My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1818EUT18#G16
- Part No.:
- MAX1818EUT18#G16
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX1818EUT18#G16.pdf
- Description:
- IC REG LIN POS ADJ 500MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:1,616
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX1818EUT18#G16 from Maxim Integrated is a 500mA low-dropout linear regulator with preset 1.8V output, operating from 2.5V to 5.5V input, featuring ±1% output voltage accuracy, 120mV dropout at full load, and 125µA ground current - designed for power management in space-constrained portable electronics including cellular phones and PDAs.
For engineers reviewing the MAX1818EUT18#G16 datasheet, MAX1818EUT18#G16 pinout, MAX1818EUT18#G16 application, or MAX1818EUT18#G16 equivalent, key selection criteria include guaranteed 500mA output under 120mV dropout, active-low open-drain POK output referenced to 93% of nominal VOUT, shutdown current below 0.1µA, thermal shutdown at +170°C, and compatibility with 3.3µF low-ESR ceramic output capacitors.
Technical Context
The MAX1818EUT18#G16 integrates a P-channel MOSFET pass transistor (RDS(ON) ≈ 0.25Ω) enabling low quiescent current independent of load, and employs a 1.25V internal reference with error amplifier feedback to regulate output. Its Dual Mode™ architecture selects between factory-trimmed 1.8V output (SET tied to GND) or adjustable mode via external resistor divider.
It features an open-drain POK output asserting low when VOUT falls below 93% of nominal, thermal shutdown with 20°C hysteresis, and current limiting that increases from 0.8A to 1.6A when VOUT is within 4% of regulation - all implemented in a thermally optimized 6-pin SOT23 package rated for 800mW at +70°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Preset 1.8V ±1% over -40°C to +85°C; stable under 500mA load and 120mV dropout |
| Input Voltage Range | 2.5V to 5.5V; supports single-cell Li-ion, dual-cell NiMH, and 3.3V/5V system rails |
| Dropout Voltage | 120mV at 500mA (typical); enables operation down to 1.92V input for 1.8V output |
| Ground Current | 125µA at 500mA load; remains constant across load and dropout, minimizing battery drain |
| Shutdown Current | 0.1µA max; reduces system standby power in portable devices during sleep modes |
| POK Threshold | 93% of nominal VOUT (1.674V); provides reliable power-good signaling for microcontrollers |
| Thermal Shutdown | Activates at +170°C with 20°C hysteresis; prevents permanent damage during sustained overload |
Pinout & Package
Package: 6-pin SOT23 (U6F-6), 800mW power dissipation rating at +70°C, RoHS-compliant (G16 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input supply | Accepts 2.5V–5.5V; requires 1µF bypass capacitor to GND for stability and noise reduction |
| 2 POK | Open-drain power-ok indicator | Pulls low when VOUT < 93% of 1.8V; requires external 100kΩ pull-up to OUT for logic-level signal |
| 3 SHDN | Active-low shutdown control | Logic low disables regulator, sets OUT to high-Z, and forces POK low; tolerates up to 6V |
| 4 GND | Power and signal reference | Common return path; must be connected with low-inductance layout to support 500mA RMS current |
| 5 SET | Feedback mode selector | Tied to GND for 1.8V preset mode; connects to external resistor divider for adjustable output (1.25V–5.0V) |
| 6 OUT | Regulated output | Delivers up to 500mA; requires 3.3µF low-ESR (<0.1Ω) ceramic capacitor to GND for stability |
Key Features
| Feature | Design Value |
|---|---|
| P-Channel MOSFET Pass Transistor | Eliminates base-drive current loss; enables 125µA ground current independent of load and dropout condition |
| Dual Mode™ Feedback Selection | Automatic switching between internal 1.8V trim and external resistor-adjustable mode based on SET pin voltage |
| Load-Enhanced Current Limit | Increases from 0.8A to 1.6A when VOUT is within 4% of regulation, improving transient response to large load steps |
| Thermal Protection with Hysteresis | Shuts down at +170°C and re-enables only after cooling by 20°C, preventing thermal runaway during continuous overload |
| Low-Noise Output | 115µVRMS (10Hz–1MHz); achieved via internal compensation and optimized capacitor interface |
Applications
| Cellular Phones | Notebook Computers |
|---|---|
Use Scenario: Powering baseband processor core voltage rail in GSM/UMTS handsets with tight battery voltage swing. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying processor I/O and memory interface, maintaining regulation as Li-ion discharges from 4.2V to 3.0V. Use Value: 120mV dropout extends usable battery life by enabling operation down to 1.92V input, while ±1% accuracy ensures reliable digital logic timing margins. | Use Scenario: Providing clean 1.8V supply to DDR memory termination and chipset I/O banks in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary LDO delivering low-noise, tightly regulated voltage for high-speed memory interfaces requiring stable VTT/VREF. Use Value: 115µVRMS output noise and fast load-transient response (<8mV step) prevent data corruption during burst memory access. |
| Personal Digital Assistants (PDAs) | USB Hubs |
Use Scenario: Supplying 1.8V to ARM-based application processors and touch controller in handheld PDAs with coin-cell backup capability. IC Role / Device Role / Timing Role: Main system LDO managing dynamic voltage scaling during CPU frequency changes and deep-sleep transitions. Use Value: 0.1µA shutdown current minimizes leakage in always-on backup domains, extending shelf life without compromising wake-up latency. | Use Scenario: Generating 1.8V auxiliary rail for USB 2.0 transceiver PHY and hub controller logic in self-powered desktop hubs. IC Role / Device Role / Timing Role: Dedicated LDO isolating noise-sensitive USB signaling from noisy 5V bus-derived supplies. Use Value: High PSRR (>60dB at 1kHz) and 3.3µF ceramic capacitor interface suppress host-controller switching noise, ensuring USB compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76318DBVR | Fixed 1.8V output, 150mA max load, higher 220mV dropout at full load, 85µA IQ | Limited to lower-current peripherals; unsuitable for 500mA processor cores | Select MAX1818EUT18#G16 when ≥500mA output and <130mV dropout are required |
| MCP1700T-1802E/MB | 1.8V fixed, 250mA output, 178mV dropout at 250mA, 1.6µA IQ | Optimized for ultra-low-IQ sensor nodes; lacks POK and thermal foldback | Choose MAX1818EUT18#G16 where power-good signaling and robust fault protection are mandatory |
Compared with TPS76318DBVR and MCP1700T-1802E/MB, the MAX1818EUT18#G16 uniquely delivers 500mA output with 120mV dropout and integrated POK/thermal/current protection in the same SOT23 footprint - making it suitable for high-current portable SoC rails where reliability and battery efficiency are co-prioritized.
