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Analog Devices Inc./Maxim Integrated MAX8531ETTGG
- Part No.:
- MAX8531ETTGG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX8531ETTGG.pdf
- Description:
- IC REG LINEAR DUAL LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,641
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Product details
Overview
The MAX8531ETTGG from Maxim Integrated is a dual low-dropout linear regulator IC with integrated low-noise output architecture, designed for space-constrained battery-powered systems. It delivers 3.0V/3.0V outputs at up to 200mA (OUT1) and 150mA (OUT2), features 100mV typical dropout at 100mA load, 40µVRMS output noise (with 10nF BP capacitor), and operates from 2.5V–6.5V input. It is used in digital cameras and notebook computers for clean core/voltage I/O rail generation.
For engineers reviewing the MAX8531ETTGG datasheet, MAX8531ETTGG pinout, MAX8531ETTGG application, or MAX8531ETTGG equivalent, key selection criteria include dual-rail low-noise regulation, UCSP/QFN package compatibility, thermal shutdown behavior, and BP pin bypass configuration for noise-sensitive analog subsystems.
Technical Context
The MAX8531ETTGG integrates two independent P-channel MOSFET-based LDO regulators sharing a common 1.25V bandgap reference and error amplifiers. Each regulator uses internal feedback dividers to set fixed 3.0V outputs, with current limiting (210mA min for OUT1, 165mA min for OUT2) and thermal shutdown at +160°C (10°C hysteresis).
Unlike the MAX8530, the MAX8531ETTGG replaces the RESET output with a BP (bypass) pin connected to an internal resistor to form a low-pass filter with an external 10nF ceramic capacitor-enabling 40µVRMS output noise performance across both outputs while maintaining identical dropout, quiescent current (130µA typ), and shutdown specs (<1µA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V / 3.0V (fixed, factory-set; no external resistors required) |
| Max Output Current | 200mA on OUT1, 150mA on OUT2 - supports dual-core logic + I/O rails |
| Dropout Voltage | 100mV (typ) at 100mA - enables operation down to VIN = VOUT + 0.1V |
| Output Noise | 40µVRMS (10Hz–100kHz) - achieved only with 10nF capacitor on BP pin |
| Quiescent Current | 130µA (both LDOs active) - constant across load and dropout, enabling long battery life |
| Shutdown Current | <1µA - reduces system standby power in portable devices |
| Input Voltage Range | 2.5V to 6.5V - compatible with single Li-ion, Li-poly, or 3.3V/5V system rails |
Pinout & Package
MAX8531ETTGG is housed in a 6-pin thin QFN package (3mm × 3mm × 0.8mm) with exposed thermal pad (EP), RoHS-compliant and lead-free. The GND pin serves dual electrical and thermal functions-must be soldered to a large PCB ground plane for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Supply | Accepts 2.5V–6.5V; requires 2.2µF ceramic input capacitor for stability |
| 2 (OUT1) | Regulator 1 Output | Fixed 3.0V, 200mA-capable rail for VCORE or main processor supply |
| 3 (OUT2) | Regulator 2 Output | Fixed 3.0V, 150mA-capable rail for I/O, memory, or peripheral supply |
| 4 (GND) | Ground & Thermal Pad | Primary return path and heatsink; must connect to large copper area |
| 5 (SHDN) | Logic-Controlled Shutdown | Active-high; drives low to reduce IQ to <1µA; tie to IN for always-on operation |
| 6 (BP) | Reference Bypass | Connects to 10nF ceramic cap to reduce reference noise-critical for 40µVRMS spec |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Enables simultaneous regulation of two critical voltage domains without cross-talk (≥60dB isolation @ 100kHz) |
| Low-noise BP architecture | 40µVRMS output noise achievable only with 10nF capacitor on BP pin-optimized for ADCs, RF, and audio |
| P-channel pass transistors | Eliminates base-drive current; maintains 130µA IQ regardless of load or dropout condition |
| Thermal & short-circuit protection | Auto-recovery shutdown at +160°C junction temp; indefinite short-circuit survival without damage |
| Ultra-small QFN package | 3mm × 3mm footprint with exposed pad-reduces board area by >50% vs. SOIC-8 equivalents |
Applications
| Cellular Baseband Power | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Powering baseband processor and RF transceiver in 3G/4G handsets where noise coupling degrades receive sensitivity. IC Role / Device Role / Timing Role: Dual-rail LDO supplying clean 3.0V VCORE and 3.0V I/O rails with channel-to-channel isolation ≥60dB. Use Value: 40µVRMS noise and high PSRR (62dB @ 100Hz) prevent switching noise from corrupting sensitive RF front-end signals. | Use Scenario: Biasing CMOS image sensor and ISP in compact digital cameras requiring ultra-low noise analog supplies. IC Role / Device Role / Timing Role: Low-noise dual LDO delivering matched 3.0V rails to sensor analog block and ISP core logic. Use Value: BP pin + 10nF capacitor ensures 40µVRMS noise floor-critical for preserving dynamic range and SNR in 12-bit+ imaging pipelines. |
| Notebook Platform I/O Rail | Wireless LAN Card Core Supply |
