My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX38902EATA+T
- Part No.:
- MAX38902EATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MAX38902EATA+T.pdf
- Description:
- IC REG LIN POS ADJ 500MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,597
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX38902EATA+T from Analog Devices is a low-noise, 500mA LDO linear regulator in an 8-pin TDFN package, delivering ±1% DC output accuracy over load/line/temperature, 14µVRMS output noise (10Hz–100kHz), and only 100mV dropout at full load with 3.6V input - ideal for powering high-resolution ADCs and precision audio circuitry.
For engineers reviewing the MAX38902EATA+T datasheet, MAX38902EATA+T pinout, MAX38902EATA+T application, or MAX38902EATA+T equivalent, key selection factors include its resistor-adjustable 0.8V–5.0V output, active discharge (800Ω), POK output, programmable soft-start via BYP capacitor, and robust thermal/current protection - all in a 2mm × 2mm footprint.
Technical Context
The MAX38902EATA+T employs a PMOS pass transistor architecture enabling ultra-low dropout and reverse-current protection triggered when IN drops 10mV below OUT. Its feedback loop uses a precision 0.6V reference and external resistor divider (FB pin) to set output voltage across 0.8V–5.0V.
It integrates a dedicated BYP pin that filters reference noise and controls soft-start slew rate (5V/ms with 0.01µF), while the POK open-drain output asserts low when VOUT reaches ≥91% of regulation - supporting reliable power sequencing in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 500mA max - supports single-supply operation for moderate-power analog subsystems without thermal derating in 4-layer PCB layouts. |
| Output Noise | 14µVRMS (10Hz–100kHz) - enables clean biasing of RF receivers and 24-bit SAR ADCs without additional filtering. |
| Dropout Voltage | 100mV max at 500mA (VIN = 3.6V) - allows efficient regulation from Li-ion or 3.3V rails into sub-3V logic/analog domains. |
| PSRR | 45dB at 100kHz - suppresses switching noise from adjacent DC/DC converters feeding sensitive analog signal chains. |
| Supply Current | 600µA typical (no-load), <0.1µA shutdown - minimizes quiescent power in always-on sensor nodes and battery-backed systems. |
| Accuracy | ±1% over load, line, and temperature (−40°C to +125°C) - eliminates need for post-regulation trimming in industrial control modules. |
| Active Discharge | 800Ω pull-down on OUT when EN = low - discharges 10µF output cap in ~8ms, enabling fast, controlled power-down sequencing. |
Pinout & Package
MAX38902EATA+T is housed in an 8-pin, 2mm × 2mm TDFN package with exposed thermal pad (EP), optimized for low θJA (102°C/W on 4-layer board) and minimal PCB area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input supply connection | Bypassed with 10µF ceramic capacitor; supports 1.7V–5.5V input range with UVLO at 1.6V (100mV hysteresis). |
| 2 GND | Power ground reference | Common return for IN and OUT bypass caps; must connect to low-impedance ground plane for noise and thermal performance. |
| 3 EN | Enable control input | Active-high logic input (0.8V–1.2V threshold); pulls OUT to GND via 800Ω when low for fast discharge. |
| 4 INS | Input sense node | Connected directly to IN; enables accurate dropout measurement and improves line regulation by sensing true input voltage. |
| 5 POK | Power-OK open-drain output | Asserts low when VOUT ≥91% of target; requires external pull-up for reset generation in FPGA/microcontroller power sequencing. |
| 6 FB | Feedback voltage input | Senses 0.6V reference point; used with external R-divider to set output from 0.8V to 5.0V (e.g., R2 = 300kΩ, R3 = 950kΩ for 2.5V). |
| 7 BYP | Bypass capacitor terminal | Connects 0.001µF–0.1µF cap to OUT; sets soft-start slew rate and reduces reference noise - leakage >10nA degrades accuracy. |
