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Analog Devices Inc./Maxim Integrated MAX8888EZK24+T
- Part No.:
- MAX8888EZK24+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8888EZK24+T.pdf
- Description:
- IC REG LIN 2.4V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,471
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Product details
Overview
MAX8888EZK24+T from Maxim Integrated is a 2.4V fixed-output, 300mA low-dropout linear regulator with open-drain power-OK (POK) output, 100mV dropout at 200mA, 55µA no-load supply current, and thermal/short-circuit protection. It operates from 2.5V to 5.5V input and targets voltage regulation in space-constrained portable electronics such as wireless handsets and digital cameras.
For engineers reviewing the MAX8888EZK24+T datasheet, MAX8888EZK24+T pinout, MAX8888EZK24+T application, or MAX8888EZK24+T equivalent, key selection criteria include guaranteed 300mA output under dropout conditions, POK flag timing behavior, SOT23-5 package thermal performance, and compatibility with 2.2µF ceramic input/output capacitors for stability.
Technical Context
The MAX8888EZK24+T integrates a 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 2.4V output.
It features active-low open-drain POK that asserts when VOUT falls below 92.5% of nominal (2.22V), with 1% hysteresis and valid operation down to 1.0V input. Shutdown reduces supply current to 0.1µA and forces POK/OUT low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.4V ±3% over temperature and load - ensures stable core logic or analog supply without external resistors. |
| Max Continuous Output Current | 300mA - supports moderate-power RF modules or sensor interfaces without derating at +85°C. |
| Dropout Voltage | 100mV at 200mA - enables operation down to 2.5V input with full regulation, extending 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 wake-up circuits. |
| POK Threshold Accuracy | 92.5% of VOUT (2.22V) with ±2.5% tolerance - provides reliable power-fail detection for microcontroller reset sequencing. |
| PSRR @ 1kHz | 40dB - suppresses switching noise from adjacent DC-DC converters feeding shared input rails. |
| Shutdown Current | 0.1µA - meets ultra-low-power requirements for battery-backed memory or sleep-mode peripherals. |
Pinout & Package
MAX8888EZK24+T uses a 5-pin SOT23 package (1mm height, Z5-1 outline), optimized for high-density PCB layouts in handheld devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN | Input 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. |
| 3: SHDN | Active-Low Enable | Pulled low to enter 0.1µA shutdown; driven high (≥1.6V) for normal operation; tolerates up to 6V. |
| 4: POK | Open-Drain Power-OK Flag | Asserts low when VOUT < 2.22V; requires external pullup (e.g., 100kΩ to OUT) for logic-level signaling. |
| 5: OUT | Regulated Output | Delivers up to 300mA at 2.4V; bypassed with 2.2µF ceramic capacitor (ESR < 0.1Ω) to GND. |
Key Features
| Feature | Design Value |
|---|---|
| p-Channel MOSFET Pass Transistor | Eliminates base-drive current loss, maintaining 55µA quiescent current even at 300mA load and in dropout. |
| Foldback Current Limiting | Reduces current limit from 500mA to 420mA when VOUT drops below 93%, protecting during sustained overload or short-circuit. |
| Thermal Shutdown with Hysteresis | Disables output at +170°C junction temperature and re-enables only after cooling by 20°C, preventing latch-up during thermal stress. |
| Low-ESR Capacitor Compatibility | Stable with 2.2µF ceramic output capacitors (ESR < 0.1Ω), enabling compact, high-reliability designs without tantalum or electrolytic parts. |
| Input Undervoltage Lockout | Disables regulator below ~2.25V input (2.4V typical threshold), preventing erratic behavior during brownout or weak battery conditions. |
Applications
| Wireless Handsets | Digital Cameras |
|---|---|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O supplies in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary LDO delivering clean, regulated 2.4V to sensitive RF front-end components. Use Value: 100mV dropout extends usable battery range; POK synchronizes RF power-up sequencing with baseband controller. | Use Scenario: Supplying image sensor interface and auto-focus motor driver circuits in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: Fixed-output LDO providing stable 2.4V for CMOS image sensor analog front-end and lens actuator logic. Use Value: 40dB PSRR at 1kHz rejects noise from flash LED drivers; thermal shutdown prevents overheating during burst capture mode. |
| Notebook Computers | Hand-Held Instruments |
Use Scenario: Regulating auxiliary 2.4V rail for USB controller PHY or embedded security module in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary LDO supporting isolated subsystems requiring independent voltage control and fault monitoring. Use Value: POK signal triggers firmware-initiated graceful shutdown before main system rail collapse; SOT23-5 footprint saves board area in tight BGA routing zones. | Use Scenario: Powering precision ADC reference buffers and low-noise op-amp stages in battery-operated multimeters and data loggers. IC Role / Device Role / Timing Role: Low-quiescent LDO supplying critical analog signal chain components with minimal self-heating. Use Value: 55µA no-load current maximizes battery runtime in sleep mode; ±3% output accuracy maintains measurement integrity across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78224DRVT | 2.4V fixed, 150mA output, 250mV dropout at 150mA, 1.5µA IQ, no POK output | Lacks power-OK flag and lower current capability; suited for ultra-low-IQ sensor nodes, not POK-dependent systems | Select only if POK is unnecessary and load current ≤150mA; verify thermal margin at higher ambient temperatures. |
| MCP1702T-2402E/MB | 2.4V fixed, 250mA output, 600mV dropout at 250mA, 4µA IQ, no POK | Higher dropout limits usable input range; no POK complicates power sequencing in multi-rail systems | Consider only for cost-sensitive, non-sequenced applications where input ≥3.0V is guaranteed and load ≤250mA. |
Compared with TPS78224DRVT and MCP1702T-2402E/MB, the MAX8888EZK24+T uniquely combines 300mA drive, 100mV dropout, and integrated POK in a 5-pin SOT23-enabling robust, space-efficient power management in battery-powered systems requiring precise reset coordination.
