1 X 0MA EVALUATION KIT AVAILABLE m 3m m x 5m MAX8516/MAX8517/ MAX8518 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators General Description The MAX8516/MAX8517/MAX8518 low-dropout linear regulators operate from input voltages as low as 1.425V and are able to deliver up to 1A of continuous output current with a maximum dropout voltage of only 200mV. The output voltage can be set from 0.5V to (VIN - 0.2V) and is 1.4% accurate over load and line variations, from 0C to +85C. These regulators use small, 1F ceramic input capacitors and 4.7F ceramic output capacitors to deliver 1A output current. High bandwidth provides excellent transient response and limits the output voltage deviation to 45mV for a 20mA to 1A load step, with only a 4.7F ceramic output capacitor, and the voltage deviations can be reduced further by increasing the output capacitor. Designed with an internal p-channel MOSFET pass transistor, the MAX8516/MAX8517/MAX8518 feature low 340A (typ) supply current during dropout conditions. Soft-start reduces inrush current. Other features include a logic-controlled shutdown mode, short-circuit protection, and thermal-overload protection. The MAX8517 features a power-OK (POK) output that transitions high when the regulator output is within 10% of its nominal output voltage. The MAX8518 features a 150ms power-on reset output. The parts are packaged in a 10-pin MAX(R) package that Features 1.425V to 3.6V Input Voltage Range Guaranteed 200mV Dropout at 1A Output Current 1.4% Output Accuracy Over Load, Line, and Temperature (0C to +85C), 0.6% Initial Accuracy Compatible with Ceramic Capacitors Fast Transient Response 320A Operating Supply Current <25A Shutdown Supply Current Short-Circuit Protection Thermal-Overload Protection Soft-Start Limits Inrush Current Ordering Information TEMP RANGE PIN-PACKAGE MAX8516EUB PART -40C to +85C 10 MAX MAX8517EUB -40C to +85C 10 MAX MAX8517EUB/V+ -40C to +85C 10 MAX MAX8518EUB -40C to +85C 10 MAX /V Denotes an automotive qualified part. +Denotes lead(Pb)-free/RoHS-compliant package. Typical Operating Circuit INPUT 1.425V TO 3.6V includes an exposed pad for optimal power dispation. Applications IN_ 1F Servers Storage Networking Base Stations Optical Modules Post Regulators Notebooks PDAs ATE POWER-ON RESET POWER-OK ON MAX is a registered trademark of Maxim Integrated Products, Inc. OFF OUT_ OUTPUT 0.5V TO (VIN - 0.2V), 1A MAX8516 MAX8517 MAX8518 POR (MAX8518) 4.7F FB POK (MAX8517) EN GND Pin Configurations TOP VIEW EN 1 10 N.C. IN 2 IN 3 N.C. 4 7 N.C. 5 6 MAX8516 MAX 19-3188; Rev 3; 4/16 EN 1 10 N.C. 9 OUT IN 2 8 OUT IN 3 FB POK 4 7 GND N.C. 5 6 MAX8517 MAX EN 1 10 N.C. 9 OUT IN 2 8 OUT IN 3 FB N.C. 4 7 FB GND POR 5 6 GND MAX8518 MAX 9 OUT 8 OUT MAX8516/MAX8517/ MAX8518 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators Absolute Maximum Ratings IN, EN, POK (MAX8517), POR (MAX8518), FB to GND.........................................................-0.3V to +4.0V OUT to GND..................................................-0.3V to (IN + 0.3V) Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (TA = +70C, EP soldered to PC board ground) 10-Pin MAX (derate 10.3mW/C above +70C).........824mW Operating Temperature Range............................ -40C to +85C Junction Temperature.......................................................