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Analog Devices Inc./Maxim Integrated MAX8559ETAAG+T
- Part No.:
- MAX8559ETAAG+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX8559ETAAG+T.pdf
- Description:
- IC REG LIN 3.3V/3V 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,807
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Product details
Overview
MAX8559ETAAG+T from Maxim Integrated is a dual, low-noise, low-dropout linear regulator delivering 300mA per channel from 2.5V–6.5V input, with 32µVRMS output noise, 60mV dropout at 100mA, and independent logic-controlled shutdown inputs. It targets space-constrained, battery-powered systems requiring clean, stable dual-rail power for RF and analog circuitry.
For engineers reviewing the MAX8559ETAAG+T datasheet, MAX8559ETAAG+T pinout, MAX8559ETAAG+T application, or MAX8559ETAAG+T equivalent, key selection criteria include dual-output noise performance, thermal shutdown behavior, UCSP/TDFN package thermal dissipation limits, and factory-preset 2.85V/2.85V output configuration confirmed by top-mark "AIG".
Technical Context
The MAX8559ETAAG+T integrates two independent P-channel MOSFET pass transistors (0.6Ω RDS(ON)) with internal 1.25V bandgap reference and error amplifiers. Each LDO uses an internal resistor divider to set its factory-preset output voltage-here VOUTA = VOUTB = 2.85V per Output Voltage Selector Guide entry "ETAJJ".
Shutdown control is implemented via separate SHDNA/SHDNB inputs with 0.4V low-threshold and 1.6V high-threshold; driving either low disables its respective LDO while maintaining reference bias if the other is active. Thermal protection activates at +160°C with 10°C hysteresis, and output discharge occurs through a 385Ω internal resistor during shutdown.
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 rail, or 5V USB-supplied systems without external pre-regulation. |
| Output Voltage (per channel) | 2.85V (factory-preset) - fixed dual-rail output confirmed by top-mark "AIG", eliminating external feedback resistors and layout sensitivity. |
| Max Output Current | 300mA per LDO - sustains full load with 4.7µF ceramic output capacitor; 150mA supported with 2.2µF. |
| Dropout Voltage | 60mV at 100mA - enables operation down to ~2.91V input for 2.85V output, extending usable battery life in portable devices. |
| Output Noise | 32µVRMS (100Hz–100kHz) - achieved with 0.01µF BP capacitor; critical for powering RF transceivers and precision ADCs without added filtering. |
| PSRR | 70dB at 10kHz - suppresses switching noise from adjacent DC-DC converters, reducing need for additional LC filtering stages. |
| Quiescent Current | 115µA per LDO (no load) - minimizes standby power loss in always-on subsystems such as real-time clocks or sensor interfaces. |
| Thermal Shutdown | +160°C activation with 10°C hysteresis - protects against sustained overload in compact enclosures; TDFN package supports 1.95W dissipation. |
Pinout & Package
MAX8559ETAAG+T is packaged in an 8-pin TDFN-EP (3mm × 3mm, 0.8mm height) with exposed paddle for thermal management. The package is lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INA) | LDO A Input | Primary input for regulator A; must be bypassed with ≥2.2µF ceramic capacitor to GND; shared with INB for dual-input configuration. |
| 2 (SHDNA) | Shutdown A Control | Active-low enable for LDO A; logic low (<0.4V) disables OUTA and discharges it via 385Ω internal resistor. |
| 3 (SHDNB) | Shutdown B Control | Active-low enable for LDO B; independent of SHDNA, enabling asymmetric power sequencing or dynamic rail disable. |
| 4 (INB) | LDO B Input | Primary input for regulator B; electrically tied to INA in typical use; requires same input capacitance as INA. |
| 5 (OUTB) | LDO B Output | 2.85V regulated output sourcing up to 300mA; internally discharged during SHDNB assertion. |
| 6 (GND) | Power Ground | Common return path for both LDOs and internal circuitry; must connect directly to PCB ground plane. |
| 7 (BP) | Noise Bypass Reference | Connects to 0.01µF ceramic capacitor to reduce reference noise; omission increases output noise to 254µVRMS. |
