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Analog Devices Inc./Maxim Integrated MAX8559ETAG2+
- Part No.:
- MAX8559ETAG2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX8559ETAG2+.pdf
- Description:
- IC REG LINEAR DUAL LOW NOISE
- Quantity:
- Payment:
- Shipping:
Inventory:2,706
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Product details
Overview
The MAX8559ETAG2+ 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 outputs of 3.0V (OUTA) and 1.8V (OUTB), 32µVRMS output noise, 70dB PSRR at 10kHz, and 60mV dropout at 100mA - used in space-constrained portable electronics requiring clean, independent power rails.
For engineers reviewing the MAX8559ETAG2+ datasheet, MAX8559ETAG2+ pinout, MAX8559ETAG2+ application, or MAX8559ETAG2+ equivalent, key selection considerations include dual independent shutdown control, UCSP/TDFN package compatibility, low-quiescent-current operation (115µA per LDO), and capacitor-free bypass capability for minimal footprint designs.
Technical Context
The MAX8559ETAG2+ integrates two independent P-channel MOSFET pass transistors (RDS(ON) ≈ 0.6Ω) enabling load-proportional dropout voltage and eliminating base-drive current losses typical of PNP-based regulators. Each LDO features its own error amplifier, 1.25V bandgap reference, and internal feedback divider.
It supports independent logic-controlled shutdown (SHDNA/SHDNB), internal 385Ω discharge path per output during shutdown, thermal shutdown at +160°C with 10°C hysteresis, and operates without mandatory BP bypass capacitor - though 0.01µF at BP reduces output noise to ≤32µVRMS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V (OUTA), 1.8V (OUTB); factory-preset, no external resistors required |
| Max Output Current | 300mA per channel; sustained delivery with ≥4.7µF ceramic output capacitor |
| Dropout Voltage | 60mV at 100mA load; enables extended battery runtime near end-of-discharge |
| Output Noise | 32µVRMS (100Hz–100kHz); achieved with 0.01µF BP capacitor and 10µF COUT |
| PSRR | 70dB at 10kHz; suppresses switching noise from upstream DC-DC converters |
| Quiescent Current | 115µA per LDO at no load; independent of dropout voltage and load current |
| Input Voltage Range | 2.5V to 6.5V; compatible with single-cell Li-ion, Li-polymer, and multi-cell alkaline systems |
Pinout & Package
MAX8559ETAG2+ is available in an 8-pin TDFN-EP (3mm × 3mm, 0.8mm height) with exposed paddle, rated for 1.95W power dissipation. Pin numbering follows standard TDFN top-view orientation with Pin 1 marked by "+" on lead-free packages.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INA) | LDO A Input | Main supply input for OUTA; must be bypassed with ≥2.2µF ceramic capacitor to GND |
| 2 (SHDNA) | Shutdown A Control | Logic-low disables OUTA; internal 385Ω discharge path pulls OUTA to GND |
| 3 (SHDNB) | Shutdown B Control | Logic-low disables OUTB; independent of SHDNA for flexible rail sequencing |
| 4 (INB) | LDO B Input | Main supply input for OUTB; electrically tied to INA in most applications |
| 5 (OUTB) | LDO B Output | Delivers regulated 1.8V up to 300mA; requires local ceramic output capacitor |
| 6 (GND) | Ground Reference | Common return for both LDOs and BP; must connect to low-impedance ground plane |
| 7 (BP) | Noise Bypass Terminal | Connects to 0.01µF ceramic capacitor to reduce output voltage noise across both rails |
| 8 (OUTA) | LDO A Output | Delivers regulated 3.0V up to 300mA; internally discharged during SHDNA assertion |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent shutdown | Enables selective power gating of 3.0V and 1.8V rails without affecting each other's regulation or reference |
| P-channel MOSFET pass devices | Eliminates base-drive current loss; achieves ultra-low IQ (115µA/LDO) and load-dependent dropout |
| No mandatory BP capacitor | Reduces BOM count and PCB area - optional 0.01µF BP cap trades startup time for 32µVRMS noise performance |
| Thermal and short-circuit protection | Auto-recovering shutdown at +160°C junction temperature; continuous short-circuit tolerance per output |
| Ceramic capacitor optimized | Stable with 2.2µF (≤150mA) or 4.7µF (≤300mA) X5R/X7R ceramics; no tantalum required |
Applications
| Mobile Baseband Power | Digital Camera Sensor Bias |
|---|---|
|
Use Scenario: Powering baseband processor core (1.8V) and I/O (3.0V) in 3G/4G smartphones with tight noise and transient response requirements. IC Role / Device Role / Timing Role: Dual-rail LDO providing isolated, low-noise supplies with independent enable control for power sequencing. Use Value: 32µVRMS noise and 70dB PSRR prevent RF desense; 60mV dropout extends usable battery range by ~150mV per cell. |
Use Scenario: Supplying image sensor analog front-end (1.8V) and digital interface (3.0V) in compact digital cameras. IC Role / Device Role / Timing Role: Low-noise dual LDO delivering stable bias rails with fast load-transient recovery (<15mV overshoot). Use Value: Independent shutdown allows sensor sleep mode (OUTB off) while keeping interface active (OUTA on), reducing system standby current. |
| Wireless LAN Module | Handheld Test Instrument |
|
Use Scenario: Powering WLAN SoC RF section (1.8V) and host interface (3.0V) in mini-PCIe or M.2 modules. IC Role / Device Role / Timing Role: Dual LDO with high PSRR rejecting noise from shared DC-DC converter and enabling clean RF bias. Use Value: 70dB PSRR at 10kHz suppresses switching ripple from 1MHz buck converters; TDFN package fits 12mm × 12mm module footprints. |
