My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1818EUT50#TG16
- Part No.:
- MAX1818EUT50#TG16
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX1818EUT50#TG16.pdf
- Description:
- IC REG LIN POS ADJ 500MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,898
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX1818EUT50#TG16 from Maxim Integrated is a 5.0V preset, 500mA low-dropout linear regulator with ±1% output voltage accuracy, 120mV dropout at full load, and 125μA ground current-designed for power management in portable battery-powered systems such as notebook computers and USB hubs.
For engineers reviewing the MAX1818EUT50#TG16 datasheet, MAX1818EUT50#TG16 pinout, MAX1818EUT50#TG16 application, or MAX1818EUT50#TG16 equivalent, key selection criteria include guaranteed 500mA output under 2.5V–5.5V input, active-low open-drain POK output referenced to 93% of nominal VOUT, shutdown current ≤0.1μA, and SOT23-6 thermal performance up to +85°C.
Technical Context
The MAX1818EUT50#TG16 employs an internal P-channel MOSFET pass transistor (RDS(ON) ≈ 0.25Ω) enabling low dropout and load-independent quiescent current. Its Dual Mode™ architecture selects between factory-trimmed 5.0V output (via SET = GND) and adjustable mode (via external resistor divider), with VSET threshold of 1.25V ±12.5mV over temperature.
It integrates thermal shutdown at +170°C with 20°C hysteresis, short-circuit protection (0.55–1.8A limit), and a dedicated open-drain POK output that asserts low when VOUT falls below 93% of nominal-functionally independent of SHDN state but forced low during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Preset 5.0V ±1% at 100mA, ±3% over full load/temperature range-ensures stable core logic supply without external feedback components. |
| Dropout Voltage | 120mV at 500mA (VOUT = 5.0V)-enables operation down to 5.12V input, extending usable battery life in Li-ion or multi-cell alkaline systems. |
| Ground Current | 125μA typical at light load, ≤140μA at 500mA-minimizes standby power loss critical for always-on subsystems. |
| Shutdown Current | 0.1μA maximum-supports ultra-low-power sleep modes in portable devices with real-time clock or sensor wake-up circuits. |
| POK Threshold | 93% of nominal VOUT (4.65V), with 3% hysteresis-provides reliable power-good signaling to microcontrollers before brownout resets occur. |
| Thermal Protection | Shuts down at +170°C junction temperature, restarts after 20°C cooldown-prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Input Voltage Range | 2.5V to 5.5V-compatible with single Li-ion (3.0–4.2V), dual alkaline (2.4–3.2V), or regulated 3.3V/5V system rails. |
Pinout & Package
Package: RoHS-compliant 6-pin SOT23-6 (U6FH-6 outline), 800mW power dissipation at +70°C ambient, requires IPC/JEDEC J-STD-020A reflow profile with preheat.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input supply | Accepts 2.5V–5.5V; bypass with ≥1µF ceramic capacitor to GND for stability and transient response. |
| 2 POK | Open-drain power-ok indicator | Pulls low when VOUT < 4.65V; requires external 100kΩ pull-up to OUT for logic-level signal to µC reset or monitoring. |
| 3 SHDN | Active-low enable control | Logic low (<0.6V) disables regulator, reduces IQ to ≤0.1μA, forces POK low and OUT high-impedance. |
| 4 GND | Power and signal reference | Must connect to low-impedance ground plane; shares thermal path with IN and OUT pins for optimal heatsinking. |
| 5 SET | Voltage-setting input | Internally tied to 1.25V reference; grounded for 5.0V preset mode; connected to resistive divider for adjustable outputs (1.25–5.0V). |
| 6 OUT | Regulated output | Delivers up to 500mA; bypass with ≥3.3µF low-ESR (<0.1Ω) ceramic capacitor to GND for stability and noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Output Selection | Factory-trimmed 5.0V output enabled by grounding SET pin-eliminates external resistors and layout complexity for fixed-voltage applications. |
| Low Dropout Architecture | P-channel MOSFET pass element with 0.25Ω RDS(ON)-avoids base-drive current losses seen in PNP regulators, maintaining 125μA IQ even in dropout. |
| Integrated Power-Good Monitoring | POK output asserts low at 93% VOUT with hysteresis-enables deterministic system power sequencing without external comparators or RC networks. |
| Robust Fault Protection | Combined thermal shutdown (+170°C), short-circuit current limiting (0.55–1.8A), and output current foldback-protects against sustained overload without external circuitry. |
| Ultra-Low Shutdown Current | 0.1μA max shutdown supply current-extends battery shelf life and supports >1-year backup power in portable medical or IoT edge nodes. |
Applications
| Notebook Computers | USB Hubs |
|---|---|
Use Scenario: Regulating 5.0V bus power for peripheral ports and embedded controllers in clamshell-form factor notebooks. IC Role / Device Role / Timing Role: Primary 5V LDO delivering stable, low-noise power to USB transceivers and embedded microcontrollers. Use Value: 120mV dropout enables operation across full Li-ion discharge curve (4.2V → 3.0V), while ±1% accuracy ensures USB compliance and prevents enumeration failures. | Use Scenario: Providing clean, regulated 5.0V to downstream USB 2.0 ports and hub controller ICs in self-powered desktop or travel hubs. IC Role / Device Role / Timing Role: Fixed-output power rail generator with integrated POK signaling for hub controller power sequencing and fault detection. Use Value: POK output directly interfaces with hub controller's RESET# pin, eliminating discrete supervisor ICs and reducing BOM count by one component. |
| Cellular Telephones | Docking Stations |
