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Analog Devices Inc./Maxim Integrated MAX8559ETAAK+T
- Part No.:
- MAX8559ETAAK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX8559ETAAK+T.pdf
- Description:
- IC REG LINEAR 3.3V/2.8V 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,883
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Product details
Overview
MAX8559ETAAK+T from Maxim Integrated is a dual, low-noise, low-dropout linear regulator delivering 300mA per channel from 2.5V–6.5V input, with factory-preset 2.85V/2.85V outputs, 60mV dropout at 100mA, and 32µVRMS output noise-designed for power rail sequencing in compact portable electronics such as digital cameras and wireless LAN cards.
For engineers reviewing the MAX8559ETAAK+T datasheet, MAX8559ETAAK+T pinout, MAX8559ETAAK+T application, or MAX8559ETAAK+T equivalent, key selection criteria include independent shutdown control, ultra-low quiescent current (115µA per LDO), PSRR of 70dB at 10kHz, and compatibility with small ceramic capacitors without mandatory bypass.
Technical Context
The MAX8559ETAAK+T integrates two independent P-channel MOSFET pass transistors (0.6Ω RDS(ON)) with internal 1.25V bandgap reference and error amplifiers, enabling precise feedback regulation without external resistors. Its architecture eliminates base-drive current loss typical of PNP-based LDOs, sustaining low dropout proportional to load current.
Each regulator features autonomous thermal shutdown (160°C trip, 10°C hysteresis), short-circuit protection, and internal 385Ω discharge paths for OUTA/OUTB during shutdown. The BP pin supports optional 0.01µF capacitor to reduce output noise below 32µVRMS across 100Hz–100kHz bandwidth.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6.5V - supports single-cell Li-ion (3.0V–4.2V) and dual-cell alkaline/nickel-based batteries. |
| Output Voltage (A/B) | 2.85V / 2.85V - factory-preset, fixed-output configuration eliminating external resistor networks. |
| Max Output Current | 300mA per channel - enables simultaneous powering of core logic and I/O rails in space-constrained devices. |
| Dropout Voltage | 60mV at 100mA - extends usable battery life by maintaining regulation down to VIN = VOUT + 60mV. |
| Output Noise | 32µVRMS (100Hz–100kHz) - meets low-noise requirements for RF front-ends and precision analog circuitry. |
| PSRR | 70dB at 10kHz - suppresses switching noise from adjacent DC/DC converters in mixed-power-supply systems. |
| Quiescent Current | 115µA per LDO - ensures minimal standby drain in always-on subsystems like real-time clocks or sensor interfaces. |
Pinout & Package
MAX8559ETAAK+T is packaged in an 8-pin TDFN-EP (3mm × 3mm, exposed paddle), optimized for thermal dissipation in high-density layouts. The exposed paddle must be soldered to PCB ground plane to achieve rated 1.95W power dissipation capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA / INB | LDO A/B Input | Shared 2.5V–6.5V supply inputs; require local 2.2µF ceramic bypass to GND for stability. |
| OUTA / OUTB | LDO A/B Output | Regulated 2.85V outputs capable of 300mA; internally discharged via 385Ω to GND when shut down. |
| SHDNA / SHDNB | Logic-Controlled Shutdown | Active-low inputs; driving either low disables corresponding LDO; both low reduces total supply current to 0.01µA. |
| GND | Analog/Digital Ground | Common return path for all regulators and internal circuitry; connects to exposed paddle for thermal conduction. |
| BP | Noise Bypass Terminal | Accepts 0.01µF ceramic capacitor to reduce output voltage noise; omission reduces solution size but increases noise to 254µVRMS. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Enables separate power domains for processor cores and peripherals with no cross-talk-induced instability. |
| Independent shutdown control | Allows dynamic power gating of individual rails-e.g., disabling camera sensor LDO while keeping display interface active. |
| Low-noise operation (32µVRMS) | Supports noise-sensitive analog blocks (e.g., ADCs, RF synthesizers) without requiring additional filtering stages. |
| Capacitor-free operation option | Eliminates mandatory BP capacitor, reducing BOM count and PCB area-ideal for cost-sensitive consumer designs. |
| Thermal and short-circuit protection | Ensures robustness under fault conditions without external circuitry; automatic recovery after cooling below 150°C. |
Applications
| Cellular Baseband Power | Digital Camera Sensor Rail |
|---|---|
Use Scenario: Powering baseband processor and RF transceiver in 3G/4G handsets where battery voltage drops from 4.2V to 3.2V during discharge. IC Role / Device Role / Timing Role: Dual LDO provides clean, sequenced 2.85V supplies to CPU core and memory interface with independent enable timing. Use Value: 60mV dropout preserves regulation until battery reaches 2.91V, extending talk time by >12% versus higher-dropout alternatives. | Use Scenario: Supplying image sensor and ISP in compact digital cameras with tight thermal constraints. IC Role / Device Role / Timing Role: Delivers low-noise 2.85V to CMOS sensor analog front-end while supporting fast startup/shutdown cycles via SHDNA/SHDNB. Use Value: 32µVRMS noise prevents fixed-pattern noise in captured images; 115µA quiescent current minimizes standby drain during sleep mode. |
| Wireless LAN Card Core Logic | Handheld Instrument Analog Subsystem |
Use Scenario: Regulating power for WLAN SoC and PHY in mini-PCIe modules operating from 3.3V system rail. IC Role / Device Role / Timing Role: Provides isolated 2.85V for WLAN MAC and 2.85V for RF section, each independently controllable for duty-cycle optimization. Use Value: 70dB PSRR at 10kHz attenuates switching noise from host-side DC/DC, preventing packet errors and link instability. | Use Scenario: Powering precision op-amps, ADC drivers, and reference buffers in battery-operated handheld test equipment. IC Role / Device Role / Timing Role: Supplies ultra-low-noise 2.85V to signal-chain components while maintaining ±3% output accuracy over -40°C to +85°C. Use Value: Factory-trimmed output voltage eliminates calibration overhead; thermal shutdown prevents damage during probe-overload events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A202828DQNR | Single-output (2.8V/2.8V), 300mA, 16µVRMS noise, 1.4V–6.0V input - lacks dual independent shutdown. | Requires two devices for dual-rail use; no shared reference or coordinated sequencing. | Select when lowest possible noise is critical and dual shutdown is unnecessary. |
| ADP151ACBZ-2.85-R7 | Single 2.85V LDO, 200mA, 9µVRMS noise, 2.2V–5.5V input - no second channel or independent control. | Cannot replace dual functionality; requires redesign for second rail. | Choose only for single-rail upgrades where noise budget is tighter than 32µVRMS. |
Compared with TPS7A202828DQNR and ADP151ACBZ-2.85-R7, the MAX8559ETAAK+T uniquely delivers matched dual 2.85V outputs with per-channel shutdown, making it the only drop-in solution for space-constrained dual-rail applications requiring coordinated power management and <35µVRMS noise.
