MAX1819 19-2072 Rev 0 1/02 500mA Low-Dropout Linear Regulator in UCSP General Description Features The MAX1819 low-dropout linear regulator operates from Guaranteed 500mA Output Current a 2.5V to 5.5V supply and delivers a guaranteed 500mA Low 90mV Dropout at 500mA load current with low 120mV dropout. The high-accuracy 1% Initial Output Accuracy (1%) output voltage is preset at an internally trimmed voltage (see the Selector Guide) or can be adjusted from Preset Output at 1.5V, 1.8V, 2V, 2.5V, 3.3V, 5V 1.25V to 5V with an external resistive-divider. Adjustable Output from 1.25V to 5V An internal PMOS pass transistor allows the low 125A Power-OK Output supply current to remain independent of load, making this device ideal for portable battery-operated equip- Low 125A Ground Current ment such as personal digital assistants (PDAs), cellu- 0.1A Shutdown Current lar phones, cordless phones, base stations, and notebook computers. Thermal Overload Protection Other features include an active-low, open-drain reset Output Current Limit output that indicates when the output is out of regula- Tiny 840mW 6-Pin UCSP Package tion, a 0.1A shutdown, short-circuit protection, and thermal shutdown protection. The device is available in Ordering Information a miniature 6-pin UCSP package. PART TEMP RANGE PIN-PACKAGE Applications MAX1819EBL -T* -40C to +85C 6 UCSP Notebook Computers *Insert the desired two-digit suffix (see Selector Guide) into the Cellular and Cordless Telephones blanks to complete the part number. Personal Digital Assistants (PDAs) Palmtop Computers Selector Guide Base Stations PART AND USB Hubs V UCSP MARK OUT SUFFIX Docking Stations MAX1819EBL 15 1.5V or Adj AAH MAX1819EBL 18 1.8V or Adj AAG MAX1819EBL 20 2V or Adj AAC UCSP is a trademark of Maxim Integrated Products, Inc. MAX1819EBL 25 2.5V or Adj AAD MAX1819EBL 33 3.3V or Adj AAE MAX1819EBL 50 5V or Adj AAF Pin Configuration Typical Operating Circuit TOP VIEW V = 2.5V TO 5.5V IN (TOP OF PC BOARD/ 2 3 1 V IN OUT OUT BALLS SOLDERED DOWN) NC IN POK SHDN C C OUT IN A A1 A2 A3 1F 3.3F MAX1819 R POK B 100k MAX1819 ON TO SHDN POK C OUT OFF SET GND C C1 C2 C3 SET GND UCSP 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-Dr500mA Low-Dropout Linear Regulator in UCSP opout Linear Regulator in ABSOLUTE MAXIMUM RATINGS Operating Temperature Range ...........................-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 ...............................................1min Soldering Temperature (10s)...........................................+300C Continuous Power Dissipation (T = +70C) (Note 1) A 6-Pin UCSP (derate 10.5mW/C above +70C) ............840mW Note 1: Thermal properties are specified with product mounted on PC board with one square-inch of copper area and still air. 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 = 2.5V, whichever is greater SHDN = IN, T = -40C to +85C, unless otherwise noted. Typical values IN OUT IN A are at T = +25C.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage V 2.5 5.5 V IN Input Undervoltage Lockout V Rising, 75mV hysteresis 2.0 2.15 2.3 V UVLO I = 100mA, T = +25C, V 2V -1 +1 OUT A OUT I = 100mA, T = +25C, V < 2V -1.5 +1.5 OUT A OUT Output Voltage Accuracy V I = 100mA, T = -40C to +85C -2.5 +2.5 % OUT OUT A (Preset Mode) I = 1mA to 500mA, V > V + 0.5V, OUT IN OUT -3 +3 T = -40C to +85C A Adjustable Output 1.25 5.00 V Voltage Range V = 2.7V, IN T = 0C to +85C 1.225 1.250 1.275 A SET Voltage Threshold V I = 100mA, V SET OUT (Adjustable Mode) T = -40C to +85C 1.213 1.288 A V set to 2V OUT Guaranteed Output Current I V 2.7V 500 mA OUT IN (RMS) Short-Circuit Current Limit I V = 0, V 2.7V 0.55 1.39 2.50 A LIM OUT IN In-Regulation Current Limit V > 96% of nominal value, V 2.7V 2 A OUT IN SET Dual Mode Threshold 50 100 150 mV SET Input Bias Current I V = 1.25V -100 +100 nA SET SET I = 100A 125 250 OUT Ground-Pin Current I A Q I = 500mA 150 OUT V = 5V 125 220 OUT Dropout Voltage (Note 3) V - V I = 500mA V = 3.3V 133 232 mV IN OUT OUT OUT V = 2.5V 165 280 OUT V from (V + 100mV) to 5.5V, IN OUT Line Regulation V -0.15 0 +0.15 %/V LNR I = 5mA LOAD Dual Mode is a trademark of Maxim Integrated Products, Inc. 2 MAX1819