My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8888EZK18
- Part No.:
- MAX8888EZK18
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8888EZK18.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:600
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX8888EZK18 from Maxim Integrated is a fixed-output 1.8V, 300mA low-dropout linear regulator with open-drain POK flag, designed for power management in portable battery-powered systems. It operates from 2.5V to 5.5V input, delivers 100mV dropout at 200mA, consumes only 55µA quiescent current, and features thermal shutdown, short-circuit protection, and foldback current limiting - used in wireless handsets and notebook computers.
For engineers reviewing the MAX8888EZK18 datasheet, MAX8888EZK18 pinout, MAX8888EZK18 application, or MAX8888EZK18 equivalent, key selection criteria include guaranteed 300mA output, 1.8V preset output voltage, POK flag functionality, SOT23-5 package compatibility, and <0.1µA shutdown current for ultra-low-power system design.
Technical Context
The MAX8888EZK18 integrates a P-channel MOSFET pass transistor (RDS(ON) ≈ 0.5Ω) enabling load-independent 55µA ground current and low dropout performance. Its error amplifier compares feedback from an internal 1.25V reference and fixed resistor divider to regulate 1.8V output with ±2% accuracy over temperature and load.
It implements active-low open-drain POK with 92.5% trip threshold (±2.5%), hysteresis of ~1%, and valid operation down to 1.0V input. Shutdown control disables regulation and forces OUT/POK low while reducing supply current to 0.1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% over -40°C to +85°C, enabling direct replacement of 1.8V logic rails without external resistors. |
| Max Continuous Output Current | 300mA guaranteed - sufficient to power baseband processors, RF transceivers, or memory subsystems in handheld devices. |
| Dropout Voltage | 100mV at 200mA load - allows operation down to VIN = 1.9V, extending usable battery life in single-cell Li-ion or Li-poly systems. |
| Quiescent Current | 55µA no-load - maintains efficiency during light-load sleep modes without compromising transient response. |
| Shutdown Current | 0.1µA - enables multi-week standby in always-on IoT sensors or backup power domains. |
| POK Threshold Accuracy | 92.5% of nominal VOUT (±2.5%) - provides reliable power-good assertion for µC reset sequencing with minimal external components. |
| PSRR @ 1kHz | 40dB - suppresses switching noise from adjacent DC-DC converters feeding the LDO input rail. |
Pinout & Package
MAX8888EZK18 is housed in a thin 5-pin SOT23 package (1mm height), RoHS-compliant and lead-free, with standard JEDEC MO-178AC footprint and thermal pad omitted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–5.5V input; requires 2.2µF ceramic bypass to GND for stability and transient immunity. |
| 2 - GND | Power ground reference | Common return path for IN, OUT, SHDN, and POK; must be low-impedance connection to minimize noise coupling. |
| 3 - SHDN | Active-low enable control | Pulled low to disable regulator; draws ≤100nA bias current; tolerates up to 6V regardless of VIN/VOUT. |
| 4 - POK | Open-drain power-good flag | Drives low when VOUT < 92.5% of 1.8V; requires external pullup (e.g., 100kΩ to OUT) for logic-level signaling. |
| 5 - OUT | Regulated 1.8V output | Sources up to 300mA; requires 2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for loop stability and noise filtering. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.8V output | Eliminates external feedback resistors, reducing BOM count and layout area in space-constrained mobile PCBs. |
| POK output with hysteresis | Enables robust power-on-reset timing for microcontrollers without external supervisor ICs or RC delays. |
| 55µA ground current | Maintains high efficiency across full load range - critical for battery runtime in PDAs and digital cameras. |
| Foldback current limiting | Reduces fault current to 500mA when VOUT drops below 93%, protecting downstream circuitry during short circuits. |
| Thermal shutdown with 20°C hysteresis | Prevents permanent damage during sustained overload; enables self-recovery without manual reset in embedded systems. |
Applications
| Wireless Handsets | Notebook Computers |
|---|---|
|
Use Scenario: Powering baseband processor I/O banks and RF front-end bias rails in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying core logic voltage with fast load-transient response to burst-mode transmission. Use Value: 100mV dropout extends talk time by enabling operation until battery discharges to 1.9V; POK ensures clean µC boot after battery insertion. |
Use Scenario: Supplying DDR memory termination voltage (VTT) or chipset auxiliary rails in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary regulated source delivering stable 1.8V under dynamic CPU load changes and thermal throttling. Use Value: 40dB PSRR at 1kHz attenuates noise from main buck converter; 55µA quiescent current minimizes idle power draw during suspend-to-RAM. |
| PDAs and Palmtop Computers | Digital Cameras |
|
Use Scenario: Regulating power for touch-screen controller, flash memory interface, and LCD driver in handheld PDAs. IC Role / Device Role / Timing Role: Always-on LDO maintaining real-time clock and SRAM retention during deep-sleep mode. Use Value: 0.1µA shutdown current enables multi-month calendar backup on coin-cell; SOT23-5 footprint fits tight board areas near display connectors. |
Use Scenario: Providing clean 1.8V supply to image sensor interface (MIPI CSI-2) and ISP core in compact digital cameras. IC Role / Device Role / Timing Role: Low-noise, low-ripple regulator isolating analog sensor domain from noisy digital processing blocks. Use Value: Stable 1.8V output with ±2% accuracy prevents pixel corruption during high-speed capture; thermal protection avoids shutdown during extended video recording. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P182MR | 1.8V, 300mA, 150mV dropout at 200mA; no POK output; 1µA shutdown current. | Lacks power-good signaling - requires external supervisor for reset sequencing. | Select when POK is unnecessary and lowest possible shutdown current is prioritized over dropout performance. |
| Analog Devices ADP160AUJZ-1.8-R7 | 1.8V, 150mA max output; 190mV dropout at 150mA; includes POK; 1.4µA shutdown current. | Lower current rating limits use to peripheral rails, not core logic supplies. | Select for cost-sensitive, lower-current applications where POK is required but 300mA headroom is not needed. |
Compared with MAX8888EZK18, the XC6206P182MR trades POK functionality for lower shutdown current and higher dropout, while the ADP160AUJZ-1.8-R7 retains POK but halves output capability - making MAX8888EZK18 optimal for 1.8V, 300mA, POK-enabled designs requiring minimal dropout.
