MAX869L 19-1278 Rev 0 8/97 2A, Current-Limited, High-Side P-Channel Switch with Thermal Shutdown General Description Features The MAX869L P-channel load switch features an accu- Very Small Footprint (16-pin QSOP is the same rate user-set current limit and low on-resistance. This size as an 8-pin SO) switch is designed to protect your power source from Low Resistance: 45m at 3V shorts and surges by limiting current and preventing the system supply from being pulled low. The input volt- 21%-Accurate, User-Set Current Limit age range is 2.7V to 5.5V. 12A (typ) Quiescent Current The MAX869L features a 2A, 45m switch controlled by a logic signal. Current-limit accuracy is 21%, and 0.01A (typ) Shutdown Current can be set from 400mA to 2.4A using a single resistor. 0.04A (typ) Leakage to Output when Switch The device has a low 12A quiescent supply current, is Off which reduces to 2A max in shutdown. It features ther- 2.7V to 5.5V Input Range mal-shutdown protection and a logic-signal output pin (FAULT) that signals when there is an overcurrent or Thermal Shutdown overtemperature condition. FAULT Output For other devices in this family, consult the Selector Guide. Ordering Information Selector Guide PART TEMP. RANGE PIN-PACKAGE R NOMINAL ON MAX869LC/D 0C to +70C Dice* PART AT 3V CURRENT COUNT PACKAGE (m) (A) MAX869LEEE -40C to +85C 16 QSOP *Dice are specified at T = +25C. A MAX869L 45 2 Single 16 QSOP MAX890L 90 1 Single 8 SO MAX891L 150 0.5 Single 8 MAX MAX892L 300 0.25 Single 8 MAX Typical Operating Circuit MAX894L 150 0.5 Dual 8 SO MAX895L 300 0.25 Dual 8 SO INPUT OUTPUT Applications IN OUT 2.7V TO 5.5V UP TO 2A Universal Serial Bus (USB) 0.1F* 1F* MAX869L 100k Notebook Computers Personal Communicators ON/OFF FAULT ON Palmtop Computers Hand-Held Instruments GND SET Portable Medical Instruments R SET *FOR USB APPLICATIONS, C = 1F, C = 120F Pin Configuration appears at end of data sheet. IN OUT Maxim Integrated Products 1 For free samples & the latest literature: 2A, Current-Limited, High-Side P-Channel Switch with Thermal Shutdown ABSOLUTE MAXIMUM RATINGS IN to GND ..................................................................-0.3V to 6V Operating Temperature Range ON, FAULT to GND ....................................................-0.3V to 6V MAX869LEEE.....................................................-40C to +85C SET, OUT to GND ...................................... -0.3V to (V + 0.3V) Storage Temperature Range ........................... -65C to +150C IN Maximum Continuous Switch Current .....................................3A Lead Temperature (soldering, 10sec) .............................+300C Continuous Power Dissipation (T = +70C) A QSOP (derate 8.3mW/C above +70C) .......................667mW Stresses beyond those listed under 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 for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = 3V, T = 0C to +85C, unless otherwise noted. Typical values are at T = +25C.) IN A A PARAMETER CONDITIONS MIN TYP MAX UNITS Operating Voltage 2.7 5.5 V Quiescent Current V = 5V, ON = GND, I = 0A 12 20 A IN OUT Off-Supply Current ON = IN, V = V = 5.5V 0.01 2 A IN OUT Off-Switch Current ON = IN, V = 5.5V, V = 0V 0.04 30 A IN OUT Undervoltage Lockout Rising edge, 1% hysteresis 2.0 2.3 2.6 V V = 4.75V 38 70 IN On-Resistance m V = 3.0V 45 90 IN Nominal Current-Limit Set Range R = 1% tolerance (Note 1) 0.40 2.4 A SET Current-Limit-Amplifier Threshold V required to turn the switch off (Note 2) 1.178 1.240 1.302 V SET I to I Current Ratio I = 1A, V > 1.6V 810 955 1100 A/A OUT SET OUT OUT ON Input Low Voltage V = 2.7V to 5.5V 0.8 V IN V = 2.7V to 3.6V 2.0 IN V ON Input High Voltage V = 4.5V to 5.5V 2.4 IN V = 5.5V 0.01 1 A ON Input Leakage ON I Bias Current V = 1.24V, I = 0A 0.05 3 A SET SET OUT I = 1mA, V = 1.4V 0.4 V FAULT Logic Output Low Voltage SINK SET FAULT Logic Output High Leakage Current V = 5.5V, V = 1V 0.05 1 A FAULT SET Slow-Current-Loop Response Time 20% current overdrive, V = 5V 10 s CC Fast-Current-Loop Response Time 4 s V = 5V, I = 500mA 100 300 IN OUT Turn-On Time s V = 3V, I = 500mA 200 IN OUT Turn-Off Time V = 5V, I = 500mA 2 10 30 s IN OUT Note 1: Guaranteed by design. Derived from the I current ratio current-limit amplifier and external set resistor accuracies. SET Note 2: Tested with I = 200mA and V raised until (V - V ) 0.8V. OUT SET IN OUT Note 3: Specifications to -40C are guaranteed by design, not production tested. 2 MAX869L