Datasheet A7987 (STMicroelectronics) - 2

A7987 Application schematic 1 Application schematic Figure 1. Application schematic
R1 PGOOD U1 7 12 SYNCH PGOOD 2 1 VIN VOUT VIN VBIAS 3 VIN 15 BOOT C7
7987
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A
VCC 5 13 EN LX 14 L1 6 LX SS R5 C8 9 100 V 100 V 10 FB FSW 11 R6 C9 R7 8 ILIM TP GND COMP C11 17 16 D1 C1 C4 C10 R11 C5 GND GND
DS12928
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Rev 1 page 2/37
Document Outline Cover image Product status link / summary Features Applications Description 1 Application schematic 2 Block diagram 3 Pin settings 3.1 Pin connection 3.2 Pin description 3.3 Maximum ratings 3.4 Thermal data 3.5 ESD protection 4 Electrical characteristics 5 Functional description 5.1 Oscillator and synchronization 5.2 Soft-start 5.3 Error amplifier and light-load management 5.4 Low VIN operation 5.5 Overcurrent protection 5.6 Overtemperature protection 6 Application information 6.1 Input capacitor selection 6.2 Output capacitor selection 6.3 Inductor selection 6.4 Compensation network 6.4.1 Type II compensation network 6.4.2 Type III compensation network 6.5 Thermal considerations 6.6 Layout considerations 7 Demonstration board 8 Application ideas 8.1 Positive buck-boost 8.2 Negative buck-boost 9 Package information 9.1 HTSSOP16 package information 10 Ordering information Revision history