MAX38904AATD+

Click here for production status of specific part numbers. MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP General Description Benefits and Features The MAX38904 is a 1.7V–5.5V VIN, low-noise linear regulator 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 MAX38904B can be adjusted to a value in the range of 0.6V to 5.0V by using two external resistors. The MAX38904B also includes an active-high POK signal for trouble-free load startup. The MAX38904A has nine pin-selectable output voltages 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 4.0V, and 5V. The wafer-level package (WLP) versions of the MAX38904 are available as C and D variants. The MAX38904C uses external feedback resistors for adjusting the output voltage, while the MAX38904D has factory preset output voltages over the range of 0.7V to 5.0V in 50mV steps. All versions include a programmable output soft-start rate, output overcurrent, and thermal overload protection. The MAX38904A/B are offered in a 3mm x 3mm, 14-pin TDFN package, while the MAX38904C/D are available in 5 x 3 bump, 2.2mm x 1.37mm WLP, 0.4mm pitch. Applications ● Communication Systems, Test Equipment, Medical Equipment ● High-End Audio Systems ● High-Resolution Data Acquisition Systems 19-100443; Rev 2; 3/19 ● 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 Size, Improves Reliability • 3mm x 3mm 14-pin TDFN Package and 2.2mm x 1.37mm, 5 x 3 Bump, 0.4mm Pitch WLP • -40ºC to 125ºC Operating Temperature Ordering Information appears at end of data sheet. MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP Simplified Block Diagram IN (1.7V TO 5.5V) IN OUT (1.5V/2A) OUT C1 22µF GND BYP C2 47nF R3 100k C3 22µF MAX38904B ENABLE EN RESETB POK R2 90k GS EP FB R1 60k www.maximintegrated.com Maxim Integrated | 2 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP Absolute Maximum Ratings IN, OUT, SELA, SELB, EN, 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 Continuous Power Dissipation WLP (TA = +70°C, derate 16.4mW/°C above +70°C.) .............................................1312mW 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 T1433+2C Outline Number 21-0137 Land Pattern Number 90-0063 Thermal Resistance, Single-Layer Board: Junction-to-Ambient (θJA) 54°C/W Junction-to-Case Thermal Resistance (θJC) 8°C/W Thermal Resistance, Four-Layer Board: Junction-to-Ambient (θJA) 41°C/W Junction-to-Case Thermal Resistance (θJC) 8°C/W WLP Package Code N151B2+1 Outline Number 21-100315 Land Pattern Number Refer to Application Note 1891 Thermal Resistance, Four-Layer Board: Junction-to-Ambient (θJA) 61.55°C/W Junction-to-Case Thermal Resistance (θJC) N/A 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 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. www.maximintegrated.com Maxim Integrated | 3 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP 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 CONDITIONS MIN Guaranteed by Output Accuracy 1.7 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 Input Undervoltage Lockout VIN 8 VEN = VIN = 3.6V, IOUT = 0mA Supply Current IIN VEN = 0V TYP 1.6 1.5 FB Regulation Accuracy (MAX38904B/C Only) ACC IOUT from 0.1mA to 2A, VIN from VOUT + 0.3V to 5.5V, VIN > 1.7V 0.594 OUT Regulation Accuracy (MAX38904A/ D Only) ACC IOUT from 0.1mA to 2A, VIN from VOUT + 0.3V to 5.5V, VIN > 1.7V -1 Output Voltage deviation with a load change of IOUT = 50mA to 2.0A to 50mA, with tRISE = tFALL = 1μs 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 V 0.6 1.5 μA 0.606 V +1 % 0.032 % 50 mVP-P 0.054 %/V 3 mVP-P 47 100 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 V μF VIN = 3.6V Dropout Voltage (Note 2) 2.2 f = 10Hz to 100kHz 5.1 f = 1kHz 70 f = 10kHz 70 f = 100kHz 60 f = 1MHz mV A μVRMS dB 40 0.001 0.1 BYP Soft-Start Current From BYP to GND during startup 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 www.maximintegrated.com 1.7 1300 0.04 Load Transient V 5.0 TA = 125°C VIN = 2.8V, VOUT = 2.5V, IOUT from 0.1mA to 2A UNITS 5.5 22 TA = +25°C Load Regulation MAX 0.4 0.7 μF μA 1.2 V V Maxim Integrated | 4 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP 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 EN Input Leakage Current POK Threshold (MAX38904B Only) POK Voltage, Low (MAX38904B Only) TA = +25ºC VEN from 1.7V to 5.5V TA = +125°C VOUT when POK switches VOL POK Leakage Current (MAX38904B Only) RINSELA/B SELA/B Input Capacitance (MAX38904A Only) CINSELA/B IN Reverse-Current Threshold IIN_REV MIN TYP MAX -1 +0.001 +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 UNITS 0.01 IPOK = 1mA VPOK = 5.5V SELA/B Input Resistance (MAX38904A Only) Thermal Shutdown Threshold CONDITIONS VEN from 1.7V to 5.5V 800 TJ rising 165 TJ falling 150 pF mA ºC 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. 