Click here to ask about the production status of specific part numbers. MAX1806 500mA, Low-Voltage Linear Regulator in MAX General Description Features The MAX1806 low-dropout linear regulator operates from Guaranteed 500mA Output Current a +2.25V to +5.5V supply and delivers a guaranteed Output Down to 0.8V 500mA load current with low 175mV dropout. The high- Low 175mV Dropout at 500mA accuracy (1%) output voltage is preset at an internally 1% Output Voltage Accuracy trimmed voltage (see Selector Guide) or can be adjusted from +0.8V to +4.5V with an external resistive-divider. Preset at 0.8V, 1.5V, 1.8V, 2.5V, or 3.3V Adjustable from 0.8V to 4.5V An internal PMOS pass transistor allows low 210A supply current, making this device ideal for portable Power-OK Output equipment such as personal digital assistants (PDAs), Low 210A Ground Current cellular phones, cordless phones, and other equipment, 0.02A Shutdown Current including base stations and docking stations. Thermal Overload Protection Other features include an active-low, power-OK output that indicates when the output is out of regulation, a Output Current Limit 0.02A shutdown mode, short-circuit protection, and Tiny 1.3W, 8-Pin Power-MAX Package thermal shutdown protection. The MAX1806 comes in a -40C to +85C Temperature Range miniature 1.3W, 8-pin power-MAX package with a metal pad on the underside of the package. Ordering Information Applications PART AND SUFFIX V (V) TOP MARK OUT Notebook Computers MAX1806EUA08+ 0.8 AAAK Cellular and Cordless Telephones PDAs MAX1806EUA15+ 1.5 AAAJ Palmtop Computers MAX1806EUA18+ 1.8 AAAI Base Stations MAX1806EUA25+ 2.5 AAAH USB Hubs Docking Stations MAX1806EUA33+ 3.3 AAAG +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. Typical Operating Circuit Pin Configuration V V OUT IN +2.25V TO +5.5V 0.8V TO 4.5V TOP VIEW IN OUT C + C IN OUT 1F 10F 1 8 OUT IN MAX1806 IN 2 7 OUT R MAX1806 POK 100k POK 3 6 SET ON TO SHDN POK C SHDN 4 5 GND OFF MAX SET GND 19-2018 Rev 1 8/21MAX1806 500mA, Low-Voltage Linear Regulator in MAX Absolute Maximum Ratings IN, SHDN, POK, SET to GND .................................-0.3V to +6V Operating Temperature ...................................... -40C to +85C OUT to GND ...............................................-0.3V to (V + 0.3V) Junction Temperature ......................................................+150C IN Output Short-Circuit Duration ....................................Continuous Storage Temperature Range ............................ -65C to +150C Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) ................................+300C A 8-Pin Power-MAX (derate 17mW/C above +70C) ......1.3W 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 = V + 500mV or V = +2.25V whichever is greater, SET = GND, SHDN = IN, T = 0C to +85C, unless otherwise IN OUT(SETPOINT) IN A noted. Typical values are at T = +25C.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage V 2.25 5.5 V IN Input Undervoltage Lockout V Rising, 40mV hysteresis 1.85 2.0 2.15 V UVLO T = +85C, I = 100mA -1 +1 A OUT Output Voltage Accuracy T = +85C, I = 1mA to 500mA -1.5 +1.5 A OUT V % OUT (Preset Mode) T = 0C to +85C, I = 1mA to 500mA, A OUT -3 +3 V > V + 0.5V IN OUT Adjustable Output Voltage 0.8 4.5 V T = +85C, I = 100mA 790 810 A OUT SET Voltage Threshold T = +85C, I = 1mA to 500mA 786 814 A OUT V mV SET (Adjustable Mode) T = 0C to +85C, I = 1mA to 500mA, A OUT 774 800 826 V > V + 0.5V IN OUT Maximum Output Current I 500 mA OUT RMS Short-Circuit Current Limit I V = 0V 700 1400 2300 mA LIM OUT SET Dual Mode Threshold 35 80 125 mV SET Input Bias Current I V = +0.8V -100 +100 nA SET SET I = 1mA 210 400 OUT Ground-Pin Current I A Q I = 500mA 575 OUT V = +2.25V 259 384 OUT Dropout Voltage (Note 1) I = 500mA V = +2.8V 201 315 mV OUT OUT V = +4.0V 147 255 OUT Line Regulation V V from (V + 100mV) to 5.5V, I = 5mA 0 0.125 %/V LNR IN OUT LOAD Load Regulation V I = 1mA to 500mA 15.5 35 ppm/mA LDR OUT Output Voltage Noise 10Hz to 1MHz, C = 10F (ESR < 0.1) 300 V OUT RMS SHUTDOWN Shutdown Supply Current I SHDN = GND, V 5.5V 0.02 5 A OFF IN = V 1.6 IH SHDN Input Threshold V V 0.6 IL SHDN Input Bias Current I SHDN = GND or IN 10 100 nA SHDN Startup Time T C = 10F, time from SHDN high to POK high 40 s START OUT Dual Mode is a trademark of Maxim Integrated Products, Inc. Maxim Integrated 2 www.maximintegrated.com