My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8559ETA18+T
- Part No.:
- MAX8559ETA18+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX8559ETA18+T.pdf
- Description:
- IC REG LINEAR 1.8V/1.8V 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX8559ETA18+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/3.0V outputs, 32µVRMS output noise, and 60mV dropout at 100mA - used in notebook computers and wireless LAN cards for clean, independent power rail generation.
For engineers reviewing the MAX8559ETA18+T datasheet, MAX8559ETA18+T pinout, MAX8559ETA18+T application, or MAX8559ETA18+T equivalent, key selection criteria include dual independent shutdown control, ultra-low quiescent current (115µA per LDO), thermal/short-circuit protection, and compatibility with small ceramic capacitors without mandatory bypass.
Technical Context
The MAX8559ETA18+T integrates two independent P-channel MOSFET pass transistors (0.6Ω RDS(ON)) with internal 1.25V bandgap reference and error amplifiers, enabling load-proportional dropout voltage and eliminating base-drive current loss typical of PNP-based regulators. Each LDO features autodischarge via 385Ω internal resistor during shutdown.
Its feedback loop uses internal resistor dividers to set fixed 1.8V and 3.0V outputs; BP pin accepts a 0.01µF capacitor to form a lowpass filter that reduces broadband noise to ≤32µVRMS (100Hz–100kHz). PSRR reaches 70dB at 10kHz with CBP = 0.01µF and COUT = 2.2µF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8V (OUTA), 3.0V (OUTB) - factory-preset, no external resistors required |
| Max Output Current | 300mA per channel - supports high-current digital subsystems with single 4.7µF output capacitor |
| Dropout Voltage | 60mV at 100mA - enables operation down to VIN = VOUT + 60mV, extending battery runtime |
| Output Noise | 32µVRMS (100Hz–100kHz) - meets low-noise analog/RF supply requirements without ferrite beads |
| PSRR | 70dB at 10kHz - suppresses switching noise from adjacent DC-DC converters |
| Quiescent Current | 115µA per LDO (no load) - minimizes standby power in always-on subsystems |
| Shutdown Current | 0.01µA (both LDOs off) - enables deep-sleep modes in portable devices |
Pinout & Package
MAX8559ETA18+T is housed in an 8-pin TDFN-EP package (3mm × 3mm, 0.8mm height) with exposed paddle for thermal dissipation. The lead-free package complies with RoHS and requires soldering to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 INA | LDO A Input | 2.5V–6.5V 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 during shutdown |
| 3 SHDNB | Shutdown B Control | Logic-low disables OUTB; independent of SHDNA for asymmetric power sequencing |
| 4 INB | LDO B Input | 2.5V–6.5V supply input for OUTB; electrically tied to INA in most designs |
| 5 OUTB | LDO B Output | 3.0V regulated output sourcing up to 300mA; requires ≥2.2µF ceramic capacitor to GND |
| 6 GND | Ground Reference | Common return path for both LDOs and BP bypass; connects to exposed paddle |
| 7 BP | Noise Bypass | Accepts 0.01µF ceramic capacitor to reduce output noise; trace routing must avoid noisy signals |
| 8 OUTA | LDO A Output | 1.8V regulated output sourcing up to 300mA; internally discharged during SHDNA assertion |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent shutdown | SHDNA/SHDNB allow staggered enable/disable of 1.8V and 3.0V rails without external logic |
| Low-noise regulation | 32µVRMS output noise with 0.01µF BP capacitor - eliminates need for post-LDO LC filtering |
| P-channel MOSFET pass device | 0.6Ω RDS(ON) enables 60mV dropout at 100mA and eliminates base-drive current loss |
| Thermal & short-circuit protection | Auto-shutdown at +160°C junction temperature with 10°C hysteresis; continuous short-circuit safe |
| Ceramic capacitor compatibility | Stable with 2.2µF–10µF X7R/X5R ceramics; no tantalum or electrolytic capacitors required |
Applications
| Wireless LAN Cards | Notebook Computers |
|---|---|
|
Use Scenario: Powering 802.11a/b/g RF transceivers and baseband processors requiring isolated, low-noise 1.8V I/O and 3.0V analog supplies. IC Role / Device Role / Timing Role: Dual LDO provides independent, sequenced 1.8V and 3.0V rails with simultaneous or staggered activation via SHDNA/SHDNB. Use Value: 32µVRMS noise prevents RX sensitivity degradation; 60mV dropout extends usable battery range by >150mV per cell. |
Use Scenario: Supplying core logic (1.8V) and display interface (3.0V) in space-constrained motherboard VRM sections. IC Role / Device Role / Timing Role: Replaces discrete LDOs with single 3mm×3mm TDFN footprint, reducing PCB area by 40% versus dual-SOT23 solution. Use Value: 115µA quiescent current per LDO cuts standby power by >50% vs. legacy bipolar LDOs; exposed paddle enables 1.95W dissipation. |
| Digital Cameras | Handheld Instruments |
|
Use Scenario: Delivering clean power to CMOS image sensors (1.8V) and ISP processors (3.0V) during burst capture mode. IC Role / Device Role / Timing Role: Dual LDO handles dynamic load steps up to 300mA with <15mV transient overshoot (10µA→100mA step). Use Value: 70dB PSRR at 10kHz rejects noise from high-frequency DC-DC converters powering other camera subsystems. |