+150C Storage Temperature Range............................. -65C to +150C Lead Temperature (soldering, 10s).................................. +300C Soldering Temperature (soldering, 10s)........................... +240C 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 (Circuit of Figure 1. VIN = +1.8V, VOUT = +1.5V, EN = IN, IOUT = 1mA, TA = -40C to +85C, unless otherwise noted.) (Note 1) PARAMETER CONDITIONS MIN TYP MAX UNITS 3.600 V 1.38 V IN Input Voltage Range Input Undervoltage Lockout OUT 1.425 VIN rising, 70mV hysteresis 1.32 Output Voltage Range Load Regulation Line Regulation Dropout Voltage (VIN - VOUT) Current Limit Output Shutdown Leakage FB FB Threshold Accuracy FB Input Bias Current GND GND Supply Current GND Shutdown Current POK (MAX8517 ONLY) 0.5 IOUT = 1mA to 1A VIN = 1.425V, IOUT = 1A, VFB = 480mV 1.6 IOUT = 10mA, TA = +85C 497 VOUT = 1.225V to 3V, VIN = VOUT + 0.2V to 3.6V, IOUT = 1mA to 1A 493 VIN = 3.6V, VOUT = 0, VEN = 0 VFB = 0.5V, VIN = 3.6V 0 +0.15 %/V 100 200 mV 2 2.4 A 0.25 25 A 500 503 507 0.001 1 320 340 600 VIN = 3.6V, EN = GND 0.25 25 Dropout, VIN = 3.6V, VFB = 480mV VFB = 0.4V or 0.6V, IPOK = 1mA VPOK = 3.6V From FB to POK FB high 540 550 560 FB low 440 450 460 25 V %/A VIN = 3.6V, VOUT = 3V, IOUT = 100mA POK Output Voltage Low www.maximintegrated.com -0.15 VIN = 3.6V, VOUT = 3V, VFB = 480mV VFB moving out of regulation, VHYS = 10mV, IN = 1.425V to 3.6V POK Fault Delay Time 3.4 0.1 VIN = 1.425V to 3.6V, VOUT = 1.225V, IOUT = 1mA POK Threshold POK Output Current High 1.35 mV A A A mV 25 200 mV 0.001 1 A 50 100 s Maxim Integrated 2 MAX8516/MAX8517/ MAX8518 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators Electrical Characteristics (continued) (Circuit of Figure 1. VIN = +1.8V, VOUT = +1.5V, EN = IN, IOUT = 1mA, TA = -40C to +85C, unless otherwise noted.) (Note 1) PARAMETER CONDITIONS MIN TYP MAX UNITS 440 450 460 mV 25 200 mV POR (MAX8518 ONLY) POR Reset Threshold VFB falling, VHYS = 10mV, VIN = 1.425V to 3.6V POR Output Voltage Low VFB = 0.4V or 0.6V, IPOR = 1mA POR Output Current High VPOR = 3.6V POR Rising Delay Time From FB to POR 105 0.001 1 A 150 210 ms EN Enable Input Threshold VIN = 1.425V to 3.6V Enable Input Bias Current VEN = 0 or 3.6V THERMAL SHUTDOWN Thermal-Shutdown Threshold EN rising EN falling +1 TJ rising Output on or off A +165 TJ falling C +150 IOUT = 20mA to 1A to 20mA, tRISE = tFALL = 1s Line Transient V 0.4 -1 OUTPUT TRANSIENT Load Transient 1.2 VIN = 0.5V, tRISE = tFALL = 5s 3 % 3 % Note 1: Specifications to TA = -40C are guaranteed by design, not production tested. Note 2: Measurements at high current are pulse tested, such that the junction temperature is ambient temperature. Minimum supply voltage for output accuracy must be at least 1.425V. Typical Operating Characteristics (Circuit of Figure 1, VIN = +1.8V, VOUT = +1.5V, IOUT = 1A, COUT = 4.7F, CIN = 1F, TA = +25C.) 1.50 1.45 1.40 1.498 TA = +25C 1.496 TA = -40C 1.494 0 0.6 1.2 1.8 2.4 INPUT VOLTAGE (V) www.maximintegrated.com 3.0 3.6 1.490 GROUND CURRENT vs. INPUT VOLTAGE 500 ILOAD = 1A 400 300 ILOAD = 0.5A 200 ILOAD = 0A 100 0 200 400 600 800 LOAD CURRENT (mA) 1000 1200 MAX8516/17/18 toc03 TA = +85C 1.500 1.492 1.35 1.30 1.502 GROUND CURRENT (A) OUTPUT VOLTAGE (V) 1.55 OUTPUT VOLTAGE vs. LOAD CURRENT MAX8516/17/18 toc02 TA = -40C TO +85C OUTPUT VOLTAGE (V) 1.60 MAX8516/17/18 toc01 OUTPUT VOLTAGE vs. INPUT VOLTAGE 0 0 0.6 1.2 1.8 2.4 3.0 3.6 INPUT VOLTAGE (V) Maxim Integrated 3 MAX8516/MAX8517/ MAX8518 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators Typical Operating Characteristics (continued) (Circuit of Figure 1, VIN = +1.8V, VOUT = +1.5V, IOUT = 1A, COUT = 4.7F, CIN = 1F, TA = +25C.) DROPOUT VOLTAGE vs. LOAD CURRENT GROUND