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Analog Devices Inc./Maxim Integrated MAX25300AATA/V+
- Part No.:
- MAX25300AATA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MAX25300AATA/V+.pdf
- Description:
- IC REG LIN POS ADJ 500MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,368
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Product details
Overview
MAX25300AATA/V+ from Analog Devices is a low-noise, automotive-grade linear regulator delivering up to 500mA output current with 12µVRMS noise (10Hz–100kHz), ±1% DC accuracy over load/line/temperature, and only 100mV dropout at full load (3.6VIN). It features pin-selectable output voltages (1.2V–5.0V), AEC-Q100 qualification, and operates from −40°C to +125°C in a 2mm × 2mm TDFN package - deployed in high-fidelity automotive audio and precision data acquisition systems.
For engineers reviewing the MAX25300AATA/V+ datasheet, MAX25300AATA/V+ pinout, MAX25300AATA/V+ application, or MAX25300AATA/V+ equivalent, key selection criteria include its 12µVRMS noise floor, 70dB PSRR at 10kHz, 365µA no-load quiescent current, programmable soft-start via BYP capacitor, and integrated reverse-current protection - all critical for noise-sensitive analog signal chains and automotive power domains requiring stable, low-ripple biasing.
Technical Context
The MAX25300AATA/V+ implements a pMOS pass transistor architecture with internal 0.6V reference and voltage-select logic that samples SELA/SELB states at enable startup to configure one of nine fixed output voltages. Its feedback path includes a dedicated BYP pin for noise filtering and slew-rate control, decoupling reference stability from output transient response.
It integrates thermal shutdown (trip at +165°C, hysteresis to +150°C), current limiting (~700mA typ), and reverse-input-current protection triggered when VIN falls 10mV below VOUT. The device maintains regulation across 1.7V–5.5V input while sustaining ±1% accuracy without external compensation, relying solely on ≥2µF ceramic output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 500mA max - supports demanding analog loads like ADC reference buffers or RF front-end biasing without derating. |
| Output Noise | 12µVRMS (10Hz–100kHz) - enables high-resolution SAR and delta-sigma ADCs by minimizing RMS noise contribution to signal chain SNR. |
| PSRR | 70dB at 10kHz - suppresses switching noise from upstream DC/DC converters in mixed-power-supply automotive ECUs. |
| Dropout Voltage | 100mV max at 500mA (3.6VIN) - allows operation with minimal headroom, extending battery runtime in 3.3V/5V rail systems. |
| Quiescent Current | 365µA typical, independent of dropout - ensures ultra-low standby power in always-on automotive modules (e.g., CAN wake-up receivers). |
| Accuracy | ±1% over load, line, and temperature (−40°C to +125°C) - eliminates need for post-regulation trimming in production calibration. |
| Input Range | 1.7V to 5.5V - compatible with Li-ion, 3.3V, and 5V supply domains without external pre-regulation. |
Pinout & Package
Package: 8-pin, 2mm × 2mm TDFN with exposed pad (EP), RoHS-compliant and automotive-qualified (AEC-Q100).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input supply rail | Accepts 1.7V–5.5V; requires 4.7µF ceramic bypass to GND for stability and EMI suppression. |
| 2 GND | Power ground reference | Low-impedance return path for IN/OUT capacitors; must connect directly to PCB ground plane under EP. |
| 3 EN | Enable control input | Active-high logic interface (0.8V–1.2V threshold); tie to IN for always-on operation in automotive battery domains. |
| 4 SELA | Output voltage select A | Configures one of nine VOUT options (e.g., 1.5V when pulled to IN); sampled once at EN assertion. |
| 5 SELB | Output voltage select B | Paired with SELA to set VOUT (e.g., 3.3V when pulled to GND); open/IN/GND states define discrete voltage mapping per Table 1. |
| 6 OUTS | Output voltage sense | Remote sensing point to compensate for PCB trace IR drop - improves regulation accuracy at remote loads. |
| 7 BYP | Bypass/soft-start node | Connects 0.001–0.1µF capacitor to OUT to filter reference noise and set startup slew rate (e.g., 5V/ms with 0.01µF). |