| 8 OUT | Regulated output | Supplies up to 500mA; requires ≥4µF low-ESR ceramic cap (X5R/X7R) to ensure stability and transient response. |
| EP | Exposed thermal pad | Must be soldered to solid ground plane with ≥4 thermal vias; primary path for heat dissipation (θJC = 8°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Soft-Start | Controlled via BYP capacitor value (0.001µF–0.1µF); enables precise startup slew rate tuning (e.g., 5V/ms with 0.01µF) to prevent inrush current in capacitive loads. |
| Reverse-Current Protection | Automatic shutdown when IN falls 10mV below OUT - prevents backfeed from output caps during input brownout or hot-swap events. |
| Thermal Shutdown | Activates at TJ = 165°C (hysteresis to 150°C); cycles output on/off under sustained overload to protect silicon while maintaining system visibility. |
| Low-Noise Reference Filtering | BYP pin provides dedicated low-impedance path for 0.6V reference decoupling - reduces integrated output noise to 14µVRMS without external LDO post-filtering. |
| Power-OK Monitoring | POK output signals valid regulation with 91% threshold and fast response - eliminates need for external supervisor IC in compact data acquisition modules. |
Applications
| Communication Circuitry | Audio Systems |
|---|---|
Use Scenario: Powering RF transceiver synthesizers and baseband ADC/DAC in 5G small-cell front-ends. IC Role / Device Role / Timing Role: Low-noise local LDO supplying VCO bias and ADC reference rails. Use Value: 14µVRMS noise and 45dB PSRR at 100kHz prevent phase noise degradation and spurious tones in RF signal paths. |
Use Scenario: Supplying headphone amplifiers and MEMS microphone bias in portable audio codecs. IC Role / Device Role / Timing Role: Clean, adjustable 1.8V–3.3V rail for analog signal chain components. Use Value: ±1% accuracy and <100mV dropout enable stable gain calibration and extended battery runtime in Class AB amplifier stages. |
| High-Resolution Data Acquisition | Industrial Sensor Signal Conditioning |
Use Scenario: Biasing 24-bit delta-sigma ADCs and precision op-amps in portable multimeters and DAQ modules. IC Role / Device Role / Timing Role: Primary analog supply rail with tight DC accuracy and ultra-low noise floor. Use Value: 14µVRMS noise directly translates to ≤0.8 LSB noise contribution in 24-bit systems using 5V full-scale range. |
Use Scenario: Powering isolated analog front-ends in smart pressure/temperature transmitters operating at −40°C to +125°C. IC Role / Device Role / Timing Role: High-reliability, thermally robust LDO for sensor excitation and signal conditioning ASICs. Use Value: Guaranteed ±1% accuracy over full temperature range and 125°C junction rating ensure calibration stability without software compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B332MR-G | Fixed 3.3V output, no POK or BYP pin, 300mA rating, 25µVRMS noise | Lacks programmable output, soft-start, and power-good signaling - suitable only for simple fixed-voltage rail replacement | Select when cost-sensitive, space-constrained designs require basic 3.3V regulation without sequencing or monitoring. |
| Analog Devices ADM7150ACPZ-3.3-R7 | Fixed 3.3V output, 600mA, 0.9µVRMS noise (10Hz–100kHz), no active discharge or POK | Ultra-low noise but no enable/discharge or fault reporting - targets RF/VCO supplies where sequencing is handled externally | Select when sub-1µVRMS noise is mandatory and system-level power management handles sequencing and status. |
Compared with MAX38902EATA+T, the XC6210B332MR-G offers lower BOM count for fixed 3.3V use but sacrifices adjustability and system visibility; the ADM7150ACPZ-3.3-R7 delivers superior noise performance yet lacks integrated discharge and POK - making MAX38902EATA+T the balanced choice for sequenced, monitored, and adjustable analog power rails.
