STEVAL-ISA053V1

STEVAL-ISA053V1 Demonstration board for the PM6680 dual step-down controller with adjustable output voltage for notebook power system Data Brief Features Constant on-time control allows very fast load transients 6 V to 28 V input voltage range 5 V auxiliary output voltage Accurate current limit with sense resistor Adjustable switching outputs Lossless current sensing Negative current limit Soft-start internally fixed at 2.8 ms Soft-end for output discharge 200 kHz / 300 kHz, 300 kHz / 400 kHz, 400 kHz / 500 kHz (5 V / 3 V selectable switching frequency) STEVAL-ISA053V1 Selectable pulse skip and no-audible skip modes at light loads Independent Power Good signals Description The PM6680 is a dual step-down controller with adjustable output voltages for notebook computer power systems. The STEVAL-ISA053V1 demonstration board is designed to test the performance of the PM6680 by employing a typical application circuit which allows testing of all PM6680 device functions. The board features two switching sections, with (typically) 1.5 V and 1.05 V outputs, from a 6 V to 28 V input battery voltage. The operating switching frequency of the two switching sections is 200 kHz / 300 kHz, respectively. Each switching section delivers more than 5 A of output current. Moreover, an internal linear regulator can provide 5 V 100 mA peak current. September 2008 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4 Obsolete Product(s) - Obsolete Product(s)Circuit schematic STEVAL-ISA053V1 1 Circuit schematic Figure 1. Schematic diagram 2/4 Obsolete Product(s) - Obsolete Product(s) J3J3JJ33 LLLDO5V+LDO5V+DDOO55VV++ VINVIN R26RRR262266 V+V+ DD1D1D11 1 JJJ5J555 ++VIN++VINVVIINN ++ ++ 2 BOOT1BOOT1 33R933R9RR99 CINCCCINIINN ++ C19CCC191199 C26CCC262266 CC1CC111 C2CCC222 NNMNNMMM VVININ RR9RR999 C20CC20C2200 CC21CC212211 RLD5VRRRLD5VLLDD55VV 44u74u74uu77 VV++ 3 100n1100n10000nn 1115u15u55uu 15u15u1155uu 447R447R77RR 111uF1uFuuFF 4u744u74uu77 100K100K110000KK BOOT2BOOT2 J2JJJ222 1 1 ---VIN-VINVVIINN CCC3C333 CC4CC444 BBAT54A/SOTBAT54A/SOTBAATT5544AA//SSOOTT SSGNDGND SSGNDGND PPGNDGND PGNDPGND PGNDPGND 15u115u155uu 15u115u155uu SGNDSGND SGNDSGND SGNDSGND PPGNDGND CC22CC222222 V+V+ RR6RR666 R5RR5R55 SSGNDGND PPGNDGND PPGNDGND R10RR10R1100 220nF2220nF22200nnFF NNNMNMMM BOOT1BOOT1 R11RR11R1111 NNMNMNMM CCC14C141144 R4RRR444 UUU1U111 BBOOT2OOT2 RR3R3R33 C13CCC131133 10R10R1100RR C6CCC666 10R1110R00RR NMNMNNMM NNMNMNMM 1100n1100n0000nn CC5CC555 NMNNNMMM NMNNMNMM OOUT5VUT5V S5SS5S55 M2MM2M22 RR22RR222222 M1M1MM11 SS4SS444 2323 9 100n11100n0000nn BBOOT1OOT1 BBOOT2OOT2 JP2SOJJJP2SOPP22SSOO MOSFET-N-SO8MOSFET-N-SO8MMOOSSFFEETT--NN--SSOO88 MMOSFET-N-SO8MMOSFET-N-SO8OOSSFFEETT--NN--SSOO88 JJP2SOJJP2SOPP22SSOO 4 4 JJ4JJ444 