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Analog Devices Inc./Maxim Integrated MAX8888EZK20+T
- Part No.:
- MAX8888EZK20+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8888EZK20+T.pdf
- Description:
- IC REG LINEAR 2V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,244
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Product details
Overview
MAX8888EZK20+T from Maxim Integrated is a low-dropout linear regulator delivering up to 300mA continuous output current with 100mV dropout at 200mA, 2.0V fixed output voltage, and open-drain power-OK (POK) flag for system monitoring. It operates from 2.5V–5.5V input and features 55µA no-load supply current, thermal shutdown, and short-circuit protection-designed for battery-powered portable electronics including wireless handsets and PDAs.
For engineers reviewing the MAX8888EZK20+T datasheet, MAX8888EZK20+T pinout, MAX8888EZK20+T application, or MAX8888EZK20+T equivalent, key selection criteria include guaranteed 300mA load capability, POK flag timing behavior, dropout performance near end-of-battery life, and SOT23-5 footprint compatibility in space-constrained designs.
Technical Context
The MAX8888EZK20+T uses an internal p-channel MOSFET pass transistor with ~0.5Ω RDS(ON), enabling low dropout and load-independent 55µA quiescent current. Its error amplifier compares feedback from an internal 1.25V reference and fixed resistor divider to regulate 2.0V output.
POK functionality is implemented via an open-drain n-channel output that asserts low when VOUT falls below 92.5% of nominal (1.85V), with 1% typical hysteresis. Shutdown is active-low on SHDN, reducing supply current to ≤0.1µA while forcing OUT and POK low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0V ±3% over -40°C to +85°C and 100µA–300mA load - ensures stable core logic or analog rail without external resistors. |
| Dropout Voltage | 100mV at 200mA load - enables operation down to 2.1V input, extending usable battery life in single-cell Li-ion or dual-cell alkaline systems. |
| Max Output Current | 300mA continuous, 500mA pulsed - supports burst-mode RF transceivers or display drivers without thermal derating under typical PCB layout. |
| Quiescent Current | 55µA at no load, independent of output current - minimizes standby drain in always-on subsystems like real-time clocks or sensor interfaces. |
| POK Threshold | 92.5% of nominal VOUT (1.85V) with 1% hysteresis - provides clean, glitch-free power-good assertion for µC reset sequencing. |
| PSRR @ 1kHz | 40dB - suppresses switching noise from adjacent DC/DC converters feeding the LDO input, critical for ADC or RF bias rails. |
| Shutdown Current | ≤0.1µA with SHDN = GND - meets ultra-low-power requirements for IoT endpoint sleep modes. |
Pinout & Package
MAX8888EZK20+T is housed in a thin 5-pin SOT23 package (1mm height, Z5-1 outline), optimized for high-density portable PCB layouts.
| 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 both input and output currents; must be connected directly to PCB ground plane. |
| 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-OK flag | Drives low when VOUT < 1.85V; requires external pullup (e.g., 100kΩ to VOUT) for logic-level signaling to µC reset pin. |
| 5 - OUT | Regulated output | Delivers 2.0V at up to 300mA; requires ≥2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for stability and noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Open-drain POK output | Enables flexible reset signaling with user-selectable pullup voltage and optional RC delay for power sequencing compliance. |
| 55µA no-load ground current | Maintains ultra-low quiescent consumption across full load range, eliminating efficiency penalty at light loads common in PNP-based LDOs. |
| Thermal shutdown with 20°C hysteresis | Prevents permanent damage during sustained overload; cycles ON/OFF to limit junction temperature to ≤150°C for safe intermittent operation. |
| 0.1µA shutdown current | Reduces battery leakage to negligible levels during system sleep, supporting multi-year shelf life in coin-cell–powered devices. |
| 40dB PSRR at 1kHz | Attenuates ripple from upstream switching regulators, preserving signal integrity in mixed-signal SoC power domains. |
Applications
| Wireless Handsets | Digital Cameras |
|---|---|
Use Scenario: Powering baseband processor I/O banks and camera interface circuitry during active capture mode. IC Role / Device Role / Timing Role: Primary 2.0V LDO supplying noise-sensitive digital interfaces with fast load-transient response. Use Value: 100mV dropout allows continued regulation as Li-ion voltage drops to 2.1V, extending talk time by >12% versus higher-dropout alternatives. |
Use Scenario: Supplying image sensor analog front-end and ISP core logic during high-speed burst capture. IC Role / Device Role / Timing Role: Low-noise, high-PSRR 2.0V rail generator decoupled from noisy DC/DC converter outputs. Use Value: 40dB PSRR at 1kHz suppresses switching artifacts that would otherwise manifest as fixed-pattern noise in captured images. |
| Notebook Subsystems | Hand-Held Instruments |
Use Scenario: Providing standby power to embedded controller (EC) and keyboard controller in S3/S4 sleep states. IC Role / Device Role / Timing Role: Always-on 2.0V regulator with POK flag used for EC wake-up validation and brownout detection. Use Value: 0.1µA shutdown current limits annual battery drain to <1% in RTC backup circuits, ensuring reliable resume after long storage. |
Use Scenario: Powering precision ADC reference buffers and op-amp signal chains in portable multimeters. IC Role / Device Role / Timing Role: Stable, low-drift 2.0V reference source with tight ±3% output accuracy over temperature and load. Use Value: Output voltage accuracy maintained within ±3% across -40°C to +85°C enables direct use without calibration compensation in Class II handheld meters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B202MR-G | 2.0V fixed output, 300mA, 120mV dropout at 200mA, no POK output, 1.0µA quiescent current | Lacks power-OK flag; requires external monitoring circuit for reset generation | Select when POK is unnecessary and lowest possible BOM count is prioritized over system-level fault detection. |
| Analog Devices ADP125ARZ-2.0-R7 | 2.0V fixed output, 500mA, 135mV dropout at 300mA, no POK, 30µA quiescent current, integrated soft-start | Higher current rating but larger 6-lead SOT23-6 footprint and no POK flag | Choose when higher peak load capability is required and board area permits larger package; not drop-in compatible. |
Compared with MAX8888EZK20+T, the XC6219B202MR-G offers lower cost but omits critical system-monitoring functionality, while the ADP125ARZ-2.0-R7 trades POK capability for higher current and soft-start-neither matches the precise 2.0V/POK/SOT23-5 combination of MAX8888EZK20+T for compact, self-monitoring portable designs.