Availability
MAX38902EATA+T is available at Aetrix Electronics and suitable for communication circuitry, audio systems, high-resolution data acquisition systems, industrial sensor interfaces, and automotive infotainment modules requiring stable component supply across extended temperature ranges.
Supply support for MAX38902EATA+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.
The MAX38902EATA+T belongs to Analog Devices' precision LDO family designed specifically for noise-sensitive analog and mixed-signal applications demanding high DC accuracy, ultra-low noise, and robust protection in compact packages.
FAQ
What is the minimum output capacitance required for stable operation of the MAX38902EATA+T?
The MAX38902EATA+T requires a minimum 4µF ceramic output capacitor (X5R or X7R dielectric) connected from OUT to GND to ensure stability and proper transient response. This value accounts for voltage derating and ESR effects; using less than 4µF risks oscillation or poor load step recovery. The MAX38902EATA+T datasheet specifies 10µF as typical for optimal performance, especially under dynamic load conditions.
How does the BYP pin affect startup behavior in the MAX38902EATA+T?
The BYP pin on the MAX38902EATA+T connects to a capacitor (0.001µF–0.1µF) between BYP and OUT, which sets the output voltage slew rate during startup. For example, a 0.01µF capacitor yields a 5V/ms slew rate, limiting inrush current to ~50mA when charging a 10µF output cap. This programmable soft-start prevents input rail collapse and avoids false triggering of upstream power monitors in the MAX38902EATA+T system.
Does the MAX38902EATA+T provide reverse-current protection, and how does it operate?
Yes, the MAX38902EATA+T includes reverse-current protection that activates when the input voltage (IN) drops 10mV below the output voltage (OUT). At that point, the internal PMOS pass device is shut off, opening the body diode path and preventing backflow from the output capacitor into the input rail. This feature protects upstream DC/DC converters during power-down transients and is critical in systems with large hold-up capacitance downstream of the MAX38902EATA+T.
What is the function and electrical specification of the POK pin on the MAX38902EATA+T?
The POK (Power-OK) pin on the MAX38902EATA+T is an open-drain output that goes low when the regulated output voltage reaches ≥91% of its nominal value, indicating stable regulation. It sinks up to 1mA at ≤100mV low-level voltage and requires an external pull-up resistor. During faults (overload, shutdown, or undervoltage), POK releases high - enabling direct interface with microcontroller reset inputs or FPGA configuration managers in the MAX38902EATA+T application.
Can the MAX38902EATA+T be used in automotive applications, and what temperature rating does it support?
Yes, the MAX38902EATA+T is qualified for operation from −40°C to +125°C ambient temperature and features guaranteed ±1% output accuracy across this full range - meeting AEC-Q200 stress test requirements for passive components and supporting automotive infotainment, ADAS sensor hubs, and body control modules. Its 125°C junction rating, thermal shutdown (165°C), and robust package make the MAX38902EATA+T suitable for under-hood and cabin environments with validated reliability.
MAX38902EATA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.3V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 1.5 mA
- Current - Supply (Max):
- -
- PSRR:
- 60dB ~ 40dB (1kHz ~ 1MHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (2x2)
MAX38902EATA+T FAQ
1.How can I place an order for MAX38902EATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX38902EATA+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX38902EATA+T reliable?
The price and inventory of MAX38902EATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX38902EATA+T is usually 5 days.
3.What payment methods are accepted for MAX38902EATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX38902EATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX38902EATA+T?
MAX38902EATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX38902EATA+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX38902EATA+T?
For technical support, including MAX38902EATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX38902EATA+T requirements.
6.How does Aetrix verify that MAX38902EATA+T is sourced from the original manufacturer or authorized distributors?
All MAX38902EATA+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX38902EATA+T meets industry standards.
7.What is the process for return or replacement of MAX38902EATA+T?
All MAX38902EATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX38902EATA+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX38902EATA+T part is unused and in its original packaging.
Return procedure for MAX38902EATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX38902EATA+T Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
