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L6706TR Datasheet(PDF) 7 Page - STMicroelectronics |
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L6706TR Datasheet(HTML) 7 Page - STMicroelectronics |
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7 / 47 page  L6706 Pins description and connection diagrams Doc ID 15698 Rev 2 7/47 8LTB Load transient boost pin. Internally fixed at 2 V, connecting a RLTB - CLTB vs. VOUT allows to enable the load transient boost technology™: as soon as the device detects a transient load it turns on the PHASE. Short to SGND to disable the function.See “Load transient boost technology” Section for details. 9IMON Current monitor output pin. A current proportional to the load current is sourced from this pin. Connect through a resistor RMON to SGND (or FBG) to implement a load indicator. The pin voltage is clamped to 1.1 V max. 10 LTBGAIN Load transient boost technology™ gain pin. Internally fixed at 1.24 V, connecting a RLTBGAIN resistor vs SGND allows setting the GAIN of the LTB action. See See “Load transient boost technology” Section for details. 11 OFFSET Offset programming pin. Internally fixed at 1.240 V, connecting a ROFFSET resistor vs. SGND allows setting a current that is mirrored into FB pin in order to program a positive offset according to the selected RFB. Short to SGND to disable the function. See “Offset (optional)” Section for details. 12 OVPSEL Over voltage programming pin. Internally pulled up by 20 µA (min) to 3.3 V. Leave floating to use built-in protection thresholds (OVPTH= VID + 175 mV typ). Connect to SGND through a ROVP resistor and filter with 100 pF (max) to set the OVP threshold to a fixed voltage according to the ROVP resistor.See “Over voltage and programmable OVP” Section for details. 13 OCSET Over current setting, psi action pin. Connect to SGND through a ROCSET resistor to set the OCP threshold. See “Overcurrent protection” Section for details. 14 OSC/ FAULT Oscillator, fault pin. It allows programming the switching frequency FSW. Frequency is programmed according to the resistor connected from the pin vs. SGND or VCC with a gain of 9.1 kHz/µA (see relevant section for details). Leaving the pin floating programs a switching frequency of 200 kHz. The pin is forced high (3.3 V typ) to signal an OVP/UVP fault: to recover from this condition, cycle VCC or the OUTEN pin. See “Oscillator” Section for details. 15 SSOSC/ FLIMIT Soft-start oscillator pin. By connecting a resistor RSS to GND, it allows programming the soft-start time. Soft-start time TSS will proportionally change with a gain of 25 [µs / kΩ]. The same slope implemented to reach VBOOT has to be considered also when the reference moves from VBOOT to the programmed VID code. The pin is kept to a fixed 1.240 V. See “Soft-start” Section for details. It also allows to select maximum LTB frequency. See “Load transient boost technology” Sectionfor details. Table 2. Pin description (continued) N° Name Description |
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