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.maximintegrated.com Maxim Integrated | 5 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP Typical Operating Characteristics (MAX38904BATD+, VIN = 3.6V, VOUT = 2.5V, CBYP = 47nF, CIN = 22μF, COUT = 22μF, TA = 25ºC, unless otherwise noted) www.maximintegrated.com Maxim Integrated | 6 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP Pin Configurations MAX38904A 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 3mm 14-TDFN TOP VIEW www.maximintegrated.com Maxim Integrated | 7 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP MAX38904B 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 3mm 14-TDFN TOP VIEW MAX38904C 1 2 3 4 5 A IN IN IN IN EN B GND GND GND GND FB C OUT OUT OUT OUT BYP 3 x 5 BUMP 0.4mm PITCH WLP TOP VIEW www.maximintegrated.com Maxim Integrated | 8 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP MAX38904D 1 2 3 4 5 A IN IN IN IN EN B GND GND GND GND OUTS C OUT OUT OUT OUT BYP 3 x 5 BUMP 0.4mm PITCH WLP TOP VIEW Pin Description PIN NAME FUNCTION A1, A2, A3, A4 IN Regulator Supply Input. Connect to a voltage between 1.7V and 5.5V and bypass with a 22µF capacitor from IN to GND. B1, B2, B3, B4 GND MAX3890 4A MAX3890 4B MAX3890 4C MAX3890 4D 1, 2, 3, 4 1, 2, 3, 4 A1, A2, A3, A4 5 5 B1, B2, B3, B4 6 6 A5 A5 EN 7 — — — SELA — 7 — — GS Regulator Ground. Bring IN and OUT bypass capacitor GND connections to this pin for best performance. 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. Output Select Input. Connect to GND, IN, or Hi-Z to select one of three states. The state of the SELA and SELB pins are read when the device is enabled and used to select one of nine output voltages. Ground Sense. Connect GS to GND. 8 — — — SELB Output Select Input. Connect to GND, IN, or Hi-Z to select one of three states. The state of the SELA and SELB pins are read when the device is enabled and used to select one of nine output voltages. — 8 — — POK Active-High Power-OK Output. Connect a pullup 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 — — B5 OUTS www.maximintegrated.com Output Voltage Sense Input. Connect to the load at a point where accurate regulation is required to eliminate resistive metal drops. Maxim Integrated | 9 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP Pin Description (continued) PIN MAX3890 4A MAX3890 4B MAX3890 4C MAX3890 4D NAME — 9 B5 — FB 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 + R2/R1). 10 10 C5 C5 BYP Bypass Capacitor Input. Connect a 0.001μF to 0.1µF capacitor between OUT and BYP to reduce output noise and set the regulator soft-start rate. 11, 12, 13, 14 11, 12, 13, 14 C1, C2, C3, C4 C1, C2, C3, C4 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. www.maximintegrated.com FUNCTION Maxim Integrated | 10 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP Simplified Functional Diagram EN IN CURRENT LIMIT THERMAL PROTECTION REVERSECURRENT PROTECTION CONTROL OUT BYP BYP REF 0.6V MAX38904B ONLY EA MAX38904A MAX MAX38904B 38904B MAX MAX38904C 38904C MAX MAX38904D 38904D POK 0.54V MAX38904B/C ONLY MAX38904A ONLY MAX38904A/D ONLY FB OUTS SELA VOLTAGE SELECT SELB www.maximintegrated.com GND Maxim Integrated | 11 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP Detailed Description The MAX38904 is a high-performance PMOS linear regulator that is optimized for low noise, high input supply rejection, low dropout voltage, and small solution size. It 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 in-rush current at the input. SELA and SELB inputs are provided on A version for selecting one of nine output voltages and a power-OK output is provided on the B version for system power-up sequencing. Enable (EN) The MAX38904 includes 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: Startup Slew Rate = 5V ms 10nF 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 