CURRENT vs. LOAD CURRENT 325 TA = +25C TA = -40C 300 275 250 0 200 400 600 800 1000 MAX8516/17/18 toc05 TA = +85C 350 125 DROPOUT VOLTAGE (mV) MAX8516/17/18 toc04 GROUND CURRENT (A) 375 100 75 50 25 0 1200 200 0 400 600 800 LOAD CURRENT (mA) LOAD CURRENT (mA) LINE INPUT TRANSIENT (VIN = +1.8V TO +2.5V, ILOAD = 1A) LOAD-TRANSIENT RESPONSE (ILOAD = 0.1A TO 1A) MAX8516/17/18 toc06 1000 MAX8516/17/18 toc07 VOUT AC-COUPLED 20mV/div VOUT AC-COUPLED 50mV/div VIN AC-COUPLED 0.5V/div ILOAD 1A/div CIN = 220F ELECTROLYTIC CAP CLOSE TO IN 100s/div 40s/div PSRR vs. FREQUENCY (MAX8516) SHUTDOWN RESPONSE MAX8516/17/18 toc08 MAX8516/17/18 toc09 80 70 IIN 1A/div EN 2V/div 100s/div PSRR (dB) 60 VOUT 1V/div 50 40 30 20 10 0 ILOAD = 100mA 0.01 0.1 1 10 100 1000 FREQUENCY (kHz) www.maximintegrated.com Maxim Integrated 4 MAX8516/MAX8517/ MAX8518 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators Typical Operating Characteristics (continued) (Circuit of Figure 1, VIN = +1.8V, VOUT = +1.5V, IOUT = 1A, COUT = 4.7F, CIN = 1F, TA = +25C.) FB VOLTAGE vs. TEMPERATURE OUTPUT RIPPLE VOLTAGE MAX8516/17/18 toc11 MAX8516/17/18 toc10 FB VOLTAGE (mV) 502 501 VOUT AC-COUPLED 1mV/div 500 499 498 ILOAD = 10mA -40 -15 10 35 60 85 100s/div TEMPERATURE (C) OVERCURRENT THRESHOLD vs. TEMPERATURE SHORT-CIRCUIT CURRENT MAX8516/17/18 toc13 MAX8516/17/18 toc12 OVERCURRENT THRESHOLD (A) 1.95 1.90 VOUT 1V/div 1.85 IOUT 2A/div 1.80 1.75 -40 -15 10 35 60 85 100s/div TEMPERATURE (C) CASE TEMPERATURE (C) 75 MAX8516/17/18 toc14 CASE TEMPERATURE vs. LOAD CURRENT VIN = 2.5V; TA = +25C 60 45 30 15 0 0 200 400 600 800 1000 LOAD CURRENT (mA) www.maximintegrated.com Maxim Integrated 5 MAX8516/MAX8517/ MAX8518 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators Pin Description PIN NAME DESCRIPTION MAX8516 MAX8517 MAX8518 1 1 1 EN Enable Input. Set low to place the device in low-current shutdown mode. Set high for normal operation. 2, 3 2, 3 2, 3 IN Regulator Input. VIN can range from +1.425V to +3.6V. Bypass with a 1F or higher ceramic capacitor to GND. 4, 5, 10 5, 10 4, 10 N.C. No Connection. Pin 10 is internally pulled down to GND with a 10k resistor. Leave floating. 6 6 6 GND Ground 7 7 7 FB Feedback Pin. Connect to output through a voltage-divider to set the output. 8, 9 8, 9 8, 9 OUT Regulator Output. Bypass with a 4.7F ceramic capacitor to GND (a smaller capacitor can be used if maximum load is less than 1A, i.e., COUT = IOUT (max) x (1F/200mA). -- 4 -- POK Power-OK Output (MAX8517 Only). Open-drain output. Connect to a positive supply with a pullup resistor. If not used, leave pin unconnected. See the Detailed Description. -- -- 5 POR Power-On Reset Output. Open-drain output. Connect to a positive supply with a pullup resistor. If not used, leave pin unconnected (see the Detailed Description for more details). GND Exposed Pad on the Underside of the Package. Solder to the ground plane for proper heat dissipation. EP Functional Diagram IN THRESHOLD OVERTHERMAL PROTECTION REF EN OVERTHERMAL PROTECTION 0.50V 0.55V 0.45V UNDERVOLTAGE LOCKOUT ERROR AMP WITH SOFT-START MOS DRIVER WITH ILIMIT OUT FB MAX8516 MAX8517 MAX8518 POK (MAX8517 ONLY) POR (MAX8518 ONLY) GND www.maximintegrated.com Maxim Integrated 6 MAX8516/MAX8517/ MAX8518 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators Detailed Description Output Voltage Selection The MAX8516/MAX8517/MAX8518 are low-input, lowdropout, PMOS regulators capable of delivering up to 1A of output current with as little as 200mV of headroom from input to output. The PMOS output