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Analog Devices Inc./Maxim Integrated MAX8888EZK17+T
- Part No.:
- MAX8888EZK17+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8888EZK17+T.pdf
- Description:
- IC REG LIN 1.7V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,224
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Product details
Overview
MAX8888EZK17+T from Maxim Integrated is a low-dropout linear regulator delivering up to 300mA continuous output current with 100mV dropout at 200mA, 1.7V fixed output voltage, and open-drain power-OK (POK) flag - designed for battery-powered portable electronics including wireless handsets and PDAs.
For engineers reviewing the MAX8888EZK17+T datasheet, MAX8888EZK17+T pinout, MAX8888EZK17+T application, or MAX8888EZK17+T equivalent, key selection criteria include guaranteed 300mA load capability, POK functionality for system power sequencing, thermal/short-circuit protection, and SOT23-5 package compatibility in space-constrained designs.
Technical Context
The MAX8888EZK17+T integrates a p-channel MOSFET pass transistor with 0.5Ω RDS(ON), enabling low dropout and load-independent 55µA quiescent current. Its internal 1.25V reference and error amplifier regulate output precisely across temperature and line variations.
It features active-low open-drain POK that asserts when VOUT falls below 92.5% of nominal (1.7V), with 1% hysteresis and valid operation down to 1.0V input. 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 1.7V ±3% over -40°C to +85°C - ensures stable core voltage for 1.8V-tolerant logic rails with margin. |
| Max Continuous Output Current | 300mA - supports moderate-power RF modules or baseband processors without external heatsinking. |
| Dropout Voltage | 100mV at 200mA - enables regulation down to VIN = 1.8V, extending usable battery life in single-cell Li-ion systems. |
| Quiescent Current | 55µA at no load - minimizes standby drain in always-on subsystems like real-time clocks or sensor interfaces. |
| POK Threshold Accuracy | 92.5% of VOUT (±2.5%) - provides reliable power-good signaling for µC reset assertion before brownout. |
| PSRR | 40dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding shared input rails. |
| Shutdown Current | 0.1µA - enables deep-sleep modes compliant with ultra-low-power IoT device requirements. |
Pinout & Package
MAX8888EZK17+T is housed in a RoHS-compliant, lead-free 5-pin SOT23 package (1mm height), optimized for high-density PCB layouts in portable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input Supply | Accepts 2.5V–5.5V input; requires 2.2µF ceramic bypass capacitor to GND for stability and transient response. |
| 2 GND | Ground Reference | Common return path for input, output, and internal circuitry; must be low-impedance connection to minimize noise coupling. |
| 3 SHDN | Active-Low Enable | Pulled low to enter 0.1µA shutdown; driven high (≥1.6V) for normal operation; tolerates up to 6V regardless of VIN/VOUT. |
| 4 POK | Open-Drain Power-OK Flag | Asserts low when VOUT < 92.5% of 1.7V; requires external pullup (e.g., 100kΩ to VOUT) for logic-level interface to µC reset pin. |
| 5 OUT | Regulated Output | Delivers up to 300mA at 1.7V; requires 2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for loop stability and noise filtering. |
Key Features
| Feature | Design Value |
|---|---|
| p-Channel MOSFET Pass Transistor | Eliminates base-drive current loss, maintaining 55µA quiescent current even at full 300mA load and in dropout. |
| Foldback Current Limiting | Reduces current limit from 500mA (pulsed) to 420mA when VOUT drops below 93%, protecting against sustained overload. |
| Thermal Shutdown with Hysteresis | Shuts down at 170°C junction temperature and re-enables only after cooling by 20°C, preventing thermal oscillation during overload. |
| Low-Noise Input Rejection | 40dB PSRR at 1kHz enables clean 1.7V supply in noisy environments such as cellular RF front-ends. |
| Valid POK Operation Down to 1.0V Input | Allows reliable power monitoring even during deep battery discharge, supporting graceful system shutdown. |
Applications
| Wireless Handsets | Digital Cameras |
|---|---|
|
Use Scenario: Powering baseband processor I/O banks requiring stable 1.7V rail during burst transmission. IC Role / Device Role / Timing Role: Primary LDO supplying regulated 1.7V to interface logic, with POK synchronized to modem power-up sequence. Use Value: 100mV dropout extends talk time by enabling operation until battery reaches 1.8V, while POK ensures µC initialization only after rail stabilization. |
Use Scenario: Supplying image sensor analog front-end and ADC reference circuitry in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO providing clean 1.7V bias; POK signals sensor readiness to main controller. Use Value: 55µA quiescent current minimizes standby drain during sleep mode, and 40dB PSRR prevents switching noise from affecting image quality. |
| Notebook Subsystems | Hand-Held Instruments |
|
Use Scenario: Powering embedded controller (EC) or keyboard controller in ultraportable notebooks with tight thermal budgets. IC Role / Device Role / Timing Role: Secondary LDO delivering 1.7V to EC core; POK used as POR signal to coordinate firmware boot timing. Use Value: Thermal shutdown (170°C) and foldback current limiting prevent damage during accidental short-circuits on densely routed daughterboards. |
