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Analog Devices Inc./Maxim Integrated MAX8888EZK27+T
- Part No.:
- MAX8888EZK27+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8888EZK27+T.pdf
- Description:
- IC REG LIN 2.7V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,729
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Product details
Overview
MAX8888EZK27+T from Maxim Integrated is a low-dropout linear regulator delivering up to 300mA continuous output current with 100mV dropout at 200mA, 2.7V fixed output voltage, and an open-drain power-OK (POK) flag for system monitoring in battery-powered portable electronics.
For engineers reviewing the MAX8888EZK27+T datasheet, MAX8888EZK27+T pinout, MAX8888EZK27+T application, or MAX8888EZK27+T equivalent, this device is selected for compact, low-noise, regulated power delivery where supply voltage margin is constrained and power-good signaling is required for microcontroller reset sequencing or system enable control.
Technical Context
The MAX8888EZK27+T employs an internal p-channel MOSFET pass transistor with 0.5Ω RDS(ON), enabling ultra-low quiescent current (55µA no-load) independent of load and eliminating base-drive losses typical of PNP-based LDOs. Its architecture supports operation down to 2.5V input while maintaining regulation at VOUT = 2.7V.
It integrates thermal shutdown (170°C trip, 20°C hysteresis), foldback current limiting (420mA typical at nominal VOUT, reduced under undervoltage), and a dedicated open-drain POK output that asserts low when VOUT falls below 92.5% of 2.7V - all within a 5-pin SOT23 package with 1mm profile.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.7V ±3% over temperature and load - ensures stable core/peripheral rail without external feedback components. |
| Max Continuous Output Current | 300mA - sufficient for powering baseband processors, RF transceivers, or sensor subsystems in handheld devices. |
| Dropout Voltage | 100mV at 200mA - enables operation down to VIN = 2.8V, extending usable battery life in single-cell Li-ion or Li-poly systems. |
| Quiescent Current | 55µA at no load - minimizes standby power loss critical for always-on functions in portable equipment. |
| POK Threshold Accuracy | 92.5% of nominal VOUT (±2.5%) - provides precise undervoltage detection for reliable power-on-reset timing. |
| Shutdown Current | 0.1µA - reduces system leakage during deep sleep modes without requiring external discharge circuitry. |
| PSRR @ 1kHz | 40dB - suppresses ripple from noisy switch-mode supplies feeding the LDO input, improving analog/RF subsystem performance. |
Pinout & Package
MAX8888EZK27+T is housed in a RoHS-compliant, lead-free 5-pin SOT23 package (1mm height, Z5-1 outline), optimized for high-density PCB layouts in space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input Supply Rail | Accepts 2.5V–5.5V input; requires ≥2.2µF ceramic bypass to GND for stability and transient response. |
| 2 - GND | Analog & Power Ground | Common reference for regulation loop, POK comparator, and thermal sensing; must be low-impedance connection. |
| 3 - SHDN | Active-Low Enable Control | Logic-low disables regulator and forces OUT/POK low; driven high (≥1.6V) for normal operation; tolerates up to 6V. |
| 4 - POK | Open-Drain Power-Good Flag | Asserts low when VOUT < 92.5% of 2.7V; requires external pullup (e.g., 100kΩ to OUT) for logic-level interface with µC reset pins. |
| 5 - OUT | Regulated Output | Delivers 2.7V ±3% at up to 300mA; requires ≥2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated POK output | Enables autonomous system-level power sequencing and reset generation without external supervisor ICs. |
| p-Channel MOSFET pass element | Eliminates base-drive current, ensuring 55µA quiescent current remains constant across full load range including dropout. |
| Foldback current limiting | Reduces short-circuit current to ~500mA when VOUT drops below 93%, lowering power dissipation during fault conditions. |
| Thermal shutdown with hysteresis | Shuts down at 170°C junction temperature and re-enables only after cooling by 20°C, preventing thermal oscillation during sustained overload. |
| Low-noise compatible design | Supports optional BP pin bypass (not used in MAX8888); layout and capacitor selection enable <100µVRMS noise in sensitive analog rails. |
Applications
| Wireless Handsets | Digital Cameras |
|---|---|
Use Scenario: Powering baseband processor I/O and RF front-end bias rails in GSM/UMTS handsets with tight battery voltage swing. IC Role / Device Role / Timing Role: Primary 2.7V LDO with POK signaling to coordinate boot sequence and prevent firmware execution before stable supply. Use Value: 100mV dropout extends operational time from 3.0V to 2.8V battery voltage, directly increasing talk-time per charge cycle. |
Use Scenario: Supplying image sensor analog core and ISP logic in compact digital cameras with single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-quiescent, low-noise 2.7V regulator with POK used as POR signal to initialize sensor configuration registers. Use Value: 55µA no-load current minimizes standby drain during lens retraction and flash charging phases. |
| Notebook Subsystems | Hand-Held Instruments |
Use Scenario: Providing auxiliary 2.7V rail for embedded controller, keyboard backlight driver, or USB PHY in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary LDO with integrated POK for fault-aware power management in multi-rail architectures. Use Value: Open-drain POK allows wired-OR connection with other system supervisors, simplifying centralized reset tree design. |
