Datasheet AP68255Q (Diodes) - 6

AP68255Q/AP68355Q Electrical Characteristics
(TA = +25°C, VIN = 48V, unless otherwise specified. Min/Max limits apply across the recommended junction temperature range, -40°C to +150°C, and input range from 5.5V to 80V, unless otherwise specified.)
Symbol Parameter Test Conditions Min Typ Max Unit
VIN Power On Reset Threshold — 4.7 5.0 5.3 V UVLO Hysteresis — — 440 — mV ISHDN Shutdown Supply Current VEN = 0V, VEN_LDO = 0V — 5.6 20 µA VEN = Open, VEN_LDO = 0V, IQ Supply Current (Quiescent) VBIAS = 0V, VBST - VSW = 5V, — 140 240 μA Non-Switching RDS(ON)1 High-Side Switch On-Resistance — — 500 950 mΩ VIN > 9V, AP68255Q 3.0 4.0 5.5 A ILIMIT HS Peak Current Limit VIN > 9V, AP68355Q 4.0 5.0 6.5 A ISW_LKG Switch Leakage Current VEN = 0V, VSW = 0V, VIN = 80V — — 5 μA FSW Oscillator Frequency — 260 300 340 kHz TOFF Minimum Off-Time — — 200 260 ns DMAX Maximum Duty Cycle (Note 8) — — 93 — % VFB Feedback Voltage — 1.182 1.200 1.218 V TSS Soft-Start Period — — 4 — ms EN Rising Threshold — — 1.25 — V VEN_TH Hysteresis — — 10 — mV IEN_L EN Pull-Up Current VEN = 0V — 0.3 — μA IEN_H EN Pull-Up Current VEN = 1.5V — 2.1 — μA Rising Edge — 120 — % VOVP % of VFB — — 115 — % TSHDN Thermal Shutdown (Note 8) — — +160 — °C THYS Thermal Hysteresis (Note 8) — — +20 — °C Note: 8. Compliance to the datasheet limits is assured by one or more methods: production test, characterization, and/or design. AP68255Q/AP68355Q 6 of 19 April 2025 Document number: DS47151 Rev. 1 - 2
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