MAX15029/MAX15030 1.425V to 3.6V Input, 500mA Low-Dropout Regulators with BIAS Input General Description Features The MAX15029/MAX15030 low-dropout linear regulators 1.425V to 3.6V Input Voltage Range operate from input voltages as low as 1.425V and deliver Output Voltage Programmable from 0.5V to V IN up to 500mA of continuous output current with a typical Guaranteed Maximum 150mV Dropout for Standard dropout voltage of only 40mV. The output voltage is adjust- Package and 190mV Dropout for Side-Wettable able from 0.5V to V and is 2% accurate over load and IN Package at 500mA Output Current line variations, from -40C to +125C. The MAX15030 features a BIAS input of 3V to 5.5V from an always-on 2% Output Accuracy Over Load, Line, and Temperature power supply. The BIAS input current is reduced down to less than 2A during the shutdown. Stable with Ceramic Capacitors These regulators use small, 1F ceramic input capacitors Fast Transient Response and 2.2F ceramic output capacitors to deliver 500mA 60A Operating Bias Supply Current output current. High bandwidth provides excellent tran- 1.2A Shutdown Bias Supply Current sient response and limits the output voltage deviation to 10mV for a 100mA to 500mA load step, with only a 2.2F Short-Circuit and Thermal Protection ceramic output capacitor, and the voltage deviations can -40C to +125C Operating Temperature Range be reduced further by increasing the output capacitor. Soft-Start Limits Inrush Current These devices offer a logic-controlled shutdown input to Thermally Enhanced 3mm x 3mm TDFN Package reduce input current (I ) consumption down to less than IN 5.5A in standby mode. Other features include a soft- Applications start to reduce inrush current, short-circuit protection, and thermal-overload protection. Automotive (Dead-Man LDO) Servers The MAX15030 features a BIAS input allowing a Storage secondary supply to keep the LDOs internal circuitry Networking alive if the voltage on IN goes to 0. Both devices are fully Base Stations specified from -40C to +125C and are available in a Optical Modules 10-pin thermally enhanced TDFN package (3mm x 3mm) ATE that includes an exposed pad for optimal power dissipation. For a 1A version of these LDOs, refer to the MAX15027/ Ordering Information appears at end of data sheet. MAX15028 data sheet. Typical Operating Circuits OUTPUT OUTPUT 0.5V TO V ALWAYS-ON INPUT 0.5V TO V IN IN BIAS OUT OUT 3V TO 5.5V INPUT INPUT IN IN 1.425V TO 3.6V 1.425V TO 3.6V 1F 1F MAX15029 MAX15030 FB FB 2.2F 2.2F EN EN GND GND SS SS 19-4586 Rev 5 9/16MAX15029/MAX15030 1.425V to 3.6V Input, 500mA Low-Dropout Regulators with BIAS Input Absolute Maximum Ratings IN, FB, SS, I.C. to GND .......................................-0.3V to +4.0V Operating Junction Temperature Range .......... -40C to +125C BIAS to GND ...........................................................-0.3V to +6V Maximum Junction Temperature .....................................+150C EN to GND .............-0.3V to the lower of (V + 0.3V) or +6V Storage Temperature Range ............................ -65C to +150C BIAS OUT to GND ...............................................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C IN Output Short-Circuit Duration ....................................Continuous Soldering Temperature (reflow) .......................................+260C Continuous Power Dissipation (T = +70C) A TDFN (derate 24.4mW/C above +70C) ..................1951mW 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 Thermal Characteristics (Note 1) TDFN Side-Wettable TDFN Junction-to-Ambient Thermal Resistance ( ) ..........41C/W Junction-to-Ambient Thermal Resistance ( ) ..........41C/W JA JA Junction-to-Case Thermal Resistance ( ) .................9C/W Junction-to-Case Thermal Resistance ( ) .................8C/W JC JC Note 1: 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 (Circuit of Figure 1 V = 1.8V, V = 1.2V, EN = IN for MAX15029, EN = BIAS for MAX15030, I = 100mA, T = T = -40C to IN OUT OUT A J +125C. Typical values are at T = +25C, unless otherwise noted.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS IN MAX15029 1.425 3.600 Input Voltage Range V V = 3V to 5.5V 1.425 3.600 V IN BIAS MAX15030 BIAS = IN 3.000 3.600 MAX15029 1.275 1.325 1.375 Undervoltage Lockout V V rising V UVLO IN MAX15030 1.04 1.09 1.14 Undervoltage Lockout V UVLO I = 2mA 50 mV OUT Hysteresis HYST V = 1.425V to 3.6V, V = 1.2V, IN OUT 160 275 410 I = 1mA, V = 3.3V OUT BIAS Quiescent GND Current I A GND V = 3.6V, V = 3.3V, I = 100mA 180 325 560 IN OUT OUT V = 3.3V, V = 3.3V, I = 500mA 170 315 470 IN OUT OUT Input Supply Current in I V = 0V (T = -40C to +85C) 0.1 5.5 A IN SD EN A Shutdown BIAS (MAX15030) Input Voltage Range V 3 5.5 V BIAS V BIAS Undervoltage Lockout V rising 2.3 2.5 2.7 V BIAS UVLO Undervoltage Lockout Hysteresis I = 2mA 110 mV OUT Quiescent Input Supply Current I V = V 20 60 120 A BIAS EN BIAS V = 0V, V = 0V, IN OUT 1.2 2 V = 3.3V BIAS Input Supply Current in V = 3.3V, V = 0V, IN OUT I EN = GND 1.2 2 A BIAS SD Shutdown V = 3.3V BIAS V = 3.3V, V = 0V, IN OUT 1.5 3 V = 5V BIAS Maxim Integrated 2 www.maximintegrated.com