Preliminary Technical Data ADP1829 Reference Design FCDC 00062 FEATURES Five Output Voltages: 1.0V, 1.8V, 3.3V x 2, 5V Output Current: 0.7A to 2.8A Input voltage: 9-12V Ripple 2% ppk of Output Voltage Transient step ±5%, 50% max load ADP1829 REFERENCE DESIGN DESCRIPTION This ADP1829 Reference Design is a paper only design. The reference design uses 9V to 12V for in the input voltage. The output voltages and currents are as follows: VOUT1 = 1.0 V with a maximum output current of 2.8 A, VOUT2 = 1.8V with a maximum output current of 0.8A, VOUT3 = 3.3 V with a maximum output current of 0.7 A, VOUT4 = 5.0 V with a maximum output current of 0.5 A and VOUT5 = 3.3 V with a maximum output current of 0.7 A. Design criteria are for sequencing in the order: VOUT3 then VOUT2 then VOUT1. No ripple or transient specification were supplied so assumptions of 2% peak to peak voltage ripple and 5% deviation due to 50% instantaneous load step are used, unless other capacitors are present on the main board. The RF outputs are designed with extremely low ripple (<1mV) and have a second filter stage to remove high frequency switching noise. The switching frequency is fixed at 300kHz for all switching outputs. Synchronization can be implemented by a resistor stuffing option. Rev. 1 Reference designs are as supplied “as is” and without warranties of any kind, express, implied, or statutory including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. No license is granted by implication or otherwise under any patents or other intellectual property by application or use of reference designs. Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Analog Devices reserves the right to change devices or specifications at any time without notice. Trademarks and registered trademarks are the property of their respective owners. Reference designs are not authorized to be used in life support devices or systems. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved. Preliminary Technical Data FCDC 00062 TABLE OF CONTENTS Features....................................................................................................................................................................................................... 1 ADP1829 Reference Design Description .............................................................................................................................................. 1 Revision History........................................................................................................................................................................................ 2 GENERAL DESCRIPTION..................................................................................................................................................................... 3 ADP1829................................................................................................................................................................................................ 3 ADP1706/ADP1708 ............................................................................................................................................................................. 3 Typical Performance Characteristics...................................................................................................................................................... 4 Schematic ................................................................................................................................................................................................... 6 Bill of Materials ......................................................................................................................................................................................... 8 TABLE OF FIGURES Figure 1. Calculated efficiency of 1.0V output ................................................................................................................................ 