AS7620EB ams

DemoBo ard Dat a Sh eet AS7620 Evaluation Board 500mA Hysteretic High Voltage Step-Down Converter with Dual Power Monitor 1 General Description 2 Key Features Convenient test point loops for input, output, A demonstration board is available to test AS7620 shutdown and power monitor flags functionalities and performance in a standard application. High Voltage ceramic capacitor for output voltages Default conditions are VIN=24V and VOUT=5V, but in of up to 15V principle the input voltage can range from 5V to 32V. Micro-power LDO generates 3.3V for flag outputs, While the AS7620 output voltage can range from 1.2V to supplies up to 250mA VIN, the demonstration board upper output voltage Single-sided assembly allows convenient backside limitation is 15V. access for modification The output voltage can be easily adjusted using the Large-size 0805 parallel pads for all configuration 0805-sized output resistor divider pads on the back of resistors the evaluation board. Alternate landing pads for output inductor and capacitor Quiet GND probe point minimizes GND loop area and noise Figure 1. Demo Board Photograph www.austriamicrosystems.com Revision 1.00 1 - 8AS7620 Evaluation Board DemoBoard Data Sheet - Schematic & BOM 3 Schematic & BOM In Figure 2, the bold lines indicate high current paths. Components placed on both TOP and BOTTOM side are highlighted in the schematic. Figure 2. Schematic and BOM (3.3V) (5.0V) Vbias VOUT U2A VOUT Vbias 2 3 + tp-rct C6 - tp-rct C5 TP1 1F 0.1F SHDN AS1360-33-T tp-rct TP4 TP2 tp-rct PG NoPoP tp-rct TP3 PF R9 0 tp-rct R5 2M NoPoP 2.7M 6 10 R6 5 11 R8 0 100K 4 12 (24V) R7 C4 R1 Pad L10 47pF 931K VIN R3 R4 2.2M 150K R2 VIN L1 10H 287K D1 tp-rct C2 C1 C3 100F MA22D39 4.7F 0.1F GND1 GND tp-rct tp-rct Note: High current path indicated with bold blue line www.austriamicrosystems.com Revision 1.00 2 - 8 R40 R30 R60 9 1 U1 8 2 1 3 AS7620-A 7 C20 R10 C40 R20