Description Features The ZL2105 is an innovative mixed-signal power management and conversion IC that combines an integrated step-down DC-DC converter with key power and thermal management functions in a single package. The ZL2105EV2 platform allows evaluation of the features in the highly configurable ZL2105 in either stand-alone mode or via an I2C/SMBus interface. • • • • • • • A USB-to-SMBus adapter board can be used to connect the ZL2105EV2 board to a PC. The PMBus command set is accessed by using the Zilker Labs PowerNavigator™ evaluation software from a PC running Microsoft Windows. Target Specifications Small, compact design PMBus control Pin-strap selection for stand-alone operation VOUT settable from +0.6 V to +5 V Convenient power connection Onboard enable switch Power good indicator This board has been designed as a buck regulator for the following conditions: • VIN = 12 V (Board range 4.5 V to 14 V) • VOUT = 3.3 V (Board range 0 to 5 V) • IMAX = 3 A (Board range 0 to 3 A) • fsw = 400 kHz • Efficiency: 83% peak • Output ripple: 0.5% • Dynamic response: 3% (1–2A step, di/dt=2.5A/µs) • Temperature: 25°C POWER IN SW1 EN POWER OUT ZL2105 VTRK J13 J12 SYNC SMBus Track Input SYNC SMBus Track Output PG 3 Figure 1. ZL2105EV2 Block Diagram ZL2105EV2 Functional Description The ZL2105EV2 provides all circuitry required to demonstrate the features of the ZL2105. The ZL2105EV2 has a functionally-optimized ZL2105 circuit layout that allows efficient operation up to the maximum output current. Power and load connections are provided through plug-in sockets. Operation Stand Alone Operation The ZL2105 is easy to setup and operate. It is configured, out of the box, to provide 3.3 V at 3 A from a 12 V source. All input and output connections should to be made before turning the input supply on. Stand alone operation is achieved using the pinstrap settings for the device. The pin-strap settings are described in the ZL2105 data sheet [1]. When the input power supply is turned on, the ZL2105 will output the configured voltage and the load applied to VOUT+/VOUT- can be varied. The ZL2105 Evaluation Board is shown in Figure 2. The SMBus address is selectable through jumpers on the top side of the board. All power to the board (VIN and I2C bus) must be removed before changing the jumpers. The back side of the board has 0402 resistor footprints for setting the application pins using resistors. To modify the pin-strap setting of the ZL2105, input power must be turned off. The user pinstrap resistor pads are on the bottom side of the ZL2105EV2 PCB. Once the desired pin-strap settings and component changes have been applied, power can be turned on and the output can be evaluated for the newly configured mode. Refer to the ZL2105 data sheet [1] for pin-strap and resistor setting information. Refer to Figure 2 for resistor pad locations. The hardware enable function is controlled by a toggle switch on the ZL2105EV2 board. The power good (PG) LED is powered from the SMBus/I2C source; it indicates the correct state of PG when external power is applied to the ZL2105EV2 board. The right angle headers at opposite ends of the board are for connecting a USB to I2C control board or for daisy chaining of multiple evaluation boards. Figure 3 shows the ZL2105 operational circuit. The circuit consists of the ZL2105 power conversion and management IC with its minimal component count to realize a buck converter. The board layout has been optimized for thermal performance. For thermal design considerations relating to the ZL2105, refer to Zilker Labs application note AN10[2]. Figure 5 on Page 8 illustrates the input and output power connections for the ZL2105. The optional input capacitors