STEVAL-ISA075V1 STMicroelectronics

STEVAL-ISA075V1 Compact high efficiency DC-DC converter solution based on the L6738 Data brief Description The STEVAL-ISA075V1 product evaluation board is a compact solution designed for testing the performance of the L6738. The L6738 is a single-phase step-down controller with integrated high-current drivers that provides complete control logic and protection for DC-DC converters. Features Compact size (25.4 mm x 14.6 mm) 4 layers V < 6 V IN V up to 3.5 V OUT I up to 8 A (depending on V ) OUT OUT F = 600 KHz SW Dual power MOS option (2 x STL 3x3 or 1 x Dual SO8) C = 2 x GRM21BR60J226ME39 (22 uF,6.3 V, IN 0805) C = 2 or 3 x GRM31CC70G226KE01 OUT (22 uF, 4 V, 1206) Dual choke options (WE 744310095 or VITEC 59Px8970) RoHS compliant January 2014 DocID025790 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.comSchematic diagram STEVAL-ISA075V1 1 Schematic diagram Figure 1. STEVAL-ISA075V1 circuit schematic 8 7 3 6 2 5 1 GSPG0310DI1500 2/4 DocID025790 Rev 1 RR22 RR6116 222RR2 222RR2 VIN PHASE VCC DR VIN VCC VIN J3JPPWWRR3 22PPIINN VIN VIN UGATE 4 QbQHHSSb LSG1 4 QbQLLSSb 1 CC8338 CC4114 CC1111 CC1122 STL15N3LLH5STL15N3LLH5 STL15N3LLH5STL15N3LLH5 56 2 10uF 16V 080510uF 16V 0805 10uF 16V 080510uF 16V 0805 1uF 16V 06031uF 16V 0603 1uF 16V 06031uF 16V 0603 PHASE GND UGATE 4 0 QQaHHSSa 0 0 3 0 0 STS9D8NH3LLSTS9D8NH3LL BOOT POWER IN OPTIONS CC0110 L2L2 222200nnFF 950nH - 6.2mOhm950nH - 6.2mOhm J4JPPWWRR4 RR1OOSSCC1 VCC WE 744310095WE 744310095 22NPPIIN 33k00k PHASE 2 1 OUT 1 RRTTCCMM11 2 66k88k C3C443 C4C444 C5C445 78 GND CSP RR55 22uF 4V 120622uF 4V 1206 22uF 4V 120622uF 4V 1206 NCNC 223RR22 0066003 QaQLLSSa 0 LGATE LSG1 2 STS9D8NH3LLSTS9D8NH3LL JJPP33 R1R551 RRTTCCMM22 C1CTTCCMM1 11R0000R 0 1 0 0 0 2200kk 1F100nnF J1JPP1 JJ2PP2 UU1DD1 0 CSN VSS SENSE CC3DD3 PLACE ON THE BOTTOM VCC DR 1 12 11F0000nnF CSP CSN VCC SENSE 0 VCCDR CSN LGATE 2 11 VSS SENSE LGATE FBG S8STT LL6677338 PHASE 3 10 VSEN PHASE VSEN BOOT 4 9 FB BOOT FB COMP OUT SYNC PGOOD RR9119 11k00k UGATE R7R7 C4C224 RR99 VCC SENSE 88..66kk 1F1..55nnF 22..77kk PGOOD RR66 CC5335 RR4114 CC3366 ==RR99 66F88ppF 2R24400R 22F..22nnF VSEN PGOOD Pull-Up RR3113 =)=FF((VVoouutt) RR88 =3=RR113 VSS SENSE R13 = F(Vout) = = 0.8V * R9 / ( Vout - 0.8V ) = = 2.16k / ( Vout - 0.8V ) 17 EPAD 5 UGATE 16 GND 6 PGOOD 15 VCC 7 SYNCH 14 OSC / EN 8 COMP 13 CSP COMP FFBFBB 1 2 1 2 1 5 2 6 3 7 8 1 2