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Analog Devices Inc./Maxim Integrated MAX8888EZK33
- Part No.:
- MAX8888EZK33
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8888EZK33.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:965
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Product details
Overview
MAX8888EZK33 from Maxim Integrated is a fixed-output 3.3V, 300mA low-dropout linear regulator with open-drain POK flag, 100mV dropout at 200mA, 55µA no-load supply current, and thermal/short-circuit protection - designed for power management in portable battery-powered systems such as wireless handsets and notebook computers.
For engineers reviewing the MAX8888EZK33 datasheet, MAX8888EZK33 pinout, MAX8888EZK33 application, or MAX8888EZK33 equivalent, key selection criteria include guaranteed 300mA output, 3.3V preset voltage, POK flag functionality, SOT23-5 package compatibility, and operation across -40°C to +85°C industrial temperature range.
Technical Context
The MAX8888EZK33 integrates a P-channel MOSFET pass transistor with RDS(ON) ≈ 0.5Ω, enabling 100mV dropout at 200mA and eliminating base-drive current losses typical of PNP-based LDOs. Its internal 1.25V reference and error amplifier regulate output via factory-trimmed feedback divider.
It features active-low open-drain POK output asserting low when VOUT falls below 92.5% of nominal (3.05V for 3.3V version), 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 3.3V ±3% over load (100µA–300mA) and temperature (-40°C to +85°C), enabling direct replacement of 3.3V logic rails without external resistors. |
| Dropout Voltage | 100mV at 200mA load, allowing stable regulation down to VIN = 3.4V - critical for extending runtime in single-cell Li-ion (3.0–4.2V) and Li-polymer systems. |
| Max Output Current | 300mA continuous (500mA pulsed), supporting moderate-power peripherals like RF transceivers or display drivers without thermal derating at TA ≤ +70°C. |
| Ground Pin Current | 55µA at no load and 65µA at 300mA, independent of load - ensures ultra-low quiescent consumption essential for standby battery life in handheld devices. |
| POK Threshold | 92.5% of nominal VOUT (≈3.05V), with 1% hysteresis, providing reliable power-on reset signaling to microcontrollers without external comparators. |
| PSRR @ 1kHz | 40dB (MAX8888 variant), rejecting low-frequency supply ripple from switching converters or noisy DC-DC stages feeding the LDO input. |
| Shutdown Current | 0.1µA max at VIN = 5.5V, enabling deep-sleep modes in battery-powered systems where µA-level leakage is critical. |
Pinout & Package
MAX8888EZK33 is housed in a thin 5-pin SOT23 package (1mm height), optimized for space-constrained portable PCB layouts. Pin assignments are validated per Maxim's official pin configuration diagram for MAX8888.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–5.5V input; requires ≥2.2µF ceramic bypass capacitor 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 and directly connected to system ground plane. |
| 3 - SHDN | Active-low enable control | Pulled low to disable regulator (IQ ≤ 0.1µA); pulled high to IN for normal operation; tolerates up to 6V regardless of VIN/VOUT. |
| 4 - POK | Open-drain power-good flag | Drives low when VOUT < 3.05V; requires external pullup (e.g., 100kΩ to OUT) for logic-level interface with µC reset inputs. |
| 5 - OUT | Regulated output | Delivers up to 300mA at 3.3V; requires ≥2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for loop stability and noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 3.3V output | Eliminates external resistor network, reducing BOM count and layout area while guaranteeing ±3% accuracy across full operating range. |
| 100mV dropout at 200mA | Enables operation with minimal headroom - extends usable battery voltage range by ~150mV compared to standard LDOs in Li-ion discharge profiles. |
| Open-drain POK output | Provides configurable power-monitoring interface compatible with 1.8V–5.5V logic families via simple pullup, simplifying POR circuit design. |
| Thermal shutdown with 20°C hysteresis | Prevents permanent damage during sustained overload; auto-recovery enables fault-tolerant operation without manual reset. |
| 0.1µA shutdown current | Supports multi-week shelf life in battery-backed applications (e.g., real-time clocks, sensors) without significant capacity loss. |
Applications
| Wireless Handsets | Notebook Computers |
|---|---|
Use Scenario: Powering baseband processor I/O rails and RF front-end bias circuits in GSM/UMTS handsets with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Primary 3.3V LDO delivering clean, regulated power to noise-sensitive analog and digital subsystems. Use Value: 100mV dropout preserves regulation until battery voltage drops to 3.4V, maximizing talk time; POK signals µC when VBAT nears end-of-life. |
Use Scenario: Supplying USB controller, card reader, or touchpad logic in ultraportable notebooks with tight thermal constraints. IC Role / Device Role / Timing Role: Secondary LDO generating stable 3.3V from main 5V or 3.3V system rail, with POK used for peripheral initialization sequencing. Use Value: 55µA quiescent current minimizes standby drain; thermal shutdown prevents overheating during sustained peripheral activity. |
| PDAs and Palmtop Computers | Digital Cameras |