Use Scenario: Regulating supply for precision analog front-end (AFE) and microcontroller in battery-operated multimeters or data loggers. IC Role / Device Role / Timing Role: High-accuracy LDO ensuring 1.7V reference stability across temperature; POK validates rail integrity before measurement sampling. Use Value: ±3% output accuracy and 92.5% POK threshold enable reliable low-voltage detection without external supervision circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B172MR-G | 1.7V fixed output, 300mA, 150mV dropout at 200mA, no POK output, 25µA IQ | Lacks power-good signaling; suitable where system-level monitoring replaces POK dependency | Select when POK is unnecessary and lower quiescent current is prioritized over dropout performance |
| Diodes Inc. AP7361-17SG-13 | 1.7V fixed output, 300mA, 250mV dropout at 300mA, active-high POK, 60µA IQ | Active-high POK requires level-shifting or logic inversion; higher dropout limits low-VIN operation | Choose when active-high reset signaling aligns with existing µC interface and input voltage margin exceeds 2.0V |
Compared with XC6219B172MR-G and AP7361-17SG-13, the MAX8888EZK17+T uniquely combines 100mV dropout at 200mA with an open-drain POK referenced to its own output, enabling direct, self-consistent power monitoring without external components or voltage translation.
Availability
MAX8888EZK17+T is available at Aetrix Electronics and suitable for wireless handsets, digital cameras, notebook subsystems, and hand-held instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8888EZK17+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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX8888EZK17+T belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-powered portable equipment demanding ultra-low quiescent current, tight output accuracy, and integrated power supervision.
FAQ
What is the output voltage tolerance of the MAX8888EZK17+T over temperature and load?
The MAX8888EZK17+T maintains ±3% output voltage accuracy across 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 in production testing, ensuring reliable 1.7V regulation for sensitive analog and digital circuits without external trimming.
Does the MAX8888EZK17+T require external capacitors, and what values are recommended?
Yes, the MAX8888EZK17+T 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 capacitors ensure loop stability, reduce output noise, and improve transient response - omitting or undersizing them risks oscillation or poor regulation under dynamic load conditions.
How does the POK output of the MAX8888EZK17+T behave during shutdown?
During shutdown (SHDN = GND), the MAX8888EZK17+T 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 ensures clean, synchronized power-down sequencing in systems where POK is used for microcontroller reset or state machine control.
What is the maximum input voltage the MAX8888EZK17+T can tolerate on the IN pin?
The MAX8888EZK17+T supports an absolute maximum input voltage of +7V on the IN pin relative to GND. However, its functional operating range is specified from 2.5V to 5.5V. Exceeding 5.5V may cause excessive power dissipation or thermal stress, and operation above 7V risks permanent damage per the Absolute Maximum Ratings table in the datasheet.
Is the MAX8888EZK17+T pin-compatible with other variants in the MAX8887/MAX8888 family?
Yes, all MAX8887/MAX8888 variants, including MAX8888EZK17+T, share identical 5-pin SOT23 pinouts and electrical footprints. The only functional differences between variants are output voltage setting (encoded in the suffix) and presence/absence of the POK pin - MAX8887 lacks POK (pin 4 is BP), while MAX8888 uses pin 4 for POK and omits BP. Layout reuse is possible within the same device type.
MAX8888EZK17+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):
- 1.7V
- 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
MAX8888EZK17+T FAQ
1.How can I place an order for MAX8888EZK17+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8888EZK17+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 MAX8888EZK17+T reliable?
The price and inventory of MAX8888EZK17+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8888EZK17+T is usually 5 days.
3.What payment methods are accepted for MAX8888EZK17+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8888EZK17+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8888EZK17+T?
MAX8888EZK17+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8888EZK17+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 MAX8888EZK17+T?
For technical support, including MAX8888EZK17+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8888EZK17+T requirements.
6.How does Aetrix verify that MAX8888EZK17+T is sourced from the original manufacturer or authorized distributors?
All MAX8888EZK17+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 MAX8888EZK17+T meets industry standards.
7.What is the process for return or replacement of MAX8888EZK17+T?
All MAX8888EZK17+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8888EZK17+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 MAX8888EZK17+T part is unused and in its original packaging.
Return procedure for MAX8888EZK17+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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