Use Scenario: Providing stable 1.8V microcontroller core and 3.0V precision ADC reference in battery-operated test equipment. IC Role / Device Role / Timing Role: Independent shutdown allows MCU to disable ADC rail during sleep while retaining real-time clock supply. Use Value: Factory-preset outputs eliminate trimming resistors; ±2% output accuracy over -40°C to +85°C ensures measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2033PDQNR | Single 3.3V LDO (not dual); 300mA, 12µVRMS noise, 170mV dropout at 300mA | Cannot replace dual-rail function; requires two devices for 1.8V/3.0V | Select when only one rail is needed and ultra-low noise is critical |
| ADP151ACBZ-1.8-R7 | Single 1.8V LDO; 200mA, 9µVRMS noise, 150mV dropout at 200mA; no shutdown control | Lacks dual output, independent shutdown, and 3.0V rail | Use only for point-of-load 1.8V regulation where size and noise are paramount |
Compared with MAX8559ETA18+T, the TPS7A2033PDQNR offers lower noise but cannot replicate dual independent rail control, while ADP151ACBZ-1.8-R7 achieves superior noise performance at the cost of missing key functionality - making MAX8559ETA18+T uniquely suited for compact dual-rail battery-powered systems.
Availability
MAX8559ETA18+T is available at Aetrix Electronics and suitable for notebook computers, wireless LAN cards, digital cameras, and handheld instruments requiring stable component supply across industrial temperature range (-40°C to +85°C).
Supply support for MAX8559ETA18+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, computing, and communications applications.
The MAX8559 belongs to Maxim's low-noise LDO family engineered for battery-powered portable electronics, emphasizing minimal quiescent current, dual independent control, and ceramic-capacitor compatibility in miniature packages.
FAQ
What output voltages does the MAX8559ETA18+T provide?
The MAX8559ETA18+T delivers factory-preset 1.8V on OUTA and 3.0V on OUTB. These values are laser-trimmed during production and require no external feedback resistors. The "18" in the part number denotes the 1.8V/3.0V combination per Maxim's Output Voltage Selector Guide, and the "+T" suffix confirms lead-free packaging.
Can the MAX8559ETA18+T operate without the BP bypass capacitor?
Yes, the MAX8559ETA18+T functions without the 0.01µF BP capacitor, but output noise increases from 32µVRMS to 254µVRMS (100Hz–100kHz). The BP pin is optional for cost- or space-constrained designs where noise sensitivity is low; omitting it reduces total solution size but sacrifices low-noise performance critical for RF or precision analog circuits.
What is the maximum power dissipation capability of the MAX8559ETA18+T package?
The MAX8559ETA18+T in 8-pin TDFN-EP package supports 1951mW continuous power dissipation at +70°C ambient, derating by 24.4mW/°C above that temperature. This rating assumes proper soldering of the exposed paddle to the PCB ground plane; failure to connect the paddle reduces thermal performance significantly and may trigger thermal shutdown under full load.
How does the MAX8559ETA18+T handle short-circuit conditions?
The MAX8559ETA18+T incorporates independent current limiters per LDO that clamp output current at 310mA (min) and allow indefinite short-circuit operation without damage. During overload, the device enters constant-current mode while maintaining thermal shutdown protection (trip at +160°C, 10°C hysteresis), ensuring robustness in fault-prone embedded environments.
Is the MAX8559ETA18+T compatible with ceramic output capacitors?
Yes, the MAX8559ETA18+T is fully optimized for ceramic output capacitors ranging from 2.2µF to 10µF using X7R or X5R dielectrics. Stability is guaranteed across -40°C to +85°C with ≥4.7µF for 300mA loads. Tantalum capacitors are explicitly not recommended due to ESR and reliability concerns outlined in the Applications Information section.
MAX8559ETA18+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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)
MAX8559ETA18+T FAQ
1.How can I place an order for MAX8559ETA18+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8559ETA18+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 MAX8559ETA18+T reliable?
The price and inventory of MAX8559ETA18+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8559ETA18+T is usually 5 days.
3.What payment methods are accepted for MAX8559ETA18+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8559ETA18+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8559ETA18+T?
MAX8559ETA18+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8559ETA18+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 MAX8559ETA18+T?
For technical support, including MAX8559ETA18+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8559ETA18+T requirements.
6.How does Aetrix verify that MAX8559ETA18+T is sourced from the original manufacturer or authorized distributors?
All MAX8559ETA18+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 MAX8559ETA18+T meets industry standards.
7.What is the process for return or replacement of MAX8559ETA18+T?
All MAX8559ETA18+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8559ETA18+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 MAX8559ETA18+T part is unused and in its original packaging.
Return procedure for MAX8559ETA18+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8559ETA18+T Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
