LMZ10504DEMO/NOPB

User's Guide SNVA426B – January 2010 – Revised April 2013 AN-2030 LMZ10503 / LMZ10504 Demo Board SIMPLE SWITCHER® Power Module Quick Start Guide 1 Introduction The LMZ10503/4 SIMPLE SWITCHER power module is a complete, easy-to-use DC-DC solution capable of driving up to a 4A load with exceptional power conversion efficiency, output voltage accuracy, line and load regulation. The LMZ10503/4 is available in an innovative package that enhances thermal performance and allows for hand or machine soldering. The LMZ10503/4 can accept an input voltage rail between 2.95V and 5.5V and deliver an adjustable and highly accurate output voltage as low as 0.8V. One megahertz fixed frequency PWM switching provides a predictable EMI characteristic. Two external compensation components can be adjusted to set the fastest response time, while allowing the option to use ceramic and/or electrolytic output capacitors. Externally programmable soft-start capacitor facilitates controlled startup. The LMZ10503/4 is a reliable and robust solution with the following features: lossless cycle-by-cycle peak current limit to protect for over current or short-circuit fault, thermal shutdown, input under-voltage lock-out, and pre-biased startup. 2 Packaging Highlights • • • • 3 Single exposed pad and standard pin out for easy mounting and manufacturing 10.2 x 13.8 x 4.6 mm (0.4 x 0.39 x 0.18 in) package 20W maximum total output power 1.7” x 2.3” (4.3 cm x 5.8 cm) reduced size demo board form factor Demo Board Features • • • • • • • • • • • • • • • Power input voltage range 2.95V-5.5V Input UVLO at 2.7V Adjustable output voltage range 0.8V to 5V Up to 4A output current (LMZ10504) Up to 3A output current (LMZ10503) Integrated shielded inductor in module Efficiency up to 96% at 1A load All ceramic capacitor design Partial compensation allows adjustment of the control loop Starts into pre-biased loads ±1.63% maximum feedback voltage accuracy over temperature ±2.5% maximum feedback voltage accuracy over full line, load, and temperature conditions Thermal Shutdown Only 9 external passives plus module Two layer low cost assembly SIMPLE SWITCHER is a registered trademark of Texas Instruments. All other trademarks are the property of their respective owners. SNVA426B – January 2010 – Revised April 2013 Submit Documentation Feedback AN-2030 LMZ10503 / LMZ10504 Demo Board SIMPLE SWITCHER® Power Module Quick Start Guide Copyright © 2010–2013, Texas Instruments Incorporated 1 Typical Applications 4 www.ti.com Typical Applications • • • • • • Point-of-load conversions from 3.3V and 5V rails Space constrained applications Extreme temperatures/no air flow environments Noise sensitive applications (i.e. transceiver, medical) Industrial controls Networking equipment Figure 1. Top Layer Figure 2. Bottom Layer Table 1. Absolute Maximum Module Ratings 2 VIN to GND -0.3V to 6V EN, FB, SS to GND -0.3V to 6V AN-2030 LMZ10503 / LMZ10504 Demo Board SIMPLE SWITCHER® Power Module Quick Start Guide SNVA426B – January 2010 – Revised April 2013 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Demo Board Schematic www.ti.com Table 2. Module Operating Ratings VIN 2.95V to 5.5V Junction Temperature Range (TJ) -40°C to +125°C Table 3. Demo Board Operating Ratings 5 VIN 2.95V to 5.5V VOUT 2.5V IOUT 0A to 4A or 0A to 3A Softstart time 4 ms Operating Ambient Temperature Range (TA) - 40°C to +94°C (at full 4A load) θJA 30°C/W θJC 1.9°C/W Board Dimensions 1.7 x 2.3 (4.3 cm x 5.8 cm) Number of Layers 2 Demo Board Schematic Table 4. Demo Board Bill of Materials (1) Ref Des Description Case Size Manufacturer Manufacturer P/N Quantity U1 SIMPLE SWITCHER TO-PMOD Texas Instruments LMZ10503/4 1 Cin1, Co1, Co2 47 µF, X5R, 16V 1206 TDK C3216X5R1C476M 3 Cin2 220 µF, 10V, AL-Elec E Panasonic EEE-FPA221XAP 0 (1) Ccomp 120 pF, 5%, C0G, 50V 0603 TDK C1608C0G1H121J 1 Css 10 nF, 5%, C0G, 25V 0603 TDK C1608C0G1E103J 1 Rfbt 75 kΩ 0603 Vishay Dale CRCW060375K0FKEA 1 Rfbb 34.8 kΩ 0603 Vishay Dale CRCW060334K8FKEA 1 Rcomp 1.1 kΩ 0603 Vishay Dale CRCW06031K10FKEA 1 Ren 100 kΩ 0603 Vishay Dale CRCW0603100KFKEA 1 