LMZ20502 www.ti.com SNVS852A – JUNE 2012 – REVISED APRIL 2013 LMZ20502 2A SIMPLE SWITCHER ® Nano Module Check for Samples: LMZ20502 FEATURES PERFORMANCE BENEFITS • • • • • • • • • • • 2 • Integrated inductor Miniature 3.5mm x 3.5mm x 1.7mm package -40°C to 125°C junction temperature range Power good flag function Pin selectable switching modes Adjustable output voltage 3.0MHz Fixed PWM Switching Frequency Internal compensation and soft-start Current limit, thermal shutdown, and UVLO protection Requires only 5 external components • Small solution size Easy component selection and simple PCB layout High efficiency reduces system heat generation 100 95 90 85 Efficiency (%) 1 80 75 70 65 60 ELECTRICAL SPECIFICATIONS 50 • • • • • • 40 0.01 2A maximum load current Input voltage range 2.7V to 5.5V Output voltage range 0.8V to 3.6V ± 1% feedback tolerance over termperature 1 µA (max) quiescent current in shutdown 64 µA (typ) quiescent current 3V 4.2V 5V 45 0.1 1 Output Current (A) 10 C001 Figure 1. Typical Efficiency for Vout = 1.8V DESCRIPTION The LMZ20502 Simple Switcher ® Nano Module regulator is an easy to use synchronous step-down DC-DC converter capable of driving up to 2A of load from an input of up to 5.5V, with exceptional efficiency and output accuracy in a very small solution size. The innovative package contains the regulator and inductor in a small 3.5mm x 3.5mm x 1.9mm volume. Thus saving board space and eliminating the time and expense of inductor selection. The LMZ20502 requires few external components and has a pin out designed for simple, optimum PCB layout. The LMZ20502 is a member of Texas Instruments' SIMPLE SWITCHER ® family. The SIMPLE SWITCHER ® concept provides for an easy to use complete design using a minimum number of external components and the TI WEBENCH ® design tool. TI's WEBENCH ® tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in. 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. is a registered trademark of ~ Texas Instruments. PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. Copyright © 2012–2013, Texas Instruments Incorporated PRODUCT PREVIEW 55 LMZ20502 SNVS852A – JUNE 2012 – REVISED APRIL 2013 www.ti.com Typical Applcation Circuit Figure 2. Typical Application Circuit Connection Diagram PRODUCT PREVIEW Figure 3. Connection Diagram PIN DESCRIPTIONS Pin # NAME TYPE (1) 1 PG O Power good flag; open drain. Connect to logic supply through a resistor. High = power good; Low = power bad 2 EN I Enable input. High = ON, Low = off. Do not float 3 MODE I Mode selection input. HIgh = forced PWM. Low = auto mode selection between PFM and PWM. Do not float. (1) 2 Description 4 FB I Feedback input to controller. Connect to output through feedback divder. 5 VOUT P Regulated output voltage. 6 GND G Ground for all circuitry. reference point for all voltages. 7 NC 8 VIN P Input supply to regulator. Connect a bypass capacitor as close as possible to the VIN pin and GND pin of the module EP EP G Ground and heatsink connection. 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