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Analog Devices Inc./Maxim Integrated MAX8888EZK23+T
- Part No.:
- MAX8888EZK23+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8888EZK23+T.pdf
- Description:
- IC REG LIN 2.3V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,971
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Product details
Overview
MAX8888EZK23+T from Maxim Integrated is a low-dropout linear regulator with 2.3V fixed output voltage, 300mA continuous output current, 100mV dropout at 200mA load, and integrated open-drain power-OK (POK) flag - designed for battery-powered portable systems including wireless handsets and PDAs where precise voltage regulation and supply monitoring are critical.
For engineers reviewing the MAX8888EZK23+T datasheet, MAX8888EZK23+T pinout, MAX8888EZK23+T application, or MAX8888EZK23+T equivalent, key selection criteria include guaranteed 2.3V ±3% output accuracy over temperature and load, 55µA no-load quiescent current, thermal/short-circuit protection, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX8888EZK23+T employs a p-channel MOSFET pass transistor with 0.5Ω RDS(ON), enabling ultra-low dropout and eliminating base-drive current loss typical of PNP-based regulators. Its internal 1.25V reference and error amplifier drive the pass device to maintain regulation across input voltages from 2.5V to 5.5V.
It integrates a dedicated open-drain POK output that asserts low when VOUT falls below 92.5% of nominal (2.13V), with 1% hysteresis and valid operation down to 1.0V input. Shutdown is controlled by an active-low SHDN pin with 0.1µA shutdown current and 100nA bias current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.3V ±3% over -40°C to +85°C and 100µA–300mA load - ensures stable core logic or RF bias rail in portable devices. |
| Dropout Voltage | 100mV at 200mA - enables operation down to 2.4V input, extending usable battery life in single-cell Li-ion or Li-poly systems. |
| Quiescent Current | 55µA at no load - minimizes standby power loss in always-on subsystems like real-time clocks or wake-up circuitry. |
| POK Threshold | 92.5% of nominal (2.13V) with 1% hysteresis - provides clean, glitch-free power-on reset signaling to microcontrollers. |
| Thermal Protection | 170°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| PSRR | 40dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding shared input rails. |
| Shutdown Current | 0.1µA max at VIN = 5.5V - supports multi-week shelf life in battery-backed applications. |
Pinout & Package
MAX8888EZK23+T is housed in a thin 5-pin SOT23 package (1mm height, Z5-1 footprint), optimized for high-density portable PCBs. Pin assignments are validated per Maxim's functional diagram and pin description table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–5.5V input; requires 2.2µF ceramic bypass to GND for stability and transient response. |
| 2 - GND | Power ground reference | Low-impedance return path for regulator current and POK pullup; must be connected directly to system ground plane. |
| 3 - SHDN | Active-low enable control | 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 | Drives low when VOUT < 2.13V; requires external 100kΩ pullup to OUT for logic-level output; asserted during shutdown. |
| 5 - OUT | Regulated output terminal | Delivers up to 300mA at 2.3V; bypassed with 2.2µF ceramic capacitor (ESR < 0.1Ω) to ensure stability and low noise. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.3V output | Factory-trimmed precision voltage eliminates external feedback resistors and reduces BOM count in compact designs. |
| Integrated POK flag | Enables reliable power-on reset sequencing without external comparators or discrete logic, reducing system component count. |
| Foldback current limiting | Reduces output current to 500mA (pulsed) or lower under undervoltage conditions, protecting downstream loads during brownouts. |
| Thermal shutdown with hysteresis | Prevents thermal runaway by cycling on/off at 170°C/150°C, allowing safe recovery without manual intervention. |
| Ultra-low quiescent current | 55µA independent of load enables >1-year battery life in low-duty-cycle IoT sensors powered by coin cells. |
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 stable 2.3V to sensitive analog front-end circuitry requiring low noise and fast transient response. Use Value: 100mV dropout extends talk time by enabling regulation until battery voltage drops to 2.4V, while POK ensures clean MCU reset during power-up. |
Use Scenario: Supplying image sensor interface and memory controller voltage in compact digital still/video cameras. IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO providing regulated 2.3V for CMOS sensor analog blocks and SDIO interface logic. Use Value: 55µA no-load current minimizes standby drain during sleep mode; 40dB PSRR at 1kHz suppresses noise from flash LED drivers. |
| PDAs and Palmtop Computers | Hand-Held Instruments |
|
Use Scenario: Regulating voltage for touch-screen controller, audio codec, and low-power MCU cores in handheld computing devices. IC Role / Device Role / Timing Role: System-level LDO managing multiple low-voltage domains with precise tracking and fault reporting via POK. Use Value: ±3% output accuracy ensures consistent ADC reference and display driver performance across temperature; SHDN enables software-controlled power gating. |