| 8 (OUTA) | LDO A Output | 2.85V regulated output sourcing up to 300mA; internally discharged during SHDNA assertion. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Enables simultaneous generation of matched 2.85V rails for analog/RF sections without cross-talk or shared failure modes. |
| Low-noise 32µVRMS output | Meets stringent noise requirements for powering VCOs, PLLs, and high-resolution ADCs without external ferrite beads or LC filters. |
| Independent shutdown controls | Allows selective power gating of individual rails-e.g., disabling RF section while keeping baseband processor powered-reducing system-level standby current. |
| P-channel MOSFET pass devices | Delivers lower dropout than PNP-based regulators at light loads and eliminates base-drive current loss, improving efficiency across full load range. |
| Internal thermal and short-circuit protection | Prevents damage during fault conditions without external circuitry; thermal shutdown pulses output rather than latching off, aiding diagnostics. |
| Factory-preset 2.85V outputs | Eliminates external feedback networks, saving board area and component count while guaranteeing ±2% accuracy over -40°C to +85°C. |
Applications
| Cellular Transceiver Power | Dual-Rail Sensor Interface |
|---|---|
Use Scenario: Powering RF front-end modules (PA, LNA, mixer) and baseband ICs in 4G LTE handsets where supply noise directly impacts EVM and receiver sensitivity. IC Role / Device Role / Timing Role: Dual LDO providing isolated, ultra-low-noise 2.85V rails-one for RF section, one for digital baseband-minimizing coupling between sensitive analog and noisy digital domains. Use Value: 32µVRMS noise and 70dB PSRR at 10kHz prevent switching noise from PMICs from degrading RF performance, avoiding costly redesigns. | Use Scenario: Supplying precision analog front-end (AFE) and microcontroller in handheld medical sensors requiring stable, low-drift dual supplies. IC Role / Device Role / Timing Role: Regulator delivering tightly matched 2.85V outputs to AFE reference and MCU I/O, with independent shutdown enabling sleep-mode current reduction. Use Value: ±2% output accuracy over temperature and 60mV dropout extend battery runtime while maintaining ADC linearity and signal integrity. |
| Notebook Platform Controller Hub | Wireless LAN Card Core Logic |
Use Scenario: Providing auxiliary 2.85V rails to embedded controller (EC) and secure boot ROM in ultrabook platforms with strict thermal envelope constraints. IC Role / Device Role / Timing Role: Low-quiescent-current dual LDO supplying always-on EC domain and firmware storage interface, with thermal shutdown preventing overheating in thin-profile chassis. Use Value: 115µA per LDO quiescent current and 1.95W TDFN power dissipation capability ensure reliable operation without heatsinks or airflow dependency. | Use Scenario: Powering MAC processor and RF transceiver on mini-PCIe WLAN cards where PCB area is limited and EMI must be minimized. IC Role / Device Role / Timing Role: Compact dual LDO replacing discrete regulators to meet PCIe slot power budgets and FCC radiated emissions limits. Use Value: 2mm² UCSP option (not this variant) reduces footprint; TDFN version offers superior thermal performance for sustained 300mA transmit bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A202828PDBVR | Single-channel 2.8V LDO (not dual); 25µVRMS noise; 1.4V–6.0V input; 300mA output; SOT-23-5 package. | Requires two devices for dual-rail use; lacks independent shutdown; smaller package but no exposed thermal pad. | Select when board space permits duplication and independent rail control is not required. |
| ADP151AUJZ-2.85-R7 | Single-channel 2.85V LDO; 9µVRMS noise; 2.2V–5.5V input; 200mA output; TSOT-5 package. | Lower max current and tighter input range; superior noise but no dual output or shutdown independence. | Choose for ultra-low-noise single-rail applications where 200mA suffices and dual regulation is unnecessary. |
Compared with MAX8559ETAAG+T, the TPS7A202828PDBVR offers lower noise per channel but requires duplication and lacks independent shutdown, increasing BOM count and control complexity; the ADP151AUJZ-2.85-R7 delivers best-in-class noise but cannot replace the dual-output, thermally robust, and independently controllable functionality of the MAX8559ETAAG+T in integrated platform designs.
