My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8888EZK29+T
- Part No.:
- MAX8888EZK29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8888EZK29+T.pdf
- Description:
- IC REG LIN 2.9V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,515
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX8888EZK29+T from Maxim Integrated is a 2.85V 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 - designed for battery-powered portable electronics requiring precise voltage regulation and system power monitoring.
For engineers reviewing the MAX8888EZK29+T datasheet, MAX8888EZK29+T pinout, MAX8888EZK29+T application, or MAX8888EZK29+T equivalent, this page delivers verified specifications, SOT23-5 pin mapping, real-world use cases in wireless handsets and digital cameras, and two validated alternative regulators with documented functional and interface differences.
Technical Context
The MAX8888EZK29+T integrates a p-channel MOSFET pass transistor (RDS(ON) ≈ 0.5Ω), error amplifier, 1.25V reference, and internal feedback divider to deliver stable 2.85V output. Its POK output asserts low when VOUT falls below 92.5% of nominal (i.e., <2.64V), with 1% typical hysteresis and 0.1V VOL at 1mA sink.
It operates from 2.5V–5.5V input, maintains 55µA ground current independent of load, and features foldback current limiting (420mA min at VOUT >93% nominal; 300mA continuous), thermal shutdown at +170°C with 20°C hysteresis, and 40dB PSRR at 1kHz with COUT = 2.2µF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85V ±3% over -40°C to +85°C; enables direct replacement of 2.85V logic rails without external resistors. |
| Max Continuous Output Current | 300mA guaranteed; supports baseband processors and camera sensor modules without derating at +70°C ambient. |
| Dropout Voltage | 100mV at 200mA load; allows operation down to 2.95V input with full regulation - critical for Li-ion battery discharge tail-end. |
| Quiescent Current | 55µA at no load; remains constant across load range, enabling ultra-low-power sleep modes in handheld devices. |
| POK Threshold Accuracy | 92.5% of nominal (2.64V) with ±2.5% tolerance; provides reliable power-on reset signaling to microcontrollers before system initialization. |
| PSRR @ 1kHz | 40dB with 2.2µF ceramic output capacitor; suppresses switching noise from adjacent DC-DC converters in mixed-power-supply PCBs. |
| Shutdown Current | 0.1µA max at VIN = 5.5V; reduces standby drain to negligible levels in always-on battery-backed systems. |
Pinout & Package
MAX8888EZK29+T is housed in a RoHS-compliant, thin-profile 5-pin SOT23 package (1mm height, Z5-1 footprint), optimized for space-constrained portable designs.
| 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 plane for noise control. |
| 3 - SHDN | Active-low enable control | Pulled low to reduce supply current to ≤0.1µA; driven high (≥1.6V) for normal operation; tolerates up to 6V. |
| 4 - POK | Open-drain power-OK flag | Asserts low when VOUT < 2.64V; requires external 100kΩ pullup to OUT for logic-level output; sinks ≥1mA. |
| 5 - OUT | Regulated output | Delivers 2.85V at up to 300mA; bypassed with 2.2µF ceramic cap (ESR < 0.1Ω) to GND for stability and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Open-drain POK output | Provides system-level power monitoring and POR signaling without additional logic; compatible with 1.8V/3.3V I/O domains via pullup. |
| p-Channel MOSFET pass element | Eliminates base-drive current loss; ensures 55µA quiescent current remains load- and dropout-independent. |
| Foldback current limiting | Reduces short-circuit current to 420mA (min) when VOUT drops below 93%, improving fault safety and thermal margin. |
| Thermal shutdown with hysteresis | Disables output at +170°C junction temperature and re-enables only after cooling by 20°C - prevents thermal oscillation during overload. |
| Low-noise compatible design | Supports BP pin (not used on MAX8888) for optional noise filtering; MAX8888 achieves 360µVRMS output noise with standard 2.2µF COUT. |
Applications
| Wireless Handsets | Digital Cameras |
|---|---|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O banks in GSM/UMTS smartphones. IC Role / Device Role / Timing Role: Primary LDO delivering clean, regulated 2.85V to sensitive analog circuitry while monitoring rail integrity via POK. Use Value: Enables reliable RF performance during battery voltage sag (down to 2.95V input) and triggers MCU reset if VOUT drops below 2.64V. |
Use Scenario: Supplying image sensor analog core and ISP interface logic in compact digital still/video cameras. IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO with POK flag ensuring sensor power validity before frame capture initiation. Use Value: Maintains 2.85V accuracy within ±3% across temperature, preventing sensor gain drift; POK synchronizes power-up sequence with FPGA boot. |
| Notebook Computers | Hand-Held Instruments |
Use Scenario: Regulating auxiliary voltage for USB controller PHY or embedded security module in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary LDO providing isolated, monitored 2.85V rail with minimal board area and thermal impact. Use Value: 1mm-high SOT23 package fits tight BGA escape routing zones; 55µA quiescent current extends suspend-mode battery life. |
Use Scenario: Powering precision ADC front-end and microcontroller peripherals in battery-operated multimeters and data loggers. IC Role / Device Role / Timing Role: Stable, low-drift voltage source with POK confirmation for calibration-critical subsystems. Use Value: ±3% output accuracy and thermal shutdown ensure measurement integrity under varying ambient conditions and load transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76328DBVR | 2.8V output (vs. 2.85V); 150mV dropout at 150mA; no POK output; 85µA IQ; SOT23-5 package. | Lacks power-good signaling; requires external reset IC for POR; tighter dropout spec not needed for 2.85V target. | Select when POK is unnecessary and lower cost is prioritized over exact voltage match and ultra-low IQ. |
| MCP1702T-2852E/MB | 2.85V output; 600mV dropout at 250mA; 2.5µA IQ; no POK; SOT23-5; thermal shutdown only (no foldback). | Higher dropout limits usable battery range; ultra-low IQ benefits long-term standby but sacrifices transient response and fault robustness. | Select for energy-harvesting or coin-cell applications where 0.1µA shutdown is irrelevant and dropout tolerance is relaxed. |
Compared with TPS76328DBVR and MCP1702T-2852E/MB, the MAX8888EZK29+T uniquely combines precise 2.85V output, 100mV dropout, integrated POK, and 0.1µA shutdown - making it optimal for space- and power-constrained portable systems requiring both rail integrity monitoring and extended battery runtime.
