My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8559ETA11+T
- Part No.:
- MAX8559ETA11+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX8559ETA11+T.pdf
- Description:
- IC REG LINEAR 1.85V/1.85V 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:40,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX8559ETA11+T from Maxim Integrated is a dual, low-noise, low-dropout linear regulator delivering two independent 300mA LDO outputs with factory-preset 1.85V on both channels, operating from 2.5V to 6.5V input. It features 32µVRMS output noise, 60mV dropout at 100mA, and 70dB PSRR at 10kHz-designed for noise-sensitive RF and analog power rails in portable electronics.
For engineers reviewing the MAX8559ETA11+T datasheet, MAX8559ETA11+T pinout, MAX8559ETA11+T application, or MAX8559ETA11+T equivalent, key selection criteria include dual independent shutdown control, ultra-low quiescent current (115µA per LDO), no-bypass-capacitor operation capability, and TDFN-EP thermal performance for space-constrained battery-powered designs.
Technical Context
The MAX8559ETA11+T integrates two P-channel MOSFET pass transistors (0.6Ω RDS(ON)) 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 drive each pass transistor gate via feedback from internal resistor dividers preset for 1.85V outputs.
Each LDO includes independent overcurrent 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 an RC filter that reduces output noise below 32µVRMS (100Hz–100kHz).
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-supports dual-core processors or RF/analog subsystems without derating |
| Dropout Voltage | 60mV at 100mA-enables >98% efficiency at light loads and extends usable battery life near end-of-discharge |
| Output Noise | 32µVRMS (100Hz–100kHz)-meets stringent noise requirements for ADC references and VCO supplies |
| PSRR | 70dB at 10kHz-rejects switching noise from adjacent DC/DC converters in mixed-signal systems |
| Quiescent Current | 115µA per LDO (independent of load)-ensures <230µA total system standby current with both outputs active |
| Input Voltage Range | 2.5V to 6.5V-compatible with single-cell Li-ion (2.7–4.2V), Li-polymer, and 3.3V/5V rail inputs |
Pinout & Package
MAX8559ETA11+T is housed in an 8-pin TDFN-EP package (3mm × 3mm × 0.8mm) with exposed paddle for enhanced thermal dissipation (1951mW max power at +70°C). The exposed pad must be soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 INA | LDO A Input | Primary input for regulator A; shares common input node with INB; requires 2.2µF ceramic bypass to GND |
| 2 SHDNA | Shutdown A Control | Logic-level input (VIH ≥1.6V, VIL ≤0.4V); drives OUTA into high-impedance state and activates 385Ω discharge path |
| 3 SHDNB | Shutdown B Control | Independent logic-level input for regulator B; enables selective power gating of dual-rail systems |
| 4 INB | LDO B Input | Primary input for regulator B; electrically tied to INA; same bypassing requirements |
| 5 OUTB | LDO B Output | Regulated 1.85V output sourcing up to 300mA; internally discharged to GND via 385Ω in shutdown |
| 6 GND | Ground Reference | Common return for all circuitry; connects to exposed paddle for optimal thermal and noise performance |
| 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 1.85V output sourcing up to 300mA; identical behavior and discharge path as OUTB |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent shutdown | Enables granular power sequencing-e.g., keep RF LDO active while shutting down baseband LDO during sleep mode |
| No-bypass-capacitor operation | Eliminates need for BP capacitor in non-critical noise applications, reducing BOM count and PCB area by 1 passive component |
| P-channel MOSFET pass devices | Delivers lower dropout than PNP alternatives at heavy loads and eliminates base-drive current loss, extending battery runtime |
| Thermal overload protection | Auto-cycles individual LDOs (not entire IC) when junction exceeds +160°C, preserving partial system functionality during fault conditions |
| Small ceramic output capacitors | Stable with 2.2µF (≤150mA) or 4.7µF (≤300mA) X7R/X5R ceramics-avoids costly tantalum and simplifies supply chain |
Applications
| Cellular Handsets | Digital Cameras |
|---|---|
Use Scenario: Powering RF transceiver and baseband processor cores from a single Li-ion cell. IC Role / Device Role / Timing Role: Dual LDO provides isolated, low-noise 1.85V rails-one for sensitive RF VCO/PA biasing, one for digital core logic. Use Value: 32µVRMS noise prevents phase noise degradation in transmit chains; independent shutdown cuts standby current to <1µA when camera is idle. | Use Scenario: Supplying image sensor analog front-end and ISP core in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: Regulator A powers noise-critical sensor bias, Regulator B powers digital ISP block with dynamic load switching. Use Value: 70dB PSRR at 10kHz suppresses switching noise from DC/DC converters driving flash LEDs; 60mV dropout preserves headroom as battery discharges. |
| Notebook Subsystems | Wireless LAN Cards |
