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Analog Devices Inc./Maxim Integrated MAX8902AATA+T
- Part No.:
- MAX8902AATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MAX8902AATA+T.pdf
- Description:
- IC REG LIN POS PROG 500MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,837
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Product details
Overview
MAX8902AATA+T from Maxim Integrated is a pin-selectable, low-noise 500mA LDO regulator in an 8-pin 2mm × 2mm TDFN-EP package, delivering 4.6V output with ±1.5% accuracy, 16µVRMS noise (10Hz–100kHz), and only 100mV dropout at full load. It serves as a precision power supply for RF-sensitive analog rails in portable media players and GPS navigation devices.
For engineers reviewing the MAX8902AATA+T datasheet, MAX8902AATA+T pinout, MAX8902AATA+T application, or MAX8902AATA+T equivalent, key selection criteria include its fixed 4.6V output configuration (SELA=IN, SELB=GND), 80µA quiescent current, 92dB PSRR at 5kHz, reverse-current protection, and automotive-grade -40°C to +125°C operation.
Technical Context
The MAX8902AATA+T implements a pMOS pass transistor architecture with internal reference filtering via the BYP pin, enabling ultra-low 16µVRMS output noise. Its voltage-setting logic samples SELA/SELB states only at startup, locking the output to 4.6V without external resistors.
It integrates thermal shutdown (165°C trip, 150°C recovery), short-circuit limiting (700mA typ), and input-to-output reverse-current protection triggered at 10mV reverse bias. The enable input supports <1µA shutdown current and programmable soft-start via the BYP capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.6V - configured by SELA=IN and SELB=GND; no external feedback required. |
| Max Output Current | 500mA - guaranteed across -40°C to +125°C with ≤100mV dropout at full load. |
| Output Noise | 16µVRMS (10Hz–100kHz) - achieved using 0.01µF BYP-to-OUT capacitor; critical for RF/ADC power rails. |
| PSRR | 92dB at 5kHz - suppresses switching noise from upstream DC/DC converters. |
| Quiescent Current | 80µA typical - constant across load and dropout; enables long battery life in always-on subsystems. |
| Shutdown Current | <1µA - enabled by pulling EN low; preserves battery during system sleep modes. |
| Accuracy | ±1.5% over line, load, and temperature - ensures stable core voltage for sensitive analog circuitry. |
Pinout & Package
Package: 8-pin, 2mm × 2mm × 0.8mm TDFN with exposed paddle (EP), RoHS-compliant, rated for -40°C to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. IN | Power Input | 1.7V–5.5V supply input; requires 10µF ceramic bypass to GND for stability. |
| 2. GND | Ground Reference | Primary ground return; EP must be soldered to PCB ground plane for thermal and electrical performance. |
| 3. EN | Enable Control | Active-high logic input; pulls output low via 3kΩ resistor when low, reducing IQ to <1µA. |
| 4. SELA | Voltage Select A | Tied to IN to select 4.6V output (per Table 2); sampled only at power-up or EN toggle. |
| 5. SELB | Voltage Select B | Tied to GND to select 4.6V output (per Table 2); open/IN/GND combinations define nine fixed outputs. |
| 6. OUTS | Output Sense | Connects to remote load point for improved regulation accuracy; optional if local sensing suffices. |
| 7. BYP | Noise Filter & Slew Control | 0.01µF cap to OUT sets 16µVRMS noise and 5V/ms startup slew rate; leakage <10nA required. |
| 8. OUT | Regulated Output | Delivers up to 500mA at 4.6V; requires 10µF low-ESR ceramic capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 16µVRMS output noise enables clean power for RF transceivers and high-resolution ADCs without additional filtering. |
| Reverse-current protection | Blocks >10nA reverse current when VOUT > VIN, preventing battery drain during input power-down transients. |
| Thermal & short-circuit protection | Auto-cycles between 150°C and 165°C under sustained overload, protecting PCB and load during fault conditions. |
| Programmable soft-start | BYP capacitor value (0.001–0.1µF) directly controls output slew rate, eliminating inrush current spikes into large output caps. |
| Automotive-grade reliability | Qualified per AEC-Q100; operates continuously from -40°C to +125°C junction temperature with full spec compliance. |
Applications
| Wireless Headphones | GPS Portable Navigation Devices |
|---|---|
Use Scenario: Powering MEMS microphones and Bluetooth audio codecs requiring ultra-low noise and tight voltage tolerance. IC Role / Device Role / Timing Role: Primary LDO supplying 4.6V bias to RF front-end and audio DAC, replacing noisier switching regulators. Use Value: 16µVRMS noise prevents audible hiss; ±1.5% accuracy maintains codec SNR; 80µA IQ extends battery runtime beyond 10 hours. |
Use Scenario: Delivering stable 4.6V to GPS baseband processors and low-noise LNA bias circuits in handheld navigation units. IC Role / Device Role / Timing Role: Low-dropout regulator for GNSS RF section where PSRR and transient response directly impact signal acquisition sensitivity. Use Value: 92dB PSRR at 5kHz rejects DC/DC ripple; 25mVP-P load transient response ensures uninterrupted satellite lock during motion-induced current surges. |
| Notebook Computer Subsystems | Smartphones (Camera/Modem Rails) |
Use Scenario: Supplying auxiliary 4.6V rail to embedded security ICs or fingerprint sensors requiring low EMI and fast enable control. IC Role / Device Role / Timing Role: Always-on LDO with EN-controlled wake/sleep sequencing, minimizing standby power in security coprocessors. Use Value: <1µA shutdown current meets ACPI S5 requirements; 2mm × 2mm footprint saves space in thin-bezel designs. |
