STEVAL-ISA206V1 STMicroelectronics

STEVAL-ISA206V1 Data brief 38 V, 2 A synchronous step-down switching regulator evaluation board based on L6986H Features 2 A DC output current 4 V to 38 V operating input voltage. Low consumption mode or low noise mode Programmable I current SKIP 30 A I at light load (LCM V = 12 V and V = 3.3 V) Q IN OUT 8 A I Q-SHTDWN Adjustable f (250 kHz - 2 MHz) SW Output voltage adjustable from 0.85 V to V IN Embedded output voltage supervisor Synchronization (in all f range) SW Adjustable soft-start time Internal current limiting Overvoltage protection Output voltage sequencing Peak current mode architecture R = 180 m R = 150 m DS(on)HS DS(on)LS Thermal shutdown RoHS and WEEE compliant Product summary Description 38 V, 2 A synchronous The STEVAL-ISA206V1 product evaluation board is based on the L6986H step-down switching STEVAL- synchronous step-down switching regulator that can deliver up to 2 A and withstand regulator evaluation board ISA206V1 cold cranking across 100% duty cycle, which, along with its wide input operating based on L6986H voltage range, render the L6986H the ideal choice for 12 V - 24 V industrial standard 38 V, 2 A synchronous Bus. step-down switching L6986H Synchronous rectification helps to achieve higher efficiency at full load as well as regulator with 30 uA application compactness, while high-frequency switching (programmable up to 2 quiescent current MHz) helps to cut on power passive costs and size while staying outside of the AM band. The device can operate in a low consumption mode (LCM) with a quiescent current down to 30 A at V = 12 V and V = 3.3 V, hence assuring high efficiency at light IN OUT loads, as required by typical car body applications that active during car parking. A low noise mode (LNM) is also available to meet the requirements of infotainment applications of forced PWM mode in all loading conditions. The default configuration of the board is output voltage set to 3.3 V configured in LCM, 500 kHz switching frequency, I current set to high level and the switchover SKIP feature disabled. All of these configurations can be easily changed by the user to evaluate different application scenarios. DB3890 - Rev 1 - April 2019 www.st.com For further information contact your local STMicroelectronics sales office.STEVAL-ISA206V1 Schematic diagram DB3890 - Rev 1 page 2/4 1 Schematic diagram Figure 1. STEVAL-ISA206V1 board schematic TP1 R11 10 R5 NM TP2 RST SS/INH R10 NM U1 A6986H TP3 R6 1M TP4 4 1 VOUT SYNCH SYNCH RST J3 15 16 VIN FLT VIN VBIAS L1 10uH 2 13 VCC LX 14 J5 R3 NM LX L1A NM 5 FSW J2 R1 0 6 MLF C7 NM 9 FB 3 SS/INH R8 75k C8 330p R9 82k R7 240k 8 7 DELAY COMP + C11 C3 R2 R4 + C4 2.2p NM 0 EP SGND PGND PGND NM 470nF 10V C5 C6 17 10 11 12 J1 68nF 10nF si gnal GND TP7 PGND power GND GND J4 size XAL5030 Coilcraft TP8 L3 TP5 L2 4.7uH VIN FLT VIN MPZ2012S221A VIN EMI size 0805 TP6 PGND GND C13A NM C16 4.7F NM C13 si ze 1206 si ze 1206 C1 10F 50V C2 1F 50V C15 4.7F si ze 1206 C14 4.7F si ze 1206 si ze 1206 C9 10F 50V C10 10F 50V si ze 1206