stage can be driven from input voltages down to +1.425V without sacrificing stability or transient performance. Since these regulators have a PMOS output device, supply current is not a significant function of load or input headroom. The MAX8516/MAX8517/MAX8518 feature an adjustable output voltage from 0.5V to 3.4V, using two external resistors connected as a voltage-divider to FB as shown in Figure 1. The output voltage is set by the following equation: Internal P-Channel Pass Transistor where typically VFB = 0.5V. Choose R2 5k to optimize quiescent current, accuracy, and high-frequency powersupply rejection. To simplify resistor selection: The MAX8516/MAX8517/MAX8518 feature a 100m (typ) p-channel MOSFET pass transistor. Unlike similar designs using PNP pass transistors, p-channel MOSFETs require no base drive, which reduces quiescent current. PNP-based regulators also waste considerable current in dropout when the pass transistor saturates and use high base-drive currents under large loads. The MAX8516/ MAX8517/MAX8518 do not suffer from these problems and consume only 340A (typ) of quiescent current under heavy loads, as well as in dropout. Short-Circuit/Thermal Fault Protection The MAX8516/MAX8517/MAX8518 are fully protected from a short circuit at the output through current-limiting and thermal-overload circuitry. In the fault condition when the output is shorted to ground, the output current is limited to 2A. Under these conditions, the part quickly heats up. When the junction temperature reaches +165C, the thermal-overload circuitry turns off the output, allowing the part to cool down. When the junction temperature cools to +150C, the output turns back on and tries to reestablish regulation. Current limiting and thermal protection continue until the fault is removed. For continuous operation, do not exceed the absolute maximum junction-temperature rating of TJ = +150C. +1.425V TO +3.6V IN OUT IN MAX8516 OUT MAX8517 MAX8518 ADJUSTABLE OUTPUT 1F 100k* POK (MAX8517) OR POR (MAX8518) ENABLE SHUTDOWN EN *FOR MAX8517 AND MAX8518 Figure 1. Typical Application Circuit www.maximintegrated.com R1 FB R2 GND 4.7F R1 V = OUT VFB 1 + R2 V R1 = R2 OUT - 1 VFB Soft-Start Inherent soft-start limits inrush current. Peak inrush current is dependent on the value of COUT and can be calculated as follows: (F) C = ILOAD + OUT IINRUSH 66 Shutdown Mode The MAX8516/MAX8517/MAX8518 include an enable input. To shut down the device, pull EN to GND. For normal operation, connect the EN to IN. During shutdown, an internal 10k resistor pulls down the output. Power-OK (MAX8517 Only) The MAX8517 features a power-OK (POK) output to indicate the status of the output. POK remains high when the regulator output is within 10% of its nominal output voltage. If the output voltage falls or rises outside this range, POK transitions low. This open-drain output requires an external pullup resistor to IN. An internal delay circuit prevents POK from switching for 50s (typ) after the trip threshold is initially reached. If the part is in shutdown mode, POK is low. Power-On Reset (MAX8518 Only) The MAX8518 features a power-on reset (POR) output that transitions high 140ms (typ) after the output has risen above 90% of its final value. This open-drain output requires an external pullup resistor to IN. If the part is in shutdown mode, falls below 90% of the nominal output voltage, or experiences a short-circuit or thermal fault, POR immediately transitions low. Maxim Integrated 7 MAX8516/MAX8517/ MAX8518 Operating