MAX38904 is 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 MAX38904 is 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 MAX38904 includes a reverse-voltage detector that trips when IN drops 10mV below OUT shutting off the regulator and opening the PMOS body diode connection preventing any reverse current. www.maximintegrated.com Maxim Integrated | 12 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP Output Voltage Configuration (MAX38904A) The MAX38904A has two configuration pins, SELA and SELB, that are read during power-up to determine the output regulation voltage. Table 1. MAX38904A Output Configuration Table VOUT (V) SELA SELB 1.2 Hi-Z IN 1.5 IN Hi-Z 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 (MAX38904B/C) The MAX38904B and MAX38904C use external feedback resistors to set the output regulation voltage as shown in the Typical Operating Circuit. The output voltage can be set form 0.6V to 5.0V. Set the lower feedback resistor R1 to 300kΩ or less to minimize FB input bias current error. Then, calculate the value of the upper feedback resistor R2 as follows: R2 = VOUT R1 x ( V FB − 1) where VFB is the feedback regulation voltage of 0.6V. To set the output to 2.4V, for example, R2 should be: R2 = 2.4V 300kΩ x ( 0.6V www.maximintegrated.com − 1) = 900kΩ Maxim Integrated | 13 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP Output Voltage Configuration (MAX38904D) The MAX38904D output voltage comes preprogrammed to values listed below. Additionally, any output voltage between 0.7V and 5.0V in 50mV steps can be factory programmed and special ordered. Contact a Maxim Integrated representative to order preprogrammed parts. Table 2. MAX38904D Output Configuration Table PART NUMBER VOUT (V) MAX38904DANL12 1.2 MAX38904DANL15 1.5 MAX38904DANL18 1.8 MAX38904DANL20 2.0 MAX38904DANL25 2.5 MAX38904DANL27 2.7 MAX38904DANL30 3.0 MAX38904DANL33 3.3 MAX38904DANL36 3.6 MAX38904DANL50 5.0 MAX38904DANL__ * * For other preprogrammed voltage selections, contact a Maxim Integrated representative. Power-OK (MAX38904B) The MAX38904B includes an additional open-drain output, POK, that goes high to indicate the output voltage is in regulation. Connect a pullup 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 MAX38904 is packaged in a 14-pin 3mm x 3mm 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.maximintegrated.com Maxim Integrated | 14 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP Typical Application Circuits IN (1.7V TO 5.5V) IN OUT 1.2V–5.0V OUT C1 22µF C2 47nF GND C3 22µF BYP MAX38904A TDFN ENABLE EN OUTS SELB VOUT SELECT: TO GND, IN OR FLOAT SELA IN (1.7V TO 5.5V) EP IN OUT GND BYP C1 22µF C2 47nF C3 22µF MAX38904B R3 TDFN ENABLE OUT ADJUSTABLE (0.6V–5.0V) 100k EN RESETB POK R2 GS FB EP R1 IN (1.7V TO 5.5V) IN MAX38904C C1 22µF GND OUT ADJUSTABLE (0.6V–5.0V) OUT WLP C2 47nF C3 22µF BYP R2 ENABLE EN FB R1 IN (1.7V TO 5.5V) IN MAX38904D C1 22µF GND ENABLE www.maximintegrated.com OUT EN WLP C2 47nF C3 22µF OUT FACTORY PROGRAMMED BYP OUTS Maxim Integrated | 15 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP Ordering Information PART NUMBER TEMP RANGE PIN-PACKAGE FEATURES MAX38904AATD+ -40°C to +125°C 14-pin, 3mm x 3mm, TDFN Pin-Selectable Output Voltage, Enable MAX38904BATD+ -40°C to +125°C 14-pin, 3mm x 3mm, TDFN External Resistor Feedback, POK Output with Delay, Enable MAX38904CANL+* -40°C to +125°C 15-pin, 5 x 3, 0.4mm pitch, WLP External Resistor Feedback, Enable MAX38904DANL__+* -40°C to +125°C 15-pin, 5 x 3, 0.4mm pitch, WLP Preprogrammed Output Voltage, Enable MAX38904DANL15+* -40°C to +125°C 15-pin, 5 x 3, 0.4mm pitch, WLP Factory Programmed to 1.5V, Enable #Denotes a RoHS-compliant device that may include lead(Pb) that is exempt under the RoHS requirements. T = Tape-and-reel. *Future product—contact factory for availability. www.maximintegrated.com Maxim Integrated | 16 MAX38904A/B/C/D 1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP Revision History REVISION NUMBER REVISION DATE 0 11/18 Initial release 1 12/18 Updated title of data sheet and Ordering Information 1–16 2 3/19 Updated Table 2 and Ordering Information 14, 16 DESCRIPTION PAGES CHANGED — For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html. 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. © 2018 Maxim Integrated Products, Inc.