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L6738A Datasheet(PDF) 10 Page - STMicroelectronics |
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L6738A Datasheet(HTML) 10 Page - STMicroelectronics |
10 / 32 page Pin description and connection diagrams L6738A 10/32 Doc ID 18134 Rev 2 2.2 Thermal data 8COMP Error amplifier output. Connect with an RF - CF to FB. The device cannot be disabled by grounding this pin. 9FB Error amplifier inverting input. Connect with a resistor RFB to VSEN and with an RF - CF to COMP. 10 VSEN Output voltage monitor. It manages OVP and UVP protections and PGOOD. Connect to the positive side of the load for remote sensing. See Section 6 for details. 11 FBG Remote ground sense. Connect to the negative side of the load for remote sensing. 12 CSN Current sense negative input. Connect to the output-side of the main inductor. Filter with 100 nF (Typ.) to GND. 13 CSP Current sense positive input. Connect through an R-C filter to the phase-side of the main inductor. 14 OSC OSC: Internally set to 1.24 V, it allows programming the switching frequency FSW of the device. Switching frequency can be increased according to the resistor ROSC connected to SGND with a gain of 10 kHz/µA (see Section 7 for details). If floating, the switching fre- quency is 200 kHz. 15 VCC Device power supply. The embedded bootstrap diode is internally connected to this pin. Operative voltage is 5 V to 12 V bus. Filter with 1 µF MLCC to GND. For proper operations, VCC needs to be >1.5 V higher than the programmed VOUT. 16 GND All internal references, logic and driver return path are referenced to this pin. Connect to the PCB GND ground plane and filter to VCC and VCCDR. Thermal PAD The thermal pad connects the silicon substrate and makes good thermal contact with the PCB. Use VIAs to connect to the PGND plane. Table 2. Pin description (continued) Pin# Name Function Table 3. Thermal data Symbol Parameter Value Unit RTHJA Thermal resistance junction to ambient (Device soldered on 2s2p PC Board) 45 °C/W RTHJC Thermal resistance junction to case 1 °C/W TMAX Maximum junction temperature 150 °C TSTG Storage temperature range -40 to 150 °C TJ Junction temperature range -40 to 125 °C |
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