Use Scenario: Generating auxiliary 1.85V rails for PCIe interface logic and embedded controller in ultrabooks. IC Role / Device Role / Timing Role: Provides tightly regulated, fast-transient-response power for high-speed serial link receivers. Use Value: Load-transient response limits voltage dip to <15mV during 10µA→100mA steps-prevents PCIe link training failures. | Use Scenario: Powering 802.11a/b/g/n radio ICs and MAC processors on mini-PCIe WLAN modules. IC Role / Device Role / Timing Role: Dual LDO decouples analog RF and digital MAC domains to prevent coupling-induced packet errors. Use Value: Channel-to-channel isolation >60dB above 1MHz ensures clean RF receive sensitivity despite digital switching noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A202825PDBVR | Single-output (2.8V/2.5V), 300mA, 16µVRMS noise, 1.4V–6.0V input | Requires two devices for dual-rail; lacks independent shutdown; smaller 2mm × 2mm WSON package | Choose when only one rail is needed or board space is more constrained than functional flexibility |
| ADP151AUJZ-1.8-R7 | Single 1.8V, 200mA LDO, 9µVRMS noise, 2.2V–5.5V input, no shutdown pin | Lower current and noise, but no dual output or control logic-requires discrete enable circuitry | Prefer for ultra-low-noise single-rail analog supplies where dual regulation is unnecessary |
Compared with TPS7A202825PDBVR and ADP151AUJZ-1.8-R7, the MAX8559ETA11+T uniquely delivers matched dual 1.85V outputs with independent shutdown, full 300mA capability per rail, and integrated thermal/current protection-making it optimal for space-limited, multi-rail portable systems requiring coordinated power management.
Availability
MAX8559ETA11+T is available at Aetrix Electronics and suitable for cellular handsets, digital cameras, notebook subsystems, and wireless LAN cards requiring stable component supply across extended production lifecycles.
Supply support for MAX8559ETA11+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 engineered specifically for battery-powered consumer electronics-prioritizing ultra-low quiescent current, minimal dropout, and sub-50µVRMS noise in miniature packages.
FAQ
What output voltage does the MAX8559ETA11+T provide?
The MAX8559ETA11+T delivers two identical, factory-preset 1.85V outputs (VOUTA = VOUTB = 1.85V). This fixed voltage is laser-trimmed during production and requires no external resistors. The "11" in the part number directly corresponds to the 1.85V/1.85V configuration per the Output Voltage Selector Guide in the datasheet.
Does the MAX8559ETA11+T require an external bypass capacitor on the BP pin?
The MAX8559ETA11+T does not require the 0.01µF BP capacitor for basic operation, but omitting it increases output noise from 32µVRMS to 254µVRMS. Use the BP capacitor when powering noise-sensitive circuits like VCOs or high-resolution ADCs; omit it only when board space or cost constraints outweigh noise performance needs.
How does the MAX8559ETA11+T handle thermal overload?
The MAX8559ETA11+T features independent thermal sensors per LDO. If either regulator's junction temperature exceeds +160°C, only that channel shuts down while the other remains operational. After cooling by 10°C, the affected LDO automatically resumes regulation-enabling graceful degradation rather than total system failure during sustained overload.
Can the MAX8559ETA11+T operate without output capacitors?
No-the MAX8559ETA11+T requires minimum 2.2µF ceramic output capacitors (X7R/X5R dielectric) on both OUTA and OUTB for stability across temperature and load. For full 300mA operation, 4.7µF is mandatory. Omitting output capacitors risks oscillation, excessive noise, and load-transient instability per the Capacitor Selection guidelines.
What is the maximum power dissipation of the MAX8559ETA11+T in its TDFN package?
The MAX8559ETA11+T in the 8-pin TDFN-EP package has a maximum continuous power dissipation of 1951mW at +70°C ambient, derating at 24.4mW/°C above that temperature. This rating assumes proper soldering of the exposed paddle to a large PCB ground plane; insufficient thermal relief reduces safe operating area significantly.
MAX8559ETA11+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):
- 1.85V, 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-TDFN (3x3)
MAX8559ETA11+T FAQ
1.How can I place an order for MAX8559ETA11+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8559ETA11+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 MAX8559ETA11+T reliable?
The price and inventory of MAX8559ETA11+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8559ETA11+T is usually 5 days.
3.What payment methods are accepted for MAX8559ETA11+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8559ETA11+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8559ETA11+T?
MAX8559ETA11+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8559ETA11+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 MAX8559ETA11+T?
For technical support, including MAX8559ETA11+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8559ETA11+T requirements.
6.How does Aetrix verify that MAX8559ETA11+T is sourced from the original manufacturer or authorized distributors?
All MAX8559ETA11+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 MAX8559ETA11+T meets industry standards.
7.What is the process for return or replacement of MAX8559ETA11+T?
All MAX8559ETA11+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8559ETA11+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 MAX8559ETA11+T part is unused and in its original packaging.
Return procedure for MAX8559ETA11+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8559ETA11+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…
