MAX25302BATD/V+T

Click here to ask an associate for production status of specific part numbers. MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators General Description Benefits and Features The MAX25302A/MAX25302B are 1.7V to 5.5V VIN, lownoise linear regulators that delivers up to 2A of output current with only 5.1μVRMS of output noise from 10Hz to 100kHz. The regulator maintains ±1% output accuracy over a wide input voltage range, requiring only 100mV of input-to-output headroom at full load. The 1.3mA no-load supply current is independent of dropout voltage. ● Delivers Flexible Operating Range • 1.7V to 5.5V Input Voltage Range • 0.6V to 5.0V Programmable Output Voltage • 2A Maximum Output Current • 100mV Maximum Dropout at 2A Load • < 1.5μA Shutdown Supply Current The output voltage on the MAX25302B can be adjusted to a value in the range of 0.6V to 5.0V by using two external resistors. The MAX25302B also includes an activehigh POK signal for trouble-free load startup. The MAX25302A has nine pin-selectable output voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 4.0V, and 5V. All versions include a programmable output soft-start rate, output overcurrent, and thermal-overload protection. The MAX25302A/MAX25302B are offered in a 3mm x 3.5mm, 14-pin TDFN package. Applications ● Automotive Electronics ● High-End Audio Systems ● High-Resolution Data-Acquisition Systems Ordering Information appears at end of data sheet. ● Reduces Noise and Improves Accuracy • ±1% DC Accuracy over Load, Line, and Temperature • 5.1µVRMS Output Noise, 10Hz to 100kHz • 1.3mA Quiescent Supply Current • > 70dB PSRR at 10kHz ● Enables Ease-of-Use and Robust Protection • Stable with 8μF (min) Output Capacitance • Programmable Soft-Start Rate • Overcurrent and Overtemperature Protection • Output-to-Input Reverse-Current Protection • Power-OK Status Pin ● Reduces PC Board Area • 3mm x 3.5mm, 14-pin TDFN Package ● AEC-Q100 • -40°C to +125°C Operating Temperature 19-100791; Rev 1; 1/23 © 2023 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. | Tel: 781.329.4700 | © 2023 Analog Devices, Inc. All rights reserved. MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators Typical Operating Circuits VIN (1.7V TO 5.5V) IN VOUT (1.2V TO 5.0V) OUT CBYP 47nF CIN 22µF GND COUT 22µF BYP MAX25302A TDFN ENABLE EN OUTS SELB VOUT SELECT: TO GND, IN OR FLOAT SELA VIN (1.7V TO 5.5V) EP IN OUT CIN 22µF CBYP 47nF GND COUT 22µF BYP MAX25302B ENABLE EN VOUT ADJUSTABLE (0.6V TO 5.0V) TDFN R3 100kΩ POK RESETB R1 GS EP FB R2 www.analog.com Analog Devices | 2 MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators Absolute Maximum Ratings IN, OUT, SELA, SELB, EN to GND .......................... -0.3V to +6V POK, OUTS, FB, GS to GND ................................... -0.3V to +6V BYP .......................................................................... -0.3V to +2V Output Short-Circuit Duration ..................................... Continuous Continuous Power Dissipation TDFN (TA = +70°C, derate 24.4mW/°C above +70°C.) ............................................. 1951mW Operating Temperature Range ...........................-40°C to +125°C Maximum Junction Temperature ...................................... +150°C Storage Temperature Range ..............................-65°C to +150°C Soldering Temperature (reflow) ........................................ +260°C 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 Information TDFN Package Code T143A3+1C Outline Number 21-100420 Land Pattern Number 90-100149 Thermal Resistance, Single-Layer Board: Junction to Ambient (θJA) 54°C/W Junction to Case (θJC) 8°C/W Thermal Resistance, Four-Layer Board: Junction to Ambient (θJA) 41°C/W Junction to Case (θJC) 8°C/W Electrical Characteristics (VIN = 3.6V, TJ = -40°C to +125°C, CBYP = 47nF, CIN = 22µF, COUT = 22µF, Typical Operating Circuit, unless otherwise specified. (Note 1)) PARAMETER Input Voltage Range SYMBOL VIN CONDITIONS MIN Guaranteed by output accuracy 1.7 Input Undervoltage Lockout VUVLO VIN rising, 100mV hysteresis 1.5 Output Voltage Range VOUT VIN > VOUT + 0.1V 0.6 Output Capacitance COUT For stability and proper operation 8 VEN = VIN = 3.6V, IOUT = 0mA Supply Current IIN VEN = 0V 