Use Scenario: Generating stable 3.0V I/O voltage for PCIe interface, card reader, or USB controller in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary LDO regulating isolated 3.0V domain from main 3.3V or 5V system rail. Use Value: 100mV dropout allows extended runtime as battery discharges below 3.3V; 150mA OUT2 capacity supports burst-mode peripherals. | Use Scenario: Supplying 3.0V core voltage to WLAN SoC (e.g., Broadcom BCM43xx) on mini-PCIe or M.2 cards. IC Role / Device Role / Timing Role: Compact dual LDO providing regulated 3.0V for WLAN MAC/PHY and 3.0V for RF front-end bias. Use Value: 3mm × 3mm QFN fits tight card-edge layouts; thermal pad enables reliable 200mA delivery in confined airflow environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO low-noise applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS70245PWPR | Fixed 3.3V/1.8V outputs; higher 180mV dropout; no BP pin or sub-50µVRMS noise spec | Targeted at mixed-voltage DSP platforms-not optimized for same-rail low-noise dual supply | Select when fixed asymmetric voltages are needed and noise <50µVRMS is not required |
| ADP5070ACPZ-R7 | Includes boost converter + LDO; 3.0V/3.0V option available; 55µVRMS noise; larger 16-pin LFCSP | Used in hybrid DC/DC + LDO designs where input voltage may fall below 2.5V | Select when input can dip below 2.5V and board area permits larger package |
Compared with TPS70245PWPR and ADP5070ACPZ-R7, the MAX8531ETTGG uniquely delivers matched 3.0V/3.0V outputs with industry-leading 40µVRMS noise in a 3mm × 3mm QFN-making it optimal for same-rail, space-constrained, noise-sensitive dual-supply systems.
Availability
MAX8531ETTGG is available at Aetrix Electronics and suitable for digital cameras, notebook computers, and wireless LAN cards requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8531ETTGG 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 precision analog, mixed-signal, and power management ICs for industrial, automotive, communications, and consumer applications.
The MAX8530/MAX8531 product line targets ultra-low-power, space-constrained portable electronics-emphasizing minimal dropout, nanoscale packaging (UCSP/QFN), and application-specific features like RESET or BP-controlled low-noise operation.
FAQ
What output voltages does the MAX8531ETTGG provide?
The MAX8531ETTGG provides two fixed 3.0V outputs-one on OUT1 (rated for 200mA) and one on OUT2 (rated for 150mA). These voltages are factory-trimmed and require no external resistors. The top-mark "AEF" on the package confirms the 3.0V/3.0V configuration per the Output Voltage Selector Guide. Output accuracy is ±3% over temperature and load.
How do I achieve the 40µVRMS noise specification with the MAX8531ETTGG?
To achieve the guaranteed 40µVRMS output noise (10Hz–100kHz) with the MAX8531ETTGG, you must connect a 10nF X7R or C0G ceramic capacitor between the BP pin and GND. This forms a low-pass filter with an internal resistor. Using a different value, dielectric, or omitting the capacitor results in higher noise-up to 320µVRMS (as specified for MAX8530).
Does the MAX8531ETTGG have a reset output function?
No, the MAX8531ETTGG does not include a reset output. That feature is exclusive to the MAX8530 family (e.g., MAX8530ETTGG). The MAX8531ETTGG substitutes the RESET pin with a BP (bypass) pin for low-noise operation. If reset functionality is required, the MAX8530ETTGG or a discrete supervisor IC must be used instead.
What is the recommended PCB layout for thermal management of the MAX8531ETTGG?
For optimal thermal performance, the exposed pad (EP) and Pin 4 (GND) of the MAX8531ETTGG must be soldered to a minimum 100mm² copper area connected to the main PCB ground plane using at least four 0.3mm thermal vias. Avoid isolating the pad-this configuration reduces θJA by ~35°C/W and prevents thermal shutdown during sustained 200mA loads.
Can the MAX8531ETTGG operate with input voltages below 2.5V?
No, the MAX8531ETTGG has a specified minimum input voltage of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V risks undervoltage lockout activation (VUVLO = 2.25V typ) and unregulated output. For sub-2.5V inputs, consider the MAX8529 or other dedicated low-VIN LDOs-not the MAX8531ETTGG.
MAX8531ETTGG 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):
- 3V, 3V
- 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)
MAX8531ETTGG FAQ
1.How can I place an order for MAX8531ETTGG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8531ETTGG 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 MAX8531ETTGG reliable?
The price and inventory of MAX8531ETTGG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8531ETTGG is usually 5 days.
3.What payment methods are accepted for MAX8531ETTGG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8531ETTGG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8531ETTGG?
MAX8531ETTGG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8531ETTGG 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 MAX8531ETTGG?
For technical support, including MAX8531ETTGG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8531ETTGG requirements.
6.How does Aetrix verify that MAX8531ETTGG is sourced from the original manufacturer or authorized distributors?
All MAX8531ETTGG 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 MAX8531ETTGG meets industry standards.
7.What is the process for return or replacement of MAX8531ETTGG?
All MAX8531ETTGG units undergo pre-shipment inspection (PSI). If there is an issue with MAX8531ETTGG, 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 MAX8531ETTGG part is unused and in its original packaging.
Return procedure for MAX8531ETTGG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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