MAX1806 19-2018 Rev 0 4/01 500mA, Low-Voltage Linear Regulator in MAX General Description Features The MAX1806 low-dropout linear regulator operates Guaranteed 500mA Output Current from a +2.25V to +5.5V supply and delivers a guaran- Output Down to 0.8V teed 500mA load current with low 175mV dropout. The high-accuracy (1%) output voltage is preset at an Low 175mV Dropout at 500mA internally trimmed voltage (see Selector Guide) or can 1% Output Voltage Accuracy be adjusted from +0.8V to +4.5V with an external resis- tive-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 equip- ment, including base stations and docking stations. 0.02A Shutdown Current Other features include an active-low, power-OK output Thermal Overload Protection that indicates when the output is out of regulation, a 0.02A shutdown mode, short-circuit protection, and Output Current Limit thermal shutdown protection. The MAX1806 comes in a Tiny 1.3W, 8-Pin Power-MAX Package miniature 1.3W, 8-pin power-MAX package with a metal pad on the underside of the package. Ordering Information PART TEM P. RA N G E PIN-PACKAGE Applications MAX1806EUA -40C to +85C 8 Power- MAX Notebook Computers Cellular and Cordless Telephones Selector Guide PDAs PART AND SUFFIX V (V) TOP MARK OUT Palmtop Computers MAX1806EUA33 3.3 AAAG Base Stations MAX1806EUA25 2.5 AAAH USB Hubs MAX1806EUA18 1.8 AAAI Docking Stations MAX1806EUA15 1.5 AAAJ MAX1806EUA08 0.8 AAAK Typical Operating Circuit Pin Configuration V V IN OUT TOP VIEW +2.25V TO +5.5V 0.8V TO 4.5V IN OUT NC C IN C OUT 1 F 10 F IN 1 8 OUT R POK IN 2 7 OUT MAX1806 100k MAX1806 ON POK 3 6 SET TO SHDN POK C OFF SHDN 4 5 GND SET GND MAX Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.500mA, Low-Voltage Linear Regulator in MAX ABSOLUTE MAXIMUM RATINGS Operating Temperature .......................................-40C to +85C IN, SHDN, POK, SET to GND ...................................-0.3V to +6V OUT to GND ................................................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C IN Storage Temperature Range .............................-65C to +150C Output Short-Circuit Duration.....................................Continuous Lead Temperature (soldering, 10s) .................................+300C Continuous Power Dissipation (T = +70C) 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 T = +85C, I = 1mA to 500mA -1.5 +1.5 Output Voltage Accuracy 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 T = +85C, I = 1mA to 500mA 786 814 SET Voltage Threshold 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 m A 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 fr om ( V + 100mV ) to 5.5V , I = 5mA 0 0.125 %/V LNR I N OUT L OA D Load Regulation V I = 1mA to 500mA 15.5 35 p p m /m A 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, tim e from SHDN high t o POK high4 0 s START OUT Dual Mode is a trademark of Maxim Integrated Products, Inc. 2 MAX1806