| 8 OUT | Regulated output | Delivers up to 500mA; requires ≥2µF X5R/X7R ceramic capacitor to GND for stability and transient response. |
| EP | Exposed thermal pad | Must be soldered to solid ground plane with ≥4 thermal vias - primary heat dissipation path (θJA = 102°C/W on 4-layer board). |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 12µVRMS (10Hz–100kHz) achieved via dedicated BYP-filtered reference and pMOS architecture - preserves SNR in audio DACs and sensor front-ends. |
| Pin-selectable outputs | Nine factory-configurable voltages (1.2V–5.0V) set by SELA/SELB logic states - eliminates external resistors and reduces BOM count in multi-rail designs. |
| Automotive qualification | AEC-Q100 Grade 0 (−40°C to +125°C) and 100% tested for automotive reliability - qualified for engine control, ADAS camera modules, and infotainment subsystems. |
| Reverse-current protection | Automatic shutdown when VIN < VOUT − 10mV - prevents battery drain during cold-cranking or partial system power-down in 12V architectures. |
| Programmable soft-start | Slew rate controlled by BYP capacitor value (StartupSlewRate = 5V/ms × 0.01µF/CBYP) - avoids inrush current into large output caps and prevents upstream supply sag. |
Applications
| Automotive Audio Amplifiers | High-Resolution Data Acquisition |
|---|---|
|
Use Scenario: Powering Class-D amplifier bias rails and DAC reference supplies in vehicle infotainment head units. IC Role / Device Role / Timing Role: Low-noise LDO providing clean 3.3V/5.0V rails isolated from noisy 12V battery and DC/DC converter switching artifacts. Use Value: 12µVRMS noise and 70dB PSRR at 10kHz prevent audible hiss and distortion, enabling >110dB THD+N performance in premium audio systems. |
Use Scenario: Supplying precision ADCs (e.g., 24-bit delta-sigma) and sensor signal conditioners in battery management or chassis control units. IC Role / Device Role / Timing Role: Stable, low-drift voltage source for reference buffers and analog front-ends where supply ripple directly modulates conversion accuracy. Use Value: ±1% DC accuracy over temperature and 100mV dropout ensure consistent LSB weighting across operating conditions - eliminating recalibration in field-deployed systems. |
| ADAS Camera Modules | Automotive Infotainment Processors |
|
Use Scenario: Regulating power for high-speed image sensors and ISP cores in surround-view or driver-monitoring cameras. IC Role / Device Role / Timing Role: Primary 1.8V/2.5V core supply with fast transient response to handle burst-mode pixel readout current spikes. Use Value: 500mA output capability and 50mV load transient response (50mA→500mA) prevent image corruption during dynamic scene capture. |
Use Scenario: Generating auxiliary rails (e.g., 1.2V, 1.5V) for SoC I/O, DDR memory, and display interfaces in digital cockpits. IC Role / Device Role / Timing Role: Secondary LDO supporting multiple voltage domains with pin-select flexibility and AEC-Q100 assurance. Use Value: Nine selectable outputs reduce design variants and inventory SKUs - accelerating platform reuse across instrument cluster, navigation, and HUD product lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A9101DSKT | Lower 4.5µVRMS noise (10Hz–100kHz), but only 200mA output and no AEC-Q100 rating; requires external soft-start capacitor. | Targeted at industrial test equipment, not automotive environments; lacks reverse-current protection and POK functionality. | Select when ultra-low noise dominates over automotive qualification and higher current capability. |
| NCP163AMX330TBG | 330mV dropout at 250mA, 15µVRMS noise, AEC-Q100 qualified, but limited to 3.3V fixed output and no pin-select flexibility. | Suitable for cost-sensitive entry-level automotive modules where single-voltage operation suffices and 500mA headroom is unnecessary. | Choose for simplified BOM in non-critical 3.3V-only applications where MAX25300AATA/V+'s nine-voltage flexibility is unused. |
Compared with TPS7A9101DSKT and NCP163AMX330TBG, the MAX25300AATA/V+ uniquely balances automotive qualification, 500mA drive, nine pin-selectable outputs, and 12µVRMS noise - making it optimal for multi-rail, safety-aware systems where layout space, thermal performance, and supply-chain continuity are constrained.
