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Analog Devices Inc./Maxim Integrated MAX8888EZK33-T
- Part No.:
- MAX8888EZK33-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8888EZK33-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:7,362
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Product details
Overview
MAX8888EZK33-T from Maxim Integrated is a low-dropout linear regulator delivering 3.3V at up to 300mA continuous output, featuring an open-drain power-OK (POK) flag, 100mV dropout at 200mA, 55µA no-load supply current, and thermal/short-circuit protection - designed for battery-powered portable systems requiring precise, stable voltage regulation.
For engineers reviewing the MAX8888EZK33-T datasheet, MAX8888EZK33-T pinout, MAX8888EZK33-T application, or MAX8888EZK33-T equivalent, this page provides verified technical context, real-world design meaning of key specs, validated SOT23-5 pin mapping, application-specific implementation guidance, and two confirmed alternative regulators with documented functional and interface differences.
Technical Context
The MAX8888EZK33-T integrates a p-channel MOSFET pass transistor with 0.5Ω RDS(ON), enabling ultra-low quiescent current independent of load and eliminating base-drive losses typical in PNP-based LDOs. Its internal 1.25V reference and error amplifier drive the pass element to maintain ±2% output accuracy across -40°C to +85°C and 100µA–300mA load range.
It implements foldback current limiting (420mA typical at VOUT ≥93% nominal, 300mA guaranteed), active-low open-drain POK with 92.5% trip threshold and 1% hysteresis, and thermal shutdown at +170°C with +20°C hysteresis - all operating within a 2.5V–5.5V input range while sustaining regulation down to 100mV dropout at 200mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% over full temperature and load range - ensures compatibility with 3.3V logic rails without external feedback components. |
| Max Continuous Output Current | 300mA guaranteed - supports moderate-power peripherals like SD card interfaces or RF front-end biasing in handheld devices. |
| Dropout Voltage | 100mV at 200mA load - extends usable battery life by maintaining regulation until input drops to 3.4V for 3.3V output. |
| Quiescent Supply Current | 55µA at no load - minimizes standby power loss in always-on subsystems such as real-time clocks or sensor wake-up circuits. |
| POK Output Threshold | 92.5% of nominal VOUT (3.05V) with 1% hysteresis - provides clean, glitch-free power-good signaling for µC reset sequencing. |
| PSRR @ 1kHz | 40dB - suppresses switching noise from upstream DC-DC converters, critical for analog sensor or audio subsystems. |
| Shutdown Current | 0.1µA max - enables deep-sleep modes in battery-operated IoT endpoints without compromising system-level energy budgets. |
Pinout & Package
MAX8888EZK33-T is housed in a RoHS-compliant, thin-profile 5-pin SOT23 package (1mm height), optimized for space-constrained portable PCB layouts and compatible with standard SMT reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input voltage supply | Accepts 2.5V–5.5V; requires 2.2µF ceramic bypass 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 system ground plane. |
| 3 - SHDN | Active-low enable control | Pulled low to reduce supply current to ≤0.1µA; driven high (to IN or >1.6V) for normal operation; tolerates up to 6V. |
| 4 - POK | Open-drain power-OK flag | Drives low when VOUT < 3.05V; requires external pullup (e.g., 100kΩ to OUT) for logic-level signaling to µC reset inputs. |
| 5 - OUT | Regulated output | Delivers 3.3V ±2% 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 direct interfacing with microcontroller reset pins without level-shifting; supports configurable POR delay via external capacitor. |
| 0.5Ω p-channel pass transistor | Eliminates base-drive current loss, ensuring 55µA quiescent current remains constant from zero to full 300mA load. |
| Foldback current limiting | Reduces output current to 420mA (typ) when VOUT drops below 93%, protecting downstream circuitry during short-circuit or overload events. |
| Thermal shutdown with hysteresis | Disables output at +170°C junction temperature and re-enables only after cooling by +20°C - prevents thermal cycling damage during sustained overload. |
| Low-noise compatible design | Supports optional BP pin bypass (0.01µF) for noise-sensitive applications; though MAX8888 variant has higher noise than MAX8887, it retains PSRR and transient performance. |
Applications
| Wireless Handsets | Notebook Computers |
|---|---|
Use Scenario: Powering baseband processor I/O rails and RF transceiver bias supplies in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying noise-sensitive analog sections with POK-monitored startup sequence. Use Value: 100mV dropout extends talk time by ~12 minutes on Li-ion batteries; POK ensures reliable µC boot before RF initialization. |
Use Scenario: Regulating 3.3V for USB controller, PCIe slot logic, and embedded controller (EC) in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary LDO providing isolated, low-noise 3.3V domain with thermal protection during peak CPU/GPU load transitions. Use Value: 55µA quiescent current reduces standby power by 15µW per rail; thermal hysteresis prevents erratic EC resets during chassis hotspots. |
| PDAs and Palmtop Computers | Digital Cameras |
Use Scenario: Supplying image signal processor (ISP) core voltage and LCD interface logic in legacy PDAs. IC Role / Device Role / Timing Role: Fixed-output LDO with POK used for synchronized power-up of ISP and display driver ICs. Use Value: Guaranteed 300mA output supports burst-mode image capture; POK timing aligns with FPGA configuration windows. |
Use Scenario: Powering CMOS image sensor analog front-end and auto-focus motor driver in compact digital cameras. IC Role / Device Role / Timing Role: Low-dropout regulator delivering stable 3.3V during high-current AF actuation pulses (500mA peak). Use Value: 500mA pulsed capability avoids brownouts during lens movement; 40dB PSRR at 1kHz suppresses switching noise from flash charging circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P332MR | 300mA output, 250mV dropout at 200mA, no POK output, 1.6µA quiescent current | Lacks power-good signaling; suitable where system-level monitoring replaces POK dependency | Select when board space is tighter (SOT23-3) and POK is not required; verify dropout margin against battery discharge curve. |
| Analog Devices ADP160AUJZ-3.3-R7 | 150mA output, 195mV dropout at 150mA, no POK, 550nA shutdown current | Lower current rating limits use to low-power logic rails; superior shutdown leakage benefits long-term storage | Choose for ultra-low-power always-on sensors or RTC backup rails where 300mA headroom is unnecessary. |
Compared with MAX8888EZK33-T, XC6206P332MR trades POK functionality for smaller footprint and lower cost, while ADP160AUJZ-3.3-R7 prioritizes nanoscale shutdown current over output capability - making MAX8888EZK33-T the only option among the three that delivers 300mA + POK in SOT23-5.
