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Analog Devices Inc./Maxim Integrated MAX8559ETAKG
- Part No.:
- MAX8559ETAKG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX8559ETAKG.pdf
- Description:
- IC REG LINEAR DUAL LOW NOISE
- Quantity:
- Payment:
- Shipping:
Inventory:2,923
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Product details
Overview
The MAX8559ETAKG from Maxim Integrated is a dual, low-noise, low-dropout linear regulator delivering 300mA per channel with factory-preset outputs of 2.80V (OUTA) and 3.00V (OUTB), operating from 2.5V to 6.5V input. It features 32µVRMS output noise, 70dB PSRR at 10kHz, and 60mV dropout at 100mA - optimized for battery-powered portable electronics requiring tight voltage accuracy and minimal solution size.
For engineers reviewing the MAX8559ETAKG datasheet, MAX8559ETAKG pinout, MAX8559ETAKG application, or MAX8559ETAKG equivalent, key selection criteria include independent logic-controlled shutdown (SHDNA/SHDNB), ultra-low quiescent current (115µA per LDO), no-bypass-capacitor operation capability, and thermal/short-circuit protection in an 8-pin TDFN-EP package.
Technical Context
The MAX8559ETAKG integrates two independent P-channel MOSFET pass transistors (RDS(ON) ≈ 0.6Ω), enabling load-proportional dropout voltage and eliminating base-drive current loss typical of PNP-based regulators. Its internal 1.25V bandgap reference feeds error amplifiers that regulate each output via fixed internal feedback dividers - no external resistors required.
Each LDO includes 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 a low-pass filter that reduces output noise to ≤32µVRMS (100Hz–100kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.80V (OUTA) and 3.00V (OUTB), factory-preset - eliminates external resistor networks and ensures ±3% accuracy over -40°C to +85°C. |
| Max Output Current | 300mA per channel - supports high-current digital subsystems (e.g., RF transceivers, memory I/O) with 4.7µF ceramic output capacitors. |
| Dropout Voltage | 60mV at 100mA load - enables extended battery runtime by sustaining regulation down to VIN = VOUT + 60mV. |
| Output Noise | 32µVRMS (100Hz–100kHz, CBP = 0.01µF) - meets stringent noise requirements for ADC references and RF power amplifier bias rails. |
| PSRR | 70dB at 10kHz - suppresses switching noise from adjacent DC-DC converters in mixed-power-supply systems. |
| Quiescent Current | 115µA per LDO (no load) - minimizes standby power in always-on subsystems like real-time clocks or sensor interfaces. |
| Shutdown Current | 0.01µA (both SHDN inputs low) - enables deep-sleep modes in portable devices without auxiliary power switches. |
Pinout & Package
MAX8559ETAKG is packaged in an 8-pin TDFN-EP (3mm × 3mm × 0.8mm) with exposed paddle for thermal dissipation. The exposed pad must be soldered to PCB ground plane to achieve rated 1.95W power dissipation and thermal shutdown performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INA) | LDO A Input | Primary input for OUTA; shares common input rail with INB (Pin 4); requires ≥2.2µF ceramic bypass to GND. |
| 2 (SHDNA) | LDO A Shutdown Control | Active-low logic input; pulls OUTA to GND via 385Ω internal discharge path when low; connects to INA for always-on operation. |
| 3 (SHDNB) | LDO B Shutdown Control | Active-low logic input; independently disables OUTB; both SHDN pins low disable internal reference and reduce IQ to 0.01µA. |
| 4 (INB) | LDO B Input | Primary input for OUTB; electrically tied to INA; same 2.5V–6.5V range and bypassing requirements. |
| 5 (OUTB) | LDO B Output | Regulated 3.00V output sourcing up to 300mA; internally discharged to GND during shutdown. |
| 6 (GND) | Ground Reference | Common return for all circuitry; must be low-impedance connection to PCB ground plane, especially under high transient loads. |
| 7 (BP) | Noise Bypass | Reference voltage bypass node; 0.01µF ceramic capacitor here reduces output noise by filtering reference ripple. |
| 8 (OUTA) | LDO A Output | Regulated 2.80V output sourcing up to 300mA; internally discharged to GND during shutdown; matches OUTB in architecture and specs. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Enables separate power domains for core logic (2.80V) and I/O/peripherals (3.00V) without cross-talk or shared failure modes. |
| Independent shutdown control | Allows dynamic power gating of individual rails - e.g., disabling RF section (OUTB) while keeping MCU core (OUTA) active. |
| No-bypass-capacitor operation | Eliminates need for BP capacitor in noise-tolerant applications, reducing BOM count and PCB area by 1 passive component. |
| P-channel MOSFET pass devices | Delivers lower dropout and higher efficiency than PNP alternatives, especially at light loads, extending battery life in portable gear. |
| Thermal & short-circuit protection | Self-protecting operation prevents damage during overload or layout-induced thermal stress - no external foldback circuitry needed. |
Applications
| Mobile Baseband Power | Wireless LAN Module Supply |
|---|---|
Use Scenario: Powers baseband processor core (2.80V) and I/O interface (3.00V) in 3G/4G cellular handsets with dynamic voltage scaling. IC Role / Device Role / Timing Role: Dual-rail LDO providing clean, sequenced, and independently controllable voltages for SoC subsystems. Use Value: 32µVRMS noise ensures stable ADC/DAC performance; independent shutdown enables modem sleep states without resetting core logic. |
Use Scenario: Supplies 3.00V to WLAN chipset RF front-end and 2.80V to digital MAC/baseband in notebook Wi-Fi cards. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO pair decoupling noisy switch-mode supplies feeding RF and digital sections. Use Value: 70dB PSRR at 10kHz rejects DC-DC ripple; 60mV dropout extends operational time as battery discharges below 3.3V. |
| Digital Camera Sensor Bias | Handheld Instrument Analog Front-End |