Use Scenario: Regulating power for precision ADC reference buffers and low-power microcontrollers in battery-operated multimeters or data loggers. IC Role / Device Role / Timing Role: Stable, low-drift 2.7V source with thermal protection to maintain measurement accuracy under varying ambient conditions. Use Value: ±3% output accuracy and 0.1µA shutdown current ensure calibration integrity and multi-year shelf life on primary cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P272MR | 2.7V fixed, 150mA max, no POK output, 350mV dropout at 100mA | Lacks power-good signaling; unsuitable where system reset coordination is required | Select only if POK is unused and load current ≤150mA; smaller footprint but higher dropout limits battery utilization. |
| Analog Devices ADP160ACBZ-2.7-R7 | 2.7V fixed, 150mA max, no POK, 195mV dropout at 150mA, 1.8µA quiescent | Lower IQ but halved current capability and missing POK; not drop-in for 300mA or reset-critical use cases | Prefer for ultra-low-power sensor nodes where 150mA suffices and POK is omitted; requires PCB redesign due to different pinout. |
Compared with XC6206P272MR and ADP160ACBZ-2.7-R7, the MAX8888EZK27+T uniquely combines 300mA drive, 100mV dropout, and integrated POK in a 5-pin SOT23 - making it irreplaceable in space-constrained, battery-sensitive systems requiring both high current and deterministic power sequencing.
Availability
MAX8888EZK27+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 MAX8888EZK27+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) 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 MAX8888EZK27+T belongs to Maxim's low-dropout linear regulator product line, engineered specifically for portable battery-powered equipment where minimal dropout, low quiescent current, and integrated power-good signaling are essential for system reliability and energy efficiency.
FAQ
What is the output voltage tolerance of the MAX8888EZK27+T over temperature and load?
The MAX8888EZK27+T delivers a nominal 2.7V output with ±3% accuracy across the full operating temperature range (-40°C to +85°C) and load current (100µA to 300mA). This specification is guaranteed by design and verified during production testing at +25°C, with worst-case deviation bounded by process and layout tolerances.
Does the MAX8888EZK27+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 functional in the MAX8888EZK27+T. The MAX8888EZK27+T does not incorporate the BP pin circuitry; pin 4 is assigned to POK. Therefore, no capacitor is needed or recommended on BP for MAX8888EZK27+T.
What is the minimum input voltage required for the MAX8888EZK27+T to maintain regulation at full load?
At 300mA load, the MAX8888EZK27+T requires VIN ≥ 2.85V to maintain regulation, based on its maximum dropout voltage of 150mV (typical 100mV at 200mA, rising with current). Below this threshold, output voltage collapses proportionally with input, and the POK output asserts low.
How does the POK output behave during shutdown of the MAX8888EZK27+T?
When SHDN is pulled low, the MAX8888EZK27+T enters shutdown mode: the output (OUT) is disconnected and driven low, and the POK pin is actively pulled low regardless of output voltage level. This ensures a defined reset state for downstream logic during power-down sequences.
Can the MAX8888EZK27+T be used with ceramic output capacitors having ESR above 0.1Ω?
No - the MAX8888EZK27+T requires an output capacitor with ESR ≤ 0.1Ω (e.g., standard X5R/X7R ceramic) to ensure loop stability and optimal transient response. Higher ESR may cause oscillation or excessive overshoot during load steps, as confirmed by stability analysis in the datasheet's capacitor selection guidelines.
MAX8888EZK27+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:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.7V
- 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
MAX8888EZK27+T FAQ
1.How can I place an order for MAX8888EZK27+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8888EZK27+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 MAX8888EZK27+T reliable?
The price and inventory of MAX8888EZK27+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8888EZK27+T is usually 5 days.
3.What payment methods are accepted for MAX8888EZK27+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8888EZK27+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8888EZK27+T?
MAX8888EZK27+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8888EZK27+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 MAX8888EZK27+T?
For technical support, including MAX8888EZK27+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8888EZK27+T requirements.
6.How does Aetrix verify that MAX8888EZK27+T is sourced from the original manufacturer or authorized distributors?
All MAX8888EZK27+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 MAX8888EZK27+T meets industry standards.
7.What is the process for return or replacement of MAX8888EZK27+T?
All MAX8888EZK27+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8888EZK27+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 MAX8888EZK27+T part is unused and in its original packaging.
Return procedure for MAX8888EZK27+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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