My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1806EUA08+
- Part No.:
- MAX1806EUA08+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX1806EUA08+.pdf
- Description:
- IC REG LIN POS ADJ 500MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,006
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1806EUA08+ from Maxim Integrated is a 500mA, low-dropout linear regulator with fixed 0.8V output, ±1% accuracy over -40°C to +85°C, 175mV dropout at full load, and 210μA ground current - designed for power rail regulation in space-constrained portable systems such as PDAs, USB hubs, and docking stations.
For engineers reviewing the MAX1806EUA08+ datasheet, MAX1806EUA08+ pinout, MAX1806EUA08+ application, or MAX1806EUA08+ equivalent, key selection criteria include guaranteed 0.8V preset output, thermal shutdown at 170°C, active-low POK monitoring, 0.02μA shutdown current, and compatibility with 1μF/10μF ceramic input/output capacitors.
Technical Context
The MAX1806EUA08+ integrates an internal 0.8V reference, error amplifier, and P-channel MOSFET pass transistor (RDS(ON) ≈ 0.4Ω) to achieve low dropout and minimal quiescent current. Its dual-mode comparator selects preset operation when SET is grounded, fixing VOUT at 0.8V without external resistors.
It features open-drain POK output referenced to 93% of nominal VOUT, thermal shutdown with 20°C hysteresis, and short-circuit protection limiting output current to 700–2500mA. The exposed thermal pad on the underside of the package enables direct heat conduction to PCB ground planes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.8V ±1% (guaranteed over -40°C to +85°C, 1mA–500mA load) |
| Dropout Voltage | 175mV at 500mA (enables operation down to VIN = 0.975V, critical for end-of-battery-life support) |
| Ground Current | 210μA at 1mA load (low quiescent draw extends battery life in always-on subsystems) |
| Shutdown Current | 0.02μA (reduces system standby power to nanoampere level) |
| Input Voltage Range | +2.25V to +5.5V (supports single-cell Li-ion, 3.3V/5V rails, and wide-input industrial supplies) |
| Thermal Shutdown | 170°C with 20°C hysteresis (prevents permanent damage during sustained overload or poor heatsinking) |
| Power-OK Threshold | 93% of nominal VOUT (provides reliable microcontroller reset signaling under brownout conditions) |
Pinout & Package
The MAX1806EUA08+ uses an 8-pin Power-μMAX package (1.3W rating) with an exposed metal thermal pad on the underside for enhanced heat dissipation. The package requires soldering of both GND pin (5) and the exposed pad to a large PCB ground plane or thermal via array.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 - IN | Regulator input supply | Accepts +2.25V to +5.5V; must be bypassed with 1μF ceramic capacitor to GND near pins |
| 3 - POK | Open-drain, active-low power-good indicator | Pulls low when VOUT < 93% of 0.8V; requires 100kΩ pullup to OUT for logic-level signaling |
| 4 - SHDN | Active-low shutdown control | Drives low to reduce supply current to 0.02μA; tolerant up to +6V regardless of VIN/VOUT |
| 5 - GND | Ground reference and thermal path | Must be connected to PCB ground plane; exposed pad underneath serves as primary heatsink |
| 6 - SET | Voltage-setting input | Internally tied to 0.8V reference; grounded to enable fixed 0.8V output mode |
| 7, 8 - OUT | Regulated output | Sources up to 500mA; requires 10μF low-ESR (<0.1Ω) ceramic capacitor to GND for stability |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 0.8V output with ±1% accuracy | Eliminates external feedback resistors and associated layout sensitivity for core logic rail generation |
| 175mV dropout at 500mA | Enables >90% efficiency at light loads and extends usable battery voltage range in portable designs |
| 0.02μA shutdown current | Supports ultra-low-power sleep modes in battery-backed systems without compromising wake-up latency |
| Integrated thermal shutdown (170°C) | Provides autonomous fault recovery without external circuitry, enabling robust operation in sealed enclosures |
| Open-drain POK with 93% threshold | Delivers deterministic power-fail detection compatible with standard microcontroller reset inputs |
Applications
| Mobile Baseband Core Supply | USB Hub VBUS Regulation |
|---|---|
|
Use Scenario: Regulating 0.8V core voltage for ARM-based application processors in smartphones and tablets. IC Role / Device Role / Timing Role: Primary LDO supplying CPU/GPU core logic with tight DC accuracy and fast transient response. Use Value: ±1% output accuracy ensures stable operation across temperature and load; 175mV dropout preserves battery runtime during deep discharge. |
Use Scenario: Providing clean, regulated 0.8V auxiliary rail for USB 3.0 hub controller I/O or PHY biasing. IC Role / Device Role / Timing Role: Secondary LDO delivering low-noise, low-ripple supply independent of main 3.3V/5V rails. Use Value: 300μVRMS output noise and high PSRR (>60dB @ 1kHz) prevent data corruption in high-speed serial links. |
| Docking Station Auxiliary Rail | Industrial Sensor Node Power |
|
Use Scenario: Generating isolated 0.8V supply for FPGA configuration logic or low-voltage memory in modular docking stations. IC Role / Device Role / Timing Role: Standby-capable LDO enabling hot-plug detection and firmware initialization before main system power-up. Use Value: 0.02μA shutdown current allows indefinite retention of configuration state during dock removal; POK confirms rail readiness to host MCU. |
Use Scenario: Powering ultra-low-power microcontrollers (e.g., ARM Cortex-M0+) and analog front-ends in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Primary power source for intermittent-sampling systems requiring nanowatt standby and millisecond wake-up. Use Value: 210μA ground current at 1mA load and thermal shutdown ensure reliability in unventilated enclosures across -40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0508PDBVR | 0.8V fixed output, 200mA max, 170mV dropout, 25μA IQ, SOT-23-5 package | Limited to 200mA; lacks POK output and thermal hysteresis; smaller footprint but lower power handling | Select when board space is critical and load current ≤200mA; not suitable for 500mA USB hub or baseband use cases |
| MCP1804T-0802I/OT | 0.8V fixed output, 150mA max, 230mV dropout, 45μA IQ, SOT-23-5 package | No POK, no thermal shutdown, lower current rating, higher dropout at full load | Only appropriate for sub-150mA sensor nodes where cost is prioritized over protection features and headroom |
Compared with MAX1806EUA08+, both alternatives offer smaller packages and lower quiescent current but sacrifice 500mA capability, integrated POK monitoring, and robust thermal protection - making them unsuitable for portable computing or high-reliability embedded applications requiring full-feature LDO functionality.