and output capacitors are also shown on this page. PMBus Operation The ZL2105 utilizes the PMBus protocol. The PMBus functionality can be controlled via USB from a PC running the Zilker Labs evaluation software in a Windows XP or Windows 2000/NT operating system. Install the PowerNavigator software using the CD included in the ZL2105EV2 kit or download it from the web at www.zilkerlabs.com. For PMBus operation, connect another Zilker Labs evaluation board such as the ZL2005EV1 or the USB-to-SMBus adapter board to J12 of the ZL2105EV2 board. When using multiple evaluation boards together, verify that each device is assigned a different SMBus address. Connect the desired load and an appropriate power supply to the input. Place the ENABLE switch in “DISABLE” and turn on the power. The evaluation software allows modification of all ZL2105 PMBus parameters. Manually configure the ZL2105 through the various 2 ZL2105EV2DSR1_0 ZL2105EV2 screens or load a predefined scenario from a configuration file. Use the mouse-over pop-ups for help with PowerNavigator. Refer to Zilker Labs application note AN13 [3] for PMBus details. The ENABLE switch can then be moved to “ENABLE” and the ZL2105 can be tested. Alternately, the PMBus ON-OFF CONFIG and OPERATION commands may be used. Loop Compensation Settings By default, the ZL2105 EVB is configured for 12 V to 3.3 V conversion at 3 A. The output voltage can be changed by using the V1 and V0 resistor pads or through the use of PMBus commands. If the output voltage is set to 1V or below, the loop compensation needs to be modified. Table 1 summarizes the PID settings. This is achieved by using PMBus commands or by modifying the PowerPlan configuration file. Table 1. PID Settings versus Output Voltage VOUT Range PID Setting 1V < VOUT ≤ 5.0V A=5000, B=-9016, C=4170 VOUT ≤1V A=10000, B=-18101, C=8324 These settings are included in the configuration file that is stored on the ZL2105 EVB and is shown here and at the end of this data sheet for reference. For output voltages greater than 1V, the loop compensation is set as: #Loop compensation for 12v:3.3v, PID_TAPS A=5000, B=-9016, C=4170 #NLR_CONFIG Enable,1.5%,No Outer,1.5%,3,3,0 NLR_CONFIG 0xA250 When the output voltage is set to 1V or less, the loop compensation should be: #Loop compensation for 12V:0.8V PID_TAPS A=10000, B=-18101, C=8324 #NLR_CONFIG Enable,1.5%,No Outer,2%,3,3,0 NLR_CONFIG 0xA350 ZL2105EV2DSR1_0 3 ZL2105EV2 Quick Start Guide Stand Alone Operation USB (PMBus) Operation 1. Set ENABLE switch to “DISABLE” 1. Follow step 1 - 4 above 2. Apply load to VOUT+/VOUT- 2. Insert the Zilker Labs Eval Kit CD 3. Connect power supply (supply turned off) to VIN+/VIN- 4. Turn power supply on 5. Set ENABLE switch to “ENABLE” 6. Test ZL2105 operation 7. To change hardware settings, turn input power supply OFF, modify resistor settings and then turn the input power supply ON 3. Connect USB-to-SMBus adapter board to J12 of ZL2105EV2 4. Connect supplied USB cable from computer to USB-to-SMBus adapter board a. Upon first-time connection, the Found New Hardware Wizard will appear. b. Windows XP users: Select ‘No’ at prompt to search the Internet for drivers. c. Follow the steps on the screen to install the drivers from the CD. 5. Install the PowerNavigator evaluation software by running setup.exe from the PowerNavigator_installer folder on the CD. 6. Set voltage to desired value in GUI. 7. Set ENABLE switch on EVB to “ENABLE” 8. Monitor and configure EVB using PMBus commands in the evaluation software 9. Test the ZL2105 operation using the evaluation software. 