MAX8530/MAX8531 19-2711 Rev 1 8/05 Dual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN General Description Features The MAX8530/MAX8531 offer the benefits of low- Guaranteed 200mA Output Current for OUT1 dropout voltage and ultra-low power regulation in Guaranteed 150mA Output Current for OUT2 subminiaturized UCSP and QFN packages with an inte- Low 100mV (typ) Dropout at 100mA Load for grated microprocessor reset circuit (MAX8530 only). both LDOs The devices operate from a 2.5V to 6.5V input and deliver up to 200mA and 150mA outputs with low Open-Drain, Active-Low 100ms (min) Reset Timer dropout of 100mV (typ) at 100mA. Designed with an (MAX8530) internal P-channel MOSFET pass transistor, the supply Low 40V Output Noise (MAX8531) RMS current is kept at a low 130A (with both LDOs on), Low 130A Operating Supply Current independent of the load current and dropout voltage. Other features include short-circuit protection and <1A Shutdown Current thermal-shutdown protection. Thermal-Overload and Short-Circuit Protection The MAX8530 provides microprocessor open-drain, Output Current Limit active-low reset output to monitor OUT1, eliminating Tiny Packages Available external components and adjustments. The MAX8530 1.16 x 1.57 x 0.6mm UCSP (3 x 2 Grid) asserts a 100ms (min) RESET signal when OUT1 drops 3mm x 3mm Thin QFN below 87% of the nominal output voltage. The MAX8531 includes a reference bypass pin for low output noise Ordering Information (40V ). RMS TEMP OUT PIN- Both devices include a logic-controlled shutdown input PART RANGE VOLTAGE PACKAGE and are available in 6-bump UCSP and 6-pin thin QFN exposed pad packages. MAX8530E BTxy*- T - 40 C to + 85 C 1.5V to 3.3V 6 UCSP M AX85 30E BTxy*+T - 40 C to + 85 C 1.5V to 3.3V 6 UCSP Applications M AX85 30E TTxy*-T - 40 C to + 85 C 1.5V to 3.3V 6 Thin Q FN-EP* * Cellular and Cordless Phones M AX 8530E TTxy*+T - 40 C to + 85 C 1.5V to 3.3V 6 Thin Q FN-EP* * PDAs and Palmtop Computers MAX8531E BTxy*- T - 40 C to + 85 C 1.5V to 3.3V 6 UCSP Notebook Computers M AX85 31E BTxy*+T - 40 C to + 85 C 1.5V to 3.3V 6 UCSP Digital Cameras M AX 8531E TTxy*-T - 40 C to + 85 C 1.5V to 3.3V 6 Thin Q FN-EP PCMCIA Cards M AX85 31E TTxy*+T - 40 C to + 85 C 1.5V to 3.3V 6 Thin Q FN-EP Wireless LAN Cards *xy = Output voltage code (see the Output Voltage Selector Guide). Hand-Held Instruments **EP = Exposed pad. +Denotes lead-free package. Pin Configurations appear at end of data sheet. Output Voltage Selector Guide appears at end of data sheet. Typical Operating Circuit INPUT 1.5V TO 3.3V 2.5V TO 6.5V AT 200mA IN OUT1 V I/O C IN 2.2F 2.2F BASEBAND P MAX8530 RESET RESET ON SHDN OUT2 V CORE OFF 1.5V TO 3.3V 1F GND AT 150mA 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 AVAILABLEDual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN ABSOLUTE MAXIMUM RATINGS Operating Temperature Range ...........................-40C to +85C IN, SHDN, RESET, BP to GND .................................-0.3V to +7V Junction Temperature......................................................+150C OUT1, OUT2 to GND...................................-0.3V to (V + 0.3V) IN Output Short-Circuit Duration ........................................Indefinite Storage Temperature Range .............................-65C to +150C 6-Bump+ UCSP Solder Profile ....................................(Note 1) Continuous Power Dissipation (T = +70C) A 6-Bump UCSP (derate 3.9mW/C above +70C) ........308mW 6-Lead QFN Lead Temperature (10s) .........................+300C 6-Lead QFN (derate 24.4mW/C above +70C) ........1951mW Note 1: For UCSP solder profile information, visit www.maxim-ic.com/1st pages/UCSP.html. 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 (IN = 3.8V, SHDN = IN, C = 10nF (MAX8531), T = -40C to +85C, unless otherwise noted. Typical values are at T = +25C.) BP A A (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage V 2.5 6.5 V IN Undervoltage Lockout Threshold V IN rising, hysteresis is 40mV (typ) 2.15 2.25 2.42 V UVLO T = +25C, I = I = 1mA -1 +1 A OUT1 OUT2 T = -40C to +85C, I = I = 1mA -2 +2 A OUT1 OUT2 Output Voltage Accuracy % T = - 40C to +85 C , I = 0.1mA to 200m A, A OUT 1 -3 +3 I = 0.1m A to 150m A OUT 2 OUT1 200 Maximum Output Current I mA OUT OUT2 150 OUT1 210 330 550 Current Limit I mA LIM OUT2 165 280 500 No load 130 220 Ground Current I A Q I = I = 100mA 150 OUT1 OUT2 Dropout Voltage V - V I = 100mA (Note 3) 100 200 mV OUT IN OUT Line Regulation V IN = (OUT + 0.1V) to 3.8V -0.2 +0.2 %/V LNR MAX8530 320 10Hz to 100kHz, C = 10F, OUT Output Voltage Noise V RMS I = 10mA OUT MAX8531 40 MAX8530 60 Ripple Rejection PSRR 100Hz, I = 30mA dB OUT MAX8531 62 SHUTDOWN SHDN = 0, T = +25C 0.01 1 A SHDN Supply Current I A OFF SHDN = 0, T = +85C 0.1 A V Input high voltage 1.6 IH SHDN Input Threshold V V Input low voltage 0.4 IL T = +25C 0.7 100 A SHDN Input Bias Current I SHDN = IN or GND nA SHDN T = +85C 0.8 A THERMAL PROTECTION Thermal-Shutdown Temperature T T rising 160 C SHDN J Thermal-Shutdown Hysteresis T 10 C SHDN 2 MAX8530/MAX8531