Region and Power Dissipation The maximum power dissipation depends on the thermal resistance of the IC package and circuit board, the temperature difference between the die junction and ambient air, and the rate of airflow. The power dissipated in the device is P = IOUT x (VIN - VOUT). The package features an exposed thermal pad on its underside. This pad lowers the thermal resistance of the package by providing a direct heat conduction path from the die to the PCB. Additionally, the ground pins (GND) perform the dual function of providing an electrical connection to system ground and channeling heat away. Connect the exposed backside pad and GND to the system ground using a large pad or ground plane, or multiple vias to the ground plane layer. Applications Information Capacitor Selection and Regulator Stability Capacitors are required at the MAX8516/MAX8517/ MAX8518 inputs and outputs for stable operation over the full temperature range and with load currents up to 1A. Connect a 1F capacitor between IN and ground and a 4.7F capacitor with low equivalent series resistance (ESR) between OUT and ground for 1A output current. The input capacitor (CIN) lowers the source impedance of the input supply. If input-supply source impedance is high, place a larger input capacitor close to IN to prevent VIN sagging due to load transients. Smaller output capacitors can be used for output currents less than 1A. Calculate COUT as follows: 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators Noise, PSRR, and Transient Response The MAX8516/MAX8517/MAX8518 are designed to operate with low dropout voltages and low quiescent currents while still maintaining good noise, transient response, and AC rejection (see the Typical Operating Characteristics for a plot of Power-Supply Rejection Ratio (PSRR) vs. Frequency). When operating from noisy sources, improved supply-noise rejection and transient response can be achieved by increasing the values of the input and output bypass capacitors and through passive filtering techniques. The MAX8516/MAX8517/MAX8518 loadtransient response graphs (see the Typical Operating Characteristics) show two components of the output response: a DC shift from the output impedance due to the load current change, and the transient response. A typical transient overshoot for a step change in the load current from 20mA to 1A is 45mV. Use larger output ceramic capacitors greater than 4.7F up to 50F to attenuate the overshoot. Chip Information TRANSISTOR COUNT: 2849 PROCESS: BiCMOS = C OUT I OUT(MAX) x (1F / 200mA) www.maximintegrated.com Maxim Integrated 8 MAX8516/MAX8517/ MAX8518 Chip Information TRANSISTOR COUNT: 2849 PROCESS: BiCMOS www.maximintegrated.com 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 10 MAX U10E+3 21-0109 Maxim Integrated 9 MAX8516/MAX8517/ MAX8518 1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulators Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 0 2/04 Initial release 1 4/04 Removed future product asterisks for MAX8517/MAX8518. Updated Electrical Characteristics and Pin Description. 2 9/09 Added MAX8517 automotive package to Ordering Information. 3 4/16 Added lead-free designation DESCRIPTION -- 1-3, 6 1 1, 9 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated's website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. (c) 2016 Maxim Integrated Products, Inc. 10 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX8516EUB+ MAX8516EUB+T MAX8517EUB+ MAX8517EUB+T MAX8518EUB+ MAX8518EUB+T MAX8516EUB/V+ MAX8516EUB/V+T