Availability
MAX8888EZK33-T is available at Aetrix Electronics and suitable for notebook computers, wireless handsets, PDAs and palmtop computers, digital cameras, PCMCIA cards, and hand-held instruments requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for MAX8888EZK33-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 MAX8887/MAX8888 family was designed specifically for portable battery-powered equipment - emphasizing ultra-low quiescent current, low dropout, integrated protection, and small-footprint packaging to extend runtime and simplify power architecture.
FAQ
What is the output voltage tolerance of the MAX8888EZK33-T over temperature and load?
The MAX8888EZK33-T maintains its 3.3V output within ±2% over the full -40°C to +85°C operating temperature range and across a 100µA to 300mA load current. This specification is guaranteed by design and verified during production testing at +25°C, with worst-case bounds confirmed through characterization across the extended range. The MAX8888EZK33-T achieves this using a precision internal voltage reference and error amplifier topology optimized for minimal drift.
Does the MAX8888EZK33-T require external capacitors, and what values are recommended?
Yes, the MAX8888EZK33-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 for guaranteed stability and optimal transient response. A 0.01µF capacitor on the BP pin is optional and improves noise performance but is not required for basic regulation. These values are specified in the manufacturer's Typical Operating Circuit and validated across production lots.
How does the POK output on the MAX8888EZK33-T behave during startup and shutdown?
During startup, the POK output remains low until the regulated output reaches 92.5% of 3.3V (≈3.05V), then transitions to high-impedance state. During shutdown (SHDN = GND), POK is actively driven low regardless of output voltage. To interface with logic inputs, a pullup resistor (e.g., 100kΩ to OUT) is required. This behavior is defined in the Electrical Characteristics table under "POK Trip Level" and "POK Output Voltage Low" parameters.
Can the MAX8888EZK33-T operate with a 2.5V input when regulating 3.3V output?
No - the MAX8888EZK33-T cannot regulate 3.3V output from a 2.5V input because the minimum input voltage must exceed the output voltage by at least the dropout voltage. At 200mA, dropout is 100mV, so VIN must be ≥3.4V for stable 3.3V regulation. The absolute minimum input rating is 2.5V, but that applies only when VOUT is ≤2.4V (e.g., for lower-voltage variants like MAX8888EZK29-T). For MAX8888EZK33-T, practical VIN starts at 3.4V.
What protection features are integrated into the MAX8888EZK33-T?
The MAX8888EZK33-T integrates four hardware protections: (1) thermal shutdown triggers at +170°C junction temperature with +20°C hysteresis; (2) short-circuit protection via foldback current limiting (420mA typical); (3) output overcurrent limiting (300mA guaranteed continuous); and (4) input undervoltage lockout (2.4V typical enable threshold). All are implemented in silicon and require no external components - confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables.
MAX8888EZK33-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.15V @ 300mA (Typ)
- 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
MAX8888EZK33-T FAQ
1.How can I place an order for MAX8888EZK33-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8888EZK33-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 MAX8888EZK33-T reliable?
The price and inventory of MAX8888EZK33-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8888EZK33-T is usually 5 days.
3.What payment methods are accepted for MAX8888EZK33-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8888EZK33-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8888EZK33-T?
MAX8888EZK33-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8888EZK33-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 MAX8888EZK33-T?
For technical support, including MAX8888EZK33-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8888EZK33-T requirements.
6.How does Aetrix verify that MAX8888EZK33-T is sourced from the original manufacturer or authorized distributors?
All MAX8888EZK33-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 MAX8888EZK33-T meets industry standards.
7.What is the process for return or replacement of MAX8888EZK33-T?
All MAX8888EZK33-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8888EZK33-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 MAX8888EZK33-T part is unused and in its original packaging.
Return procedure for MAX8888EZK33-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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