RT9266GX5 Richtek

RT9266 Tiny Package, High Efficiency, Step-up DC/DC Converter General Description Features zz z zz 1.0V Low Start-up Input Voltage The RT9266 is a compact, high efficiency, and low voltage zz z zz High Supply Capability to Deliver 3.3V 100mA with step-up DC/DC converter with an Adaptive Current Mode 1 Alkaline Cell PWM control loop, includes an error amplifier, ramp zz z zz 17A Quiescent (Switch-off) Supply Current generator, comparator, switch pass element and driver in zz z zz Zero Shutdown Mode Supply Current which providing a stable and high efficient operation over zz z zz 90% Efficiency a wide range of load currents. It operates in stable zz z zz 450kHz Fixed Switching Frequency waveforms without external compensation. zz z zz Providing Flexibility for Using Internal and External The low start-up input voltage below 1V makes RT9266 Power Switches suitable for 1 to 4 battery cells applications of providing zz z zz Small SOT-23-6 & SOT-89-5 Package up to 300mA output current. The 450kHz high switching zz z zz RoHS Compliant and 100% Lead (Pb)-Free rate minimized the size of external components. Besides, the 17A low quiescent current together with high Applications efficiency maintains long battery lifetime. z PDA The output voltage is set with two external resistors. Both z DSC internal 2A switch and driver for driving external power z LCD Panel devices (NMOS or NPN) are provided. z RF-Tags z MP3 Ordering Information z Portable Instrument RT9266 z Wireless Equipment Package Type E : SOT-23-6 Pin Configurations X5 : SOT-89-5 Lead Plating System (TOP VIEW) P : Pb Free G : Green (Halogen Free and Pb Free) GND LX FB VDD LX Note : 5 4 6 5 4 Richtek products are : RoHS compliant and compatible with the current require- 23 1 23 ments of IPC/JEDEC J-STD-020. GND EN EXT Suitable for use in SnPb or Pb-free soldering processes. EN VDD FB SOT-23-6 SOT-89-5 Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS9266-16 June 2013 www.richtek.com 1+ + + + RT9266 Typical Application Circuit L1 D1 V IN C3 3.3 to 10 H 1N5819 100F V OUT 3.3V/5V C2 1F R1 VDD 1.6M/3M EN RT9266 LX C1 EXT GND FB 100F R2 980k/1M Figure 1. RT9266 Typical Application for Portable Instruments 3.1V to 5V for 12V 2.8V to 5V for 9V L1 D1 V IN 4.7H 1N5819 C4 RVDD 100F 100 CVDD 1F Q1 VDD EXT N MOS 12V/9V 300mA EN RT9266 R1 C3 LX 860k/620k 0.1F GND FB C2 C1 R2 1F RM 100uF 100k 0.22 Figure 2. RT9266 High Voltage Applications Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS9266-16 June 2013 2