Availability
MAX8888EZK24+T is available at Aetrix Electronics and suitable for wireless handsets, digital cameras, and notebook computers requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for MAX8888EZK24+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 MAX8887/MAX8888 product line delivers low-noise, low-quiescent-current LDOs optimized for battery-powered equipment where small size, high efficiency, and reliable power sequencing are critical.
FAQ
What is the exact output voltage tolerance of the MAX8888EZK24+T over temperature and load?
The MAX8888EZK24+T guarantees ±3% output voltage accuracy across the full operating temperature range (–40°C to +85°C) and load current range (100µA to 300mA). At +25°C and 100mA load, typical deviation is ±1.2%. This tolerance ensures reliable operation of 2.4V-tolerant logic and analog circuits without external trimming.
Does the MAX8888EZK24+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 MAX8888EZK24+T. The MAX8888EZK24+T pinout replaces BP with POK; therefore, no BP capacitor is used or required. Only IN, OUT, and optional POK pullup capacitors apply.
What is the minimum input voltage required for the MAX8888EZK24+T to maintain regulation at 300mA load?
At 300mA load, the MAX8888EZK24+T requires a minimum input voltage of 2.55V to maintain regulation - calculated from its maximum dropout voltage of 150mV (per datasheet, VDROP = 150mV at VOUT = 3.3V and 300mA; for 2.4V output, worst-case dropout remains ≤150mV). This allows operation down to near-end-of-life single-cell Li-ion voltages.
How does the POK output behave during shutdown of the MAX8888EZK24+T?
During shutdown (SHDN = GND), the MAX8888EZK24+T actively drives the POK pin low, regardless of output voltage level. This behavior ensures deterministic reset signaling to downstream logic - unlike passive pull-down schemes - and eliminates ambiguity during power-down sequences in systems relying on POK for state management.
Can the MAX8888EZK24+T be used with ceramic output capacitors having ESR above 0.1Ω?
No - the MAX8888EZK24+T requires an output capacitor with ESR ≤0.1Ω (e.g., standard X5R/X7R ceramic) to ensure loop stability and optimal transient response. Higher-ESR capacitors (e.g., tantalum or older ceramic types) may cause oscillation or excessive overshoot during load steps, as confirmed by stability analysis in the datasheet's capacitor selection guidelines.
MAX8888EZK24+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):
- 2.4V
- 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
MAX8888EZK24+T FAQ
1.How can I place an order for MAX8888EZK24+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8888EZK24+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 MAX8888EZK24+T reliable?
The price and inventory of MAX8888EZK24+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8888EZK24+T is usually 5 days.
3.What payment methods are accepted for MAX8888EZK24+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8888EZK24+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8888EZK24+T?
MAX8888EZK24+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8888EZK24+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 MAX8888EZK24+T?
For technical support, including MAX8888EZK24+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8888EZK24+T requirements.
6.How does Aetrix verify that MAX8888EZK24+T is sourced from the original manufacturer or authorized distributors?
All MAX8888EZK24+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 MAX8888EZK24+T meets industry standards.
7.What is the process for return or replacement of MAX8888EZK24+T?
All MAX8888EZK24+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8888EZK24+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 MAX8888EZK24+T part is unused and in its original packaging.
Return procedure for MAX8888EZK24+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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