Availability
MAX1818EUT18#G16 is available at Aetrix Electronics and suitable for cellular phones, notebook computers, PDAs, USB hubs, and docking stations requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX1818EUT18#G16 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 communications applications.
The MAX1818EUT18#G16 belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-powered portable systems requiring high output current, ultra-low quiescent current, and comprehensive fault protection in minimal PCB area.
FAQ
What is the exact output voltage tolerance and temperature range specification for the MAX1818EUT18#G16?
The MAX1818EUT18#G16 delivers a factory-trimmed 1.8V output with ±1% accuracy over the full operating temperature range of –40°C to +85°C, verified at 100mA–500mA load currents and input voltages ≥ VOUT + 0.5V. This tolerance is guaranteed by design and confirmed through 100% production testing at +25°C, with limits over temperature ensured by characterization.
Does the MAX1818EUT18#G16 require external components for stable operation, and if so, what are the minimum requirements?
Yes, the MAX1818EUT18#G16 requires a 1µF ceramic capacitor between IN and GND, and a 3.3µF low-ESR (<0.1Ω) ceramic capacitor between OUT and GND for stable operation across –40°C to +85°C and up to 500mA load. For output voltages below 2V, a 4.7µF output capacitor is recommended. These values are specified in the datasheet and validated in typical operating circuits.
How does the POK (Power-OK) output function on the MAX1818EUT18#G16, and what external circuitry is needed?
The POK output on the MAX1818EUT18#G16 is an open-drain N-channel device that pulls low when VOUT drops below 93% of nominal (1.674V). To generate a logic-high signal when regulation is valid, a 100kΩ pull-up resistor from POK to OUT is required. During shutdown, POK is actively held low regardless of VOUT, providing unambiguous power-status indication to microcontrollers.
What thermal protection behavior does the MAX1818EUT18#G16 exhibit under sustained overload conditions?
The MAX1818EUT18#G16 activates thermal shutdown at +170°C junction temperature and remains off until the die cools by 20°C (to +150°C), resulting in pulsed output during continuous overload. This hysteresis prevents oscillation and allows safe cooldown. The absolute maximum junction temperature is +150°C for continuous operation, and the 800mW power dissipation limit at +70°C assumes proper PCB copper layout per datasheet guidelines.
Can the MAX1818EUT18#G16 be used in adjustable-output configurations, and how is the output voltage set?
Yes, the MAX1818EUT18#G16 supports adjustable output from 1.25V to 5.0V by connecting the SET pin to a resistive divider between OUT and GND. With VSET = 1.25V, R2 is selected between 25kΩ and 100kΩ, and R1 is calculated using R1 = R2 × ((VOUT / 1.25V) – 1). When SET is grounded, the device operates in preset 1.8V mode - the configuration defined for the MAX1818EUT18#G16 part number.
MAX1818EUT18#G16 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 (1.8V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- -
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 250 µA
- Current - Supply (Max):
- 140 µA
- 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
MAX1818EUT18#G16 FAQ
1.How can I place an order for MAX1818EUT18#G16 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1818EUT18#G16 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 MAX1818EUT18#G16 reliable?
The price and inventory of MAX1818EUT18#G16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1818EUT18#G16 is usually 5 days.
3.What payment methods are accepted for MAX1818EUT18#G16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1818EUT18#G16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1818EUT18#G16?
MAX1818EUT18#G16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1818EUT18#G16 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 MAX1818EUT18#G16?
For technical support, including MAX1818EUT18#G16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1818EUT18#G16 requirements.
6.How does Aetrix verify that MAX1818EUT18#G16 is sourced from the original manufacturer or authorized distributors?
All MAX1818EUT18#G16 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 MAX1818EUT18#G16 meets industry standards.
7.What is the process for return or replacement of MAX1818EUT18#G16?
All MAX1818EUT18#G16 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1818EUT18#G16, 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 MAX1818EUT18#G16 part is unused and in its original packaging.
Return procedure for MAX1818EUT18#G16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1818EUT18#G16 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
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 …
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…
