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Analog Devices Inc./Maxim Integrated MAX8559ETA22+T
- Part No.:
- MAX8559ETA22+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX8559ETA22+T.pdf
- Description:
- IC REG LINEAR 1.8V/1.8V 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,537
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Product details
Overview
MAX8559ETA22+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 1.8V outputs on both LDOs, 32µVRMS output noise, and 60mV dropout at 100mA load-designed for power rail splitting in portable digital cameras and wireless LAN cards.
For engineers reviewing the MAX8559ETA22+T datasheet, MAX8559ETA22+T pinout, MAX8559ETA22+T application, or MAX8559ETA22+T equivalent, key selection criteria include independent shutdown control, ultra-low quiescent current (115µA per LDO), thermal shutdown at +160°C, and compatibility with ceramic output capacitors down to 2.2µF for 150mA loads.
Technical Context
The MAX8559ETA22+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. Each LDO features dedicated SHDN inputs, autodischarge circuitry (385Ω pull-down), and separate current limiting (310mA min).
Its low-noise architecture uses a BP pin with 0.01µF bypass capacitor to filter reference noise, achieving 32µVRMS output noise (100Hz–100kHz) and 70dB PSRR at 10kHz. Thermal protection operates per-regulator with +160°C trip and 10°C hysteresis, allowing pulsed operation under sustained overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8V per channel (factory-preset, no external resistors required) |
| Max Output Current | 300mA per LDO-supports high-current digital core and I/O rails simultaneously |
| Dropout Voltage | 60mV at 100mA load-enables operation down to VIN = 1.86V for 1.8V output |
| Output Noise | 32µVRMS (100Hz–100kHz)-suitable for noise-sensitive RF and ADC power domains |
| PSRR | 70dB at 10kHz-rejects switching noise from adjacent DC/DC converters |
| Quiescent Current | 115µA per LDO at no load-extends battery life in always-on subsystems |
| Shutdown Current | 0.01µA when both SHDNA and SHDNB are low-enables deep-sleep modes |
Pinout & Package
MAX8559ETA22+T is packaged in an 8-pin TDFN-EP (3mm × 3mm, 0.8mm height) with exposed paddle for thermal dissipation. Pin 1 is marked by a "+" sign on lead-free packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INA) | LDO A Input | 2.5V–6.5V supply input; must be bypassed with ≥2.2µF ceramic capacitor to GND |
| 2 (SHDNA) | LDO A Shutdown Control | Logic-low disables OUTA; internal 385Ω discharge path pulls OUTA to GND during shutdown |
| 3 (SHDNB) | LDO B Shutdown Control | Logic-low disables OUTB; independent of SHDNA for flexible power sequencing |
| 4 (INB) | LDO B Input | Shared input with INA; connects internally to INA for single-supply operation |
| 5 (OUTB) | LDO B Output | 1.8V regulated output sourcing up to 300mA; requires ≥2.2µF ceramic output capacitor |
| 6 (GND) | Ground Reference | Common return for all circuits; exposed paddle must be soldered to PCB ground plane |
| 7 (BP) | Reference Bypass | Connects to 0.01µF low-leakage ceramic capacitor to reduce output voltage noise |
| 8 (OUTA) | LDO A Output | 1.8V regulated output sourcing up to 300mA; identical specs and layout requirements as OUTB |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Enables split-rail power delivery (e.g., 1.8V core + 1.8V I/O) with separate enable control and fault isolation |
| No-bypass-capacitor operation | Stable with only input/output ceramics-eliminates large tantalum or electrolytic capacitors for space-constrained designs |
| P-channel MOSFET pass devices | Delivers lower dropout than PNP-based regulators and eliminates base-drive current loss, improving light-load efficiency |
| Channel-to-channel isolation | ≥60dB isolation above 10kHz prevents crosstalk between sensitive analog and noisy digital rails |
| Thermal shutdown with hysteresis | +160°C trip with 10°C hysteresis enables safe, self-recovering operation under continuous overload |
Applications
| Wireless LAN Cards | Digital Cameras |
|---|---|
|
Use Scenario: Powering WLAN baseband processor and RF transceiver from a single Li-ion cell. IC Role / Device Role / Timing Role: Dual LDO provides isolated 1.8V supplies for digital baseband (OUTA) and RF front-end (OUTB), each independently shut down during sleep modes. Use Value: 32µVRMS noise ensures clean RF synthesizer VCO supply; 60mV dropout extends usable battery range to 2.0V input. |
Use Scenario: Supplying image sensor interface and ISP core in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: Delivers tightly regulated 1.8V to high-speed MIPI CSI-2 interface (OUTA) and low-noise ISP logic (OUTB) with independent sequencing. Use Value: 70dB PSRR suppresses noise from camera flash LED drivers; 115µA quiescent current minimizes standby drain. |
| PCMCIA Cards | Handheld Instruments |
|
Use Scenario: Regulating 1.8V I/O and 1.8V core voltages in legacy PCMCIA memory or modem cards. IC Role / Device Role / Timing Role: Replaces discrete LDO pairs with integrated solution-reducing footprint by >40% while maintaining rail independence. Use Value: 8-pin TDFN package (3mm × 3mm) fits tight card-edge layouts; exposed paddle enables 1.95W power dissipation at +70°C ambient. |
Use Scenario: Powering microcontroller, display driver, and precision ADC in battery-operated handheld test equipment. IC Role / Device Role / Timing Role: Supplies clean 1.8V to ADC reference domain (OUTA) and 1.8V to MCU core (OUTB), with SHDNB used for display backlight control. Use Value: 300mA per channel supports burst-mode MCU operation; thermal shutdown prevents damage during probe short-circuits. |
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, 300mA, 1.8V fixed; no dual-channel or independent shutdown | Requires two devices for dual-rail use; lacks BP pin for ultra-low-noise optimization | Select when only one 1.8V rail is needed and board area allows dual placement |
| ADP151ACBZ-1.8-R7 | Single 150mA LDO; 9µVRMS noise, but no second channel or shutdown control | Cannot replace dual functionality; limited current headroom for burst loads | Choose only for ultra-low-noise single-rail applications where 150mA suffices |
Compared with TPS7A202828PDBVR and ADP151ACBZ-1.8-R7, the MAX8559ETA22+T uniquely delivers matched 1.8V dual outputs with independent shutdown, 300mA per channel, and BP-enabled 32µVRMS noise-making it the only drop-in solution for space-constrained dual-rail portable systems requiring coordinated power control.
