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RT3602AE Datasheet(PDF) 39 Page - Richtek Technology Corporation |
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RT3602AE Datasheet(HTML) 39 Page - Richtek Technology Corporation |
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39 / 46 page  39 RT3602AE DS3602AE-00 August 2017 www.richtek.com © Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Table 6. SET[1 to 2] pins setting for kTON, ki and ANTIOVS SET[1 to 2]_I R2 V80μA R1 R2 TONSET_X AI_X ANTIOVS_X Min Typ Max Unit AUXI MAIN 60.07331 75.07331 90.07331 mV 0.6 20 1 Disable 160.1711 175.1711 190.1711 mV Enable 260.2688 275.2688 290.2688 mV 80 2 Disable 360.3666 375.3666 390.3666 mV Enable 460.4643 475.4643 490.4643 mV 0.8 20 1 Disable 560.5621 575.5621 590.5621 mV Enable 660.6598 675.6598 690.6598 mV 80 2 Disable 760.7576 775.7576 790.7576 mV Enable 860.8553 875.8553 890.8553 mV 1 20 1 Disable 960.9531 975.9531 990.9531 mV Enable 1061.051 1076.051 1091.051 mV 80 2 Disable 1161.149 1176.149 1191.149 mV Enable 1261.246 1276.246 1291.246 mV 0.4 20 1 Disable 1361.344 1376.344 1391.344 mV Enable 1461.442 1476.442 1491.442 mV 80 2 Disable 1561.54 1576.54 1591.54 mV Enable For example, 35mV QR threshold and 1.3 x TON QR width are set. According to Table 2, the set voltage should be between 1.261V and 1.291V. Please note that a high accuracy resistor is needed for this setting accuracy, <1% error tolerance is recommended. Zero Load-Line Setting and Anti-overshoot function The TSEN_MAIN can be enabled/disabled zero-load-line function for SA rail. The SET1 and SET2 pins can be enabled/disabled anti-overshoot function for MAINandAUXI rails. When DVID slew rate increases, loop response is difficult to meet energy transfer so that output voltage generates overshoot to fail specification. The RT3602AE has anti- overshoot function being able to help improve this issue. The VR will turn off low-side MOSFET when output voltage ramps up to the target VID (ALERT signal be pulled low). This function also can improve the overshoot during the load transient condition. When anti-overshoot function is triggered, the UGATE and LGATE signal will be masked to reduce the overshoot amplitude. In order to increase high power density performance, Dr.MOS is popular to use in VR application. In PS4 mode the Dr.MOS is required to enter power saving mode. So the RT3602AE provide DRVEN_SET pin for different Dr.MOS. When DRVEN_SET is set to VCC, DRVEN is floating at PS4 mode. Moreover, the DRVEN is pull to low at DRVEN_SET connected to GND. |
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