XR71211 1.5A Ultra Low Dropout Voltage Regulator FEATURES General Description 1.5A Output Current 1.4V to 2.625V Single Input Voltage The XR71211 is an ultra low dropout voltage regulator capable of deliver- Adjustable Output Voltage 0.6V ing an output of 1.5Amps. It differentiates from its competitors by being able to operate from a single supply rail of 1.4V to 2.625V without the need 0.5% Output Voltage Accuracy for a noise generating charge pump or secondary bias rail. Ultra Low Dropout Voltage 250mV Max over temp 1.5A This LDO provides a guaranteed dropout voltage of 250mV at maximum Power Good Flag junction temperature and is ideal for 1.5V to 1.2V and 1.8V to 1.5V conver- Enable and Soft Start sions. The output voltage can be set as low as 0.6V with +/-0.5% accu- Current Limit and Thermal Protection racy making the XR71211 perfectly suited for powering low voltage devices such as FPGAs, DSPs, ASICs and other SOCs. Reverse Bias Protection RoHS compliant Green/Halogen Free An enable function, soft start and Power Good flag complete the feature 10-pin 3mm x 3mm DFN set. Built-in current limit, reverse bias and thermal protection ensures safe operation under abnormal operating conditions. APPLICATIONS The XR71211 is offered in RoHS compliant, green/halogen free 10-pin Point of Load Conversion 3x3mm DFN package. Microprocessor, DSP and FPGA Supplies Networking and Telecom Equipment Switching Supplies Post Regulation Ordering Information back page Typical Application VOUT, 50mV/Div, AC coupled 24mV overshoot VIN 1.4V - 2.625V VOUT>0.6V VIN VOUT R4 R3 R1 -20mV undershoot Enable XR71211 EN ADJ DFN-10 CIN COUT C1 PGOOD 0.5A-1.5A PGOOD GND R2 IOUT, 1A/Div 40s/Div Transient Response 2014 Exar Corporation 1 / 12 exar.com/XR71211 Rev 1BXR71211 Absolute Maximum Ratings Operating Conditions Stresses beyond the limits listed below may cause perma- Input Voltage Range (V , V , V )......1.4V to 2.625V IN EN PGOOD nent damage to the device. Exposure to any Absolute Max- Junction Temperature Range......................-40C to +125C imum Rating condition for extended periods may affect device reliability and lifetime. Thermal Resistance ( ) DFN10..........................40.5C/W JA Input Voltage (V , V )...........................................+3V IN PGOOD Enable Voltage (V ).......................................V +0.5V3V EN IN Storage Temperature..................................-65C to +150C Junction Temperature.................................................150C Lead Temperature (Soldering, 5 sec)..........................260C ESD Rating (HBM - Human Body Model), All pins..........2kV Electrical Characteristics Unless otherwise noted: T = 25C, V = V + 0.5V, I = 20mA, C = 10F, C = 22F. Limits applying over the full A IN OUT OUT IN OUT operating temperature range are denoted by a Symbol Parameter Conditions Min Typ Max Units V Input Voltage Operating Range 1.4 2.625 V IN a I 1.5 A OUTMAX Maximum Output Current I Ground Current EN active 2.0 mA GND EN active, I = 1.5A 2.5 3.5 mA OUT I Shutdown Current V =0V, I =0mA, PGOOD Floating 12 A SHDN EN OUT V ADJ Pin Voltage V = 2.5V, V > 1V 598.5 601.5 604.5 mV ADJ IN OUT 594.0 606.0 mV V = 1.8V 597.0 600.0 603.0 mV IN 592.0 605.0 mV V = 1.4V 596.0 599.0 602.0 mV IN 590.7 604.0 mV b V Dropout Voltage 250 mV DROP I = 1.5A, V = 1.35V OUT OUT R Output Voltage Load Regulation V = V + 0.5V, 20mA I 1.5A 0.2 % LOAD IN OUT OUT PSRR Power Supply Rejection Ratio f > 300kHz 30 dB V Output Noise Voltage 10Hz to 100kHz 200 V NOISE RMS I Current Limit V = 0.9 x V 1.6 3.2 A LIMIT OUT OUT(NOM) Reverse Bias Protection V Leak- V = 0V, V = 2.625V -10 A OUT IN OUT age Current Thermal Shutdown Temperature 160 C Thermal Shutdown Hysteresis 30 C 2014 Exar Corporation 2 / 12 exar.com/XR71211 Rev 1B