Datasheet MP8765 (Monolithic Power Systems) - 3

MP8765 ─ 24V, HIGH CURRENT SYNCHRONOUS STEP-DOWN CONVERTER ELECTRICAL CHARACTERISTICS VIN = 12V, TJ = 25 C, unless otherwise noted. Parameters Symbol Condition Min Typ Max Units Supply Current
Supply Current (Shutdown) IIN VEN
=
0V 0 1 μA Supply Current (Quiescent) IIN VEN
=
2V, VFB = 0.65V 100 160 200 μA
MOSFET
High-side Switch On Resistance HSRDS-ON 38 mΩ Low-side Switch On Resistance LSRDS-ON 15 mΩ Switch Leakage SWLKG VEN = 0V, VSW = 0V 0 1 μA
Current Limit
Low-side Valley Current Limit ILIMIT TJ = 25C 6 6.6 7.6 A
Mode Pin
PWM Mode Threshold VMODE_H 2 V PFM Mode Threshold VMODE_L 0.4 V Pull-up Current IMODE_PU 2.5 μA
Switching frequency and minimum off timer
Switching frequency FS 400 500 600 kHz Minimum Off Time(6) TOFF 300 ns
Over-voltage Protection
OVP Threshold VOVP 125% 130% 135% VREF OVP Delay TOVPDEL 2 μs
Reference And Soft Start
Reference Voltage VREF 598 604 610 mV Feedback Current IFB VFB = 604mV 10 50 nA Soft Start Time TSS 6 7 8 ms
Enable And UVLO
Enable Input Low Voltage VILEN 1.15 1.25 1.35 V Enable Hysteresis VEN-HYS 100 mV VEN = 2V 3 Enable Input Current IEN μA VEN = 0V 0 VCC Under Voltage Lockout VCC Threshold Rising Vth 4.6 4.85 V VCC Under Voltage Lockout VCC Threshold Hysteresis HYS 480 mV MP8765 Rev. 1.1 www.MonolithicPower.com
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