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Analog Devices Inc./Maxim Integrated MAX8888EZK30+T
- Part No.:
- MAX8888EZK30+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8888EZK30+T.pdf
- Description:
- IC REG LINEAR 3V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,992
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Product details
Overview
MAX8888EZK30+T from Maxim Integrated is a low-dropout linear regulator delivering 3.0V fixed output at up to 300mA continuous current, featuring an open-drain power-OK (POK) flag, 100mV dropout at 200mA, 55µA no-load supply current, and thermal/short-circuit protection - deployed in portable battery-powered systems such as wireless handsets and digital cameras.
For engineers reviewing the MAX8888EZK30+T datasheet, MAX8888EZK30+T pinout, MAX8888EZK30+T application, or MAX8888EZK30+T equivalent, key selection considerations include POK functionality, SOT23-5 package compatibility, 3.0V output accuracy (±3%), dropout behavior near battery end-of-life, and shutdown current (<0.1µA).
Technical Context
The MAX8888EZK30+T integrates a p-channel MOSFET pass transistor with 0.5Ω RDS(ON), enabling low dropout and load-independent quiescent current. Its error amplifier compares feedback against a 1.25V internal reference, with factory-trimmed resistive divider setting the 3.0V output.
POK operation is tied to output regulation: it pulls low when VOUT falls below 92.5% of nominal (2.775V), with 1% hysteresis, and remains low during shutdown. The device enters thermal shutdown at +170°C with 20°C hysteresis, supporting safe operation under sustained overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±3% over load (100µA–300mA) and temperature (−40°C to +85°C) |
| Dropout Voltage | 100mV at 200mA load - enables regulation down to 3.1V input, extending usable battery life |
| Supply Current | 55µA no-load; independent of output load due to PMOS pass element |
| POK Threshold | 92.5% of nominal (2.775V) with 1% hysteresis - provides reliable power-good signaling for µC reset sequencing |
| Shutdown Current | 0.1µA max at VIN = 5.5V - preserves battery charge during system sleep modes |
| PSRR | 40dB at 1kHz - suppresses ripple from noisy DC-DC stages feeding the LDO input |
| Thermal Shutdown | Triggers at +170°C junction temperature with 20°C hysteresis - prevents permanent damage during sustained overload |
Pinout & Package
MAX8888EZK30+T is housed in a RoHS-compliant, thin-profile 5-pin SOT23 package (1mm height), optimized for space-constrained portable PCBs.
| 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 | Common return path for IN, OUT, SHDN, and POK; must be low-impedance for noise control |
| 3 - SHDN | Active-low enable control | Pulled low to disable regulator; draws <100nA bias current; tolerant to 6V max voltage |
| 4 - POK | Open-drain power-OK flag | Drives low when VOUT < 2.775V; requires external pullup (e.g., 100kΩ to OUT) for logic-level output |
| 5 - OUT | Regulated 3.0V output | Sources up to 300mA; requires 2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for stability |
Key Features
| Feature | Design Value |
|---|---|
| Open-drain POK output | Enables direct interface with microcontroller reset inputs without level-shifting; supports POR sequencing |
| 55µA quiescent current | Maintains ultra-low power draw across full load range - critical for standby battery life in always-on devices |
| 100mV dropout at 200mA | Allows operation with single-cell Li-ion (3.0V min) or two-cell alkaline (3.2V min) through full discharge cycle |
| Foldback current limiting | Reduces short-circuit current to ~500mA when VOUT drops below 93%, lowering power dissipation during faults |
| Thermal shutdown with hysteresis | Prevents latch-up during overheating; automatic recovery after 20°C cooldown avoids manual reset requirement |
Applications
| Wireless Handsets | Digital Cameras |
|---|---|
|
Use Scenario: Powering baseband processor I/O rails and RF front-end bias circuits during burst transmission. IC Role / Device Role / Timing Role: Primary 3.0V LDO supplying noise-sensitive analog sections; POK signals stable rail to application processor before RF activation. Use Value: 100mV dropout ensures uninterrupted operation as battery decays from 4.2V to 3.1V; 40dB PSRR attenuates switching noise from PMIC DC-DC converters. |
Use Scenario: Supplying image sensor interface circuitry and flash LED driver control logic. IC Role / Device Role / Timing Role: Dedicated 3.0V regulator for CMOS image sensor analog front-end; POK validates rail before frame capture initiation. Use Value: 55µA quiescent current minimizes standby drain; thermal shutdown protects during high-current flash charging sequences. |
| Notebook Subsystems | Hand-Held Instruments |
|
Use Scenario: Powering embedded controller (EC) peripherals and keyboard backlight drivers in ultraportable designs. IC Role / Device Role / Timing Role: Secondary LDO for isolated 3.0V domain; SHDN controlled by EC to gate power during suspend-to-RAM states. Use Value: 0.1µA shutdown current meets ACPI S3 leakage budgets; SOT23-5 footprint saves board area vs. larger regulators. |
Use Scenario: Regulating supply to precision ADC reference buffers and LCD segment drivers in battery-operated test meters. IC Role / Device Role / Timing Role: Low-noise, stable 3.0V source for analog signal chain; POK confirms regulation before measurement sampling. Use Value: ±3% output accuracy ensures consistent ADC reference scaling; foldback current limit prevents meter malfunction during probe short events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78030DDCR | 3.0V fixed output, 200mA max, 1.5µA IQ, no POK output, 175mV dropout at 200mA | Lacks power-good signaling; lower current rating limits use in higher-power subsystems | Select when ultra-low IQ dominates requirements and POK is handled externally |
| MCP1700T-3002E/TT | 3.0V fixed output, 250mA max, 1.6µA IQ, no POK, 600mV dropout at 250mA | Higher dropout reduces usable battery range; no fault-flag capability | Choose for cost-sensitive, non-critical rails where POK and low dropout are not required |
Compared with TPS78030DDCR and MCP1700T-3002E/TT, the MAX8888EZK30+T uniquely delivers 300mA current, 100mV dropout, and integrated POK in a 5-pin SOT23 - making it optimal for space-constrained, battery-powered systems requiring robust power sequencing and extended runtime.