Availability
MAX8888EZK29+T is available at Aetrix Electronics and suitable for wireless handsets, digital cameras, notebook computers, and hand-held instruments requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.
Supply support for MAX8888EZK29+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 MAX8887/MAX8888 family was engineered specifically for portable battery-powered equipment - delivering ultra-low quiescent current, low dropout, and integrated power monitoring in minimal SOT23-5 footprint.
FAQ
What is the exact output voltage of the MAX8888EZK29+T?
The MAX8888EZK29+T delivers a factory-trimmed fixed output voltage of 2.85V with ±3% accuracy over the full operating temperature range (-40°C to +85°C) and load current (100µA to 300mA). This value is confirmed in the Electrical Characteristics table and ordering information section of the official datasheet, where "29" in the suffix explicitly denotes 2.85V output.
Does the MAX8888EZK29+T include a power-OK (POK) output, and how does it function?
Yes, the MAX8888EZK29+T includes an active-low, open-drain POK output (Pin 4). It pulls low when the regulated output falls below 92.5% of nominal (i.e., <2.64V), with ±2.5% tolerance and 1% typical hysteresis. During shutdown, POK is actively driven low. To interface with logic inputs, a 100kΩ pullup resistor to OUT is required - a key differentiator from the MAX8887 variant, which lacks this feature.
What is the dropout voltage specification for the MAX8888EZK29+T at 200mA load?
The MAX8888EZK29+T guarantees a maximum dropout voltage of 100mV at 200mA load, as stated in the General Description and Electrical Characteristics tables. This means it maintains regulation with only 2.95V input when delivering 2.85V output - a critical parameter for extending usable battery life in single-cell Li-ion systems.
What package type and footprint does the MAX8888EZK29+T use?
The MAX8888EZK29+T uses a thin 5-pin SOT23 package (package code Z5-1, document no. 21-0113), measuring only 1mm in height. Its pinout matches the standard SOT23-5 land pattern with IN, GND, SHDN, POK, and OUT arranged in top-view order. The "+T" suffix confirms RoHS-compliance and tape-and-reel packaging for automated assembly.
How does the MAX8888EZK29+T handle overcurrent and thermal faults?
The MAX8888EZK29+T employs foldback current limiting: it delivers up to 300mA continuously, but reduces current to 420mA (min) when VOUT drops below 93% of nominal. Thermal shutdown activates at +170°C junction temperature and remains latched until the die cools by 20°C - preventing latch-up and enabling safe recovery during sustained overload, unlike simple shutdown-only regulators.
MAX8888EZK29+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):
- 2.9V
- 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
MAX8888EZK29+T FAQ
1.How can I place an order for MAX8888EZK29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8888EZK29+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 MAX8888EZK29+T reliable?
The price and inventory of MAX8888EZK29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8888EZK29+T is usually 5 days.
3.What payment methods are accepted for MAX8888EZK29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8888EZK29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8888EZK29+T?
MAX8888EZK29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8888EZK29+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 MAX8888EZK29+T?
For technical support, including MAX8888EZK29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8888EZK29+T requirements.
6.How does Aetrix verify that MAX8888EZK29+T is sourced from the original manufacturer or authorized distributors?
All MAX8888EZK29+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 MAX8888EZK29+T meets industry standards.
7.What is the process for return or replacement of MAX8888EZK29+T?
All MAX8888EZK29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8888EZK29+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 MAX8888EZK29+T part is unused and in its original packaging.
Return procedure for MAX8888EZK29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8888EZK29+T Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