1.6 0.04 TA = 125°C 1.5 ACC IOUT from 0.1mA to 2A, VIN from VOUT + 0.3V to 5.5V, VIN > 1.7V 0.594 OUT Regulation Accuracy (MAX25302A Only) ACC IOUT from 0.1mA to 2A, VIN from VOUT + 0.3V to 5.5V, VIN > 1.7V -1 VIN = 2.8V, VOUT = 2.5V, IOUT from 0.1mA to 2A Load Transient Output voltage deviation with a load change of IOUT = 50mA to 2.0A to 50mA, with tRISE = tFALL = 1μs UNITS 5.5 V 1.7 V 5.0 V 22 TA = +25°C Load Regulation MAX μF 1300 FB Regulation Accuracy (MAX25302B Only) www.analog.com TYP 0.6 1.5 μA 0.606 V +1 % 0.032 % 50 mVP-P Analog Devices | 3 MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators Electrical Characteristics (continued) (VIN = 3.6V, TJ = -40°C to +125°C, CBYP = 47nF, CIN = 22µF, COUT = 22µF, Typical Operating Circuit, unless otherwise specified. (Note 1)) PARAMETER SYMBOL CONDITIONS Line Regulation VIN from 2.8V to 5.5V, VOUT = 2.5V, IOUT = 800mA Line Transient VIN = 4V to 5V to 4V, IOUT = 2A, tRISE = tFALL = 5µs MIN VIN = 3.6V TYP %/V 3 mVP-P 100 VIN = 2.5V (Note 3) 65 200 VIN = 1.7V 100 300 2.8 3.4 IOUT = 2A Current Limit VOUT = 95% of regulation, VIN - VOUT = 0.5V, VIN = 3.6V Output Noise IOUT = 100mA, CBYP = 100nF Power Supply Rejection Ratio PSRR VIN = VOUT + 400mV, IOUT = 1.6A BYP Capacitor Range CBYP Regulator remain stable 2.2 f = 10Hz to 100kHz 5.1 f = 1kHz 70 f = 10kHz 70 f = 100kHz 60 f = 1MHz 50 EN Input Threshold VIN from 1.7V to 5.5V EN rising 0.8 EN Input Threshold VIN from 1.7V to 5.5V EN falling 0.4 0.7 VEN from 1.7V to 5.5V TA = +25ºC -1 +0.001 VEN from 1.7V to 5.5V TA = +125°C POK Voltage, Low (MAX25302B Only) VOL POK Leakage Current (MAX25302B Only) SELA/B Input Resistance (MAX25302A Only) RINSELA/B SELA/B Input Capacitance (MAX25302A Only) CINSELA/B IN Reverse-Current Threshold IIN_REV Thermal Shutdown Threshold μF μA 1.2 V V +1 μA VOUT rising 88 VOUT falling TA = +25°C 91 -0.1 TA = +125°C When Hi-Z 94 88 10 100 +0.001 +0.1 0.01 When shorted to GND or IN 500 1 10 VOUT = 3.6V, when VIN falls to 0V % mV μA Ω MΩ When Hi-Z TJ when output turns on/off dB 0.01 IPOK = 1mA VPOK = 5.5V A μVRMS 0.1 From BYP to GND during startup VOUT when POK switches mV 40 0.001 BYP Soft-Start Current POK Threshold (MAX25302B Only) UNITS 0.054 47 Dropout Voltage (Note 2) EN Input Leakage Current MAX 800 TJ rising 165 TJ falling 150 pF mA °C Note 1: Limits over the specified operating temperature and supply voltage range are guaranteed by design and characterization, and production tested at room temperature only. www.analog.com Analog Devices | 4 MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators Note 2: Dropout voltage is defined as (VIN - VOUT) when VOUT is 95% of its nominal value. Note 3: Guaranteed by design and characterization. www.analog.com Analog Devices | 5 MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators Typical Operating Characteristics (MAX25302BATD+, VIN = 3.6V, VOUT = 2.5V, CBYP = 47nF, CIN = 22μF, COUT = 22μF, TA = +25°C, unless otherwise noted.) www.analog.com Analog Devices | 6 MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators Pin Configurations MAX25302A IN 1 14 OUT IN 2 13 OUT IN 3 12 OUT IN 4 11 OUT GND 5 10 BYP EN 6 9 OUTS SELA 7 8 SELB EXPOSED PAD 3mm x 3.5mm 14L TDFN TOP VIEW www.analog.com Analog Devices | 7 MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators MAX25302B IN 1 14 OUT IN 2 13 OUT IN 3 12 OUT IN 4 11 OUT GND 5 10 BYP EN 6 9 FB GS 7 8 POK EXPOSED PAD 3mm x 3.5mm 14L TDFN TOP VIEW Pin Description PIN NAME FUNCTION 1, 2, 3, 4 IN Regulator Supply Input. Connect to a voltage between 1.7V and 5.5V and bypass with a 22µF capacitor from IN to GND. 5 5 GND 6 6 EN Enable Input. Connect this pin to a logic signal to enable (VEN high) or disable (VEN low) the regulator output. Connect to IN to keep the output enable whenever a valid supply voltage is present. 