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Analog Devices Inc./Maxim Integrated MAX8559ETAJJ+T
- Part No.:
- MAX8559ETAJJ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX8559ETAJJ+T.pdf
- Description:
- IC REG LINEAR 2.85V/2.85V 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,135
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Product details
Overview
MAX8559ETAJJ+T from Maxim Integrated is a dual, low-noise, low-dropout linear regulator delivering 300mA per channel with factory-preset 2.85V outputs, 60mV dropout at 100mA, 32µVRMS output noise, and independent logic-controlled shutdown-designed for space-constrained battery-powered systems such as digital cameras and handheld instruments.
For engineers reviewing the MAX8559ETAJJ+T datasheet, MAX8559ETAJJ+T pinout, MAX8559ETAJJ+T application, or MAX8559ETAJJ+T equivalent, key selection criteria include dual-output voltage matching (2.85V/2.85V), TDFN-EP package thermal performance, PSRR of 70dB at 10kHz, and operation without mandatory bypass capacitor on BP.
Technical Context
The MAX8559ETAJJ+T integrates two independent P-channel MOSFET pass transistors (RDS(ON) ≈ 0.6Ω) enabling load-proportional dropout and ultra-low quiescent current (115µA per LDO). Its internal 1.25V bandgap reference feeds error amplifiers that regulate via fixed internal feedback dividers-no external resistors required for the 2.85V/2.85V configuration.
Each LDO features autonomous current limiting (310mA min), thermal shutdown at +160°C with 10°C hysteresis, and internal 385Ω discharge paths for OUTA/OUTB during shutdown. The BP pin accepts a 0.01µF ceramic capacitor to form an RC filter that reduces broadband output noise to ≤32µVRMS (100Hz–100kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.85V / 2.85V (factory-preset, no external resistors needed) |
| Max Output Current | 300mA per channel (requires ≥4.7µF output capacitor) |
| Dropout Voltage | 60mV at 100mA load (enables extended battery runtime near end-of-life) |
| Output Noise | 32µVRMS (100Hz–100kHz, with 0.01µF BP cap; enables clean analog/RF supply rails) |
| PSRR | 70dB at 10kHz (rejects switching noise from adjacent DC/DC converters) |
| Quiescent Current | 115µA per LDO (independent of load; critical for standby power budgeting) |
| Input Voltage Range | 2.5V to 6.5V (supports single-cell Li-ion, dual-cell alkaline, or regulated 3.3V/5V rails) |
| Shutdown Current | 0.01µA (both LDOs and reference off; enables deep-sleep system states) |
Pinout & Package
MAX8559ETAJJ+T is housed in an 8-pin TDFN-EP package (3mm × 3mm × 0.8mm) with exposed paddle soldered to PCB ground for enhanced thermal dissipation (1951mW max power at +70°C ambient).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 INA | LDO A input | Shared input rail for both regulators; requires ≥2.2µF ceramic bypass to GND |
| 2 SHDNA | LDO A shutdown control | Logic-low disables OUTA; internal 385Ω discharge path activates |
| 3 SHDNB | LDO B shutdown control | Logic-low disables OUTB; independent of SHDNA for flexible power sequencing |
| 4 INB | LDO B input | Electrically tied to INA; not isolated-same input source for both LDOs |
| 5 OUTB | LDO B output | 300mA capable; internally discharged to GND when SHDNB = low |
| 6 GND | Power and signal ground | Common return for all currents; must connect exposed paddle to this node |
| 7 BP | Noise bypass reference | 0.01µF ceramic cap here reduces output noise by filtering reference path |
| 8 OUTA | LDO A output | 300mA capable; internally discharged to GND when SHDNA = low |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Enables separate power domains for core logic and I/O peripherals without cross-talk |
| Low-noise regulation | 32µVRMS output noise supports noise-sensitive ADCs, RF front-ends, and precision sensors |
| Independent shutdown inputs | Allows staggered power-up/down sequencing and dynamic power gating per rail |
| P-channel MOSFET pass devices | Eliminates base-drive current loss-reduces quiescent current vs. PNP-based LDOs |
| No mandatory BP capacitor | Permits solution size reduction to 2mm² footprint when noise requirements allow |
| Thermal and short-circuit protection | Auto-recovering shutdown prevents damage during overload or poor heatsinking |
Applications
| Digital Cameras | Handheld Instruments |
|---|---|
Use Scenario: Powering image sensor and ISP core logic from a single Li-ion cell. IC Role / Device Role / Timing Role: Dual LDO supplies clean 2.85V rails-one for sensor analog bias, one for digital processing-minimizing noise coupling. Use Value: 32µVRMS noise and 70dB PSRR prevent image artifacts from switching supply noise. | Use Scenario: Battery-operated multimeter with LCD display and microcontroller. IC Role / Device Role / Timing Role: Provides stable 2.85V for MCU core and 2.85V for display driver, with independent shutdown for display sleep mode. Use Value: 115µA per LDO quiescent current extends battery life during measurement standby. |
| Wireless LAN Cards | PCMCIA Cards |
Use Scenario: Compact WLAN module requiring low EMI and fast transient response. IC Role / Device Role / Timing Role: Supplies 2.85V to RF transceiver and baseband processor with independent enable controls. Use Value: 60mV dropout at 100mA allows operation down to 2.91V input-maximizing usable battery voltage range. | Use Scenario: Hot-pluggable PCMCIA card with multiple voltage domains. IC Role / Device Role / Timing Role: Generates matched 2.85V rails for card controller and interface logic with controlled power sequencing. Use Value: Independent SHDNA/SHDNB pins enable safe power-up order per PCMCIA specification. |
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-output (2.8V/2.8V), 300mA, 16µVRMS noise, SOT-23-5 package | Requires two devices for dual-rail use; lacks independent shutdown | Select when board area permits discrete dual placement and simplified control suffices |
| ADP151ACBZ-2.85-R7 | Single 2.85V LDO, 200mA, 9µVRMS noise, 0.9mm × 0.9mm WLCSP | Lower current rating; no second output or independent shutdown | Select when only one 2.85V rail is needed and ultra-low noise is prioritized over dual functionality |
Compared with TPS7A202828PDBVR and ADP151ACBZ-2.85-R7, the MAX8559ETAJJ+T uniquely delivers matched dual 2.85V outputs with independent shutdown in a single 3mm × 3mm TDFN-reducing component count, PCB area, and inter-rail noise coupling while maintaining 300mA capability per rail.
