MAX6469MAX6484 19-2532 Rev 6 2/11 300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit General Description Features 3 3 UCSP, 6-Pin SOT23, and 8-Pin TDFN The MAX6469MAX6484 are low-dropout linear regula- Packages tors with a fully integrated microprocessor reset circuit. Preset +1.5V to +3.3V Output (100mV Increments) Each is available with preset output voltages from +1.5V to +3.3V in 100mV increments and delivers up to 300mA SET Pin for Adjustable Output Voltage of load current. These devices consume only 82A of 75V LDO Output Voltage Noise RMS supply current. The low supply current, low dropout volt- (MAX6477MAX6484) age, and integrated reset functionality make these 2.0% Accuracy Over Temperature devices ideal for battery-powered portable equipment. Guaranteed 300mA Output Current The MAX6469MAX6484 include a reset output that indi- Low Dropout Voltage cates when the regulator output drops below standard 55mV at 150mA microprocessor supply tolerances (-7.5% or -12.5% of 114mV at 300mA nominal output voltage). This eliminates the need for an 82A Supply Current, 0.1A Shutdown Current external microprocessor supervisor, while ensuring that supply voltages and clock oscillators have stabilized Input Reverse Current, Thermal and Short-Circuit Protection before processor activity is enabled. Push-pull and open- drain active-low reset outputs are available, with reset Microprocessor Reset with Four Timeout Options timeout periods of 2.5ms, 20ms, 150ms, or 1200ms (min). Push-Pull or Open-Drain RESET The MAX6469/MAX6470/MAX6473MAX6478/MAX6481 Manual Reset Input MAX6484 also have a shutdown feature that reduces the Remote Feedback Sense supply current to 0.1A (typ). The MAX6471MAX6474/ Ordering Information MAX6479MAX6482 offer a manual reset input to assert a microprocessor reset while the regulator output is within PIN- specification. The MAX6475/MAX6476/MAX6483/ PART* TEMP RANGE PACKAGE MAX6484 feature a remote feedback sense pin for use MAX6469UT D -T -40C to +85C 6 SOT23-6 with an external NPN transistor for higher-current applica- tions. The MAX6469MAX6476 are available in 6-pin MAX6469TA D -T** -40C to +85C 8 TDFN-EP*** SOT23 and 8-pin TDFN packages. The MAX6477 MAX6470UT D -T -40C to +85C 6 SOT23-6 MAX6484 are available in a 3 3 chip-scale package MAX6470TA D -T** -40C to +85C 8 TDFN-EP*** (UCSP). All devices are specified for operation from Ordering Information continued at end of data sheet. -40C to +85C. *Devices are also available in a lead(Pb)-free/RoHS-compliant packages. Specify lead(Pb)-free by substituting a +T instead of Applications a -T when ordering. Handheld Instruments (PDAs, Palmtops) **Future productcontact factory for availability. ***EP = Exposed pad. PCMCIA Cards/USB Devices Cellular/Cordless Telephones Note: The first are placeholders for the output voltage lev- els of the devices. Desired output voltages are set by the suffix CD/DVD Drives found in the Output Voltage Suffix Guide (Table 1). The third Notebook Computers is a placeholder for the reset threshold accuracy. Desired reset threshold accuracy is set by the suffix found in the Reset Digital Cameras Threshold Accuracy Guide (Table 2). The following the D is Bluetooth Modules/Wireless LAN a placeholder for the reset timeout delay time. Desired reset timeout delay time is set by the suffix found in the Reset Timeout Delay Guide (Table 3). For example, the MAX6481BL30BD4-T has a 3.0V output voltage, 12.5% reset UCSP is a trademark of Maxim Integrated Products, Inc. threshold tolerance, and a 1200ms (min) reset timeout delay. Sample stock is generally available on standard versions only (Table 4). Standard versions require a minimum order incre- Pin Configurations appear at end of data sheet. ment of 2.5k units. Nonstandard versions must be ordered in 10k-unit increments. Contact factory for availability. Typical Operating Circuits appear at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) 6-Pin SOT23 (derate 9.1mW/C above +70C).............727mW IN, SHDN, OUT, FB ..................................................-0.3V to +7V 8-Pin TDFN (derate 24.4mW/C above +70C) ..........1951mW MR, SET .......................................................-0.3V to (V + 0.3V) Operating Temperature Range ..........................-40C to +85C IN RESET (push-pull) ...................................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C OUT RESET (open drain)..................................................-0.3V to +7V Storage Temperature Range .............................-65C to +150C OUT Short Circuit .......................................................Continuous Lead Temperature (soldering, 10s) .................................+300C Input/Output Current (all pins except IN and OUT)............20mA Soldering Temperature (reflow) Continuous Power Dissipation (T = +70C) Lead(Pb)-free packages...............................................+260C A 3 x 3 UCSP (derate 10.5mW/C above +70C) ............840mW Packages containing lead(Pb)......................................+240C Note 1: The MAX6477MAX6484 are constructed using a unique set of packaging techniques that impose a limit on the thermal pro- file the devices can be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles recommended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and Convection reflow. Pre-heating is required. Hand or wave soldering is not allowed. 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 + 0.5V) or +2.5V, whichever is greater, C = 3.3F, T = -40C to +85C. Typical specifications are at T = +25C, IN OUT OUT A A unless otherwise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage Range V 2.5 5.5 V IN Input Undervoltage Lockout V V falling 2.25 2.47 V UVLO IN I = 0A 82 136 OUT Supply Current (Ground Current) I A Q I = 300mA 96 OUT Shutdown Supply Current I T = +25C 0.1 1 A SHDN A REGULATOR CIRCUIT Output Current 300 mA 1mA I 150mA, T = +25C -1.3 +1.3 OUT A Output Voltage Accuracy (Fixed 1mA I 150mA, T = -40C to +85C -2.3 +2.3 Output Voltage Operation, OUT A % Table 1) MAX6469MAX6476 1mA I 300mA, T = -40C to +85C -2.7 +2.7 OUT A 2mA I 100mA, T = +25C -1.1 +1.1 OUT A Output Voltage Accuracy (Fixed 2mA I 100mA, T = -40C to +85C -2.0 +2.0 OUT A Output Voltage Operation, % 2mA I 300mA, T = -40C to +85C OUT A Table 1) MAX6477MAX6484 -2.5 +2.5 (Note 3) Adjustable Output Voltage Range V 5.0 V SET SET Reference Voltage V 1.200 1.229 1.258 V SET TM SET Dual Mode Threshold 185 mV SET Input Leakage Current I V = 0V, +1.2V (Note 3) 20 100 nA SET SET Dual Mode is a trademark of Maxim Integrated Products, Inc. 2 MAX6469MAX6484