Click here to ask about the production status of specific part numbers. MAX1935 500mA, Low-Voltage Linear Regulator in Tiny DFN General Description Features The MAX1935 low-dropout linear regulator operates from Guaranteed 500mA Output Current a 2.25V to 5.5V supply and delivers a guaranteed 500mA Output Down to 0.8V load current with low 175mV dropout. The high-accuracy Low 175mV Dropout at 500mA (1.5%) output voltage is preset at an internally trimmed 1.5% Output Voltage Accuracy voltage or can be adjusted from 0.8V to 4.5V with an Preset at 1.5V external resistive-divider. Adjustable from 0.8V to 4.5V An internal PMOS pass transistor allows low 210A Power-OK Output supply current, making this device ideal for portable Low 210A Ground Current equipment such as personal digital assistants (PDAs), 0.02A Shutdown Current cellular phones, cordless phones, and other equipment, Thermal-Overload Protection including base stations and docking stations. Output Current Limit Other features include an active-low, power-OK output Tiny 1.9W, 8-Pin 3mm x 3mm Thin DFN Package that indicates when the output is out of regulation, a 0.02A shutdown mode, short-circuit protection, and Ordering Information thermal-shutdown protection. The MAX1935 comes in a tiny 1.9W, 8-pin 3mm x 3mm thin DFN package. PART TEMP RANGE PIN-PACKAGE 8 Thin DFN Applications MAX1935ETA* -40C to +85C 3mm x 3mm Notebook Computers Cellular and Cordless Telephones 8 Thin DFN MAX1935ETA15* -40C to +85C 3mm x 3mm PDAs Palmtop Computers *Contact factory for preset output voltages. Base Stations USB Hubs Selector Guide Docking Stations PART OUTPUT VOLTAGE TOP MARK MAX1935ETA Adjustable ADB MAX1935ETA15 1.5V ADB Typical Operating Circuit Pin Configuration R POK V TOP VIEW 100k OUT 0.8V TO 4.5V POK OUT C OUT TO C IN 1 8 OUT 10F R 1 IN 2 7 OUT MAX1935 MAX1935 V IN POK 3 6 SET 2.25V TO 5.5V IN SET SHDN 4 5 GND C IN 1F R 2 THIN DFN ON 3mm x 3mm SHDN GND OFF 19-2599 Rev 1 7/20MAX1935 500mA, Low-Voltage Linear Regulator in Tiny DFN 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 Thin DFN (derate 24.4mW/C above +70C) ......1.95W 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. Package Information TDFN PACKAGE CODE T833+2C Outline Number 21-0137 Land Pattern Number 90-0059 Thermal Resistance, Four-Layer Board: Junction to Ambient ( ) 41C/W JA Junction to Case ( ) 8C/W JC For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a +, , or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. 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 5.50 V IN Input Undervoltage Lockout V Rising, 40mV hysteresis 1.85 2 2.15 V UVLO T = +25C, I = 100mA -1.5 +1.5 A OUT Output Voltage Accuracy T = +25C, I = 1mA to 500mA -2.5 +2.5 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 Range 0.8 4.5 V T = +25C, I = 100mA 788 812 A OUT SET Voltage Threshold T = +25C, I = 1mA to 500mA 780 820 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 Short-Circuit Current Limit I V = 0V 600 1400 2300 mA LIM OUT Maxim Integrated 2 www.maximintegrated.com