Availability
MAX1806EUA08+ is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, USB hubs, and docking stations requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX1806EUA08+ 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 industrial, communications, and consumer applications.
The MAX1806 series was designed specifically for low-voltage, high-current portable power management - delivering precision regulation, ultra-low quiescent current, and integrated protection in miniature μMAX packages.
FAQ
What is the exact output voltage tolerance of the MAX1806EUA08+ across temperature and load?
The MAX1806EUA08+ guarantees ±1% output voltage accuracy at +85°C and 100mA load, ±1.5% at +85°C over 1mA–500mA, and ±3% over -40°C to +85°C with VIN > VOUT + 0.5V. This 0.8V ±1% spec ensures reliable core logic operation in portable devices without external trimming. The MAX1806EUA08+ achieves this via factory-trimmed internal feedback, eliminating resistor tolerance drift.
Does the MAX1806EUA08+ require external components to operate in fixed 0.8V mode?
No, the MAX1806EUA08+ operates in fixed 0.8V mode with only two mandatory external components: a 1μF ceramic capacitor on IN and a 10μF low-ESR ceramic capacitor on OUT. The SET pin must be connected to GND, and no feedback resistors are needed - the "08" suffix confirms factory-trimmed 0.8V output. The MAX1806EUA08+ simplifies layout and reduces BOM count versus adjustable regulators.
How does the POK output of the MAX1806EUA08+ behave during shutdown?
During shutdown (SHDN = GND), the MAX1806EUA08+ forces the POK output low regardless of VOUT level - providing unambiguous power-fail signaling to the host microcontroller. This behavior is specified in the Electrical Characteristics table under "SHUTDOWN" section and ensures deterministic system reset sequencing. The MAX1806EUA08+ maintains this forced-low state until SHDN returns high and VOUT stabilizes above 93% of 0.8V.
What thermal design considerations apply to the MAX1806EUA08+ package?
The MAX1806EUA08+ uses an 8-pin Power-μMAX package with an exposed thermal pad on the underside that must be soldered to a PCB ground plane or large copper area. Failure to connect this pad increases thermal resistance, risking junction temperatures exceeding +150°C under 500mA load. The MAX1806EUA08+ datasheet specifies 1.3W maximum power dissipation at +70°C ambient, derating by 17mW/°C above that point.
Can the MAX1806EUA08+ be used with input voltages below 2.25V?
No - the MAX1806EUA08+ has a minimum input voltage of +2.25V per Absolute Maximum Ratings and Electrical Characteristics tables. Input undervoltage lockout activates below ~1.85V (rising edge), preventing regulation. Attempting to operate below 2.25V risks unstable output or complete dropout. The MAX1806EUA08+ is not rated for single NiMH or alkaline cell operation; it requires ≥2.25V sources such as Li-ion (2.7–4.2V) or regulated 3.3V/5V rails.
MAX1806EUA08+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V (0.8V)
- Voltage - Output (Max):
- 4.5V
- Voltage Dropout (Max):
- -
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 400 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Power Good
- 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-uMAX-EP|8-uSOP-EP
MAX1806EUA08+ FAQ
1.How can I place an order for MAX1806EUA08+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1806EUA08+ 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 MAX1806EUA08+ reliable?
The price and inventory of MAX1806EUA08+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1806EUA08+ is usually 5 days.
3.What payment methods are accepted for MAX1806EUA08+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1806EUA08+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1806EUA08+?
MAX1806EUA08+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1806EUA08+ 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 MAX1806EUA08+?
For technical support, including MAX1806EUA08+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1806EUA08+ requirements.
6.How does Aetrix verify that MAX1806EUA08+ is sourced from the original manufacturer or authorized distributors?
All MAX1806EUA08+ 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 MAX1806EUA08+ meets industry standards.
7.What is the process for return or replacement of MAX1806EUA08+?
All MAX1806EUA08+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1806EUA08+, 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 MAX1806EUA08+ part is unused and in its original packaging.
Return procedure for MAX1806EUA08+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1806EUA08+ 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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 …