4 Figure 2. Calculated efficiency of 1.8V output ................................................................................................................................ 4 Figure 3. Calculated efficiency of 3.8V output ................................................................................................................................ 5 Figure 4. Calculated efficiency of 5.4V output ................................................................................................................................ 5 Figure 5. ADP1829 Reference Design Schematic .......................................................................................................................... 6 REVISION HISTORY 10/3/2007—Revision 0: Initial Version 10/4/2007—Revision 1: Added linear to 5V output, labeled Signal ground for each switcher Rev. 1 | Page 2 of 10 Preliminary Technical Data FCDC 00062 GENERAL DESCRIPTION ADP1829 The ADP1829 is a versatile, dual output, interleaved, synchronous PWM buck controller that generates two independent outputs from an input voltage of 2.9 V to 20 V. Each channel can be configured to provide output voltage from 0.6V to 85% of the input voltage. The two channels operate 180° out of phase, which reduces the current stress on the input capacitor and allows the use of a smaller and lower cost input capacitor. The ADP1829 operates at a pin-selectable fixed switching frequency of either 300 kHz or 600 kHz. For some noise sensitive applications, it can also be synchronized to an external clock to achieve switching frequency between 300 kHz and 1 MHz. The switching frequency chosen is 300 kHz to get good efficiency over a wide range of input and output conditions. The ADP1829 includes an adjustable soft start to limit input inrush current, voltage tracking for sequencing or DDR termination, independent power-good output, and a power enable pin. It also provides current-limit and short-circuit protection by sensing the voltage on the synchronous MOSFET. ADP1706/ADP1708 The ADP170X is a family of low drop out CMOS linear regulators that provides versatile and inexpensive step-down voltage regulation. The input voltage range is 2.5 V to 5.5 V and the output current capability is up to 1 A. The various versions provide features such as Enable, Soft Start and Tracking. They are available is space saving LFCSP-8 and SOIC-8 packages and operate over the –40°C to +125°C temperature range. Rev. 1 | Page 3 of 10 Preliminary Technical Data FCDC 00062 TYPICAL PERFORMANCE CHARACTERISTICS Figure 1. Calculated efficiency of 1.0V output Figure 2. Calculated efficiency of 1.8V output Rev. 1 | Page 4 of 10 Preliminary Technical Data FCDC 00062 Figure 3. Calculated efficiency of 3.8V output Figure 4. Calculated efficiency of 5.4V output Rev. 1 | Page 5 of 10 Preliminary Technical Data FCDC 00062 SCHEMATIC Figure 5. ADP1829 Reference Design Schematic Rev. 1 | Page 6 of 10 Preliminary Technical Data FCDC 00062 Rev. 1 | Page 7 of 10 Preliminary Technical Data FCDC 00062 BILL OF MATERIALS Vout1, Vout2, and Vout3 Bill of Materials Description Capacitor Ceramic X7R 1u 0603 16V Capacitor Ceramic X7R 10u 1206 16V Capacitor Ceramic X7R 10n 0603 50V Capacitor Ceramic X7R 100n 0603 16V Capacitor Ceramic COG 33p 0603 50V Capacitor Ceramic X7R 2.7n 0603 50V Capacitor Ceramic X7R 2.2n 0603 50V Capacitor Ceramic X7R 4.7n 0603 50V Capacitor Ceramic X7R 15n 0603 16V Capacitor Ceramic X7R 4.7u 0805 16V Capacitor Ceramic X7R 22u 1206 6.3V Capacitor Ceramic X7R 1.5n 0603 50V Capacitor Ceramic COG 22p 0603 50V Diode Schottky 200mA SOD-323 30V Inductor Ferrite 15uH 7.3mm x 7.3mm Inductor Ferrite 3.8uH 10.2mm x 10mm Single N-Channel MOSFET TSOP-6 30V Single N-Channel MOSFET TSOP-6 30V 1A Thick Film 0 Ohm jumper 0603 5% Thick Film 10 Ohms 0603 1% Thick Film 10.0k 0603 1% Thick Film 20.0k 0603 1% Thick Film 30.1k 0603 1% Thick Film 22.1 Ohms 0603 1% Thick Film 4.32k 0603 1% Thick Film 1.78k 0603 1% Thick Film 40.2k 0603 1% Thick Film 36.5k 0603 