Availability
MAX8888EZK20+T is available at Aetrix Electronics and suitable for wireless handsets, digital cameras, notebook subsystems, hand-held instruments, and PCMCIA cards requiring stable component supply with RoHS-compliant packaging and automotive-grade traceability options.
Supply support for MAX8888EZK20+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 MAX8888EZK20+T belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-powered portable equipment where ultra-low quiescent current, small footprint, and integrated power monitoring are essential design requirements.
FAQ
What is the output voltage tolerance of the MAX8888EZK20+T over temperature and load?
The MAX8888EZK20+T maintains output voltage within ±3% over the full operating range of -40°C to +85°C and for load currents from 100µA to 300mA. This specification is guaranteed by design and verified across temperature and process corners-not just at +25°C-ensuring consistent performance in real-world portable device environments where thermal cycling and variable load profiles occur.
Does the MAX8888EZK20+T require external components for stable operation?
Yes, the MAX8888EZK20+T requires two external ceramic capacitors: a minimum 2.2µF capacitor between IN and GND, and a minimum 2.2µF capacitor between OUT and GND, both with ESR ≤0.1Ω. These are mandatory for loop stability, transient response, and PSRR performance. The POK pin also requires an external pullup resistor (e.g., 100kΩ to VOUT) to generate a logic-level signal.
How does the POK output behave during shutdown of the MAX8888EZK20+T?
During shutdown (SHDN = GND), the MAX8888EZK20+T actively drives the POK pin low, regardless of output voltage level. This ensures deterministic reset signaling to downstream logic-even if the output capacitor retains residual charge-providing reliable power sequencing control in systems where controlled startup/shutdown sequences are critical.
What is the maximum allowable input voltage for the MAX8888EZK20+T?
The absolute maximum input voltage for the MAX8888EZK20+T is +7V applied to the IN pin relative to GND. However, the recommended operating input voltage range is 2.5V to 5.5V. Exceeding 5.5V may cause excessive power dissipation or violate thermal limits, especially at high output currents-operation above 5.5V is only permitted for brief transients per Absolute Maximum Ratings.
Can the MAX8888EZK20+T be used in automotive applications?
The standard MAX8888EZK20+T is rated for -40°C to +85°C and is not qualified to AEC-Q200. However, Maxim offers an automotive-grade variant designated MAX8888EZK20/V+T, which undergoes additional testing and screening for automotive use. For non-automotive industrial or consumer applications, the MAX8888EZK20+T is fully suitable and widely deployed in handheld and portable equipment.
MAX8888EZK20+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):
- 2V
- 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
MAX8888EZK20+T FAQ
1.How can I place an order for MAX8888EZK20+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8888EZK20+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 MAX8888EZK20+T reliable?
The price and inventory of MAX8888EZK20+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8888EZK20+T is usually 5 days.
3.What payment methods are accepted for MAX8888EZK20+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8888EZK20+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8888EZK20+T?
MAX8888EZK20+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8888EZK20+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 MAX8888EZK20+T?
For technical support, including MAX8888EZK20+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8888EZK20+T requirements.
6.How does Aetrix verify that MAX8888EZK20+T is sourced from the original manufacturer or authorized distributors?
All MAX8888EZK20+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 MAX8888EZK20+T meets industry standards.
7.What is the process for return or replacement of MAX8888EZK20+T?
All MAX8888EZK20+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8888EZK20+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 MAX8888EZK20+T part is unused and in its original packaging.
Return procedure for MAX8888EZK20+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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