STEVAL-ISA051V1

STEVAL-ISA051V1 Complete DDR2/3 memory power supply controller evaluation board based on the PM6670S Data Brief Features ■ 4.5 V to 28 V input voltage range ■ 0.9 V, ±1% voltage reference ■ 1.8 V (DDR2) or 1.5 V (DDR3) fixed output voltages ■ 0.9 V to 2.6 V adjustable output voltage ■ 1.237 V ±1% reference voltage available ■ Very fast load transient response ■ Constant on-time loop control ■ No RSENSE current sensing using the RDS(on) of the low-side MOSFETs ■ Negative current limit ■ Latched OVP, UVP and thermal shutdown ■ Fixed 3 ms soft-start ■ Selectable pulse-skipping at light load ■ Selectable no-audible (33 kHz) pulse-skip mode ■ All ceramic output capacitors application supported ■ Output voltage ripple compensation ) s ( ct u d o r P e t e l o ) (s STEVAL-ISA051V1 s b O The device is fully compliant with system sleep states S3 and S4/S5, providing LDO output high impedance in suspend-to-RAM and tracking discharge of all outputs in suspend-to-disk. t c u d o r P e t e l o Description This evaluation board is based on the PM6670S and represents a complete DDR2/3 power supply regulator for portable applications designed to meet JEDEC specifications. It integrates a constant on-time (COT) buck controller, a 2 Apk sink/source low drop-out regulator and a 15 mA low noise buffered reference. The COT architecture assures fast transient response supporting both polymeric and ceramic output capacitors. An embedded integrator control loop compensates the DC voltage error due to the output ripple. The 2 Apk sink/source linear regulator provides the memory termination voltage with fast load transient response. s b O February 2008 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 2 3 1 JP4 STRIP 3 1 TP8 GND TP9 _1S8 VOUT_1 VCC 1 C1 0603-10 -100p 06 C29 + C5 10u EL SMD C-10 R6 0603-12 060 -120k R5 0603-15 060 -150k 0603-1u 0603 0603-100n 06 C16 C22 0603-330 0603 330p R11 0603 100k 0603-100 VIN C6 20u B Case - 220 06 -22n 0603-22n C19 0603 603-15 15p C32 C2 0805-1 5-10u 08 C15 B Case - 220u 2 C21 2 3 1 TP1 VTTREF 2 THERMAL R10 060303-180k 80k R9 03-56k 6k 0603- C12 805-10 10u 0805 0603-33 33n 0603 C18 1 U1 6641_Q 1_QFPN PM66 VOUT_1S05 1 TP12 03-100p 0603-1 C31 TP16 AGND C11 1206 206-22 22u AVCC L3 283 2839-1u C9 B Case - 220u EN_VTT EN_1 _1S5 EN_1 _1S05 VIN_1 _1S5 VSW_1 VS _1S5_ 5_2 VSW_1 VS _1S5_ 5_1 SGND_1 _1S5_ 5_2 SGND_1 _1S5_ 5_1 VFB_1 _1S5 COMP_1 _1S5 SS_1 _1S5 PG_1 _1S5 36 35 34 33 32 31 30 29 28 27 26 25 2 AVCC JP3 STRIP 3 GND 1 TP13 C10 B Case - 220 20u + 1 2 2839-1u 1u5 2839 R31 0603-joi 03-join 1 2 C13 10u EL SMD C-10 C14 C4 08 0805-10u -10u VIN C23 060303-470p 70p L2 C34 0603-1 3-15p 06 C20 060 0603-22n -22n R12 0603603-47k 7k 1 VCC GND TP17 10u EL SMD C-10 + JP6 STRIP 3 C24 060303-330p 30p C17 R2 06 0603-4 3-4R3 03-100n 0603-1 AGND ND_1 SET_SWF SE VOUT_1S8 CSNS SGND ND_1S8_1 SGND ND_1S8_2 VSW_1S8_ VS 8_1 VSW_1S8_ VS 8_2 VIN_1S8_1 VIN_1S8_2 VFB_1S8 COMP_1S8 0603-15 0603 15p C33 49 1 2 3 4 5 6 7 8 9 10 11 12 R33 603-join 0603 1 TP14 VTT 1 AVCC AV R13 060303-68k 06 0603-joi 3-join R32 R4 0603 68k 0603-68 JP1 STRIP 3 39-1u 2839- 603-22 22n 0603 L1 2 1 STRIP 2 JP8 2 1 1 STRIP 2 1 R3 0603 0603-100 100k AVCC R1 06 -4R3 0603-4 JP7 1 1 AVCC AV 1 2 AVCC AV 1 TP15 LDOIN 2 1 TP6 AGND 3 2 48 47 46 45 44 43 42 41 40 39 38 37 VCC VTT_FB DSCG VTTREF LDO_IN VTT VTT_GND AVCC AGND ND_2 SE SET_PH1 AGND ND_3 EN_1S8 SS_1S8 SS_1S05 COMP_1S05 VFB_1 _1S05 SGND ND_1 _1S05_1 SGND ND_1 _1S05_2 VSW_1S05_ 5_1 VSW_1S05_ 5_2 VIN_1 _1S05_1 VIN_1 _1S05_2 PG_1 _1S05 PG_1 _1S8 13 14 15 16 17 18 19 20 21 22 23 24 3 1 TP5 VCC 1 VIN R30 0603 0603-joi join AUX 060 0603-100p -100p C26 R20 03-68k 8k 0603- 1 VIN TP7 R17 03-68k 0603- R18 0603-68k -68k 060 AUX 0603-100 100p 0603 C30 C7 B Case - 220u C3 0805 0805-10 10u 0603 603-100 100p C25 R34 06 0603-joi 3-join TP18 AUX R22 603-68 68k 0603 AUX R8 0603 0603-120 120k R7 0603 0603-100 100k 8 7 6 5 TP4 PG_1 _1S05 SW DIP-4 SW1 JP5 STRIP 3 1 2 3 4 TP2 PG_1S8 2 0603-10 06 -100p C28 R23 603-68 68k 0603 TP3 PG_1S5 C8 10u EL SMD C-10 06 0603-100p C27 R19 0603-68k 060 -68k + R21 603-68 68k 0603 1 2 1 u d o 1 r P e 2 3 1 1 2/4 P e d o r t c u s b O t e l o 1 s b O t e l o ) (s TP10 VOUT_1S5 TP11 GND 1 Figure 1. 1 1 1 Circuit schematic STEVAL-ISA051V1 Circuit schematic Schematic ) s ( ct STEVAL-ISA051V1 2 Revision history Revision history Table 1. Document revision history Date Revision 11-Feb-2008 1 Changes Initial release. ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o s b O 3/4 STEVAL-ISA051V1 Please Read Carefully: ) s ( ct Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. u d o All ST products are sold pursuant to ST’s terms and conditions of sale. r P e Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. t e l o No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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