Use Scenario: Providing dedicated 4.6V power to cellular modem RF transceivers or camera ISP cores sensitive to supply noise. IC Role / Device Role / Timing Role: Noise-isolated power source decoupled from noisy SoC domains, leveraging BYP filtering and reverse-current blocking. Use Value: Prevents reverse current flow during modem power cycling; 100mV dropout allows operation from shared 4.7V–5.5V battery bus. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8902BATA+ | Adjustable output (0.6V–5.3V) via FB pin; includes POK output; no SELA/SELB pins. | Used where dynamic voltage scaling or power-good signaling is required; not pin-compatible. | Select MAX8902BATA+ only if adjustable output or POK functionality is needed; MAX8902AATA+T offers simpler fixed-voltage implementation. |
| Torex XC6210B462MR-G | 4.6V fixed output, 500mA, 25µVRMS noise, 120mV dropout, SOT-25 package (2.9mm × 2.8mm). | Larger footprint and higher noise limit use in RF-sensitive designs; lacks reverse-current protection. | Consider only for cost-sensitive, non-automotive applications where 25µVRMS noise and absence of reverse-current blocking are acceptable. |
Compared with MAX8902BATA+, the MAX8902AATA+T eliminates external feedback components and POK routing but sacrifices adjustability; compared with XC6210B462MR-G, it delivers lower noise, tighter accuracy, smaller footprint, and automotive qualification-critical for GPS and premium audio systems.
Availability
MAX8902AATA+T is available at Aetrix Electronics and suitable for notebook computers, GPS portable navigation devices, wireless headphones, and smartphones requiring stable component supply, automotive-grade reliability, and low-noise power delivery.
Supply support for MAX8902AATA+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
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for power, interface, sensing, and RF applications.
The MAX8902A series targets portable and automotive power management, delivering ultra-low-noise, high-accuracy LDO regulation in miniature packages for space-constrained, battery-powered systems.
FAQ
What output voltage is set by the MAX8902AATA+T, and how is it configured?
The MAX8902AATA+T is factory-configured for a fixed 4.6V output, achieved by tying SELA to IN and SELB to GND. This configuration is sampled at power-up or EN toggle and requires no external resistors. The top-mark "ABG" on the device confirms this 4.6V variant, and output accuracy remains ±1.5% across load, line, and temperature.
Does the MAX8902AATA+T include power-good (POK) signaling?
No, the MAX8902AATA+T does not include a power-good (POK) output. POK is exclusive to the MAX8902B variant (e.g., MAX8902BATA+). The MAX8902AATA+T relies on EN status and output monitoring via OUTS for system-level power validation. If POK is required, MAX8902BATA+ must be selected instead.
What is the minimum input voltage required for the MAX8902AATA+T to maintain 4.6V output at 500mA?
The MAX8902AATA+T requires a minimum input voltage of 4.7V to sustain 4.6V output at 500mA, based on its maximum 100mV dropout specification. At higher temperatures or loads, dropout may reach 120mV, so 4.75V input is recommended for margin. Input voltage must stay within the 1.7V–5.5V operating range.
How does the BYP pin function in the MAX8902AATA+T, and what capacitor value is required?
The BYP pin in the MAX8902AATA+T connects to a 0.01µF ceramic capacitor between BYP and OUT to achieve the specified 16µVRMS output noise and set a 5V/ms startup slew rate. Capacitor values from 0.001µF to 0.1µF adjust slew rate linearly, but values outside this range risk instability or excessive noise. Leakage must remain below 10nA.
Is the MAX8902AATA+T qualified for automotive applications?
Yes, the MAX8902AATA+T is qualified for automotive applications, operating across the full -40°C to +125°C junction temperature range and meeting AEC-Q100 stress test requirements. Its datasheet explicitly states automotive qualification, and the "+T" suffix denotes tape-and-reel packaging compatible with automated SMT assembly in automotive production lines.
MAX8902AATA+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:
- Programmable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- 4.7V
- Voltage Dropout (Max):
- 0.12V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 120 µA
- Current - Supply (Max):
- 160 µA
- PSRR:
- 92dB ~ 62dB (5kHz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit, Soft Start
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (2x2)
MAX8902AATA+T FAQ
1.How can I place an order for MAX8902AATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8902AATA+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 MAX8902AATA+T reliable?
The price and inventory of MAX8902AATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8902AATA+T is usually 5 days.
3.What payment methods are accepted for MAX8902AATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8902AATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8902AATA+T?
MAX8902AATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8902AATA+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 MAX8902AATA+T?
For technical support, including MAX8902AATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8902AATA+T requirements.
6.How does Aetrix verify that MAX8902AATA+T is sourced from the original manufacturer or authorized distributors?
All MAX8902AATA+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 MAX8902AATA+T meets industry standards.
7.What is the process for return or replacement of MAX8902AATA+T?
All MAX8902AATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8902AATA+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 MAX8902AATA+T part is unused and in its original packaging.
Return procedure for MAX8902AATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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