Datasheet RT1720 (Richtek) - 6

RT1720 Parameter Symbol Test Conditions Min Typ Max Unit
Over Voltage, VFB = 1.4V, 55 80 -- VGATE = 12V Over Current, V  V GATE Pull-Down Current I CC SNS = GATE_ON -- 3 -- mA 120mV, VGATE = 12V Shutdown Mode, SH ̅̅̅̅D ̅̅ N ̅̅̅ = 55 80 -- GND, VGATE = 12V FB Servo Voltage VFB VOUT = 12V 1.2 1.25 1.3 V FB Input Current IFB VFB = 1.25V -- 0.3 1 A Over Current Fault V  CC = 12V 45 50 55 V mV Threshold SNS (VCC VSNS) VCC = 48V 43 48 53 SNS Input Current ISNS VSNS = VCC = 12V to 48V -- 120 -- A F ̅ L ̅ T ̅̅̅, PGOOD Leakage V V = 10V, I PGOOD = FLT -- -- 2 A Current LEAK SH ̅̅̅̅D ̅̅ N ̅̅̅ = GND V TMR Pull-Up Current I TMR = 1V, VFB = 1.5V, or TMR_UP  -- 25 -- A VSNS = 60mV V TMR Pull-Down Current I TMR = 1V, VFB = 1V, or TMR_DOWN  2.5 3.5 5 A VSNS = 0V TMR Fault Threshold V Voltage TMR_F FLT changes state 1.14 1.2 1.26 V TMR GATE Off Threshold VTMR_L GATE turns off -- 1.4 -- V TMR GATE On Threshold VTMR_UL GATE turns on -- 0.5 -- V F ̅ L ̅ T ̅̅̅, PGOOD Output Low ISINK = 2mA -- 300 500 V mV Voltage OL ISINK = 0.1mA -- 120 300 VOUT = VCC = 12V -- 200 500 A VOUT Pin Input Current IOUT VOUT = VCC = 12V, SH ̅̅̅̅D ̅̅ N ̅̅̅ -- -- 2 mA = GND VOUT = VCC VOUT ; VOUT High Threshold VOUT 0.4 0.8 1.1 V PGOOD from Low to High SH ̅̅̅̅D ̅̅ N ̅̅̅ Logic-High VCC = 12V to 48V 2.5 -- -- V Input Voltage Logic-Low VCC = 12V to 48V -- -- 0.5 V SH ̅̅̅̅D ̅̅ N ̅̅̅ Input Current IS̅HD ̅̅̅̅̅ N ̅̅̅ VS̅HD ̅̅̅̅̅ N ̅̅̅ = 3V -- 0.4 -- A
Note 1.
Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect device reliability.
Note 2.
JA is measured at TA = 25C on a high effective thermal conductivity four-layer test board per JEDEC 51-7.
Note 3.
Devices are ESD sensitive. Handling precaution recommended.
Note 4.
The device is not guaranteed to function outside its operating conditions.
Note 5.
GATE to VOUT voltage is internally generated and clamped with specification shown in the electrical characteristics table. External driving at GATE pin is forbidden because it may damage the device.
Note 6.
All currents into device pins are positive, all currents out of device pins are negative. All voltages are referenced to GND unless otherwise specified. Copyright © 2015 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS1720-01 November 2015 6