Preliminary Technical Data ADP1823, APD2106 and ADP1821 Reference Design FCDC 00043 FEATURES Six Output Voltages: 1.2 V, 1.8 V, 2.5 V, 3.3 V, 5 V, 12 V Output Current: 1 A to 4.5 A Input voltage: 14.4-20.0 V Ripple 2% ppk of Output Voltage Transient step ±5%, 50% max load ADP1823, APD2106 AND ADP1821 REFERENCE DESIGN DESCRIPTION This ADP1823, APD2106 and ADP1821 Reference Design uses 14.4 V to 20.0 V for the input voltage. The output voltages and currents are as follows: • VOUT1 = 1.2 V with a maximum output current of 3.9 A, • VOUT2 = 1.8 V with a maximum output current of 1.3 A, • VOUT3 = 3.3 V with a maximum output current of 4.5 A, • VOUT4 = 5.0 V with a maximum output current of 3.84 A, • VOUT5 = 2.5 V with a maximum output current of 1.025 A and • VOUT6 = 12 V with a maximum output current of 1.2 A. Design criteria are for coincidental tracking of VOUT1, VOUT2 and VOUT3 with VOUT4 for both turn on and turn off. The ripple and transient assumptions are 2% peak to peak voltage ripple and 5% deviation due to 50% instantaneous load step, except for VOUT1 which is 1.5% peak to peak ripple and 5% deviation due to 25% instantaneous load step. The switching frequency is fixed at 300 kHz for VOUT1, VOUT2, VOUT3 VOUT4 and VOUT6. VOUT5 switches at a fixed frequency of 1.2 MHz Rev. A 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. www.analog Tel: 781.329.4700 Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights rese Preliminary Technical Data FCDC 00043 TABLE OF CONTENTS Features....................................................................................................................................................................................................... 1 ADP1823, APD2106 and ADP1821 Reference Design Description.................................................................................................. 1 Revision History........................................................................................................................................................................................ 2 General Description ................................................................................................................................................................................. 3 ADP1823................................................................................................................................................................................................ 3 ADP2106................................................................................................................................................................................................ 3 ADP1821................................................................................................................................................................................................ 3 Schematic ................................................................................................................................................................................................... 4 Bill of Materials ......................................................................................................................................................................................... 8 TABLE OF FIGURES Figure 1. Schematic 1.2 V @ 3.9 A, 1.8 V @ 1.3 A .......................................................................................................................... 4 Figure 2. Schematic: 3.3 V @ 4.5 A and 5.0 V @ 3.84 A................................................................................................................. 5 Figure 3. Schematic: 2.5 V @ 1.025 A and linear regulators at 1.5 V and 3.3 V ......................................................................... 