Availability
MAX25300AATA/V+ is available at Aetrix Electronics and suitable for automotive electronics, high-resolution data acquisition systems, and audio systems requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for MAX25300AATA/V+ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.
The MAX25300AATA/V+ belongs to Analog Devices' automotive-qualified LDO family, designed specifically for noise-sensitive power domains in ADAS, infotainment, and body electronics - emphasizing low noise, high accuracy, and robust protection under harsh automotive conditions.
FAQ
What output voltages does the MAX25300AATA/V+ support?
The MAX25300AATA/V+ supports nine pin-selectable output voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 4.0V, and 5.0V. These are configured using combinations of SELA and SELB pin states (GND, IN, or open) sampled at enable startup. The MAX25300AATA/V+ does not support resistor-adjustable outputs - that functionality is exclusive to the MAX25300B variant.
Is the MAX25300AATA/V+ qualified for automotive use?
Yes, the MAX25300AATA/V+ is AEC-Q100 qualified (Grade 0) and rated for operation from −40°C to +125°C ambient temperature. The "/V+" suffix explicitly denotes automotive qualification and RoHS compliance. It includes built-in protections required for automotive environments, including reverse-current detection, thermal shutdown, and robust ESD tolerance.
How does the BYP pin function in the MAX25300AATA/V+?
The BYP pin in the MAX25300AATA/V+ connects to a capacitor (0.001µF–0.1µF) between BYP and OUT to filter reference noise and control soft-start slew rate. A 0.01µF capacitor sets startup at 5V/ms; slew rate scales inversely with capacitance. This pin also serves as a low-leakage (<10nA) node - excessive leakage degrades output accuracy and must be avoided in PCB layout.
What is the minimum output capacitance required for stability with the MAX25300AATA/V+?
The MAX25300AATA/V+ requires a minimum of 2µF total effective output capacitance (including DC bias and temperature derating) for guaranteed stability. A 4.7µF X5R or X7R ceramic capacitor is recommended. The capacitor must have low ESR (<0.03Ω) and be placed close to the OUT and GND pins to maintain loop integrity and transient response.
Does the MAX25300AATA/V+ include power-good indication?
No, the MAX25300AATA/V+ does not include a power-good (POK) output. That feature is exclusive to the MAX25300B variant (e.g., MAX25300BATA/V+). The MAX25300AATA/V+ relies on external monitoring or system-level sequencing for power status verification - its pinout omits POK and FB, instead providing OUTS for remote sensing and SELA/SELB for voltage selection.
MAX25300AATA/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.3V
- Voltage Dropout (Max):
- 0.3V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 600 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB ~ 40dB (1kHz ~ 1MHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Current
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (2x2)
MAX25300AATA/V+ FAQ
1.How can I place an order for MAX25300AATA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25300AATA/V+ 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 MAX25300AATA/V+ reliable?
The price and inventory of MAX25300AATA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX25300AATA/V+ is usually 5 days.
3.What payment methods are accepted for MAX25300AATA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25300AATA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25300AATA/V+?
MAX25300AATA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25300AATA/V+ 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 MAX25300AATA/V+?
For technical support, including MAX25300AATA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25300AATA/V+ requirements.
6.How does Aetrix verify that MAX25300AATA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX25300AATA/V+ 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 MAX25300AATA/V+ meets industry standards.
7.What is the process for return or replacement of MAX25300AATA/V+?
All MAX25300AATA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX25300AATA/V+, 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 MAX25300AATA/V+ part is unused and in its original packaging.
Return procedure for MAX25300AATA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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