4 ZL2105EV2DSR1_0 ZL2105EV2 SMBus Address Jumper settings Pin-strap resistor settings Figure 2. ZL2105EV2 Evaluation Board (Top Side and Bottom Side) ZL2105EV2DSR1_0 5 ZL2105EV2 Schematics Figure 3. ZL2105EV2 Circuit 6 ZL2105EV2DSR1_0 ZL2105EV2 Figure 4. ZL2105EV2 Interface ZL2105EV2DSR1_0 7 ZL2105EV2 Figure 5. ZL2105EV2 Power I/O 8 ZL2105EV2DSR1_0 ZL2105EV2 Board Layout – 4 Layers Figure 6. PCB – Top Layer ZL2105EV2DSR1_0 9 ZL2105EV2 Figure 7. PCB – Inner Layer 1 (Viewed from Top) 10 ZL2105EV2DSR1_0 ZL2105EV2 Figure 8. PCB – Inner Layer 2 (Viewed from Top) ZL2105EV2DSR1_0 11 ZL2105EV2 Figure 9. PCB – Bottom Layer (Viewed from Top) 12 ZL2105EV2DSR1_0 ZL2105EV2 Typical Performance Data for Buck Regulator Unless noted: Vin = 12V, Vout = 3.3V, fSW = 400kHz, TA = +25°C 95 90 Efficiency (%) VIN =5V 85 VIN =12V 80 75 VOUT=3.3V fSW =400kHz 70 0 0.5 1 1.5 2 2.5 3 3.5 Output Current (A) Figure 10. Measured Efficiency Figure 11. Ripple ZL2105EV2DSR1_0 13 ZL2105EV2 Figure 12. Dynamic Response (1 – 2A load step, di/dt=1A/µs) Figure 13. Dynamic Response (2 - 1A load step, di/dt=1A/µs) 14 ZL2105EV2DSR1_0 ZL2105EV2 Bill of Materials ITEM QTY REFDES 1 2 C1,C4 2 1 C2 3 1 C3 4 1 C5 5 1 C6 6 3 C7,C9,C10 7 1 C8 8 1 C11 9 1 C12 10 1 C63 11 3 C67,C68,C69 12 1 C113 13 1 D10 14 1 D12 15 2 D13,D15 16 1 FB1 17 1 JP11 18 2 J1,J2 19 1 J12 20 1 J13 21 1 J15 22 2 J24,J25 23 1 L2 24 1 Q12 25 1 R1 27 1 R17 28 1 R18 29 1 R19 30 1 R20 31 1 R21 32 2 R120,R125 33 1 R121 34 1 R126 35 3 R127,R128,R131 36 1 R129 37 1 R130 38 2 R143,R144 39 1 R150 40 2 R155,R156 42 1 SW1 44 1 U1 45 1 U10 47 2 XX8,XX9 48 4 XX20,XX21,XX22,XX23 49 4 XX24,XX25,XX26,XX27 50 4 XX30,XX31,XX32,XX33 51 1 XX34 VALUE 4.7u 10u 1u 47n 10u 47u 100n 220u 10n 180u 22u 1u STPS20L45CG LED Green BAT54XV2T1G 1000Z 4 PIN CON2_Banana HEADER 5X2 HEADER 5X2 HEADER 5x2 PIN 2 PIN 4.7u 2N7002/SOT 91 10.0k 11.0k 12.1k 13.3k 14.7k 100k 392 2.21k 21.5k 49R9 49R9 49R9 499 0 SW_SPDT ZL2105 MIC2920A-3.3WS TOL RATING TYPE 20% 10V X5R 20% 6.3V X5R 10% 25V X5R 10% 25V X7R 20% 16V X5R 20% 6.3V X5R 10% 50V X7R 20% 6.3V TANT 10% 25V X7R 20% 16V ELECT POLY 10% 16V X5R 10% 10V X7R 45V 20mA CLR 30V SCHOTTKY 25% 50mA MLC SN 15A SN 20% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 5% 3.4A 60V 100mW 63mW 63mW 63mW 63mW 63mW 63mW 100mW 63mW 63mW 100mW 250mW 63mW 63mW 63mW SN SN SH DRUM N-CH THK FILM THK FILM THK FILM THK FILM THK FILM THK FILM THK FILM THK FILM THK FILM THK FILM THK FILM THK FILM THK FILM THK FILM THK FILM 3A 400mA PHL PCB PCB FOOTPRINT SM0805 SM0805 SM0603 SM0603 SM1206 SM1206 SM0603 SM7343 SM0603 8.3X8.3_PXA_FLD SM1210 SM0603 D-2PAK SM0805_DIO_1C2A SOD-523 SM0603 SIP4/100 JACK_F HDR5DUALRA100X100 HDRF5DUALRA100X100 HDR10DUAL100X100 SIP2/100 IHLP_2525BD SOT-23 SM0603 SM0402 SM0402 SM0402 SM0402 SM0402 SM0402 SM0603 SM0402 SM0402 SM0603 SM1206 SM0402 SM0402 SM0402 SW_TOG_SPDT MLF36_6X6BX SOT223_1234_FLD SHUNT_HDR_WITH_TAB STANDOFF_4-40 SCREW_4-40 CAP_MOLDED.25ID BDOTLN3.0HX4.0L MFR PANASONIC-ECG MURATA TAIYO YUDEN AVX TDK TDK MURATA NICHICON PANASONIC-ECG UCC MURATA TAIYO YUDEN ST MICROELECT CHICAGO MINIATURE ON SEMI MURATA TYCO EMERSON SAMTEC SAMTEC SAMTEC TYCO TDK ON SEMI ROHM MFR PN ECJ-GVB1A475M GRM21BR60J106ME19L TMK107BJ105KA-T 06033C473KAT2A C3216X5R1C106M C3216X5R0J476M GRM188R71H104KA93D F910J227MNC ECJ-1VB1E103K APXA160ARA181MHC0G GRM32ER61C226KE20L LMK107BJ105KA-T STPS20L45CG CMD17-21VGC BAT54XV2T1G BLM18HD102SN1D 644456-4 108-0740-001 TSW-105-08-T-D-RA SSQ-105-02-T-D-RA TSW-105-07-T-D 644456-2 RLF7030T-4R7M3R4 2N7002LT1 MCR03EZPFX91R0 YAGEO YAGEO YAGEO RC0402FR-07100KL RC0603FR-07392RL RC0402FR-072K21L ROHM YAGEO YAGEO YAGEO YAGEO NKK ZILKER LABS INC MICREL TYCO MCR03EZPFX49R9 RC1206FR-0749R9L RC0402FR-0749R9L RC0402FR-07499L RC0402JR-070RL G13AP ZL2105ALNFT MIC2920A-3.3WS 881545-2 YAGEO BUILDING FASTENERS PMS 440 0025 PH CAPLUGS VC-234-8 ZILKER LABS