Use Scenario: Providing precision analog supply (1.8V) and microcontroller rail (3.0V) in battery-powered handheld DMMs or signal generators. IC Role / Device Role / Timing Role: Low-drift, low-noise dual regulator supporting ADC reference stability and MCU real-time operation. Use Value: ±2% output accuracy over -40°C to +85°C ensures measurement repeatability; 115µA IQ extends battery life beyond 100 hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A202818PDBVR | 300mA dual LDO with 1.8V/2.8V outputs; higher IQ (25µA vs. 115µA/LDO); no BP pin or thermal shutdown | Lacks independent shutdown and thermal protection; unsuitable for high-reliability portable systems | Select when ultra-low IQ dominates over fault protection and noise performance |
| RT9013-3018 | 300mA dual LDO with 1.8V/3.0V outputs; 120mV dropout at 100mA; 45µVRMS noise; no BP pin | Higher dropout and noise limit use in noise-sensitive RF or precision analog circuits | Select for cost-sensitive consumer applications where 32µVRMS noise and 60mV dropout are noncritical |
Compared with TPS7A202818PDBVR and RT9013-3018, the MAX8559ETAG2+ uniquely delivers 32µVRMS noise, 60mV dropout, independent shutdown, and thermal protection in a single 3mm × 3mm TDFN - making it optimal for battery-powered RF and precision analog systems demanding reliability and spectral purity.
Availability
MAX8559ETAG2+ is available at Aetrix Electronics and suitable for mobile baseband power, digital camera sensor bias, wireless LAN modules, and handheld test instruments requiring stable component supply across industrial temperature range (-40°C to +85°C).
Supply support for MAX8559ETAG2+ 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 applications in communications, computing, and industrial systems.
The MAX8559ETAG2+ belongs to Maxim's low-noise, dual-LDO product line engineered specifically for battery-powered portable electronics needing independent, sequenced, and ultra-clean power rails.
FAQ
What output voltages does the MAX8559ETAG2+ provide?
The MAX8559ETAG2+ provides factory-preset outputs of 3.0V on OUTA and 1.8V on OUTB. These values are laser-trimmed during production and require no external feedback resistors. The "G2" suffix in MAX8559ETAG2+ explicitly denotes this 3.0V/1.8V configuration per Maxim's Output Voltage Selector Guide.
Does the MAX8559ETAG2+ require an external bypass capacitor on the BP pin?
No, the MAX8559ETAG2+ operates stably without the BP capacitor. However, adding a 0.01µF ceramic capacitor between BP and GND reduces output voltage noise to ≤32µVRMS (100Hz–100kHz). Omitting it increases noise to ~254µVRMS but saves board space and BOM cost - a deliberate trade-off supported by the device's architecture.
What is the maximum continuous output current per channel for the MAX8559ETAG2+?
The MAX8559ETAG2+ delivers up to 300mA continuously per channel (OUTA and OUTB) when using a minimum 4.7µF ceramic output capacitor. At 150mA loads, a 2.2µF capacitor suffices. The device includes independent current limiting (310mA min) and thermal shutdown to protect against overload conditions.
How does the MAX8559ETAG2+ achieve low dropout voltage?
The MAX8559ETAG2+ uses internal P-channel MOSFET pass transistors (RDS(ON) ≈ 0.6Ω) instead of PNP bipolar transistors. This architecture makes dropout voltage proportional to load current - resulting in just 60mV at 100mA - and eliminates base-drive current losses, enabling ultra-low quiescent current (115µA per LDO) even in dropout.
Can the MAX8559ETAG2+ operate from a single-cell Li-ion battery?
Yes, the MAX8559ETAG2+ operates from 2.5V to 6.5V input, covering the full discharge curve of a single-cell Li-ion (typically 4.2V–2.7V). Its 60mV dropout at 100mA allows usable operation down to ~2.76V for the 2.85V output variants, and the 3.0V/1.8V configuration in MAX8559ETAG2+ remains functional until ~2.7V input - maximizing battery energy utilization.
MAX8559ETAG2+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 3V, 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 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)
MAX8559ETAG2+ FAQ
1.How can I place an order for MAX8559ETAG2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8559ETAG2+ 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 MAX8559ETAG2+ reliable?
The price and inventory of MAX8559ETAG2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8559ETAG2+ is usually 5 days.
3.What payment methods are accepted for MAX8559ETAG2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8559ETAG2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8559ETAG2+?
MAX8559ETAG2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8559ETAG2+ 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 MAX8559ETAG2+?
For technical support, including MAX8559ETAG2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8559ETAG2+ requirements.
6.How does Aetrix verify that MAX8559ETAG2+ is sourced from the original manufacturer or authorized distributors?
All MAX8559ETAG2+ 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 MAX8559ETAG2+ meets industry standards.
7.What is the process for return or replacement of MAX8559ETAG2+?
All MAX8559ETAG2+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8559ETAG2+, 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 MAX8559ETAG2+ part is unused and in its original packaging.
Return procedure for MAX8559ETAG2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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