My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8888EZK32+T
- Part No.:
- MAX8888EZK32+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8888EZK32+T.pdf
- Description:
- IC REG LIN 3.2V 300MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,565
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX8888EZK32+T from Maxim Integrated is a 3.2V 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 is designed for battery-powered portable electronics requiring precise voltage regulation and system power monitoring.
For engineers reviewing the MAX8888EZK32+T datasheet, MAX8888EZK32+T pinout, MAX8888EZK32+T application, or MAX8888EZK32+T equivalent, key selection criteria include guaranteed 300mA continuous output, POK flag timing behavior, dropout performance near end-of-battery-life, and SOT23-5 footprint compatibility in space-constrained handheld designs.
Technical Context
The MAX8888EZK32+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 against the regulated 3.2V output via factory-trimmed resistive divider.
POK functionality uses a comparator with 92.5% nominal VOUT trip threshold (±2.5%) and 1% hysteresis, driving an open-drain n-channel output that sinks ≥1mA when asserted. Shutdown logic disables the pass transistor and forces both OUT and POK low while reducing supply current to ≤2µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.2V ±3% over load (100µA–300mA) and temperature (−40°C to +85°C), enabling direct replacement of 3.3V LDOs where tighter tolerance is required. |
| Dropout Voltage | 100mV at 200mA load, allowing stable 3.2V output down to 3.3V input - critical for Li-ion battery operation below 3.4V. |
| Supply Current | 55µA at no load, independent of output current, minimizing standby power loss in always-on subsystems. |
| POK Threshold | Asserts low when VOUT falls below 92.5% of 3.2V (i.e., ≤2.96V), providing reliable power-fail detection for microcontroller reset sequencing. |
| Thermal Protection | Shuts down at 170°C junction temperature with 20°C hysteresis, preventing permanent damage during sustained overload or poor PCB thermal design. |
| Shutdown Current | ≤2µA at VIN = 5.5V, supporting ultra-low-power sleep modes in portable devices. |
| PSRR | 40dB at 1kHz (COUT = 2.2µF), suppressing ripple from noisy DC-DC converters upstream of the LDO. |
Pinout & Package
MAX8888EZK32+T is housed in a RoHS-compliant, thin-profile 5-pin SOT23 package (1mm height, Z5-1 outline), optimized for high-density portable PCB layouts.
| 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 | Low-impedance return path for all internal circuits; must be connected directly to system ground plane. |
| 3: SHDN | Active-low enable control | Pulled low to disable regulator; draws ≤100nA bias current; tolerates up to 6V regardless of VIN/VOUT. |
| 4: POK | Open-drain power-OK flag | Drives low when VOUT < 92.5% of 3.2V; requires external pullup (e.g., 100kΩ to OUT) for logic-level interface. |
| 5: OUT | Regulated 3.2V output | Sources up to 300mA; requires 2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for stability and noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| p-Channel MOSFET pass element | Eliminates base-drive current, maintaining 55µA quiescent current across full 0–300mA load range - unlike PNP-based LDOs. |
| Foldback current limiting | Reduces current limit from 500mA (pulsed) to 420mA when VOUT drops below 93%, protecting downstream circuitry during brownout. |
| Factory-trimmed 3.2V output | Guaranteed ±3% accuracy over temperature and load eliminates need for external feedback resistors or trimming. |
| Integrated thermal shutdown | Self-recovering protection at 170°C junction temperature prevents latch-up during sustained overload without external components. |
| Open-drain POK with hysteresis | Provides clean, glitch-free power-fail signaling to µC reset inputs; 1% hysteresis prevents chatter near trip point. |
Applications
| Smartphone Baseband Power | Digital Camera Sensor Bias |
|---|---|
|
Use Scenario: Supplying 3.2V to cellular baseband processors during active call mode with dynamic current draw from 10mA to 300mA. IC Role / Device Role / Timing Role: Primary voltage regulator delivering stable core voltage while monitoring rail integrity via POK signal to application processor. Use Value: 100mV dropout extends usable battery life by >15 minutes compared to 200mV-dropout alternatives at end-of-discharge. |
Use Scenario: Powering CMOS image sensor analog front-end requiring low-noise, tightly regulated 3.2V under burst capture loads. IC Role / Device Role / Timing Role: Low-PSRR LDO filtering switching converter ripple; POK synchronizes sensor initialization with valid rail establishment. Use Value: 40dB PSRR at 1kHz suppresses DC-DC switching noise, reducing image sensor fixed-pattern noise by measurable dB. |
| Wireless Headset Audio Codec | Industrial Handheld Scanner |
|
Use Scenario: Providing clean 3.2V bias to audio DAC/ADC in Bluetooth headsets operating from single-cell Li-ion (3.0V–4.2V). IC Role / Device Role / Timing Role: Low-quiescent-current regulator maintaining headset standby time; POK enables fast wake-from-sleep sequencing. Use Value: 55µA no-load current extends standby battery life to >120 hours, exceeding typical 96-hour requirement. |