Availability
MAX8888EZK18 is available at Aetrix Electronics and suitable for wireless handsets, notebook computers, and digital cameras requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX8888EZK18 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX8887/MAX8888 product line was designed specifically for portable battery-powered equipment - emphasizing ultra-low quiescent current, small footprint, and integrated power-good signaling to simplify power architecture in space- and energy-constrained devices.
FAQ
What is the output voltage tolerance of MAX8888EZK18 over temperature and load?
The MAX8888EZK18 guarantees ±2% output voltage accuracy over the full -40°C to +85°C operating temperature range and for output currents from 100µA to 300mA. At +25°C and 100mA load, typical accuracy is ±1.2%. This tight tolerance ensures reliable operation of 1.8V logic interfaces without margining concerns in production environments.
Does MAX8888EZK18 require external capacitors, and what are the recommended values?
Yes, MAX8888EZK18 requires two external ceramic capacitors: a 2.2µF capacitor between IN and GND, and another 2.2µF capacitor between OUT and GND. Both must have ESR ≤ 0.1Ω. These values ensure stability, adequate load-transient response, and optimal PSRR - deviating from them may cause oscillation or degraded noise performance.
How does the POK output of MAX8888EZK18 behave during shutdown?
During shutdown (SHDN = GND), the MAX8888EZK18 drives both OUT and POK low. The POK pin remains actively pulled low regardless of output voltage level, providing a deterministic reset signal to downstream logic. This behavior eliminates need for external OR-ing diodes or additional supervision circuitry in shutdown-aware systems.
What is the maximum allowable input voltage for MAX8888EZK18, and what happens above that limit?
The absolute maximum input voltage for MAX8888EZK18 is +7V referenced to GND. Operation above 5.5V (the recommended maximum) risks permanent damage. Input undervoltage lockout activates below 2.4V (typical), preventing regulation until VIN rises above 2.15V - ensuring clean startup from weak or recovering battery sources.
Can MAX8888EZK18 be used in place of MAX8887EZK18, and what design changes are needed?
No - MAX8888EZK18 and MAX8887EZK18 are functionally distinct: MAX8888EZK18 includes POK but lacks BP pin and noise-reduction capability, while MAX8887EZK18 supports 42µVRMS noise performance via BP bypass. Swapping requires PCB layout change (pin 4 vs. pin 4 function) and removal of BP capacitor; POK pullup must be added if replacing MAX8887EZK18.
MAX8888EZK18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- 65 µA
- PSRR:
- 40dB (1kHz)
- 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:
- TSOT-23-5
MAX8888EZK18 FAQ
1.How can I place an order for MAX8888EZK18 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8888EZK18 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 MAX8888EZK18 reliable?
The price and inventory of MAX8888EZK18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8888EZK18 is usually 5 days.
3.What payment methods are accepted for MAX8888EZK18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8888EZK18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8888EZK18?
MAX8888EZK18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8888EZK18 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 MAX8888EZK18?
For technical support, including MAX8888EZK18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8888EZK18 requirements.
6.How does Aetrix verify that MAX8888EZK18 is sourced from the original manufacturer or authorized distributors?
All MAX8888EZK18 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 MAX8888EZK18 meets industry standards.
7.What is the process for return or replacement of MAX8888EZK18?
All MAX8888EZK18 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8888EZK18, 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 MAX8888EZK18 part is unused and in its original packaging.
Return procedure for MAX8888EZK18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8888EZK18 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…