VIN, GND, VOUT Turret Terminal 1502-2 Keystone 1502-2K-ND 4 EN, SS Turret Terminal 1593-2 Keystone 1593-2K-ND 2 Not installed SNVA426B – January 2010 – Revised April 2013 Submit Documentation Feedback AN-2030 LMZ10503 / LMZ10504 Demo Board SIMPLE SWITCHER® Power Module Quick Start Guide Copyright © 2010–2013, Texas Instruments Incorporated 3 Demo Board Hookup www.ti.com Table 5. Output Voltage Setting (Rfbt = 75 kΩ) 6 VOUT Rfbb 3.3 V 23.7 kΩ 2.5 V 34.8 kΩ 1.8 V 59 kΩ 1.5 V 84.5 kΩ 1.2 V 150 kΩ 0.9 V 590 kΩ Demo Board Hookup VOUT Connect the load to VOUT and one of the GND posts. The module can source up to a 3A or 4A load current, depending on the module installed. VIN Connect VIN to a positive voltage in the 2.95 to 5.5V range. Connect the negative terminal of the source supply to one of the posts labeled GND. EN The enable is configured with a 100 kΩ pull up resistor, which enables the LMZ10503/4, but also allows the user to disable the LMZ10503/4, by pulling low on the EN post. Quiescent current If the enable post is pulled low, the module will be disabled and about 260 µA of supply current will flow into VIN (pin 1). To enable the device, leave the enable post open, there will be approximately 12 mA of no-load quiescent current into the VIN post. (VIN to ground voltage at the post set to 3.3V). 7 Demo Board Passive Components Soft-start capacitor The soft-start capacitor controls the rise time of the output voltage when power is first applied and following the clearing of a fault mode. Feedback divider Regulator output voltage is programmed though the selection of the two resistors, Rfbb and Rfbt. Ccomp Rcomp is located in parallel with the upper feedback divider resistor, Rfbt. These components adjust the control loop and will improve the step response to abrupt changes in load current and input voltage. Output Capacitor Parallel connections of two 47 µF 6.3V multilayer ceramic are used for the output capacitor. Input Capacitor A 47 µF 16V multilayer ceramic (Cin1) supplies the fast switching current generated from the quick rise time of the internal MOSFET. Cin1 is also the energy reservoir for the input line. Additionally, Cin2 is not installed, but is a placeholder for an aluminum capacitor to reduce the resonance of the input line produced by the inductance and resistance in the cables connecting the bench power supply to the evaluation board and the input capacitors. 8 Performance Characteristics The following curves apply to the LMZ10504 demo board. 4 AN-2030 LMZ10503 / LMZ10504 Demo Board SIMPLE SWITCHER® Power Module Quick Start Guide SNVA426B – January 2010 – Revised April 2013 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Performance Characteristics www.ti.com Figure 3. Efficiency, V OUT = 2.5V, T AMB = 25°C Figure 4. Current Derating V OUT = 3.3V, V OUT = 2.5V, θ JA = 30°C/W Figure 5. Load Transient Response V OUT = 5V, VOUT = 2.5V, I OUT = 0.4A to 3.6A step 20 mV/DIV, 20 MHz Bandwidth Limited SNVA426B – January 2010 – Revised April 2013 Submit Documentation Feedback AN-2030 LMZ10503 / LMZ10504 Demo Board SIMPLE SWITCHER® Power Module Quick Start Guide Copyright © 2010–2013, Texas Instruments Incorporated 5 Performance Characteristics www.ti.com Figure 6. Output Voltage Ripple V OUT = 3.3V, V OUT= 2.5V, I OUT = 4A, 20 mV/DIV Figure 7. Current Derating V IN = 5.0V, V OUT = 2.5V, θ JA = 30°C/W Figure 8. Output Voltage Ripple V IN = 5V, V OUT = 2.5V, I OUT = 4A, 20 mV/DIV 6 AN-2030 LMZ10503 / LMZ10504 Demo Board SIMPLE SWITCHER® Power Module Quick Start Guide SNVA426B – January 2010 – Revised April 2013 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Performance Characteristics www.ti.com Figure 9. Load Transient Response V IN = 3.3V, V OUT= 2.5V , I OUT = 0.4A to 3.6A step 20 mV/DIV, 20 MHz Bandwidth Limited SNVA426B – January 2010 – Revised April 2013 Submit Documentation Feedback AN-2030 LMZ10503 / LMZ10504 Demo Board SIMPLE SWITCHER® Power Module Quick Start Guide Copyright © 2010–2013, Texas Instruments Incorporated 7 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. 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