MAX8569AEUT+T Analog Devices

MAX8569A/MAX8569B 19-3671 Rev 0 5/05 200mA Step-Up Converters in 6-Pin SOT23 and TDFN General Description Features The MAX8569A/MAX8569B low-quiescent-current Over 200mA Available Output Current boost regulators provide up to 200mA at output volt- 1.5V to 5.5V Input Voltage Range ages up to 5.5V from a 1.5V to 5.5V input source. The BATT Connected to OUT in Shutdown for Backup built-in synchronous rectifier allows for over 90% effi- Power ciency while achieving small size and low cost by elimi- nating the need for an external Schottky diode. Up to 95% Efficiency The MAX8569A provides an adjustable output while the 7A Typical Quiescent Current MAX8569B is fixed at 3.0V or 3.3V. The MAX8569B fea- <1A Shutdown Supply Current tures a power-on reset output (RST) to signal that the output has reached regulation. All devices connect the Internal Synchronous Rectifier battery input to the output during shutdown, allowing 750mA Switch Current Limit the input battery to be used as a backup or real-time clock supply when the converter is off. RST Output (MAX8569B) Adjustable Output Voltage (MAX8569A) Applications Fixed 3.0V or 3.3V Output Voltage (MAX8569B) Medical Diagnostic Cordless Phones Equipment Ordering Information Battery Backup Digital Cameras PART TEMP RANGE PIN-PACKAGE PC Cards PDAs and Smartphones 6 SOT23-6 Local 3.3V or 5V Supply MAX8569AEUT-T* -40C to +85C (U6FH-6) Typical Operating Circuit 6 TDFN 3mm x 3mm MAX8569AETT+ -40C to +85C (T633-1) 3.3V, 200mA BATT OUT 6 SOT23-6 OUTPUT MAX8569BEUT-T* -40C to +85C (U6FH-6) MAX8569B 2V LX 6 TDFN 3mm x 3mm INPUT POWER-ON MAX8569BETT+ -40C to +85C RST RESET (T633-1) ON OFF SHDN GND 6 TDFN 3mm x 3mm MAX8569BETT30+ -40C to +85C (T633-1) *Future productcontact factory for availability. Selector Guide appears at end of data sheet. +Denotes lead-free packaging. Pin Configurations TOP VIEW TOP VIEW 6 5 4 SHDN16 FB (RST) MAX8569A BATT 2 5 OUT (MAX8569B) MAX8569A (MAX8569B) GND34 LX SOT23 + 12 3 ( ) ARE FOR THE MAX8569B TDFN + DENOTES LEAD-FREE PACKAGING 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. EVALUATION KIT AVAILABLE SHDN FB (RST) BATT OUT GND LX200mA Step-Up Converters in 6-Pin SOT23 and TDFN ABSOLUTE MAXIMUM RATINGS Operating Temperature Range ...........................-40C to +85C BATT, LX, OUT, FB, RST to GND .............................-0.3V to +6V Junction Temperature......................................................+150C SHDN to GND...........................................-0.3V to (V + 0.3V) OUT LX Current....................................................................1.5A Peak Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Continuous Power Dissipation (T = +70C) A 6-Pin SOT23 (derate 9.1mW/C above +70C)............727mW 6-Pin TDFN 3mm x 3mm (derate 18.2mW/C above +70C).............................1454mW 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 = 3.3V, V = 2.0V, T = -40C to +85C. Typical values are at T = +25C, unless otherwise noted.) (Note 1) SHDN OUT BATT A A PARAMETER CONDITIONS MIN TYP MAX UNITS Battery Input Range 1.5 5.5 V T = +25C 1.22 1.5 A Startup Voltage R = 2.6k V LOAD T = -40C to +85C 1.24 A MAX8569A 2.0 5.5 T = +25C 2.94 3.0 3.06 A MAX8569BETT30 Output Voltage T = -40C to +85C 2.925 3.075 V A T = +25C 3.233 3.300 3.366 A MAX8569B T = -40C to +85C 3.217 3.373 A T = +25C 1.208 1.228 1.248 A Feedback Threshold MAX8569A V T = -40C to +85C 1.203 1.253 A T = +25C 3.5 20 A Feedback Bias Current MAX8569A, V = 1.27V nA FB T = -40C to +85C4 A n-Channel On-Resistance I = 100mA 0.3 0.7 LX p-Channel On-Resistance I = 100mA 0.3 0.9 LX T = +25C 650 750 920 A n-Channel Switch Current Limit mA T = -40C to +85C 600 975 A Switch Maximum On-Time V = 2.8V 3.5 5 6.5 s OUT T = +25C 3 25 50 A Synchronous Rectifier Zero- mA Crossing Current T = -40C to +85C060 A OUT Quiescent Current V = 3.5V, V = 1.3V (Note 2) 4 10 A OUT FB OUT Shutdown Current V = 3.5V, V = V = 0V 0.05 1A OUT SHDN FB BATT Quiescent Current V = 3.5V, V = 1.3V (Note 3) 3 10 A OUT FB BATT Shutdown Current V = 3.5V, V = 0V 0.01 1A OUT SHDN SHDN Logic-Low 0.3 V 2 MAX8569A/MAX8569B