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User's Guide

SNVA479B–April 2011–Revised April 2013

AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board

1 Introduction

The LMZ13610/8/6 and LMZ12010/8/6 SIMPLE SWITCHER

power modules are easy-to-use DC-DC

solution capable of driving up to a 10, 8 or 6 ampere load. They are available in an innovative package

that enhances thermal performance and allows for hand or machine soldering. The LMZ13610/8/6 can

accept an input voltage rail between 6V and 36V and the LMZ12010/8/6 can accept an input voltage rail

between 6V and 20V.

The demo board is highly configurable. The output voltage can be adjusted to 5V, 3.3V, 2.5V or 1.2V with

a jumper change. The external soft-start capacitor facilitates a controlled and adjustable startup rise time

of the output. The input voltage UVLO can also be adjusted by changing one resistor.

The LMZ13610 and LMZ12010 family is a reliable and robust solution with the following features: loss-less

cycle-by-cycle valley current limit to protect for over current or short-circuit fault, thermal shutdown, input

under-voltage lockout, and will start up into a pre-biased output.

2 Board Specifications

• V

= 6V to 36V (LMZ13610/8/6)

• V

= 6V to 20V (LMZ12010/8/6)

• V

OUT

= 1.2V, 2.5V, 3.3V or 5V (minimum input voltage of 7V required for 5V output)

• I

OUT

= 0 to 10, 8, or 6 Amps

• θ

= 9.9 °C / W, θ

= 1.0 °C/W

• Designed on four layers; Inner are 1 oz copper; Outer are 2 oz copper.

• Measures 2.95" × 3.54" (75 mm × 90 mm) and is 62 mils (1.57 mm) thick of FR4 laminate material

For additional circuit considerations, including additional output voltage options, refer to the Applications

Section of the LMZ13610/8/6 or LMZ12010/8/6 data sheets. For negative output voltage connections, see

AN-2027 Inverting Application for the LMZ14203 SIMPLE SWITCHER Power Module Application Report

(SNVA425).

SIMPLE SWITCHER is a registered trademark of Texas Instruments.

All other trademarks are the property of their respective owners.

SNVA479B–April 2011–Revised April 2013 AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board

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Summary of content (11 pages)

PAGE 1
User's Guide SNVA479B – April 2011 – Revised April 2013 AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board 1 Introduction The LMZ13610/8/6 and LMZ12010/8/6 SIMPLE SWITCHER® power modules are easy-to-use DC-DC solution capable of driving up to a 10, 8 or 6 ampere load. They are available in an innovative package that enhances thermal performance and allows for hand or machine soldering.
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Board Specifications www.ti.com CIN6 (OPT) + CIN2,3,4 CIN5 (OPT) VOUT SS FB PGND AGND VIN EN VIN LMZ Module VOUT RENT CIN1 CO3,4 (OPT) CO1 CSS CO2 (OPT) (OPT) RFBB RFB_LP CFF TEMP SENSE D1 5.1V (OPT) RENB CO5 (OPT) RFBT_5 RFBT_5b RFBT_3.3 RFBT_3.3b RFBT_2.5 RFBT_2.5b RFBT_1.2 RFBT_1.2b 5Vout 3.3Vout 2.5Vout RTS 1.2Vout VOUT SELECT (J1) Figure 1.
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Test Connections www.ti.com 3 Test Connections The board should be connected to a power supply and load as shown below in Figure 2. The EN post is connected to the UVLO circuit on the back of the board. There is a resistive divider implemented on the board that can be used to establish a precision UVLO level for the board that is currently set to 5.7V. A common user change to this circuit is to adjust the value of RENT and RENB to adjust the operating UVLO to that of the target application.
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Pin Descriptions 4 www.ti.com Pin Descriptions The Demo board is also compatible with the 20-pin edge connector shown in Figure 3. The functionality of the pins is described in Table 1. I I I I VOUT I I I I GND I VIN 9 10 10 A B C D E F H J K L TEMP SENSE 8 VOUT SENSE + 7 NC 6 AGND 5 VIN SENSE - 4 VOUT SENSE - 3 AGND 2 EN 1 AGND VIN SENSE + I I I I I I I I I I I Figure 3. Edge Connector Diagram Table 1.
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Adjusting the Output Voltage www.ti.com 5 Adjusting the Output Voltage The output voltage of the Demo board is adjusted to either 5V, 3.3V, 2.5V, or 1.2V by moving jumper J1. For other voltage options, see the datasheet for adjusting the feedback resistors. 6 Optional Components The Demo board has many options for input and output filtering. CO1, CO2 and CO5 can installed with 47nF or greater ceramic capacitors to further decrease high frequency noise on the output.
PAGE 6
Bill of Materials 7 www.ti.com Bill of Materials Table 2. Bill of Materials (VIN = 6V to 36V (20V), VOUT = 1.2 / 3.3V / 5V, IOUT (MAX) = 10/08/06A) Designator U1 6 Description SIMPLE SWITCHER® Case Size Manufacturer Manufacturer P/N Qty PFM-11 Texas Instruments LMZ13610/08/06, LMZ12010/08/06 1 Cin2, Cin3, Cin4 10 µF, X7S, 50V 1210 TDK C3225X7S1H106M 3 Cin5 150 µF, Aluminum Electrolytic, 50V G Panasonic EEE-FK1H151P 1 Co3, Co4 330µF, 6.3V, 0.
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Performance Characteristics www.ti.com 8 Performance Characteristics Thermal Derating, VOUT = 5.0V 12 90 10 OUTPUT CURRENT (A) EFFICIENCY (%) Efficiency, VOUT = 5.0V 100 80 70 60 10 Vin 12 Vin 16 Vin 20 Vin 50 40 0 1 2 3 4 5 6 7 8 OUTPUT CURRENT (A) 10A 8A 8 6 4 2 0 9 10 -40 -20 0 20 40 60 80 100 120 AMBIENT TEMPERATURE (°C) Startup, VIN = 12V, VOUT = 3.3V Enable 3.
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PCB Layout Diagrams 10 www.ti.com PCB Layout Diagrams Figure 5. Top Layer Figure 6.
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PCB Layout Diagrams www.ti.com Figure 7. Internal Layer II (Routing) Heat Sinking Layer Figure 8.
PAGE 10
PCB Layout Diagrams www.ti.com Figure 9. Top Silkscreen Figure 10.
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