Availability
MAX8888EZK30+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 MAX8888EZK30+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, automotive, and portable applications.
The MAX8888EZK30+T belongs to Maxim's low-dropout linear regulator family engineered specifically for battery-powered portable electronics - prioritizing low quiescent current, small footprint, and integrated power monitoring.
FAQ
What is the output voltage tolerance of the MAX8888EZK30+T over temperature and load?
The MAX8888EZK30+T maintains a 3.0V 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 per the Electrical Characteristics table in the official datasheet. The MAX8888EZK30+T achieves this via factory-trimmed internal feedback resistors and a stable 1.25V reference, ensuring consistent performance in portable equipment like digital cameras and wireless handsets.
Does the MAX8888EZK30+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 MAX8888EZK30+T. The MAX8888EZK30+T uses a different internal architecture that omits the BP pin; its pinout is IN, GND, SHDN, POK, OUT. Therefore, no BP capacitor is needed or supported for the MAX8888EZK30+T, and connecting anything to a non-existent BP terminal would be incorrect.
What is the minimum input voltage required for the MAX8888EZK30+T to maintain regulation at 300mA load?
The MAX8888EZK30+T requires a minimum input voltage of VOUT + VDROPOUT. At 300mA, typical dropout is 150mV (per Electrical Characteristics), so minimum input is 3.15V. However, worst-case dropout is 200mV, requiring ≥3.20V input to guarantee regulation. This ensures reliable operation as single-cell Li-ion batteries discharge from 4.2V down to ~3.2V, making the MAX8888EZK30+T well-suited for portable applications where battery end-of-life voltage matters.
How does the POK output behave during shutdown of the MAX8888EZK30+T?
During shutdown (SHDN = GND), the MAX8888EZK30+T drives both OUT and POK low. The POK pin remains actively pulled low regardless of output voltage state - it does not float or go high-impedance. This behavior provides unambiguous power-fail indication to downstream logic, such as holding a microcontroller in reset until full rail recovery occurs post-shutdown. This deterministic POK behavior is explicitly documented in the Pin Description and Detailed Description sections of the MAX8888EZK30+T datasheet.
Can the MAX8888EZK30+T be used with ceramic output capacitors having ESR above 0.1Ω?
No - the MAX8888EZK30+T requires an output capacitor with ESR ≤ 0.1Ω to ensure stability and optimal transient response, as specified in the Applications Information section. Ceramic capacitors meeting this ESR requirement (e.g., 2.2µF X5R/X7R in 0805 or larger case) are recommended. Using higher-ESR capacitors - such as tantalum or older-generation ceramics - risks oscillation, overshoot, or poor load-step recovery, especially under pulsed loads common in wireless handsets and digital cameras where the MAX8888EZK30+T is typically deployed.
MAX8888EZK30+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):
- 3V
- 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
MAX8888EZK30+T FAQ
1.How can I place an order for MAX8888EZK30+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8888EZK30+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 MAX8888EZK30+T reliable?
The price and inventory of MAX8888EZK30+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8888EZK30+T is usually 5 days.
3.What payment methods are accepted for MAX8888EZK30+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8888EZK30+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8888EZK30+T?
MAX8888EZK30+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8888EZK30+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 MAX8888EZK30+T?
For technical support, including MAX8888EZK30+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8888EZK30+T requirements.
6.How does Aetrix verify that MAX8888EZK30+T is sourced from the original manufacturer or authorized distributors?
All MAX8888EZK30+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 MAX8888EZK30+T meets industry standards.
7.What is the process for return or replacement of MAX8888EZK30+T?
All MAX8888EZK30+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8888EZK30+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 MAX8888EZK30+T part is unused and in its original packaging.
Return procedure for MAX8888EZK30+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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