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Analog Devices Inc./Maxim Integrated MAX8531ETTA8-T
- Part No.:
- MAX8531ETTA8-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX8531ETTA8-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX8531ETTA8-T from Maxim Integrated is a dual low-dropout linear regulator IC with integrated low-noise reference bypass (BP) pin, delivering 200mA on OUT1 and 150mA on OUT2 from a 2.5V–6.5V input. It features 100mV typical dropout at 100mA, 40µVRMS output noise (with 10nF BP capacitor), and 130µA quiescent current - optimized for space-constrained, battery-powered portable electronics requiring clean, stable dual-rail power.
For engineers reviewing the MAX8531ETTA8-T datasheet, MAX8531ETTA8-T pinout, MAX8531ETTA8-T application, or MAX8531ETTA8-T equivalent, this page delivers verified specifications, QFN-6 package layout, real-world use cases in handheld instruments and wireless LAN cards, and two validated alternative parts with documented functional and application differences.
Technical Context
The MAX8531ETTA8-T integrates two independent P-channel MOSFET LDOs with internal 1.25V bandgap reference and error amplifiers. Each regulator uses an internal resistor divider to set output voltage (1.5V–3.3V in 50mV steps); the BP pin enables a 10nF external capacitor to form a low-pass filter that reduces output noise to 40µVRMS (10Hz–100kHz).
It includes thermal-shutdown protection (160°C trip, 10°C hysteresis), short-circuit and output current limiting (210mA min for OUT1, 165mA min for OUT2), and logic-controlled shutdown (SHDN) with <1µA off-state current. Unlike the MAX8530, it omits the reset circuit and instead provides the BP function for ultra-low-noise operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6.5V - supports single-cell Li-ion (3.0–4.2V), 3.3V/5V rails, and wide-input battery systems without pre-regulation. |
| OUT1 Output Current | Guaranteed 200mA - sufficient for powering baseband processors or RF front-end bias in compact wireless modules. |
| OUT2 Output Current | Guaranteed 150mA - suitable for auxiliary I/O supplies or sensor interface rails in portable instrumentation. |
| Dropout Voltage | 100mV (typ) at 100mA load - enables >95% efficiency at light-to-moderate loads and extends usable battery life near end-of-discharge. |
| Output Noise | 40µVRMS (10Hz–100kHz, with 10nF BP cap) - meets stringent analog supply requirements for ADCs, PLLs, or RF synthesizers. |
| Quiescent Current | 130µA (both LDOs active) - ensures minimal standby drain in always-on subsystems like Bluetooth LE receivers. |
| Shutdown Current | <1µA - enables deep-sleep modes in energy-harvesting or IoT edge nodes without external disconnect switches. |
Pinout & Package
MAX8531ETTA8-T is housed in a 3mm × 3mm, 0.8mm height, 6-pin thin QFN package with exposed thermal pad (JEDEC MO-229 WEEA, pkg code T633-2). The exposed pad must be soldered to a PCB ground plane for optimal thermal performance and EMI suppression.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT2 | Regulator 2 output terminal; delivers up to 150mA with ±3% accuracy over temperature and load. |
| 2 | IN | Main input supply connection; accepts 2.5V–6.5V; requires ≥2.2µF ceramic input capacitor for stability. |
| 3 | OUT1 | Regulator 1 output terminal; delivers up to 200mA with ±3% accuracy; primary rail for core logic or VCORE. |
| 4 | GND | Power and signal ground; also serves as thermal conduction path via exposed pad - must be connected to large copper area. |
| 5 | SHDN | Active-high shutdown control; drives both LDOs into ultra-low-power state when pulled low (<0.4V). |
| 6 | BP | Bypass pin for low-noise reference; connects to 10nF ceramic capacitor to reduce output noise by filtering reference ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 40µVRMS (10Hz–100kHz) enabled by dedicated BP pin and 10nF capacitor - eliminates need for post-LDO LC filters in noise-sensitive analog chains. |
| P-channel pass transistor | 1Ω RDS(ON) design enables dropout proportional to load - achieves 100mV at 100mA while maintaining sub-200mV dropout even at full rated current. |
| Thermal & short-circuit protection | 160°C thermal shutdown with 10°C hysteresis and indefinite short-circuit tolerance - allows safe operation in unattended embedded systems without external foldback circuitry. |
| Low-quiescent-current operation | 130µA total supply current independent of load or dropout - preserves battery runtime in always-on monitoring applications such as wearable health sensors. |
| Small-footprint packaging | 3mm × 3mm QFN-6 with exposed pad - saves >60% board area vs. SOIC-8 alternatives while enabling efficient thermal transfer in stacked PCB designs. |
Applications
| Wireless LAN Cards | Digital Cameras |
|---|---|
|
Use Scenario: Powering 2.85V RF transceiver and 1.8V image sensor interface in mini-PCIe WLAN modules. IC Role / Device Role / Timing Role: Dual-rail LDO providing isolated, low-noise supplies with fast transient response to handle burst TX/RX current demands. Use Value: 40µVRMS noise prevents spurious emissions in 2.4GHz/5GHz bands; 100mV dropout extends operational time during battery sag. |
Use Scenario: Supplying 3.0V CCD driver and 1.5V digital core in compact point-and-shoot camera modules. IC Role / Device Role / Timing Role: Dual-output regulator delivering tightly regulated, sequenced power rails with simultaneous enable via SHDN. Use Value: ±3% output accuracy ensures consistent exposure timing and color fidelity; 130µA quiescent current minimizes standby drain between shots. |
| Hand-Held Instruments | PCMCIA Cards |
|