Use Scenario: Supplying 5.0V to RF front-end modules and baseband processors during high-current transmit bursts. IC Role / Device Role / Timing Role: High-current, low-noise LDO supporting dynamic load steps up to 500mA with <8mV transient deviation. Use Value: 125μA ground current minimizes quiescent drain during idle mode, extending talk time; thermal protection prevents latch-up during antenna coupling events. | Use Scenario: Delivering 5.0V to laptop-docking interface logic, display port converters, and auxiliary peripherals in modular docking stations. IC Role / Device Role / Timing Role: System-level power supervisor ensuring host laptop detects dock presence only after stable 5V rail is established. Use Value: POK signal synchronizes dock controller initialization with rail stabilization, preventing spurious hot-plug detection and firmware lockups. |
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 |
|---|---|---|---|
| TPS76350DBVR | 500mA output, 160mV dropout at 500mA, ±2% accuracy, no POK output, 250μA IQ | Lacks power-good signaling; requires external supervisor for sequencing | Select when POK is unnecessary and cost sensitivity outweighs feature parity. |
| MCP1703T-5002E/MB | 250mA output, 600mV dropout at 250mA, ±2% accuracy, no POK, 2μA shutdown current | Lower current rating and higher dropout limit use to low-power microcontroller rails only | Select only for sub-250mA loads where ultra-low shutdown current is prioritized over output capability. |
Compared with TPS76350DBVR and MCP1703T-5002E/MB, the MAX1818EUT50#TG16 uniquely combines 500mA delivery, 120mV dropout, ±1% accuracy, and integrated POK in SOT23-6-making it the sole option among these three for space-constrained, sequenced 5V systems requiring both high current and deterministic power-good assertion.
Availability
MAX1818EUT50#TG16 is available at Aetrix Electronics and suitable for notebook computers, USB hubs, and cellular telephones requiring stable component supply across extended production lifecycles and industrial temperature ranges.
Supply support for MAX1818EUT50#TG16 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 MAX1818 series targets battery-powered equipment requiring high-current, low-quiescent LDOs with integrated supervision-specifically addressing design challenges in PDAs, cellular handsets, and compact computing platforms.
FAQ
What is the guaranteed output voltage accuracy of the MAX1818EUT50#TG16 across temperature and load?
The MAX1818EUT50#TG16 guarantees ±1% output voltage accuracy at 100mA and +25°C. Over the full -40°C to +85°C operating range and 1mA–500mA load, accuracy degrades to ±3%. This specification ensures reliable 5.0V regulation for USB-compliant peripherals and microcontroller I/O rails without external trimming.
Does the MAX1818EUT50#TG16 require external components to operate in 5.0V preset mode?
No, the MAX1818EUT50#TG16 operates in 5.0V preset mode with only two external capacitors: a 1µF ceramic capacitor on IN and a 3.3µF low-ESR ceramic capacitor on OUT. The SET pin must be connected to GND-no resistors or additional supervision circuitry are needed for basic 5.0V regulation.
How does the POK output of the MAX1818EUT50#TG16 behave during shutdown?
During shutdown (SHDN = GND), the MAX1818EUT50#TG16 forces the POK output low regardless of the actual VOUT level. This behavior provides unambiguous power-fail indication to system controllers-even if the output capacitor retains residual voltage-and ensures safe reset sequencing before entering deep sleep states.
What thermal derating applies to the MAX1818EUT50#TG16 in a standard SOT23-6 footprint?
The MAX1818EUT50#TG16 has a continuous power dissipation limit of 800mW at +70°C ambient, derating linearly by 10mW/°C above that temperature. With minimal copper, its effective dissipation drops to 712mW at +70°C; adding a quarter-square-inch shared copper area among IN, OUT, and GND pins improves it to 790mW-critical for sustaining 500mA at high input-output differentials.
Can the MAX1818EUT50#TG16 be used with input voltages below 2.5V?
No, the MAX1818EUT50#TG16 specifies an absolute minimum input voltage of 2.5V per its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this violates the device's functional specification-output regulation cannot be guaranteed, and internal circuitry (e.g., reference, error amplifier) may not bias correctly, risking unstable or undefined behavior.
MAX1818EUT50#TG16 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.25V (5V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.22V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 250 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:
- SOT-6
MAX1818EUT50#TG16 FAQ
1.How can I place an order for MAX1818EUT50#TG16 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1818EUT50#TG16 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 MAX1818EUT50#TG16 reliable?
The price and inventory of MAX1818EUT50#TG16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1818EUT50#TG16 is usually 5 days.
3.What payment methods are accepted for MAX1818EUT50#TG16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1818EUT50#TG16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1818EUT50#TG16?
MAX1818EUT50#TG16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1818EUT50#TG16 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 MAX1818EUT50#TG16?
For technical support, including MAX1818EUT50#TG16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1818EUT50#TG16 requirements.
6.How does Aetrix verify that MAX1818EUT50#TG16 is sourced from the original manufacturer or authorized distributors?
All MAX1818EUT50#TG16 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 MAX1818EUT50#TG16 meets industry standards.
7.What is the process for return or replacement of MAX1818EUT50#TG16?
All MAX1818EUT50#TG16 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1818EUT50#TG16, 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 MAX1818EUT50#TG16 part is unused and in its original packaging.
Return procedure for MAX1818EUT50#TG16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1818EUT50#TG16 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
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…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