Use Scenario: Provides 2.80V bias to CMOS image sensor analog block and 3.00V to ISP digital core in compact digital cameras. IC Role / Device Role / Timing Role: Precision dual-LDO delivering stable, low-noise rails critical for low-light image quality and color fidelity. Use Value: Factory-trimmed outputs eliminate calibration overhead; 32µVRMS noise prevents fixed-pattern noise in raw sensor data. |
Use Scenario: Powers 24-bit sigma-delta ADC reference (2.80V) and microcontroller (3.00V) in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Ultra-low-noise, high-accuracy voltage source ensuring measurement integrity across temperature and load variations. Use Value: ±3% output accuracy and <0.15%/V line regulation maintain reading stability despite battery voltage sag during measurement bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A202830DQNR | 2.8V/3.0V dual outputs; 300mA per channel; 25µVRMS noise; requires external BP capacitor; 50mV dropout at 100mA. | Lower noise but lacks independent shutdown control - both rails enable/disable simultaneously. | Select when lowest possible noise is critical and independent rail control is unnecessary. |
| NCP114AMX280TBG | Single 2.8V LDO (300mA); no dual-output or 3.0V option; 45µVRMS noise; 120mV dropout at 100mA; no BP pin. | Requires two separate ICs to replicate MAX8559ETAKG functionality - increases board area and BOM cost. | Select only if dual-rail integration is not required and space constraints allow discrete implementation. |
Compared with TPS7A202830DQNR and NCP114AMX280TBG, the MAX8559ETAKG uniquely delivers factory-set dual outputs with independent shutdown, ultra-low quiescent current (115µA/LDO), and no-BP-capacitor flexibility - making it optimal for space-constrained, battery-sensitive portable designs requiring granular power management.
Availability
MAX8559ETAKG is available at Aetrix Electronics and suitable for cellular handsets, wireless LAN modules, digital cameras, and handheld instruments requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX8559ETAKG 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding applications.
The MAX8559 belongs to Maxim's ultra-low-noise, dual-LDO product line designed specifically for battery-powered portable electronics where output accuracy, noise immunity, and power efficiency are critical system-level constraints.
FAQ
What output voltages does the MAX8559ETAKG provide?
The MAX8559ETAKG provides factory-preset outputs of 2.80V on OUTA and 3.00V on OUTB. These values are laser-trimmed during production and require no external feedback components. Output voltage accuracy is guaranteed at ±3% over the full -40°C to +85°C operating temperature range and load currents from 0.1mA to 300mA.
Does the MAX8559ETAKG require an external bypass capacitor on the BP pin?
The MAX8559ETAKG 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). If noise sensitivity is low, omitting the BP capacitor saves board space and BOM cost - a design flexibility unique to this regulator family.
How does the MAX8559ETAKG handle thermal overload?
The MAX8559ETAKG incorporates independent thermal sensors per LDO. When junction temperature exceeds +160°C, the affected regulator shuts down its pass transistor. After cooling by 10°C, it automatically resumes regulation. This pulsed operation prevents permanent damage during sustained overload or poor heatsinking - no external thermal management circuitry is needed.
Can the MAX8559ETAKG operate from a single input source for both LDOs?
Yes - the MAX8559ETAKG is designed for shared-input operation: INA (Pin 1) and INB (Pin 4) are intended to be connected to the same 2.5V–6.5V supply rail. This simplifies power routing and ensures matched input conditions for both regulators, supporting consistent transient response and dropout behavior across OUTA and OUTB.
What is the maximum continuous output current per channel for the MAX8559ETAKG?
The MAX8559ETAKG delivers up to 300mA continuously per channel (OUTA and OUTB) when used with ≥4.7µF ceramic output capacitors and proper thermal management. Its internal current limit is specified at 310mA (min), allowing safe operation into short circuits without damage - a key reliability feature for portable equipment.
MAX8559ETAKG 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):
- 2.8V, 3V
- 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:
- Current Limit, Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (3x3)
MAX8559ETAKG FAQ
1.How can I place an order for MAX8559ETAKG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8559ETAKG 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 MAX8559ETAKG reliable?
The price and inventory of MAX8559ETAKG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8559ETAKG is usually 5 days.
3.What payment methods are accepted for MAX8559ETAKG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8559ETAKG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8559ETAKG?
MAX8559ETAKG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8559ETAKG 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 MAX8559ETAKG?
For technical support, including MAX8559ETAKG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8559ETAKG requirements.
6.How does Aetrix verify that MAX8559ETAKG is sourced from the original manufacturer or authorized distributors?
All MAX8559ETAKG 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 MAX8559ETAKG meets industry standards.
7.What is the process for return or replacement of MAX8559ETAKG?
All MAX8559ETAKG units undergo pre-shipment inspection (PSI). If there is an issue with MAX8559ETAKG, 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 MAX8559ETAKG part is unused and in its original packaging.
Return procedure for MAX8559ETAKG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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