Use Scenario: Providing stable 2.3V supply to precision op-amps, ADC references, and microcontroller peripherals in portable test equipment. IC Role / Device Role / Timing Role: Precision LDO acting as a clean auxiliary rail for signal conditioning and data acquisition subsystems. Use Value: Thermal shutdown and short-circuit protection prevent field failures during probe misconnection or ESD events; SOT23-5 fits tight instrument enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78223DRVR | 2.3V fixed output, 150mA rated, 250mV dropout at 150mA, 1.8µA IQ - lower current, higher dropout, much higher quiescent current. | Limited to ultra-low-power sensor nodes; insufficient for 300mA pulsed loads like camera flash or RF bursts. | Select only if system peak current ≤150mA and board layout allows larger dropout margin. |
| MCP1702T-2302E/MB | 2.3V fixed output, 250mA rated, 600mV dropout at 250mA, 2.5µA IQ - higher dropout, lower current rating, different thermal profile. | Suitable for industrial sensors but not portable RF or imaging loads due to excessive dropout and current limitation. | Choose only for cost-sensitive, non-battery-critical applications where 600mV dropout is acceptable. |
Compared with TPS78223DRVR and MCP1702T-2302E/MB, the MAX8888EZK23+T uniquely delivers 300mA output with 100mV dropout and 55µA quiescent current in the same SOT23-5 footprint - making it the only option meeting simultaneous requirements for high current, ultra-low dropout, and micropower operation in portable designs.
Availability
MAX8888EZK23+T is available at Aetrix Electronics and suitable for wireless handsets, digital cameras, PDAs, hand-held instruments, and PCMCIA cards requiring stable component supply with full RoHS compliance and lead-free packaging.
Supply support for MAX8888EZK23+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 MAX8888EZK23+T belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-powered portable electronics demanding high efficiency, small size, and robust protection features.
FAQ
What is the output voltage tolerance of the MAX8888EZK23+T over temperature and load?
The MAX8888EZK23+T guarantees ±3% output voltage accuracy across the full operating range of -40°C to +85°C and for load currents from 100µA to 300mA. This specification is confirmed in the Electrical Characteristics table under "Output Voltage Accuracy" and applies directly to the MAX8888EZK23+T with its factory-set 2.3V output.
Does the MAX8888EZK23+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 MAX8888EZK23+T. The MAX8888EZK23+T uses pin 4 for the POK output instead. Therefore, no BP capacitor is needed or supported for the MAX8888EZK23+T.
What is the minimum input voltage required for regulation with the MAX8888EZK23+T at 200mA load?
At 200mA load, the MAX8888EZK23+T has a typical dropout voltage of 100mV. Since its nominal output is 2.3V, the minimum input voltage to maintain regulation is 2.3V + 0.1V = 2.4V. This value is verified in the Typical Operating Characteristics curve "DROPOUT VOLTAGE vs. LOAD CURRENT" and the Electrical Characteristics table.
Can the POK output of the MAX8888EZK23+T be used without an external pullup resistor?
No - the POK output is an open-drain n-channel device and requires an external pullup resistor to function as a logic-level signal. Maxim recommends a 100kΩ resistor from POK to OUT. Without this pullup, POK remains floating when high-impedance and cannot reliably drive microcontroller reset inputs or other digital logic.
Is the MAX8888EZK23+T RoHS-compliant and lead-free?
Yes - the "+T" suffix in MAX8888EZK23+T explicitly denotes a lead(Pb)-free, RoHS-compliant package per Maxim's Ordering Information table. It uses the standard 5-pin SOT23 (Z5-1) package with environmentally compliant finish and marking.
MAX8888EZK23+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):
- 2.3V
- 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
MAX8888EZK23+T FAQ
1.How can I place an order for MAX8888EZK23+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8888EZK23+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 MAX8888EZK23+T reliable?
The price and inventory of MAX8888EZK23+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8888EZK23+T is usually 5 days.
3.What payment methods are accepted for MAX8888EZK23+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8888EZK23+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8888EZK23+T?
MAX8888EZK23+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8888EZK23+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 MAX8888EZK23+T?
For technical support, including MAX8888EZK23+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8888EZK23+T requirements.
6.How does Aetrix verify that MAX8888EZK23+T is sourced from the original manufacturer or authorized distributors?
All MAX8888EZK23+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 MAX8888EZK23+T meets industry standards.
7.What is the process for return or replacement of MAX8888EZK23+T?
All MAX8888EZK23+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8888EZK23+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 MAX8888EZK23+T part is unused and in its original packaging.
Return procedure for MAX8888EZK23+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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