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Analog Devices Inc./Maxim Integrated MAX8559EBA11+T
- Part No.:
- MAX8559EBA11+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFBGA, CSPBGA
- Datasheet:
-
MAX8559EBA11+T.pdf
- Description:
- IC REG LINEAR 1.85V/1.85V 8UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,993
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Product details
Overview
MAX8559EBA11+T from Maxim Integrated is a dual, low-noise, low-dropout linear regulator delivering 300mA per channel with factory-preset 1.85V outputs, 60mV dropout at 100mA, 32µVRMS output noise, and independent logic-controlled shutdown-designed for space-constrained battery-powered systems such as handheld instruments and digital cameras.
For engineers reviewing the MAX8559EBA11+T datasheet, MAX8559EBA11+T pinout, MAX8559EBA11+T application, or MAX8559EBA11+T equivalent, key selection criteria include dual-output voltage matching (1.85V/1.85V), UCSP package footprint (2mm × 1mm), thermal shutdown behavior (+160°C), and bypass-capacitor–free operation capability.
Technical Context
The MAX8559EBA11+T integrates two independent P-channel MOSFET pass transistors (RDS(ON) ≈ 0.6Ω) with internal 1.25V bandgap reference and error amplifiers, enabling precise feedback control without external resistors. Each LDO features autonomous current limiting (310mA min), thermal shutdown with 10°C hysteresis, and internal discharge paths (385Ω) during shutdown.
Its architecture supports operation without a BP bypass capacitor-reducing solution size-while maintaining 70dB PSRR at 10kHz and channel-to-channel isolation >60dB above 100kHz. Input voltage range (2.5V–6.5V) and output accuracy (±3% over –40°C to +85°C) are optimized for Li-ion and multi-cell alkaline battery rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.85V per channel (factory-preset, fixed; no external feedback required) |
| Max Output Current | 300mA per LDO (sustained; supported by 4.7µF ceramic output capacitors) |
| Dropout Voltage | 60mV at 100mA load (enables extended battery runtime near end-of-discharge) |
| Output Noise | 32µVRMS (100Hz–100kHz, with 0.01µF BP capacitor; critical for RF/analog supply rails) |
| PSRR | 70dB at 10kHz (rejects switching noise from adjacent DC-DC converters) |
| Quiescent Current | 115µA per LDO (load-independent; enables ultra-low-power standby modes) |
| Shutdown Current | 0.01µA (both LDOs and reference disabled; suitable for deep-sleep system states) |
Pinout & Package
MAX8559EBA11+T is packaged in an 8-bump UCSP (2.06mm × 1.03mm, 0.4mm pitch), lead-free, with exposed die attach pad not electrically connected. The package supports reflow soldering per JEDEC J-STD-020 and provides 379mW max power dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA / INB | LDO A and B input supply terminals | Shared 2.5V–6.5V input rail; must be bypassed with ≥2.2µF ceramic capacitor to GND |
| OUTA / OUTB | Regulated 1.85V output terminals | Each sources up to 300mA; internally discharged via 385Ω resistor when corresponding SHDN is low |
| SHDNA / SHDNB | Independent active-low shutdown controls | Logic-low disables respective LDO; both low disables entire IC and reference (10nA typ) |
| GND | Analog/digital ground reference | Common return path for inputs, outputs, and internal circuitry; connects to PCB ground plane |
| BP | Reference noise bypass terminal | Accepts 0.01µF ceramic capacitor to reduce output noise; optional for non-critical noise applications |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Enables separate power domains for analog and digital subsystems without cross-talk |
| No external feedback resistors | Reduces BOM count and layout area; eliminates resistor tolerance-induced output drift |
| Internal 385Ω discharge path | Prevents floating outputs and ensures controlled power-down sequencing |
| Thermal shutdown with hysteresis | +160°C trip point with 10°C recovery margin prevents thermal oscillation under overload |
| P-channel MOSFET pass devices | Delivers lower dropout than PNP-based regulators, especially at light loads (e.g., <10mA) |
Applications
| Handheld Instruments | Digital Cameras |
|---|---|
Use Scenario: Portable multimeter or spectrum analyzer requiring stable dual-rail analog and digital supplies. IC Role / Device Role / Timing Role: Dual LDO providing isolated 1.85V rails for precision ADC front-end and microcontroller core. Use Value: 32µVRMS noise and 70dB PSRR prevent measurement offset drift caused by switching supply coupling. |
Use Scenario: Image sensor and ISP subsystem in compact digital camera modules. IC Role / Device Role / Timing Role: Low-noise 1.85V supply for CMOS image sensor analog chain and 1.85V I/O domain for ISP interface. Use Value: Independent shutdown allows sensor power gating during idle frames, reducing system quiescent current by 230µA. |
| PDAs and Palmtop Computers | Wireless LAN Cards |
Use Scenario: Legacy PDA with ARM-based processor and touch controller needing tightly regulated dual supplies. IC Role / Device Role / Timing Role: Primary 1.85V LDO for CPU I/O and secondary 1.85V LDO for touchscreen controller ASIC. Use Value: 60mV dropout extends usable battery life by ~12 minutes on single-cell Li-ion before brownout. |
Use Scenario: Mini-PCIe WLAN card with baseband processor and RF transceiver requiring clean, sequenced power. IC Role / Device Role / Timing Role: Dual 1.85V outputs powering baseband logic and RF synthesizer VCO supply. Use Value: Channel-to-channel isolation >65dB at 2.4GHz prevents LO leakage from degrading receiver sensitivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2028PDBVR | Single 2.8V output; 300mA; 16µVRMS noise; 500mA peak; 0.8mm × 0.8mm DSBGA | Not dual-output; requires two devices for 1.85V/1.85V; lacks independent shutdown | Select only if board space permits dual placement and fixed 2.8V suffices |
| ADP151ACBZ-1.8-R7 | Single 1.8V LDO; 200mA; 9µVRMS noise; 1.0mm × 1.0mm WLCSP; no shutdown pin | Lower current and noise, but no dual output or enable control; requires external sequencing | Choose for ultra-low-noise single-rail apps where 1.8V matches and shutdown is managed externally |
Compared with MAX8559EBA11+T, TPS7A2028PDBVR offers lower noise but forces duplication for dual-rail use, while ADP151ACBZ-1.8-R7 trades integration for noise performance-neither provides factory-matched 1.85V/1.85V outputs with independent control in a 2mm² footprint.
