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RT9267PC Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9267PC Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 9 page  RT9267 Preliminary 1 DS9267-08 March 2007 www.richtek.com Features Two Channels of Adaptive PWM Controllers One Channel of Low Dropout Regulator One Voltage Detector Low Start-Up Voltage 1.0V Low Quiescent Current 40 μμμμμA for the Whole IC High Switching Rate 550kHz Built-In 2A Switching NMOS Two Separated Chip Enable Control Pins 2% Accuracy for All Channels Minimized External Components Small TSSOP-16 Package RoHS Compliant and 100% Lead (Pb)-Free Pin Configurations Applications PDA Portable Instrument Wireless Equipment DSC LCD Back Bias Circuit RF-Tags High Efficiency, Low Quiescent, Triple Output DC-DC Converter Ordering Information General Description The RT9267 is a triple output DC-DC converter IC including two adaptive PWM controllers, one low dropout regulator, and one voltage detector. RT9267 is capable of delivering hundreds of mA output current and consumes only 40 μA quiescent current for the whole IC. The adaptive PWM controllers are configured for boost applications with built-in 2A NMOS for each channel. The proprietary adaptive PWM loop provides PWM operation for heavier output loading conditions and PFM for lighter loading, with seamless auto-transition. The 550kHz switching rate reduces the size of external passive components. The low dropout linear regulator (LDO) is designed with a built-in 300mA PMOS, providing 1mV/mA low dropout voltage with respect to variant output current values. The voltage detector provides the supervisory function with open collector pull-low output. All the 4 function units are adjustable, and each can be set with two resistors in divider connection. The reference voltage for each channel is set to 1.25V for the two adaptive PWM controllers, and 0.86V for the LDO and the voltage detector. The RT9267 is in TSSOP 16 pin package which fits space- limited hand held devices well. (TOP VIEW) TSSOP-16 4 2 3 5 7 6 8 13 15 14 12 10 11 9 16 LX1 EN1 GND EN2 NC LX2 NC GND LBO LBI FB2 LDOO NC LFB FB1 VDD Note : RichTek Pb-free and Green products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. 100%matte tin (Sn) plating. RT9267 Package Type C : TSSOP-16 Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- cial Standard) |
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