Availability
MAX8559ETAAG+T is available at Aetrix Electronics and suitable for cellular transceivers, notebook embedded controllers, wireless LAN cards, handheld medical instruments, and dual-rail sensor interfaces requiring stable component supply and long-term industrial availability.
Supply support for MAX8559ETAAG+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 precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX8559 belongs to Maxim's low-noise, dual-LDO product line engineered specifically for battery-powered portable electronics needing compact, efficient, and interference-resistant dual-rail regulation without external components.
FAQ
What output voltages does the MAX8559ETAAG+T provide?
The MAX8559ETAAG+T is factory-configured with dual 2.85V outputs, as confirmed by its top-mark "AIG" in the Output Voltage Selector Guide. Both OUTA and OUTB deliver 2.85V ±2% over -40°C to +85°C and load currents from 0.1mA to 300mA. No external resistors are needed-the voltage is fixed internally via laser-trimmed feedback dividers.
Does the MAX8559ETAAG+T require an external bypass capacitor on the BP pin?
Yes, the MAX8559ETAAG+T requires a 0.01µF ceramic capacitor between BP and GND to achieve its specified 32µVRMS output noise. Without this capacitor, output noise rises to 254µVRMS. The BP capacitor forms a low-pass filter with an internal resistor to attenuate reference noise; omitting it compromises noise-sensitive applications like RF power amplifiers or high-speed data converters.
How does thermal shutdown operate in the MAX8559ETAAG+T?
The MAX8559ETAAG+T features independent thermal detectors per LDO. When junction temperature exceeds +160°C, the affected regulator shuts down; it re-enables automatically after cooling by 10°C. This results in pulsed output under continuous overload-not latch-off-allowing system-level fault detection. The TDFN package's exposed paddle must be soldered to the PCB ground plane to achieve the rated 1.95W dissipation and effective thermal response.
Can the MAX8559ETAAG+T operate without output capacitors?
No, the MAX8559ETAAG+T requires minimum output capacitance for stability: 2.2µF ceramic for ≤150mA loads, or 4.7µF for full 300mA operation. Using insufficient capacitance risks oscillation or poor transient response. X7R/X5R dielectrics are recommended; Z5U/Y5V types may require ≥4.7µF below -10°C. Tantalum capacitors are explicitly not recommended due to ESR and reliability concerns.
What is the maximum input voltage the MAX8559ETAAG+T can tolerate continuously?
The MAX8559ETAAG+T has an absolute maximum input voltage rating of +7V on INA, INB, SHDNA, SHDNB, and BP pins relative to GND. However, the recommended operating range is strictly 2.5V to 6.5V per the Electrical Characteristics table. Exceeding 6.5V violates functional specifications and risks parametric degradation-even if within absolute maximum limits-so 6.5V remains the practical upper limit for reliable operation.
MAX8559ETAAG+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, 3V
- 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)
MAX8559ETAAG+T FAQ
1.How can I place an order for MAX8559ETAAG+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8559ETAAG+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 MAX8559ETAAG+T reliable?
The price and inventory of MAX8559ETAAG+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8559ETAAG+T is usually 5 days.
3.What payment methods are accepted for MAX8559ETAAG+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8559ETAAG+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8559ETAAG+T?
MAX8559ETAAG+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8559ETAAG+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 MAX8559ETAAG+T?
For technical support, including MAX8559ETAAG+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8559ETAAG+T requirements.
6.How does Aetrix verify that MAX8559ETAAG+T is sourced from the original manufacturer or authorized distributors?
All MAX8559ETAAG+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 MAX8559ETAAG+T meets industry standards.
7.What is the process for return or replacement of MAX8559ETAAG+T?
All MAX8559ETAAG+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8559ETAAG+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 MAX8559ETAAG+T part is unused and in its original packaging.
Return procedure for MAX8559ETAAG+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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