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Analog Devices Inc./Maxim Integrated MAX8888EZK25+T
- Part No.:
- MAX8888EZK25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8888EZK25+T.pdf
- Description:
- IC REG LIN 2.5V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,736
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Product details
Overview
MAX8888EZK25+T from Maxim Integrated is a low-dropout linear regulator delivering 300mA continuous output at a fixed 2.5V output voltage, operating from 2.5V to 5.5V input, with 100mV dropout at 200mA load and integrated open-drain power-OK (POK) flag - used in portable battery-powered systems such as wireless handsets and digital cameras.
For engineers reviewing the MAX8888EZK25+T datasheet, MAX8888EZK25+T pinout, MAX8888EZK25+T application, or MAX8888EZK25+T equivalent, key selection criteria include guaranteed 300mA output current, POK functionality for system power sequencing, 55µA no-load quiescent current, thermal/short-circuit protection, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX8888EZK25+T integrates a p-channel MOSFET pass transistor with 0.5Ω RDS(ON), enabling low dropout and load-independent 55µA supply current. Its internal 1.25V reference and error amplifier regulate output via factory-trimmed feedback divider.
It features active-low open-drain POK output asserting when VOUT falls below 92.5% of nominal (2.313V), with 1% hysteresis and valid operation across 1.0V–5.5V input range. Shutdown reduces supply current to 0.1µA while driving both OUT and POK low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±3% over -40°C to +85°C - ensures stable core/sensor rail without external resistors. |
| Max Output Current | 300mA continuous (500mA pulsed) - supports burst-mode processors and camera flash drivers. |
| Dropout Voltage | 100mV at 200mA - enables regulation down to 2.6V input, extending usable life of single-cell Li-ion batteries. |
| Quiescent Current | 55µA at no load - minimizes standby power loss in always-on subsystems like RTC or wake-up logic. |
| POK Threshold | 92.5% of nominal (2.313V) with 1% hysteresis - provides clean, glitch-free power-good assertion for µC reset timing. |
| PSRR | 40dB at 1kHz - suppresses switching noise from adjacent DC-DC converters in mixed-signal SoC supplies. |
| Thermal Shutdown | 170°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
MAX8888EZK25+T is housed in a thin 5-pin SOT23 package (1mm height, Z5-1 footprint), RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–5.5V; requires 2.2µF ceramic bypass to GND for stability and transient response. |
| 2 - GND | Power ground reference | Low-impedance return path for regulator current and POK pullup; must be connected directly to PCB ground plane. |
| 3 - SHDN | Active-low shutdown control | Logic low (<0.6V) disables regulator and forces OUT/POK low; high (>1.6V) enables operation; tolerates up to 6V. |
| 4 - POK | Open-drain power-OK output | Drives low when VOUT < 2.313V; requires external 100kΩ pullup to OUT for logic-level signaling to microcontrollers. |
| 5 - OUT | Regulated output terminal | Delivers 2.5V @ ≤300mA; requires 2.2µF ceramic capacitor (ESR <0.1Ω) to GND for loop stability and noise filtering. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated POK output | Enables reliable power-on-reset and system sequencing without external supervisor ICs. |
| 55µA no-load ground current | Maintains ultra-low quiescent draw across full load range - critical for multi-day battery life in portable devices. |
| Foldback current limiting | Reduces short-circuit current to 500mA when VOUT drops below 93%, lowering fault power dissipation. |
| Thermal shutdown with hysteresis | Auto-recovers after 20°C cooldown, allowing safe intermittent operation under marginal thermal conditions. |
| SOT23-5 package compatibility | Matches industry-standard 5-pin SOT23 land pattern (Z5-1), enabling drop-in replacement in existing designs. |
Applications
| Wireless Handsets | Digital Cameras |
|---|---|
|
Use Scenario: Powering baseband processor I/O rails and RF front-end bias circuits in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary LDO supplying clean 2.5V to sensitive analog sections with tight voltage tolerance. Use Value: 100mV dropout extends talk time by maintaining regulation until battery reaches 2.6V, while POK synchronizes modem boot sequence. |
Use Scenario: Supplying image sensor interface and auto-focus motor driver circuitry in compact digital cameras. IC Role / Device Role / Timing Role: Dedicated 2.5V LDO with fast load-transient response to handle sensor pixel readout bursts. Use Value: 500mA pulsed capability supports AF motor activation without brownout; 40dB PSRR rejects noise from camera flash DC-DC converter. |
| Notebook Subsystems | Hand-Held Instruments |
|
Use Scenario: Regulating auxiliary 2.5V rail for USB controller, card reader, or embedded security module in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary LDO providing isolated, low-noise power independent of main CPU VRM. Use Value: 55µA quiescent current minimizes standby drain during sleep mode; SOT23-5 footprint saves board area in dense BGA layouts. |
Use Scenario: Powering precision ADC reference buffers and low-power microcontroller peripherals in handheld multimeters and data loggers. IC Role / Device Role / Timing Role: Stable 2.5V reference-grade supply with <±3% accuracy over temperature and load. Use Value: Tight output accuracy and thermal shutdown ensure measurement integrity across -40°C to +85°C field operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P252MR | 2.5V fixed output, 300mA, 150mV dropout at 200mA, no POK output, 1µA shutdown current | Lacks power-OK flag; suitable only where system-level monitoring replaces POK dependency | Select when POK is unnecessary and lowest possible shutdown current is prioritized over dropout performance. |
| Analog Devices ADP121-AUJZ-2.5-R7 | 2.5V fixed output, 150mA max, 135mV dropout at 150mA, no POK, 30µA quiescent current | Lower current rating and no POK; rated for automotive AEC-Q100 Grade 3 | Choose only for lower-current, automotive-qualified applications where POK and 300mA capability are not required. |
Compared with MAX8888EZK25+T, the XC6206P252MR offers lower shutdown current but sacrifices POK functionality and higher dropout, while the ADP121-AUJZ-2.5-R7 trades 300mA capability and POK for automotive qualification and reduced quiescent draw - making MAX8888EZK25+T the sole option supporting full-feature portable power sequencing at 300mA.