Use Scenario: Regulating power for LCD interface, memory card slot, and audio codec in handheld PDAs with limited PCB area. IC Role / Device Role / Timing Role: Compact, low-profile 3.3V supply with integrated POK for coordinated system boot and sleep/wake transitions. Use Value: SOT23-5 footprint saves >40% board space vs. SO-8 alternatives; 0.1µA shutdown current enables months of calendar-clock operation on coin cell backup. |
Use Scenario: Powering image sensor interface and flash memory controller during burst capture mode in compact digital cameras. IC Role / Device Role / Timing Role: High-current-capable LDO handling 300mA pulsed loads during sensor readout and write cycles. Use Value: 500mA pulsed current rating supports short-duration peak loads without dropout; foldback current limiting protects against sensor short-circuit faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76333DBVR | 300mA, 3.3V, 120mV dropout at 200mA; no POK output; 85µA IQ; SOT23-5 package. | Lacks power-good monitoring; requires external reset IC for POR functionality. | Select when POK is unnecessary and higher dropout is acceptable for cost-sensitive designs. |
| MCP1700T-3302E/MB | 250mA, 3.3V, 178mV dropout at 250mA; no POK; 1.6µA IQ; SOT23-3 package (no SHDN pin). | Lower current rating and no enable/shutdown control; smaller 3-pin footprint but less flexible sequencing. | Choose for ultra-low-IQ applications where 250mA suffices and shutdown control is omitted. |
Compared with TPS76333DBVR and MCP1700T-3302E/MB, the MAX8888EZK33 uniquely combines 300mA capability, 100mV dropout, integrated POK, and 0.1µA shutdown in a standard SOT23-5 - making it optimal for space- and feature-constrained portable systems requiring autonomous power monitoring.
Availability
MAX8888EZK33 is available at Aetrix Electronics and suitable for wireless handsets, notebook computers, and PDAs requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX8888EZK33 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 MAX8887/MAX8888 product line was engineered specifically for ultra-low-quiescent-current, low-noise, and compact-footprint power regulation in portable battery-powered equipment - emphasizing dropout performance, thermal robustness, and integration of supervisory functions like POK.
FAQ
What is the output voltage tolerance of the MAX8888EZK33 over temperature and load?
The MAX8888EZK33 guarantees ±3% output voltage accuracy across the full operating temperature range (-40°C to +85°C) and load current range (100µA to 300mA). This specification is verified in production testing and applies to all units shipped as MAX8888EZK33, ensuring consistent 3.3V rail performance in portable systems without calibration.
Does the MAX8888EZK33 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 MAX8888EZK33. The MAX8888EZK33 uses a different internal architecture that omits the BP pin; its pinout is IN-GND-SHDN-POK-OUT in SOT23-5, with no BP terminal.
What is the minimum input voltage required for the MAX8888EZK33 to maintain regulation at 300mA load?
At 300mA load, the MAX8888EZK33 requires a minimum input voltage of approximately 3.45V to maintain regulation, based on its maximum dropout voltage of 150mV (per datasheet electrical characteristics table). This ensures stable 3.3V output even under worst-case conditions including temperature and process variation.
Can the POK output of the MAX8888EZK33 drive a microcontroller reset pin directly?
Yes - the POK output of the MAX8888EZK33 is an open-drain N-channel device capable of sinking ≥1mA at 0.1V. When paired with a pullup resistor (e.g., 100kΩ to OUT), it delivers a clean logic-low signal below 0.1V and high-impedance state above 3.05V, fully compatible with standard µC reset inputs requiring active-low assertion.
Is the MAX8888EZK33 RoHS-compliant and lead-free?
Yes - the "+T" suffix in the ordering code MAX8888EZK33+T explicitly denotes lead-free (RoHS-compliant) packaging per Maxim Integrated's ordering information table. All units supplied as MAX8888EZK33+T meet JEDEC J-STD-020 moisture sensitivity level 1 and IPC/JEDEC J-STD-033 handling requirements.
MAX8888EZK33 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 FAQ
1.How can I place an order for MAX8888EZK33 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8888EZK33 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 reliable?
The price and inventory of MAX8888EZK33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8888EZK33 is usually 5 days.
3.What payment methods are accepted for MAX8888EZK33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8888EZK33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8888EZK33?
MAX8888EZK33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8888EZK33 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?
For technical support, including MAX8888EZK33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8888EZK33 requirements.
6.How does Aetrix verify that MAX8888EZK33 is sourced from the original manufacturer or authorized distributors?
All MAX8888EZK33 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 meets industry standards.
7.What is the process for return or replacement of MAX8888EZK33?
All MAX8888EZK33 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8888EZK33, 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 part is unused and in its original packaging.
Return procedure for MAX8888EZK33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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