Availability
MAX8559ETAJJ+T is available at Aetrix Electronics and suitable for digital cameras, handheld instruments, wireless LAN cards, and PCMCIA cards requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX8559ETAJJ+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, mixed-signal, and power-management ICs for demanding industrial, communications, and consumer applications.
The MAX8559 belongs to Maxim's low-noise, low-quiescent-current LDO family-engineered specifically for battery-powered portable electronics where output accuracy, noise immunity, and standby power efficiency are critical.
FAQ
What output voltages does the MAX8559ETAJJ+T provide?
The MAX8559ETAJJ+T is factory-configured with matched 2.85V outputs on both OUTA and OUTB. This preset voltage is achieved using internal feedback dividers-no external resistors are required. The "JJ" suffix in the part number explicitly denotes the 2.85V/2.85V option per Maxim's Output Voltage Selector Guide, and the voltage remains stable across load currents from 0.1mA to 300mA and temperatures from -40°C to +85°C.
Does the MAX8559ETAJJ+T require an external capacitor on the BP pin?
The MAX8559ETAJJ+T does not require an external capacitor on the BP pin for basic operation, but adding a 0.01µF ceramic capacitor reduces output voltage noise to 32µVRMS (100Hz–100kHz). Without it, noise rises to 254µVRMS. The BP capacitor is optional for size- or cost-constrained designs where noise sensitivity is low, but it is strongly recommended for analog/RF supply rails powered by MAX8559ETAJJ+T.
What is the thermal performance difference between the UCSP and TDFN packages for MAX8559ETAJJ+T?
The MAX8559ETAJJ+T is specified only in the 8-pin TDFN-EP package-not UCSP. While the MAX8559 family offers both, the "ETA" prefix denotes TDFN (e.g., MAX8559ETAJJ+T), whereas "EBA" indicates UCSP. The TDFN package provides 1951mW maximum power dissipation at +70°C ambient (derating 24.4mW/°C above), versus 379mW for UCSP-making TDFN essential for high-current or high-ambient-temperature applications of MAX8559ETAJJ+T.
Can the MAX8559ETAJJ+T operate with different input and output voltages on each channel?
No-the MAX8559ETAJJ+T has a shared input structure: INA and INB are electrically connected internally and must be supplied from the same input rail (2.5V to 6.5V). Both LDOs generate their respective 2.85V outputs from this common input. Independent input voltages are not supported; the device is designed for dual-rail generation from a single source, not dual-input operation.
How does the MAX8559ETAJJ+T handle short-circuit conditions?
The MAX8559ETAJJ+T incorporates independent current-limit circuitry for each LDO, triggering at 310mA (minimum). During a short circuit, the affected output shuts down while the other LDO continues operating normally. The device also features thermal-overload protection: if junction temperature exceeds +160°C, the overloaded regulator's pass transistor turns off until temperature drops by 10°C, then resumes operation-preventing permanent damage during sustained fault conditions.
MAX8559ETAJJ+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):
- 2.85V, 2.85V
- 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)
MAX8559ETAJJ+T FAQ
1.How can I place an order for MAX8559ETAJJ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8559ETAJJ+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 MAX8559ETAJJ+T reliable?
The price and inventory of MAX8559ETAJJ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8559ETAJJ+T is usually 5 days.
3.What payment methods are accepted for MAX8559ETAJJ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8559ETAJJ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8559ETAJJ+T?
MAX8559ETAJJ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8559ETAJJ+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 MAX8559ETAJJ+T?
For technical support, including MAX8559ETAJJ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8559ETAJJ+T requirements.
6.How does Aetrix verify that MAX8559ETAJJ+T is sourced from the original manufacturer or authorized distributors?
All MAX8559ETAJJ+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 MAX8559ETAJJ+T meets industry standards.
7.What is the process for return or replacement of MAX8559ETAJJ+T?
All MAX8559ETAJJ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8559ETAJJ+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 MAX8559ETAJJ+T part is unused and in its original packaging.
Return procedure for MAX8559ETAJJ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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