3.3V output with 1.8V input Voltage. Quiescent

current drawn from power source is as low as 5.5uA. All of these features make

CXSU6337 series be suitable for the portable devices, which are supplied by a

single battery to four-cell batteries.To reduce the noise caused by the switch

regulator, CXSU6337 is well considerate in circuit design and manufacture,

so that the interferer toother circuits by the device is reduced greatly.

CXSU6337 integrates stable reference circuits and trimming technology, so it

can afford high precision and low temperature-drift coefficient of the output voltage.

CXSU6337 is available in SOT-89-3, SOT-23-3, SOT-23-5 and TO-92 packages,

which is PB free. And in 5-pin packages, such as SOT-23-5, the device can be

switch on or off easily by CE pin, to minimize the standby supply current.

二.产品特点(Features)
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Deliver 200mA at 3.3V Output voltage with 1.8V input Voltage

Low start-up voltage (when the output current is 1mA)-------------0.8V

Output voltage can be adjusted from 2.5V～6.0V (In 0.1V step)

Output voltage accuracy ---------------±2％

Low temperature-drift coefficient of the output voltage-------±100ppm/℃

Only three external components are necessary: An inductor,

a Schottky diode and an output filter capacitor

High power conversion efficiency-----85％

Low quiescent current drawn from power source--------------------<5.5uA

三,应用范围 (Applications)
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Power Source for PDA, DSC, MP3 Player,

Electronic toy and wireless mouse

Power Source for a Single or Dual-cell

Battery-Powered Equipments

Power Source for LED