Availability
MAX8888EZK25+T is available at Aetrix Electronics and suitable for wireless handsets, digital cameras, and handheld instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8888EZK25+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, communications, and consumer applications.
The MAX8887/MAX8888 family was engineered specifically for battery-powered portable electronics, emphasizing ultra-low quiescent current, low dropout, and integrated power-monitoring features like POK in minimal SOT23-5 form factor.
FAQ
What is the output voltage tolerance of the MAX8888EZK25+T over temperature and load?
The MAX8888EZK25+T maintains output voltage within ±3% over the full -40°C to +85°C operating temperature range and for load currents from 100µA to 300mA. This specification is guaranteed by design and verified across process corners, ensuring reliable 2.5V regulation for precision analog and digital circuitry without external trimming.
Does the MAX8888EZK25+T require an external bypass capacitor on the BP pin?
No - the BP (bypass) pin is specific to the MAX8887 variant for noise reduction and is not present on the MAX8888EZK25+T. The MAX8888EZK25+T uses a different internal architecture that omits the BP pin; its pinout consists solely of IN, GND, SHDN, POK, and OUT. Referencing BP-related design guidance from MAX8887 datasheets does not apply to MAX8888EZK25+T.
What is the minimum input voltage required for the MAX8888EZK25+T to maintain regulation at full 300mA load?
At 300mA load, the MAX8888EZK25+T requires a minimum input voltage of 2.65V to maintain regulation, based on its typical dropout voltage of 150mV (per Electrical Characteristics table). This ensures stable 2.5V output even as single-cell Li-ion batteries discharge near end-of-life.
Can the POK output of the MAX8888EZK25+T drive a standard CMOS input directly?
No - the POK output is open-drain and requires an external pullup resistor to establish a defined high logic level. A 100kΩ resistor from POK to OUT is recommended per the datasheet; connecting POK directly to a CMOS input without pullup results in undefined logic states and potential system boot failure.
Is the MAX8888EZK25+T pin-compatible with other variants in the MAX8887/MAX8888 family?
Yes - all MAX8887 and MAX8888 variants, including MAX8888EZK25+T, share identical 5-pin SOT23 (Z5-1) pinout and footprint. The only functional differences between variants are output voltage setting and presence/absence of the BP pin (MAX8887 only); MAX8888EZK25+T and MAX8888EZK33+T are mechanically and electrically interchangeable except for regulated output voltage.
MAX8888EZK25+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- 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
MAX8888EZK25+T FAQ
1.How can I place an order for MAX8888EZK25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8888EZK25+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 MAX8888EZK25+T reliable?
The price and inventory of MAX8888EZK25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8888EZK25+T is usually 5 days.
3.What payment methods are accepted for MAX8888EZK25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8888EZK25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8888EZK25+T?
MAX8888EZK25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8888EZK25+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 MAX8888EZK25+T?
For technical support, including MAX8888EZK25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8888EZK25+T requirements.
6.How does Aetrix verify that MAX8888EZK25+T is sourced from the original manufacturer or authorized distributors?
All MAX8888EZK25+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 MAX8888EZK25+T meets industry standards.
7.What is the process for return or replacement of MAX8888EZK25+T?
All MAX8888EZK25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8888EZK25+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 MAX8888EZK25+T part is unused and in its original packaging.
Return procedure for MAX8888EZK25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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