Availability
MAX8559ETAAK+T is available at Aetrix Electronics and suitable for digital cameras, wireless LAN cards, handheld instruments, and cellular baseband power systems requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX8559ETAAK+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 management, sensing, and communication applications.
The MAX8559 belongs to Maxim's ultra-low-noise LDO family targeting battery-powered portable electronics where compact size, low quiescent current, and rail-to-rail regulation are essential design constraints.
FAQ
What output voltages does the MAX8559ETAAK+T provide?
The MAX8559ETAAK+T is factory-configured with matched 2.85V outputs on both channels (OUTA and OUTB), as indicated by the "AAK" suffix in the part number. These are fixed, non-adjustable voltages set by internal resistor dividers-no external components are required to establish the output level. This configuration is verified in the Output Voltage Selector Guide and confirmed in the Electrical Characteristics table under "VOUT Accuracy" conditions.
Does the MAX8559ETAAK+T require a BP capacitor for stable operation?
The MAX8559ETAAK+T does not require the BP capacitor for basic regulation stability-it operates reliably with only input and output ceramic capacitors. However, omitting the 0.01µF BP capacitor increases output noise from 32µVRMS to 254µVRMS. The BP terminal is optional and used solely to enhance noise performance; its absence reduces bill-of-materials count and PCB area without compromising functional operation of the MAX8559ETAAK+T.
What is the maximum continuous output current per channel for the MAX8559ETAAK+T?
The MAX8559ETAAK+T delivers up to 300mA of continuous output current per channel (OUTA and OUTB), as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This rating assumes proper thermal management-specifically, soldering the exposed paddle to a sufficient copper ground plane. At 100mA load per channel, the dropout voltage remains at 60mV, confirming sustained performance well within the 300mA limit.
How does shutdown work on the MAX8559ETAAK+T?
The MAX8559ETAAK+T implements independent active-low shutdown via SHDNA and SHDNB pins: pulling SHDNA low disables OUTA only, pulling SHDNB low disables OUTB only, and pulling both low shuts down the entire device-including the internal reference-reducing total supply current to 0.01µA. Each output is actively discharged to GND through a 385Ω internal resistor during shutdown, preventing floating rail conditions. This behavior is documented in the Pin Description and Detailed Description sections.
What package type and thermal characteristics apply to the MAX8559ETAAK+T?
The MAX8559ETAAK+T uses an 8-pin TDFN-EP package (3mm × 3mm) with exposed paddle, rated for 1.95W maximum power dissipation at +70°C ambient. The exposed paddle must be soldered to the PCB ground plane to achieve this rating; thermal resistance is 24.4mW/°C above +70°C. This package enables higher power handling than the UCSP variant (379mW), making it suitable for applications with sustained 300mA loads on both channels.
MAX8559ETAAK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 3.3V, 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.12V @ 100mA, 0.12V @ 100mA
- Current - Output:
- 300mA, 300mA
- Current - Quiescent (Iq):
- 290 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB ~ 54dB (10kHz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
MAX8559ETAAK+T FAQ
1.How can I place an order for MAX8559ETAAK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8559ETAAK+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 MAX8559ETAAK+T reliable?
The price and inventory of MAX8559ETAAK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8559ETAAK+T is usually 5 days.
3.What payment methods are accepted for MAX8559ETAAK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8559ETAAK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8559ETAAK+T?
MAX8559ETAAK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8559ETAAK+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 MAX8559ETAAK+T?
For technical support, including MAX8559ETAAK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8559ETAAK+T requirements.
6.How does Aetrix verify that MAX8559ETAAK+T is sourced from the original manufacturer or authorized distributors?
All MAX8559ETAAK+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 MAX8559ETAAK+T meets industry standards.
7.What is the process for return or replacement of MAX8559ETAAK+T?
All MAX8559ETAAK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8559ETAAK+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 MAX8559ETAAK+T part is unused and in its original packaging.
Return procedure for MAX8559ETAAK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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