2 chan 300k to 600k PWM LFCSP-32 1A 3.3V Linear Reg SOIC-8 w/SS Designator Cvcc1, Cbias1, Cpv1 Cin11, Cin21, Co22 Css3 Cb1, Cb2 Clim1, Clim2, Cc20 Cc21 Cc12 Cc22 Css1, Css2 Cin31, Co31 Co21, Co11, Co12 Cc11 Cc10 Db1, Db2 L2 L1 QH1, QH2 QL1, QL2 Rf23, Rnsync Rin1, Rpv1, Rc22 Rpg1, Rpg2, Rf22, Ren Rf11, Rf21 Rf12 Rc12 Rlim1 Rlim2 Rc11 Rc21 U1 U2 Quantity 3 3 1 2 3 1 1 1 2 2 3 1 1 2 1 1 2 2 2 3 Rev. 1 | Page 8 of 10 4 2 1 1 1 1 1 1 1 1 Manufacturer Murata Murata Vishay Vishay Vishay Vishay Vishay Vishay Vishay Murata Murata Vishay Vishay Diodes inc Coilcraft Coilcraft Vishay Vishay Vishay Vishay MFR# GRM188R71C105KA12D GRM31CR71C106KAC7L Generic Generic Generic Generic Generic Generic Generic GRM21BR71C475KA73L GRM31CR70J226KE19L Generic Generic BAT54WS MSS7341-153 MSS1038-382MLC Si3456BDV Si3424BDV Generic Generic Vishay Vishay Vishay Vishay Vishay Vishay Vishay Vishay Analog Devices Analog Devices Generic Generic Generic Generic Generic Generic Generic Generic ADP1829ACPZ ADP1706ARDZ-3.3-R7 Preliminary Technical Data FCDC 00062 Vout3 and Vout4 Bill of Materials Description Capacitor Ceramic X7R 2.2n 0603 50V Capacitor Ceramic COG 150p 0603 50V Capacitor Ceramic X7R 1.5n 0603 50V Capacitor Ceramic X7R 1u 0603 16V Capacitor Ceramic X7R 47n 0603 16V Capacitor Ceramic X7R 10n 0603 50V Capacitor Ceramic X7R 10u 1206 16V Capacitor POSCAP 105C 150u 7343 16V 2nd source KO Cap 105C 150u 7343 16V Capacitor POSCAP 105C 150u 7343 6.3V 2nd source KO Cap 105C 150u 7343 6.3V Capacitor Ceramic X7R 100n 0603 16V Capacitor Ceramic COG 33p 0603 50V Capacitor Ceramic X7R 22u 1206 6.3V Capacitor Ceramic X7R 4.7u 0805 16V Diode Schottky 200mA SOD-323 30V Inductor Ferrite 22uH 10.2mm x 10mm Inductor Ferrite 33uH 7.3mm x 7.3mm Inductor HF Ferrite 500Ohms 1206 2.0A Single N-Channel MOSFET TSOP-6 30V Single N-Channel MOSFET TSOP-6 30V 1A Thick Film 0 Ohm jumper 0603 5% Thick Film 10 Ohms 0603 1% Thick Film 10.0k 0603 1% Thick Film 20.0k 0603 1% Thick Film 1.50k 0603 1% Thick Film 2.49k 0603 1% Thick Film 2.26k 0603 1% Thick Film 1.07k 0603 1% Thick Film 3.74k 0603 1% Thick Film 40.2k 0603 1% Thick Film 147k 0603 1% Thick Film 28.0k 0603 2 chan 300k to 600k PWM LFCSP-32 1A 3.3V Linear Reg SOIC-8 w/SS 1A Adjustable Linear Reg SOIC-8 Designator Cc11, Cc21 Cc10, Cc20 Cc12, Cc22 Cvcc, Cbias, Cpv Css1, Css2 Css3 Cin11, Co11, Cin21, Co21 Cinb (Cinb) Co12, Co22 (Co12), (Co22) Cb1, Cb2 Clim1, Clim2 Cin31, Cin41 Co31, Co41 Db1, Db2 L1 L2 L3hf, L4hf QH1, QH2 QL1, QL2 Rf23, Freql, Rnsync Rin, Rpv Rpg1, Rpg2, Ren3, Ren4 Rf11, Rf21 Rc12, Rc22 Rf22 Rlim1 Rlim2 Rf12 Rc11, Rc21 Rf41 Rf42 U1 U2 U3 Quantity 2 2 2 3 2 1 Manufacturer Vishay Vishay Vishay Murata Vishay Vishay MFR# Generic Generic Generic GRM188R71C105KA12D Generic Generic 4 1 (1) 2 (2) 2 2 2 2 2 1 1 2 2 2 3 2 Murata Sanyo Kemet Sanyo Kemet Vishay Vishay Murata Murata Diodes inc Coilcraft Coilcraft Taiyo Yuden Vishay Vishay Vishay Vishay GRM31CR71C106KAC7L 16TQC68M T520D686M016A(1)E050 6TPB150M T520D157M006A(1)E055 Generic Generic GRM31CR70J226KE19L GRM21BR71C475KA73L BAT54WS MSS1038-223MLC MSS7341-333MLD FBMH3216HM501NT Si3456BDV Si3424BDV Generic Generic Vishay Vishay Vishay Vishay Vishay Vishay Vishay Vishay Vishay Vishay Analog Devices Analog Devices Analog Devices Generic Generic Generic Generic Generic Generic Generic Generic Generic Generic ADP1829ACPZ ADP1706ARDZ-3.3-R7 ADP1708ARDZ-R7 Rev. 1 | Page 9 of 10 4 2 2 1 1 1 1 2 1 1 1 1 1 Preliminary Technical Data FCDC 00062 NOTES Reference designators shown on the schematic but not listed on the Bill of Materials are place holders for possible design adjustments (snubbers, additional decoupling capacitors, stuff options ) These components should be put in the layout, but not populated unless after testing it is deemed necessary. If a different number, or different type of output capacitors are used on the switching outputs the loop compensation components may need adjustment. ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. EB Rev. 1 | Page 10 of 10