Use Scenario: Regulating 3.2V for barcode laser driver and MCU in ruggedized handheld scanners exposed to −25°C to +70°C ambient. IC Role / Device Role / Timing Role: Industrial-grade LDO with guaranteed −40°C to +85°C operation; thermal shutdown prevents field failure during extended scanning. Use Value: 170°C thermal cutoff with 20°C hysteresis ensures reliable recovery after temporary overheating in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P322MR | 3.2V fixed, 300mA, 150mV dropout at 200mA, no POK output, 1µA shutdown current | Lacks power-OK monitoring; suitable only where system-level reset generation is handled externally | Select when POK is unnecessary and lowest possible shutdown current is prioritized over rail monitoring. |
| Analog Devices ADP160ACBZ-3.2-R7 | 3.2V fixed, 150mA max, 195mV dropout at 150mA, no POK, 570nA shutdown current | Lower current rating and higher dropout limit use cases to battery-powered sensors, not baseband processors | Choose only for sub-150mA loads where ultra-low shutdown current outweighs output current capability. |
Compared with XC6206P322MR and ADP160ACBZ-3.2-R7, the MAX8888EZK32+T uniquely delivers 300mA output with integrated POK flag and 100mV dropout - making it the sole option among the three for space-constrained, battery-powered systems requiring both high current and power-rail supervision.
Availability
MAX8888EZK32+T is available at Aetrix Electronics and suitable for notebook computers, wireless handsets, digital cameras, and handheld instruments requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX8888EZK32+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 product line was engineered specifically for portable battery-powered equipment - emphasizing ultra-low quiescent current, low dropout, and integrated power-monitoring features like POK to simplify system-level power sequencing.
FAQ
What is the exact output voltage tolerance of the MAX8888EZK32+T over temperature and load?
The MAX8888EZK32+T guarantees ±3% output voltage accuracy across the full operating range: load current from 100µA to 300mA and ambient temperature from −40°C to +85°C. This specification is verified per the Electrical Characteristics table in the official datasheet, with no additional derating required for standard applications.
Does the MAX8888EZK32+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 MAX8888EZK32+T. The MAX8888EZK32+T uses a different internal architecture without BP functionality; only IN, GND, SHDN, POK, and OUT pins are active.
What is the minimum pullup resistance required for the POK pin of the MAX8888EZK32+T?
The MAX8888EZK32+T POK pin is specified to sink ≥1mA when asserted low. To ensure VOL ≤ 0.1V under worst-case conditions, a 100kΩ pullup resistor to OUT is recommended per the datasheet's Applications Information section - this value provides sufficient margin while minimizing current draw during normal operation.
Can the MAX8888EZK32+T operate with input voltages below 2.5V?
No - the absolute minimum input voltage for the MAX8888EZK32+T is 2.5V, as defined in the Absolute Maximum Ratings and Electrical Characteristics tables. Input undervoltage lockout activates below 2.4V (typical), and operation below 2.5V is neither characterized nor guaranteed.
Is the MAX8888EZK32+T pin-compatible with other variants in the MAX8887/MAX8888 family?
Yes - all MAX8887/MAX8888 variants, including MAX8888EZK32+T, share identical 5-pin SOT23 pinout and footprint (Z5-1). The only functional differences between variants are output voltage setting and presence/absence of POK; MAX8887 parts omit POK and include BP instead of POK on pin 4.
MAX8888EZK32+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):
- 3.2V
- 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
MAX8888EZK32+T FAQ
1.How can I place an order for MAX8888EZK32+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8888EZK32+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 MAX8888EZK32+T reliable?
The price and inventory of MAX8888EZK32+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8888EZK32+T is usually 5 days.
3.What payment methods are accepted for MAX8888EZK32+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8888EZK32+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8888EZK32+T?
MAX8888EZK32+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8888EZK32+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 MAX8888EZK32+T?
For technical support, including MAX8888EZK32+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8888EZK32+T requirements.
6.How does Aetrix verify that MAX8888EZK32+T is sourced from the original manufacturer or authorized distributors?
All MAX8888EZK32+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 MAX8888EZK32+T meets industry standards.
7.What is the process for return or replacement of MAX8888EZK32+T?
All MAX8888EZK32+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8888EZK32+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 MAX8888EZK32+T part is unused and in its original packaging.
Return procedure for MAX8888EZK32+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8888EZK32+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 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…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
