A MHz, 600mA S YNCHRONOUS STEP-DOWN CONVERTER. Thermal Resistance. Top View. Ordering Information. θ JC. θ JA. Part Number A7106E5-Adj

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1 Description Features The is a 1.5MHz constant frequency, slope compensated current mode PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency without an external shottky diode. It is ideal for powering portable equipment that runs from a single cell lithium-lon (Li+) battery. The can also run at 100% duty cycle for low dropout operation, extending better life in portable system. Idle mode operation at light loads provides very low output ripple voltage for noise sensitive applications. Pin Assignment 1.5MHz constant switching frequency High efficiency, Up to 96% 600mA output current at V IN =3V No schottky diode required 2.5V to 5.5V input voltage range Output voltage as low as 0.6V 100% duty cycle in dropout Low quiescent current: 270uA Short circuit protection Thermal fault protection <1uA shutdown current Space saving 5-pin thin SOT-25 package Applications Fixed Output Adjustable Output Cellular and Smart Phones Wireless and DSL Modems Run V OUT Run V FB PDAs GND GND MP3 Player SW V IN SW V IN Digital Still and Video Cameras Portable Instruments Top View Microprocessors and DSP Core Supplies Ordering Information Thermal Resistance Part Number E5-Adj Package SOT o C/W 110 o C/W E5-1.5 Thermal Resistance is specified with E5-1.8 Note: approximately 1 square of 1oz copper E5-1.2 θ JA θ JC E5 Note: SOT-25 Package PN: E5 AiT provides all lead free parts E5 Package provide in Tape & Reel Advanced Innovation Technology Corp. PAGE 1/10

2 Pin Description PIN Name Function 1 RUN 2 GND 3 SW 4 IN Regulator Enable control input. Drive RUN above 1.5V to turn on the part. Drive RUN below 0.3V to turn it off. In shutdown, all functions are disabled drawing<1ua supply current. Do NOT leave RUN floating. Ground Power Switch Output. It is the Switch note connection to inductor, This pin connects to the drains of the internal P-CH and N-CH MOSFET switches. Supply Input Pin. Must be closely decoupled to GND, Pin2, with a 2.2uF or greater ceramic capacitor. V FB (E5-adj): Feedback Input Pin. Connect FB to the center point of the external resistor driver. The feedback threshold voltage is 0.6V. 5 V FB /V OUT V OUT (E5-1.2/1.5/1.8). Output Voltage Feedback Pin. An internal resistive divider devides the output voltage down for comparison to the internal reference voltage. Advanced Innovation Technology Corp. PAGE 2/10

3 YNCHRONOUS Typical Application Figure 1. Basic application circuit with adjustable output, V OUT =1.8V Absolute Maximum Ratings (Note1) Input Supply Voltage -0.3V to +6V RUN, V FB Voltage SW, V OUT Voltage -0.3V to V IN +0.3V -0.3V to V IN +0.3V Peak SW Sink and Source Current 1.5A Operating Temperature Range -40 o C to +85 o C Junction Temperature (Note2) +125 o C Storage Temperature Range Lead Temperature (Soldering, 10s) -60 o C to +150 o C +300 o C Note 1 Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2 T J is calculated from the ambient temperature T A and power dissipation P D according to the following formula: T J =T A +P D x θ JA Advanced Innovation Technology Corp. PAGE 3/10

4 Electrical Characteristics (Note3) V IN =V RUN =3.6V, T A =25 o C, Test Circuit Figure 1, unless otherwise noted Parameter Conditions Min Typ Max Unit Input Voltage Range V Input DC Supply Current Active Mode V FB =0.5V ua Shutdown Mode V FB =0V, V IN =4.2V T A =+25 o C Regulated Feedback Voltage T A =0 o C T A 85 o C V T A =-40 o C T A 85 o C V FB Input Bias Current V FB =0.65V ±30 na Reference Voltage Line V IN =2.5V to 5.5V Regulation V OUT =V FB (R2=0) ma -1.2E Regulated Output Voltage -1.5E V -1.8E Output Voltage Line Regulation V IN =2.5V to 5.5V I OUT =10mA %/V Output Voltage Load Regulation I OUT from 0 to 600mA %/ma Maximum Output Current V IN =3.0V 600 ma Oscillator Frequency V FB =0.6V or V OUT =100% MHz R DS(ON) of P-CH MOSFET I SW =300mA Ω R DS(ON) of N-CH MOSFET I SW = - 300mA Ω Peak Inductor Current SW Leakage Output over voltage lockout V FB =0.5V or V OUT =90% V IN =3V, Duty Cycle<35% V RUN =0V, V SW =0V or 5V V IN =5V V OVL =V OVL -V FB 1.2 ± ±1 A ua mv RUN Threshold RUN Leakage Current -40 o C T A 85 o C V ±0.1 ±1 ua Note3: 100% production test at +25 o C. Specifications over the temperature range are guaranteed by design and characterization Advanced Innovation Technology Corp. PAGE 4/10

5 Typical Performance Characteristics Test Figure 1 above unless otherwise specified Advanced Innovation Technology Corp. PAGE 5/10

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8 Block Diagram * For Adjustable output R1+R2 is external Figure 2. Block Diagram Advanced Innovation Technology Corp. PAGE 8/10

9 Mechanical Dimensions of SOT-25 package Outline Dimensions (All Dimensions in mm) Dimension Min Max A A B C Dimension H E e 0.95 REF. E REF L L Q 0 o 10 o Advanced Innovation Technology Corp. PAGE 9/10

10 IMPORTANT NOTICE Advanced Innovation Technology Corp. (AiT) reserves the right to make changes to any its product, specifications, to discountinue any integrated circuit product or service wthout notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. Advanced Innovation Technology Corp.'s integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT products in such applications is understood to be fully at the risk of the customer. As used herein may involve potential risks of death, personal injury, or servere property, or environmental damage. In order to minimize risks associated with the customer's appliations, the customer should provide adequate design and operating safeguards. Advanced Innovation Technology Corp. assumes to no liability to customer product design or application support. AiT warrants the performance of its products ot the specifications applicable at the time of sale. Advanced Innovation Technology Corp. PAGE 10/10