Availability
MAX8559ETA22+T is available at Aetrix Electronics and suitable for digital cameras, wireless LAN cards, PCMCIA modules, handheld instruments, and notebook computer sub-systems requiring stable component supply across industrial temperature range (-40°C to +85°C).
Supply support for MAX8559ETA22+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 portable applications.
The MAX8559 belongs to Maxim's low-noise LDO family targeting battery-powered systems where dual independent rails, minimal quiescent current, and ultra-low output noise are critical-such as imaging, RF, and portable instrumentation.
FAQ
What output voltage does the MAX8559ETA22+T deliver?
The MAX8559ETA22+T delivers factory-preset 1.8V on both OUTA and OUTB channels. This fixed output eliminates external resistor networks and ensures ±3% accuracy over -40°C to +85°C and 0.1mA–300mA load range. The "22" in the part number explicitly denotes the 1.8V/1.8V configuration per Maxim's Output Voltage Selector Guide.
Does the MAX8559ETA22+T require an external bypass capacitor on the BP pin?
Yes-the MAX8559ETA22+T requires a 0.01µF low-leakage ceramic capacitor between BP and GND to achieve its specified 32µVRMS output noise. Omitting this capacitor increases noise to 254µVRMS. The BP capacitor forms a low-pass filter with an internal resistor, directly reducing reference noise coupling to both outputs.
Can the MAX8559ETA22+T operate without output capacitors?
No-the MAX8559ETA22+T requires minimum 2.2µF ceramic output capacitors on both OUTA and OUTB for stability. For 300mA loads, 4.7µF is recommended. Operation without output capacitors risks oscillation and violates the Absolute Maximum Ratings for output short-circuit duration, which assumes proper capacitive loading per the Capacitor Selection guidelines.
What is the thermal performance difference between the UCSP and TDFN packages for the MAX8559ETA22+T?
The MAX8559ETA22+T uses the TDFN-EP package, rated for 1951mW continuous power dissipation at +70°C (derating 24.4mW/°C above). In contrast, the UCSP variant (e.g., MAX8559EBA22+T) is limited to 379mW. The TDFN's exposed paddle soldered to PCB ground provides superior thermal conduction-critical for dual 300mA operation at elevated ambient temperatures.
How does the MAX8559ETA22+T handle overcurrent conditions?
The MAX8559ETA22+T incorporates two independent current limiters-one per LDO-that clamp output current at 310mA (min) by regulating the P-channel MOSFET gate voltage. Outputs can be shorted to GND continuously without damage. During overload, the device maintains regulation until thermal shutdown activates at +160°C junction temperature, then cycles on/off with 10°C hysteresis.
MAX8559ETA22+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:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 1.8V, 1.8V
- 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-TDFN (3x3)
MAX8559ETA22+T FAQ
1.How can I place an order for MAX8559ETA22+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8559ETA22+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 MAX8559ETA22+T reliable?
The price and inventory of MAX8559ETA22+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8559ETA22+T is usually 5 days.
3.What payment methods are accepted for MAX8559ETA22+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8559ETA22+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8559ETA22+T?
MAX8559ETA22+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8559ETA22+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 MAX8559ETA22+T?
For technical support, including MAX8559ETA22+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8559ETA22+T requirements.
6.How does Aetrix verify that MAX8559ETA22+T is sourced from the original manufacturer or authorized distributors?
All MAX8559ETA22+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 MAX8559ETA22+T meets industry standards.
7.What is the process for return or replacement of MAX8559ETA22+T?
All MAX8559ETA22+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8559ETA22+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 MAX8559ETA22+T part is unused and in its original packaging.
Return procedure for MAX8559ETA22+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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