INC MPWB-ZL2105-004 NOT INSTALLED: 26 41 43 46 18 R2,R22,R23,R26,R27,R34, R35,R100,R134,R135, R136,R137,R142,R145, R152,R153,R157,R158 1 R185 10 TP1,TP2,TP5,TP6,TP7,TP8, TP10,TP11,TP12,TP13 1 XX1 ZL2105EV2DSR1_0 0 5% 63mW THK FILM SM0402 NI T POINT S 1% 100mW THK FILM SM0603 TP_036H_REV1 TIEPT/10WIDE RC0402JR-070RL TIEPT/10WIDE 15 ZL2105EV2 Default Configuration Text The following text is loaded into the ZL2105EV2 as default settings. Each PMBus command is loaded via the ZL2105EV2 interface software. The # symbol is used for a comment line. #ZL2105-002-DB08 #NOTE: This file is intended for the Rev. 1 ZL2105-EV2 with L=4.7uH, Co=3x(47uF/2.5mohm)+(220uF/250mohm) #Configuration File Format: #PMBus Command <tab> Hex Value #Erase user store & default store RESTORE_FACTORY STORE_USER_ALL STORE_DEFAULT_ALL #RESPONSES #low FET not enabled for output OV and UV count to 2 OVUV_CONFIG 0x01 #LIMITS VIN_UV_FAULT_LIMIT 4.5 #Set output peak/valley current protection to 4.0 to -4.0A IOUT_OC_FAULT_LIMIT 4 IOUT_UC_FAULT_LIMIT -4 #Set output average current protection to 3.3 to -3.3A IOUT_AVG_OC_FAULT_LIMIT 3.3 IOUT_AVG_UC_FAULT_LIMIT -3.3 #SETTINGS #Set Vout to 3.3V VOUT_COMMAND 3.30000 #Set IOUT_SCALE to 151mOhms IOUT_SCALE 151 #Set IOUT_OFFSET to -0.4A IOUT_CAL_OFFSET -0.4A #Use Rdson internal current sense method with internal tempco sensor, delay 512nS, 3 counts MFR_CONFIG 0x8100 #Set temperature compensation at 400ppm/ C internal temp sensor TEMPCO_CONFIG 0x04 #Set deadtime to 0ns H-L min dynamic and 16ns L-H fixed DEADTIME_CONFIG 0x0086 DEADTIME 0x0010 #Loop compensation for 12v:3.3v, ~100mv peak under 1-2A transient @ 2.5A/us, with NLR. PID_TAPS A=5000, B=-9016, C=4170 #NLR_CONFIG Enable,1.5%,No Outer,1.5%,3,3,0 NLR_CONFIG 0xA250 #Loop compensation for 12V:0.8V, ~20kHz BW, ~60deg PM, ~30mv peak under 0.5A step #PID_TAPS A=10000, B=-18101, C=8324 #NLR_CONFIG Enable,1.5%,No Outer,2%,3,3,0 #NLR_CONFIG 0xA350 STORE_DEFAULT_ALL RESTORE_DEFAULT_ALL 16 ZL2105EV2DSR1_0 ZL2105EV2 References [1] ZL2105 Data Sheet, Zilker Labs, Inc., 2008. [2] AN10 – ZL2005 and ZL2105 Thermal and Layout Guideline, Zilker Labs, Inc., 2006. [3] AN13 – PMBus™ Command Set, Zilker Labs, Inc., 2007. Ordering Information Orderable Part Number ZL2105EVK2 ZL2105EV2 Description ZL2105 Evaluation Kit, one channel ZL2105 Evaluation board only Revision History Date Rev. # 1-22-08 1.0 ZL2105EV2DSR1_0 Initial Release based on ZL2105EV1 data sheet 17 ZL2105EV2 Zilker Labs, Inc. 4301 Westbank Drive Building A-100 Austin, TX 78746 Tel: 512-382-8300 Fax: 512-382-8329 www.zilkerlabs.com © 2008, Zilker Labs, Inc. All rights reserved. Zilker Labs, Digital-DC and the Zilker Labs Logo are trademarks of Zilker Labs, Inc. All other products or brand names mentioned herein are trademarks of their respective holders. Pricing, specifications and availability are subject to change without notice. Please see www.zilkerlabs.com for updated information. This product is not intended for use in connection with any high-risk activity, including without limitation, air travel, life critical medical operations, nuclear facilities or equipment, or the like. The reference designs contained in this document are for reference and example purposes only. THE REFERENCE DESIGNS ARE PROVIDED "AS IS" AND "WITH ALL FAULTS" AND ZILKER LABS DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS OR IMPLIED. ZILKER LABS SHALL NOT BE LIABLE FOR ANY DAMAGES, WHETHER DIRECT, INDIRECT, CONSEQUENTIAL (INCLUDING LOSS OF PROFITS), OR OTHERWISE, RESULTING FROM THE REFERENCE DESIGNS OR ANY USE THEREOF. Any use of such reference designs is at your own risk and you agree to indemnify Zilker Labs for any damages resulting from such use. 18 ZL2105EV2DSR1_0