6 Figure 4. Schematic: 12.0 V @ 1.2 A ................................................................................................................................................. 7 REVISION HISTORY 7/3/2007—Revision 0: Initial Version 7/4/2007—Revision 1: Added snubber and clamp zener on CS pin on 12 V SEPIC. Changed input voltage to max of 20 V. 7/5/2007—Revision 2: Changed minimum input voltage to 14.4 V. Changed 12 V output to buck converter for higher efficiency and smaller footprint. Rev. A | Page 2 of 11 Preliminary Technical Data FCDC 00043 GENERAL DESCRIPTION ADP1823 The ADP1823 is a versatile, dual output, interleaved, synchronous PWM buck controller that generates two independent outputs from an input voltage of 3.7 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 ADP1823 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 ADP1823 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. ADP2106 The ADP2106 is a versatile, single output, synchronous PWM buck controller with integrated synchronous FETs that generates a single output from an input voltage of 2.7 V to 5.5 V. The controller can be configured to provide output voltage from 0.8 V to the input voltage with an output current up to 1.5 A. The ADP2106 operates at a fixed switching frequency of 1.2 MHz to reduce component size. The ADP2106 includes an adjustable soft start to limit input inrush current. Inherent to its current mode design it provides current-limit and short-circuit protection by sensing the voltage on the synchronous MOSFET. ADP1821 The ADP1821 is a versatile and inexpensive, synchronous, pulse width-modulated (PWM), voltage-mode, step-down controller. It drives an all N-channel power stage to regulate an output voltage as low as 0.6 V. The ADP1821 can be configured to provide output voltages from 0.6 V to 85% of the input voltage and is sized to handle large MOSFETs for point-of-load regulators. The ADP1821 is well suited for a wide range of high power applications, such as DSP and processor core power in telecom, medical imaging, high performance servers, and industrial applications. It operates from a 3.0 V to 5.5 V supply with a power input voltage ranging from 1.0 V to 24 V. The ADP1821 operates at a pin-selectable, fixed switching frequency of either 300 kHz or 600 kHz, minimizing external component size and cost. For noise-sensitive applications, it can be synchronized to an external clock to achieve switching frequencies between 300 kHz and 1.2 MHz. The ADP1821 includes soft start protection to limit the inrush current from the input supply during startup, reverse current protection during soft start for precharged outputs, as well as a unique adjustable lossless current-limit scheme utilizing external MOSFET sensing. The ADP1821 operates over the –40°C to +85°C temperature range and is available in a 16-lead QSOP. Rev. A | Page 3 of 11 Preliminary Technical Data FCDC 00043 SCHEMATIC Figure 1. Schematic 1.2 V @ 3.9 A, 1.8 V @ 1.3 A 1.2V at 3.9A and 1.8V at 1.3A Vo1V8 Vin Rc12 Cc12 Rf11 Cvcc Rt1h Rt1l Css1 Rin Cbias Cc10 Din Cc11 32 31 30 29 CMP1 TRK1 SS1 VREG Rc11 1 2 FB1 28 27 26 25 IN LDO EN2 EN1 SD POK1 4 5 6 7 8 Cc20 Rt2h Vo3V3 Rf22 POK1V2 24 Cin11 SYNC BST1 Rf12 3 Rpg1 FREQ DH1 ADP1823ACP GND SW1 UV2 CSL1 FB2 PGND1 CMP2 DL1 TRK2 PV 23 22 10 11 12 13 14 15 QH1 21 20 Co11 Co12 Rlim1 Clim1 Db1 L1 Vo1V2 Csn1 19 Rpv 18 Rsn1 QL1 17 SS2 POK2 BST2 DH2 SW2 CSL2 PGND2 DL2 9 Cb1 Cpv 16 QL2 Rsn2 Rt2l Csn2 Clim2 Vo1V8 Rc21 Cc21 Css2 Db2 Rlim2 Rpg2 L2 Co21 Co22 POK1V8 Rf23 Rc22 QH2 Rf21 Cb2 Cc22 Rev. A | Page 4 of 11 Cin21 Preliminary Technical Data Figure 2. FCDC 00043 Schematic: 3.3 V @ 4.5 A and 5.0 V @ 3.84 A r r Rev. A | Page 5 of 11 Preliminary Technical Data Figure 3. FCDC 00043 Schematic: 2.5 V @ 1.025 A and linear regulators at 1.5 V and 3.3 V Rev. A | Page 6 of 11 Preliminary Technical Data FCDC 00043 Figure 4. Schematic: 12.0 V @ 1.2 A 12.0V at 1.2A Vin Rz Rzc Qpv Dlim Db Rpv BST QH1 Cz PVCC Cb DH Cin1 Rin Cpv DL U1 SW PGND Rlim L1 SYNC Vo12V0 Co2 Co1 CSL Clim ADP1821ARQZ Csn Reh FREQ VCC SHDN COMP PWGD FB GND SS Cvcc QL1 Rsn Rel Cc1 Rpg Css Cc2 Rc1 Cc0 Rc2 Rf2a Rf1 Rev. A | Page 7 of 11 Rf2b Preliminary Technical Data FCDC 00043 BILL OF MATERIALS Table 1. Vout1, and Vout2 Bill of Materials (1.2 V and 1.8 V) Description Designator Quantity Manufacturer MFR# Capacitor Ceramic COG 560p 0603 50V Cc12 1 Vishay Generic Capacitor Ceramic COG 100p 0603 50V Cc10 1 Vishay Generic Generic Capacitor Ceramic COG 82p 0603 50V Cc20 1 Vishay Capacitor Ceramic X7R 2.2n 0603 50V Cc11 1 Vishay Generic Capacitor Ceramic X7R 1u 0603 16V Cbias, Cpv 2 Murata GRM188R71C105KA12D Capacitor Ceramic X7R 1u 0603 25V Cvcc 1 Murata GRM188R71E105KA12D Capacitor Ceramic X7R 22n 0603 16V Css1, Css2 2 Vishay Generic Capacitor Ceramic X7R 10u 1206 25V Cin11 1 Murata GRM31CR71E106KA12L Capacitor Ceramic X7R 4.7u 1206 25V Cin21 1 Murata GRM31CR71E475KA88L Capacitor Ceramic X7R 100n 0603 16V Cb1, Cb2 2 Vishay Generic Capacitor Ceramic COG 33p 0603 50V Clim1, Clim2 2 Vishay Generic Capacitor Ceramic X7R 3.3n 0603 50V Cc21 1 Vishay Generic Capacitor Ceramic X7R 1.2n 0603 50V 1 Vishay Generic Capacitor Ceramic X7R 22u 1210 10V Cc22 Co11, Co12, Co21, Co22 4 Murata GRM32ER71A226KE20L Diode Schottky 200mA SOD-323 40V Db1, Db2 2 Diodes inc BAT54H Diode Zener 200mW SOD-323 18V Din 1 Diodes inc MMSZ5248BS Inductor Ferrite 3.8uH 10.4mm x 10.4mm L1 1 Toko B966AS-3R9N Inductor Ferrite 15uH 10.2mm x 10mm L2 1 Toko B952AS-150M Single N-Channel MOSFET SO8 30V QH1 1 Vishay Si4394DY Single N-Channel MOSFET SO8 30V QL1 1 Vishay Si4324DY Single N-Channel MOSFET 1206-8 30V QH2 1 Vishay Si5402bdc Single N-Channel MOSFET SO8 30V QL2 1 Vishay Si4684DY 5% Thick Film 10 Ohms 0603 Rpv, Rf23 2 Vishay Generic 1% Thick Film 200 Ohms 0603 Rin 1 Vishay Generic 1% Thick Film 10.0k 0603 Rpg1, Rpg2, Rf22, Rt2l 4 Vishay Generic 1% Thick Film 20.0k 0603 Rf11, Rf21, Rt1h, Rt2h, Rf12, Rt1l 6 Vishay Generic 1% Thick Film 47.0 Ohms 0603 Rc22 1 Vishay Generic 1% Thick Film 620 Ohms 0603 Rlim1, Rlim2 2 Vishay Generic 1% Thick Film 91.0 Ohms 0603 Rc12 1 Vishay Generic 1% Thick Film 5.60k 0603 Rc11 1 Vishay Generic 1% Thick Film 6.20k 0603 Rc21 1 Vishay Generic 2 chan 300k to 600k PWM LFCSP-32 U1 1 Analog Devices ADP1823ACPZ Rev. A | Page 8 of 11 Preliminary Technical Data FCDC 00043 Table 2. Vout3 and Vout4 Bill of Materials (3.3 V and 5.0 V) Description Capacitor Ceramic COG 680p 0603 50V Designator Cc12 Quantity 1 Manufacturer Vishay MFR# Generic Capacitor Ceramic COG 68p 0603 50V Cc10 1 Vishay Generic Capacitor Ceramic X7R 1u 0603 16V Cbias, Cpv 2 Murata GRM188R71C105KA12D Capacitor Ceramic X7R 1u 0603 25V Cvcc 1 Murata GRM188R71E105KA12D Capacitor Ceramic X7R 47n 0603 16V Css1 1 Vishay Generic Capacitor Ceramic X7R 220n 0603 16V Css2 1 Vishay Generic Capacitor Ceramic COG 82p 0603 50V Cc20 1 Vishay Generic Capacitor Ceramic X7R 100n 0603 16V Cb1, Cb2 2 Vishay Generic Capacitor Ceramic COG 33p 0603 50V Clim1, Clim2 2 Vishay Generic Capacitor Ceramic X7R 1.8n 0603 50V Cc11 1 Vishay Generic Capacitor Ceramic X7R 2.2n 0603 50V Cc21 1 Vishay Generic Capacitor Ceramic COG 820p 0603 50V 1 Vishay Generic Capacitor Ceramic X7R 22u 1210 25V Cc22 Cin11, Cin21, Cin22 3 Murata GRM32ER71E226KE15L Capacitor Ceramic X7R 22u 1210 10V Co11, Co12, Co21, Co22 4 Murata GRM32ER71A226KE20L Diode Schottky 200mA SOD-323 40V Db1, Db2 2 Diodes inc BAT54H Diode Zener 200mW SOD-323 