Use Scenario: Generating 2.5V analog front-end and 3.3V microcontroller supply in portable multimeters and oscilloscopes. IC Role / Device Role / Timing Role: Low-noise dual LDO replacing discrete regulators and ferrite-bead filters to meet EN 61326 EMC limits. Use Value: BP pin + 10nF capacitor eliminates 10kHz–100kHz switching artifacts that would corrupt µV-level measurements. |
Use Scenario: Providing 3.3V card interface and 1.8V FPGA configuration voltage in legacy PCMCIA data acquisition cards. IC Role / Device Role / Timing Role: Compact dual LDO enabling hot-swap compliance and inrush current limiting via controlled startup sequence. Use Value: Thermal shutdown and current limit protect against connector arcing or misinsertion; 3mm × 3mm footprint fits tight card-edge layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8529ETT+T | Single-output, 300mA LDO with same 40µVRMS noise and BP pin; no second output. | Suitable only where one regulated rail is needed; lacks OUT2 for auxiliary power domains. | Select when system requires higher current on a single rail and can derive secondary voltage via DC-DC or resistive divider. |
| TPL7407LDR | 7-channel high-side driver with integrated 3.3V LDO (150mA), but no BP pin or ultra-low-noise capability. | Designed for LED/display driver integration, not precision analog supply; PSRR = 55dB @ 100Hz vs. 62dB for MAX8531. | Choose only if driving high-current loads is primary requirement and noise sensitivity is secondary. |
Compared with MAX8531ETTA8-T, MAX8529ETT+T offers higher single-rail current but no dual-output flexibility, while TPL7407LDR trades noise performance and rail independence for integrated driver functionality - making MAX8531ETTA8-T the only choice for compact, dual-rail, low-noise portable power.
Availability
MAX8531ETTA8-T is available at Aetrix Electronics and suitable for wireless LAN cards, digital cameras, hand-held instruments, and PCMCIA cards requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX8531ETTA8-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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX8530/MAX8531 product line was designed specifically for ultra-compact, battery-powered portable electronics needing dual, low-noise, low-quiescent-current regulation in sub-3mm packages - targeting cellular phones, PDAs, and handheld test equipment.
FAQ
What is the output voltage range supported by MAX8531ETTA8-T?
The MAX8531ETTA8-T supports factory-set output voltages from 1.5V to 3.3V in 50mV increments for both OUT1 and OUT2. Specific configurations are encoded in the top-mark (e.g., "A8" denotes VOUT1 = 2.85V, VOUT2 = 2.85V per Output Voltage Selector Guide). Custom voltages require contacting Maxim for special ordering.
Does MAX8531ETTA8-T include a reset output function?
No, MAX8531ETTA8-T does not include a reset output. That feature is exclusive to the MAX8530 family (e.g., MAX8530ETTA8-T). The MAX8531ETTA8-T replaces the RESET pin with the BP (bypass) pin to enable ultra-low-noise operation - confirmed in Pin Description, Functional Diagram, and General Description sections of the datasheet.
What capacitor is required on the BP pin of MAX8531ETTA8-T?
A 10nF ceramic capacitor must be placed between the BP pin and GND to achieve the specified 40µVRMS output noise. This forms a low-pass filter with an internal resistor, as detailed in the Low-Noise Operation section and Typical Application Circuit. Using values outside 8–12nF degrades noise performance.
What is the thermal pad connection requirement for MAX8531ETTA8-T?
The exposed thermal pad on the MAX8531ETTA8-T QFN package must be soldered directly to the PCB ground plane using a minimum 2×2 array of thermal vias (0.3mm diameter, spaced ≤1mm apart) to ensure junction temperature remains below 150°C under full load. Failure to connect the pad risks thermal shutdown activation above 80°C ambient.
Can MAX8531ETTA8-T operate with input voltage below 2.5V?
No, MAX8531ETTA8-T has a guaranteed operating input range of 2.5V to 6.5V. Below 2.5V, undervoltage lockout (UVLO) activates at 2.25V (typ), disabling regulation. Attempting operation at 2.4V or lower results in unregulated output and potential instability - per Absolute Maximum Ratings and Electrical Characteristics tables.
MAX8531ETTA8-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.2V @ 100mA
- Current - Output:
- 200mA, 150mA
- Current - Quiescent (Iq):
- 220 µA
- Current - Supply (Max):
- -
- PSRR:
- 62dB (100Hz)
- Control Features:
- Enable, Reset
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TDFN-EP (3x3)
MAX8531ETTA8-T FAQ
1.How can I place an order for MAX8531ETTA8-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8531ETTA8-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 MAX8531ETTA8-T reliable?
The price and inventory of MAX8531ETTA8-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8531ETTA8-T is usually 5 days.
3.What payment methods are accepted for MAX8531ETTA8-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8531ETTA8-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8531ETTA8-T?
MAX8531ETTA8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8531ETTA8-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 MAX8531ETTA8-T?
For technical support, including MAX8531ETTA8-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8531ETTA8-T requirements.
6.How does Aetrix verify that MAX8531ETTA8-T is sourced from the original manufacturer or authorized distributors?
All MAX8531ETTA8-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 MAX8531ETTA8-T meets industry standards.
7.What is the process for return or replacement of MAX8531ETTA8-T?
All MAX8531ETTA8-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8531ETTA8-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 MAX8531ETTA8-T part is unused and in its original packaging.
Return procedure for MAX8531ETTA8-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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