LL2LL222 R20R20RR2200 LL1LL111 J1JJ1J11 0R00R0RR 2222 1010 HHGATE1GATE1 HGATE2HGATE2 1 2 1 1 2 1 00R00RRR M4MMM444 3V333V33VV33 2211 1111 55V55VVV PPHASE1HASE1 PPHASE2HASE2 OOUT1+OUT1+OUUTT11++ MMOSFET-N-SO8MOSFET-N-SO8MOOSSFFEETT--NN--SSOO88 R18RR18R1188 OOUT2+OOUT2+UUTT22++ RR23R23R2233 MM3M3M33 SSS8S888 560K5560K56600KK S9SSS999 4 1515 1133 R2R2RR2211 0R0R00RR 4 MMMOSFET-N-SO8MOSFET-N-SO8OOSSFFEETT--NN--SSOO88 JP3SOJJP3SOJPP33SSOO LGATE1LGATE1 LGATE2LGATE2 JP3SOJP3SOJJPP33SSOO RR19R19R1199 CC24C24C2244 ++CCC7C777 ++CCC8C888 100n1100n10000nn ++ CC11CC111111 ++ C12CCC121122 DDD2D222 560K560K556600KK 000R0RRR R8RRR888 DD3D3D33 NNMNMNMM NNMNNMMM CCC25C252255 3330uF3330uF3300uuFF 330uF3330uF33300uuFF SMASMASSMMAA 2200 1212 RR77 55500R500R0000RR SMASSMASMMAA CCSENSE1SENSE1 CCSENSE2SENSE2 1100n100n10000nn CC9C9C99 500R55500R0000RR C10CC10C1100 100n100n110000nn JJ9JJ999 1717 1144 VV5SW5SW PGNDPGND VV5SW5SW PPGNDGND 100n100n110000nn 1 J8JJJ888 2929 1 OUT5VOUT5V OOUT1UT1 SSGNDGND SSGNDGND OUT2-OOOUT2-UUTT22-- 1 PPGNDGND 3300 8 COMP1COMP1 OOUT2UT2 C15CC15C1155 R25RR25R2255 OOUT1-OOUT1-UUTT11-- PPGNDGND LDO FBLDO FB 1616 2 LDO FBLDO FB CCOMP2OMP2 RRR24R242244 CC16C16C1166 SS1SS11122 JJJP2SOJP2SOPP22SSOO J10JJ10J1100 11150pF150pF5500ppFF 11K11KKK RR1RR11122 100K100K110000KK CC17CC171177 2626 6 2 1 VV++ PPGOOD1GOOD1 FFB2B2 NNMNMNMM PPGNDGND 1 LIKE 4-PIN JUMPERLIKE 4-PIN JUMPER 100pF11100pF0000ppFF RR30R30R3300 1K11K1KK R1RRR11133 11100K100K0000KK FFB1B1 AA - S12 CLOSED - S12 CLOSED 2277 2288 V+V+ PGOOD2PGOOD2 FFB1B1 B - S14 CLOSEDB - S14 CLOSED SGNDSGND CC18CC181188 PGNDPPGNDPGGNNDD SS1S1S1133 JJJP2SOJP2SOPP22SSOO CC - S12.1 TO S14.2 - S12.1 TO S14.2 NMNNMNMM VINVIN RR28RR282288 JJ6JJ666 5 7 2 1 SHDNSHDN LDOLDO PPGOOD1PPGOOD1GGOOOODD11 ++ JJ7J7J77 1 FB1FB1 SGNDSGND C27C27CC2277 CCC28C282288 R33R33RR3333 LLDO ADJLLDO ADJDDOO AADDJJ R29RR29R2299 RR17RR171177 PPGOOD2PPGOOD2GGOOOODD22 4u74u744uu77 11uF1uF1uuFF 560K55560K6600KK RR32R32R3322 R27R27RR2277 SGNDSGND SS1S1S11 SSGNDGND SSGNDGND SGNDSGND PM6681 VFQFPN32PPPM6681 VFQFPN32MM66668811 VVFFQQFFPPNN3322 1 LLDO FBDO FB 2 3 SSGNDGND 1100K1100K0000KK RR15R15R1155 V+V+ SSGNDGND JP3SOJP3SOJJPP33SSOO R31R31RR3311 C23CC23C2233 RR16RR161166 1100K1100K0000KK RR14RR141144 V+V+ 11100K100K0000KK 110pF110pF00ppFF VV++ SSGNDGND S2SSS222 SSWDIP-4SWDIP-4SWWDDIIPP--44 SGNDSGND SSGNDGND CREFCCREFCRREEFF 100n11100n0000nn SSS10S101100 S3SS3S33 JP4IJJJP4IPP44II JJP4IJJP4IPP44II J11JJ11J1111 V5SWV5SW SGNDSGND EEXT5VEEXT5VXXTT55VV OOUT5VUT5V SSGNDGND SGNDSGND SSGNDGND SS11SS111111 JP4IJP4IJJPP44II SGNDSGND 1 2 3 1 2 2 1 2 8 8 3 7 3 7 1 3 2 6 2 6 1 5 1 5 4 1 8 2 7 3 6 4 5 4 EN2 31 VCC 25 EN1 32 18 VREF LLDODO5 24 SKISKIP 19 VIN 3 FFSESEL 2 1 3 4 2 1 3 4 1 5 1 5 2 6 2 6 3 7 3 7 8 8 2 1 1 2 1 2 3