Availability
MAX8559EBA11+T is available at Aetrix Electronics and suitable for handheld instruments, digital cameras, and wireless LAN cards requiring stable component supply, long-lifecycle support, and consistent factory-preset voltage matching.
Supply support for MAX8559EBA11+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 interface applications in industrial, automotive, and consumer systems.
The MAX8559 product line delivers dual, low-noise, low-quiescent-current LDOs in ultra-small packages for battery-powered portable electronics where board space, thermal constraints, and supply cleanliness are critical.
FAQ
What output voltage does the MAX8559EBA11+T provide?
The MAX8559EBA11+T provides two identical, factory-preset 1.85V outputs (VOUTA = VOUTB = 1.85V). This fixed voltage is laser-trimmed during production and requires no external feedback components. Output accuracy is ±3% over –40°C to +85°C and ±1% at +25°C, making MAX8559EBA11+T suitable for applications demanding tight regulation without calibration.
Can the MAX8559EBA11+T operate without the BP bypass capacitor?
Yes, the MAX8559EBA11+T can operate without the 0.01µF BP capacitor. Omitting it reduces total solution size and cost but increases output noise from 32µVRMS to 254µVRMS (100Hz–100kHz). The BP pin is optional and intended only for noise-sensitive analog rails; MAX8559EBA11+T maintains full regulation, stability, and protection functionality with BP left unconnected.
What is the maximum continuous output current per channel of the MAX8559EBA11+T?
The MAX8559EBA11+T delivers up to 300mA of continuous output current per channel (OUTA and OUTB). This rating assumes use of a 4.7µF ceramic output capacitor and operation within the specified input voltage (2.5V–6.5V) and temperature (–40°C to +85°C) ranges. Current limit is guaranteed at 310mA (min), allowing safe short-circuit operation without damage to MAX8559EBA11+T.
Does the MAX8559EBA11+T require external input or output capacitors?
Yes, the MAX8559EBA11+T requires external ceramic capacitors: a minimum 2.2µF input capacitor (shared between INA and INB) and a minimum 2.2µF output capacitor per channel (OUTA and OUTB). For full 300mA load capability across temperature, 4.7µF is recommended. Tantalum capacitors are not recommended due to ESR and stability concerns; X7R/X5R dielectrics are preferred for stable capacitance over temperature.
How does the thermal shutdown function in the MAX8559EBA11+T?
The MAX8559EBA11+T features independent thermal sensors per LDO with a +160°C trip point and 10°C hysteresis. When junction temperature exceeds +160°C, the affected LDO's pass transistor turns off until temperature falls to +150°C, then resumes regulation. This protects MAX8559EBA11+T during sustained overload or poor PCB thermal design while allowing graceful recovery-no latch-up or manual reset is needed.
MAX8559EBA11+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFBGA, CSPBGA
- 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):
- 1.85V, 1.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -, -
- 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-UCSP (2.02x1.02)
MAX8559EBA11+T FAQ
1.How can I place an order for MAX8559EBA11+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8559EBA11+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 MAX8559EBA11+T reliable?
The price and inventory of MAX8559EBA11+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8559EBA11+T is usually 5 days.
3.What payment methods are accepted for MAX8559EBA11+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8559EBA11+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8559EBA11+T?
MAX8559EBA11+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8559EBA11+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 MAX8559EBA11+T?
For technical support, including MAX8559EBA11+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8559EBA11+T requirements.
6.How does Aetrix verify that MAX8559EBA11+T is sourced from the original manufacturer or authorized distributors?
All MAX8559EBA11+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 MAX8559EBA11+T meets industry standards.
7.What is the process for return or replacement of MAX8559EBA11+T?
All MAX8559EBA11+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8559EBA11+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 MAX8559EBA11+T part is unused and in its original packaging.
Return procedure for MAX8559EBA11+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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