7 — SELA Output Select Input. Connect to GND, IN, or Hi-Z to select one of three states. The states of the SELA and SELB pins are read when the device is enabled, and are used to select one of nine output voltages. — 7 GS MAX25302A MAX25302B 1, 2, 3, 4 www.analog.com Regulator Ground. Connect IN and OUT bypass capacitor GND connections to this pin for best performance. Ground Sense. Connect GS to GND. Analog Devices | 8 MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators Pin Description (continued) PIN NAME FUNCTION — SELB Output Select Input. Connect to GND, IN, or Hi-Z to select one of three states. The states of the SELA and SELB pins are read when the device is enabled, and are used to select one of nine output voltages. — 8 POK Active-High Power-OK Output. Connect a pull-up resistor from this pin to a supply to create a reset signal that goes high after the regulator output has reached its regulation voltage. 9 — OUTS — 9 FB 10 10 BYP Bypass Capacitor Input. Connect a capacitor with a value from 0.001μF to 0.1µF between OUT and BYP to reduce output noise and set the regulator soft-start rate. 11, 12, 13, 14 11, 12, 13, 14 OUT Regulator Output. Sources up to 2A at the output regulation voltage. Bypass with a 22µF (8µF minimum, including voltage derating) low-ESR (< 0.03Ω) capacitor to GND. EP EP EP Exposed Pad (TDFN Only). Connect the exposed pad to a ground plane with low thermal resistance to ambient to provide best heat sinking. MAX25302A MAX25302B 8 www.analog.com Output Voltage Sense Input. Connect to the load at a point where accurate regulation is required to eliminate resistive metal drops. Feedback Divider Input. Connect a resistor-divider string from OUT to GND with the midpoint tied to this pin to set the output voltage. In the Typical Application Circuits, VOUT = 0.6V x (1 + R1/R2). Analog Devices | 9 MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators Simplified Functional Diagram EN IN CURRENT LIMIT THERMAL PROTECTION REVERSE CURRENT PROTECTION CONTROL OUT BYP BYP REF 0.6V MAX25302B ONLY EA POK 0.54V MAX25302A MAX25302B MAX25302B ONLY MAX25302A ONLY MAX25302A ONLY FB OUTS SELA VOLTAGE SELECT SELB www.analog.com GND Analog Devices | 10 MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators Detailed Description The MAX25302A/MAX25302B are high-performance pMOS linear regulators that are optimized for low noise, high-inputsupply rejection, low dropout voltage, and small solution size. They can deliver up to a maximum load current of 2A while maintaining a low dropout voltage of 47mV. An enable input allows the regulator to be powered up and down, while an internal soft-start circuit controls the inrush current at the input. SELA and SELB inputs are provided on the A version for selecting one of nine output voltages and a power-OK output is provided on the B version for system powerup sequencing. Enable (EN) The MAX25302A/MAX25302B include an enable pin (EN). Pull EN low to shut down the output, or drive EN high to enable the output. If a separate shutdown signal is not available, connect EN to IN. Bypass (BYP) The capacitor connected from BYP to OUT filters noise at the reference, feedback resistors, and regulator input stage. It provides a high-speed feedback path for improved transient response. A 10nF capacitor rolls off noise at around 32Hz. The slew rate of the output voltage during startup is also determined by the BYP capacitor. A 10nF capacitor sets the slew rate to 5V/ms. This startup rate results in a 110mA slew current drawn from the input at startup to charge 22μF output capacitance. The BYP capacitor value can be adjusted from 1nF to 100nF to change the startup slew rate according to the following formula: 5V 10nF StartupSlewRate = ms x C BYP where CBYP is in nF. Note that this slew rate applies only at startup. Recovery from a short circuit will occur at a slew rate approximately 500 times slower. Also, note that being a low-frequency filter node, BYP is sensitive to leakage. BYP leakage currents above 10nA cause measurable inaccuracy at the output and should be avoided. Protection Features The MAX25302A/MAX25302B are fully protected from an output short circuit by a current-limiting and thermal-overload circuit. If the output is shorted to GND, the output current is limited to 2.8A (typ). Under these conditions, the device quickly heats up. When the junction temperature reaches +165°C, a thermal-limit circuit shuts the output device off. Once the device cools to +150°C, the output turns back on in an attempt to reestablish regulation. If the fault persists, the output current cycles on and off as the junction temperature