18V Din 1 Diodes inc MMSZ5248BS Inductor Ferrite 5.6uH 10.3mm x 10.3mm L1 1 Toko 962BS-5R6M Inductor Ferrite 8.0uH 12.3mm x 12.3mm L2 1 Toko 931AS-8R0M Single N-Channel MOSFET SO8 30V QH1, QH2 2 Vishay Si4394DY Single N-Channel MOSFET SO8 30V QL1, QL2 2 Vishay Si4324DY 5% Thick Film 10 Ohms 0603 Rpv, Rf23 2 Vishay Generic 1% Thick Film 200 Ohms 0603 Rin 1 Vishay Generic 1% Thick Film 10.0k 0603 2 Vishay Generic 1% Thick Film 22.0k 0603 Rpg1, Rpg2 Rf11, Rf21, Rt1h, Rel 4 Vishay Generic 1% Thick Film 3.00k 0603 Rf22 1 Vishay Generic 1% Thick Film 68.0 Ohms 0603 Rc22 1 Vishay Generic 1% Thick Film 680 Ohms 0603 Rlim2 1 Vishay Generic 1% Thick Film 750 Ohms 0603 Rlim1 1 Vishay Generic 1% Thick Film 110k 0603 Reh 1 Vishay Generic 1% Thick Film 1.00k 0603 Rf12a, Rt1la 2 Vishay Generic 1% Thick Film 3.90k 0603 Rf12b, Rt1lb 2 Vishay Generic 1% Thick Film 75 Ohms 0603 Rc12 1 Vishay Generic 1% Thick Film 7.50k 0603 Rc11 1 Vishay Generic 1% Thick Film 6.8k 0603 Rc21 1 Vishay Generic 2 chan 300k to 600k PWM LFCSP-32 U1 1 Analog Devices ADP1823ACPZ Rev. A | Page 9 of 11 Preliminary Technical Data FCDC 00043 Table 3. Vout5 and Linear Regulators Bill of Materials (2.5V, 1.5V and 3.3V) Description Designator Quantity Manufacturer MFR# Capacitor Ceramic X7R 1u 0603 16V Cin31, Co31 2 Murata GRM188R71C105KA12D Capacitor Ceramic X7R 1n 0603 50V Css1 1 Vishay Generic Capacitor Ceramic X7R 10n 0603 16V Css2 1 Vishay Generic Capacitor Ceramic X7R 100n 0603 16V C2 1 Vishay Generic Capacitor Ceramic COG 39p 0603 50V Cc1 1 Vishay Generic Capacitor Ceramic X7R 22u 1210 16V 1 Murata GRM32ER71C226KE18L Capacitor Ceramic X7R 2.2u 0805 16V Co11 Cin11, Cin12, Cin21, Co21 4 Murata GRM21BR71C225KA12L Inductor Ferrite 3.3uH 7.6mm x 7.6mm L1 1 Toko 636CY-3R3M 5% Thick Film 10 Ohms 0603 Rin 1 Vishay Generic 1% Thick Film 20.0k 0603 Rf2 1 Vishay Generic 1% Thick Film 42.2k 0603 Rf1 1 Vishay Generic 1% Thick Film 200k 0603 Rc 1 Vishay Generic Integrated 1.2MHz PWM LFCSP-16 U1 1 Analog Devices ADP2106ACPZ 500mA 1.5V Linear Reg MSOP-8 U2 1 Analog Devices ADP1715ARMZ-1.5-R7 50mA 3.3V Linear Reg MSOP-8 U3 1 Analog Devices ADP1720ARMZ-3.3-R7 Table 4. Vout6 (12.0 V) Description Designator Quantity Manufacturer MFR# Capacitor Ceramic COG 100p 0603 50V Cc0 1 Vishay Generic Capacitor Ceramic X7R 3.3n 0603 50V Cc1 1 Vishay Generic Capacitor Ceramic X7R 1.0n 0603 50V Cc2 1 Vishay Generic Capacitor Ceramic X7R 1.0u 0603 16V Cpv 1 Murata GRM188R71C105KA12D Capacitor Ceramic X7R 100n 0603 16V Cvcc, Cz, Cb, Css 4 Vishay Generic Capacitor Ceramic COG 33p 0603 50V Clim 1 Vishay Generic Capacitor Ceramic X7R 22u 1210 25V Cin1 1 Murata GRM32ER71E226KE15L Capacitor Ceramic X7R 22u 1210 16V Co1 1 Murata GRM32ER71C226KE18L No pop 6.3mm 16V SMT Co2 0 Nippon APXE160ARA101MF80G Diode Zener 200mW SOD-323 5V6 Dlim 1 Diodes inc MMSZ5232BS Diode Schottky 200mA SOD-323 40V Db 1 Diodes inc BAT54H Inductor Ferrite 22uH 10.4mmx10.4mm L1 1 Toko B966BS-220M Single N-Channel MOSFET SOT-6 30V QL1,QH1 2 Vishay Si3456BDV Single NPN Bipolar SOT-23 40V Qpv 1 Vishay Si4684DY 1% Thick Film 3.00k 0603 Rz 1 Vishay Generic 1% Thick Film 270 Ohms 0603 Rzc 1 Vishay Generic 5% Thick Film 10 Ohms 0603 Rin, Rpv 2 Vishay Generic 1% Thick Film 20.0k 0603 Rf1, Rel 2 Vishay Generic 1% Thick Film 1.00k 0603 Rf2a 1 Vishay Generic 1% Thick Film 56 Ohms 0603 Rf2b, Rc2 2 Vishay Generic 1% Thick Film 2.70k Ohms 0603 Rlim 1 Vishay Generic 1% Thick Film 6.80k 0603 Rc1 1 Vishay Generic 1% Thick Film 10.0k 0603 Rpg 1 Vishay Generic 1% Thick Film 100k 0603 Reh 1 Vishay Generic 1 chan 300k to 600k PWM QSOP-16 U1 1 Analog Devices ADP1821ARQZ Rev. A | Page 10 of 11 Preliminary Technical Data FCDC 00043 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. EB Rev. A | Page 11 of 11