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ISL61863BCRZ Datasheet(PDF) 7 Page - Intersil Corporation |
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ISL61863BCRZ Datasheet(HTML) 7 Page - Intersil Corporation |
7 / 18 page ISL6186 7 FN7698.1 September 1, 2011 Introduction The ISL6186 is a single channel overcurrent (OC) fault protection IC for the +2.5V to +5V environment. Each ISL6186 has a 45m Ω P-channel MOSFET power switch for power control. An enabling input and fault reporting output compatible with 2.5V to 5V logic allows for external control and reporting. This device features an integrated power switch with current monitoring, accurate current limiting, reverse bias protection, and current limited timed delay to turn-off for system reliability. See Figures 11 through 27 for typical operational waveforms including both undercurrent and overcurrent situations. The ISL6186 offers current sense and limiting with VIN =5V to guarantee continuous current levels of 1.5A, 3A and 3.6A, making these devices well suited for a myriad of USB and other low-power (18W max) port power management applications and configurations. The ISL6186 also provides thermally insensitive timed OC turn-off and fault notification, isolating and protecting the voltage bus in the event of a peripheral OC or short circuit independent of the ambient thermal condition. The ISL6186 undervoltage lockout feature prevents turn-on of the output unless the correct ENABLE state and VIN > VUVLO are present. During initial turn-on, the ISL6186 prevents false fault reporting by blanking the fault signal. During operation, once an OC condition is detected, the output is current limited for tCL to allow transient OC conditions to pass. If still in current limit after the current limit period has elapsed, the output is then turned off and the fault is reported by pulling the FAULT output low. On the latch-off options, after turn-off, both the output and the FAULT signal are latched low until reset by the enable signal being de-asserted or a POR occurring. At this time, the FAULT signal will clear and the switch is ready to be turned back on. On the auto restart options, the ISL6186 will attempt to periodically turn on the output as long as the enable is asserted. When disabled, the ISL6186 has a low quiescent supply current and output to input reverse current flow blocking capability. The ISL6186 family is provided with enable polarity options and an industry standard 8 Ld SOIC pinout along with two versions in the 70% smaller 3x3 DFN. The 8 Ld DFN package offers the same performance as the 8 Ld SOIC whereas the 10 Ld DFN offers higher current capability in the smallest possible package due to its lower package electrical and thermal resistance. Additionally, the 10 Ld DFN has a Power-Good output PGD that pulls low 40ms after VOUT>90% of VIN and rises after VOUT<85% of VIN. Ren_h ENABLE Pull-Down Resistor Enable asserted high options 0.6 1 1.55 M Ω Ren_l ENABLE Pull-Up Resistor Enable asserted low options 0.6 1 1.55 M Ω tON Enable to Output Turn-on Time RL = 10Ω, CL = 10µF, Enable 50% to Output 90% - 0.1 - ms tOFF Enable to Output Turn-off Time RL = 10Ω, CL = 10µF, Enable 50% to Output 10% - 0.25 - ms tpdPGr Enable to Power Good Output Rising Time Disable to Power-Good De-assert - 30 - ns PG Vth Power Good Threshold PGD pulls low when VOUT/VIN 88 91 95 % PGN Vth Power Not Good Threshold PGD release high when VOUT/VIN 78 86 93 % tVthr2PG PG Vth to PG Falling PG delay after PG Vth - 1.5 - µs tVthf2PG PGN Vth to PG Rising PG delay after PGN Vth - 45 - µs BIAS PARAMETERS IVDD Enabled VIN Current Switches Closed, OUTPUT = OPEN - 57 75 µA IVDD Disabled VIN Current Switches Open, OUTPUT = OPEN - 3.5 5.5 µA VUVLO Rising POR Threshold VIN Rising to functional operation - 2.1 2.3 V IVR Reverse Blocking Leakage Current VIN = 0V, VOUT = 5V - 0.3 2.0 µA Temp_dis Over-Temperature Disable - 150 - °C Temp_hys Over-Temperature Hysteresis - 20 - °C NOTE: 8. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design. Electrical Specifications VIN = 5V, TA = TJ, Unless Otherwise Specified. Boldface limits apply over the operating temperature range, 0°C to +75°C or -40°C to +85°C. (Continued) SYMBOL PARAMETER TEST CONDITIONS MIN (Note 8) TYP MAX (Note 8) UNITS |
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