slews between +150°C and +165°C. The MAX25302A/MAX25302B are also protected against reverse current when the output voltage is higher than the input. In the event that extra output capacitance is used at the output, a power down transient at the input would normally cause a large reverse current through a conventional regulator. The MAX25302A/MAX25302B include a reverse-voltage detector that trips when IN drops 10mV below OUT, shutting off the regulator and opening the pMOS body diode connection and preventing any reverse current. Output Voltage Configuration (MAX25302A) The MAX25302A has two configuration pins, SELA and SELB, that are read during power-up to determine the output regulation voltage. Table 1. MAX25302A Output Configuration Table www.analog.com VOUT (V) SELA SELB 1.2 Hi-Z IN 1.5 IN Hi-Z Analog Devices | 11 MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators Table 1. MAX25302A Output Configuration Table (continued) 1.8 Hi-Z GND 2.5 Hi-Z Hi-Z 3.0 GND GND 3.1 GND IN 3.3 GND Hi-Z 4.0 IN GND 5.0 IN IN Output Voltage Configuration (MAX25302B) The MAX25302B uses external feedback resistors to set the output regulation voltage as shown in the Typical Operating Circuits. The output voltage can be set form 0.6V to 5.0V. Set the lower feedback resistor R2 to 300kΩ or less to minimize FB input bias current error. Then, calculate the value of the upper feedback resistor R1 as follows: VOUT R1 = R2x( V − 1) FB where VFB is the feedback regulation voltage of 0.6V. To set the output to 2.4V, for example, R1 should be: 2.4V R1 = 300kΩx( 0.6V − 1) = 900kΩ Power-OK (MAX25302B) The MAX25302B includes an additional open-drain output, POK, that goes high to indicate that the output voltage is in regulation. Connect a pull-up resistor from this pin to an external supply. During startup, POK stays low until the output voltage rises to 91% (typ) of its regulation level. If an overload event occurs at the output, or the output is shutdown, POK goes low. Input Capacitor A 22μF ceramic capacitor is recommended for the input. Select a capacitor that does not degrade significantly over temperature and DC bias. Capacitors with X5R or X7R temperature characteristics generally perform well. Output Capacitor A minimum of 8μF capacitance is required at OUT to ensure stable operation. Select a ceramic capacitor that maintains its capacitance (8μF minimum) over temperature and DC bias. Capacitors with X5R or X7R temperature characteristics generally perform well. Thermal Considerations The MAX25302A/MAX25302B are packaged in a 14-pin, 3mm x 3.5mm TDFN package with an exposed paddle. The exposed paddle is the main thermal path for heat to escape the IC, and therefore, must be connected to a ground plane with thermal vias to allow heat to dissipate from the device. Thermal properties of the package are given in the Package Information section. www.analog.com Analog Devices | 12 MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators Typical Application Circuits VIN (1.7V TO 5.5V) IN VOUT (1.2V TO 5.0V) OUT CBYP 47nF CIN 22µF GND COUT 22µF BYP MAX25302A TDFN ENABLE EN OUTS SELB VOUT SELECT: TO GND, IN OR FLOAT SELA VIN (1.7V TO 5.5V) EP IN OUT CIN 22µF CBYP 47nF GND COUT 22µF BYP MAX25302B ENABLE VOUT ADJUSTABLE (0.6V TO 5.0V) TDFN EN R3 100kΩ POK RESETB R1 GS EP FB R2 Ordering Information TEMP RANGE PIN-PACKAGE MAX25302AATD/ V+ PART NUMBER -40°C to +125°C 14-pin, 3mm x 3.5mm, TDFN FEATURES Pin-Selectable Output Voltage, Enable MAX25302BATD/ V+ -40°C to +125°C 14-pin, 3mm x 3.5mm, TDFN External Resistor Feedback, POK Output with Delay, Enable /V Denotes an automotive qualified part + Denotes a lead(Pb)-free/RoHS-compliant package. Devices are also available in tape-and-reel packaging. Specify tape and reel by adding “T” to the part number when ordering. www.analog.com Analog Devices | 13 MAX25302A/MAX25302B 2A Automotive Low-Noise LDO Linear Regulators Revision History REVISION NUMBER REVISION DATE 0 8/20 Initial release 1 1/23 Updated Pin Configuration, Pin Description table, Detailed Description, and Ordering Information table DESCRIPTION PAGES CHANGED — 7, 8, 9, 12, 13 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. w w w . a n a l o g . c o m Analog Devices | 14