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Analog Devices Inc./Maxim Integrated MAX8867EZK25
- Part No.:
- MAX8867EZK25
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8867EZK25.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,730
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Product details
Overview
MAX8867EZK25 from Maxim Integrated is a low-noise, low-dropout linear regulator with 2.5V fixed output, 150mA output current capability, 30µVRMS output noise, and 165mV dropout at full load. It uses an internal P-channel MOSFET pass transistor, operates from 2.5V to 6.5V input, and features 10nA logic-controlled shutdown - ideal for battery-powered handheld instruments and PCMCIA cards requiring stable, quiet voltage regulation.
For engineers reviewing the MAX8867EZK25 datasheet, MAX8867EZK25 pinout, MAX8867EZK25 application, or MAX8867EZK25 equivalent, this page delivers verified technical context, exact SOT23-5 thin-package pin mapping, real-world load-transient behavior, and validated alternative parts for portable power management design.
Technical Context
The MAX8867EZK25 implements a 1.25V bandgap reference and error amplifier driving a 1.1Ω typical P-channel MOSFET pass transistor, enabling ultra-low quiescent current (100µA) independent of load or dropout condition. Its BP pin connects to an internal 200kΩ resistor forming an 80Hz low-pass filter with a 0.01µF external capacitor, directly reducing output voltage noise.
Thermal-overload protection activates at +170°C junction temperature with 20°C hysteresis, and reverse battery protection limits reverse supply current to 1mA when VIN or SHDN falls below ground. The device includes current limiting (160–500mA range) and short-circuit survival with infinite duration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1.4% - factory-trimmed for precision without external resistors. |
| Max Output Current | 150mA continuous - sufficient for RF front-ends and microcontroller cores in portable devices. |
| Dropout Voltage | 165mV at 150mA - enables operation down to 2.665V input with 2.5V output, extending battery life. |
| Output Noise | 30µVRMS (10Hz–100kHz) - low enough for noise-sensitive analog circuits like ADC references. |
| Quiescent Current | 100µA operating / 10nA shutdown - preserves battery capacity during sleep modes. |
| Input Voltage Range | 2.5V to 6.5V - compatible with single Li-ion, dual alkaline, or regulated 3.3V/5V rails. |
| PSRR | 63dB at low frequency - suppresses ripple from noisy switchers or aging batteries. |
Pinout & Package
SOT23-5 thin package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body height, GND pin serves as thermal pad - requires soldering to PCB ground plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable control | Logic low (≤0.4V) reduces supply current to 10nA; open or high (≥2.0V) enables regulation. |
| 2 - GND | Power and thermal reference | Electrical ground return path and primary heat dissipation channel - must connect to large copper area. |
| 3 - IN | Unregulated input supply | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass capacitor to minimize line transients. |
| 4 - OUT | Regulated output | Delivers 2.5V up to 150mA; requires 1–10µF low-ESR capacitor for stability and transient response. |
| 5 - BP | Noise-reduction bypass node | Connects to 0.01µF ceramic capacitor to reduce output noise via internal 200kΩ RC filter. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise architecture | 30µVRMS output noise with 0.01µF BP cap - eliminates need for post-regulator filtering in audio/sensor paths. |
| P-channel MOSFET pass element | 1.1Ω RDS(ON) - enables constant 100µA IQ across all load and dropout conditions, unlike PNP-based LDOs. |
| Reverse battery protection | 1mA max reverse current when VIN or SHDN < 0V - prevents damage during incorrect battery insertion. |
| Thermal shutdown with hysteresis | +170°C trip / +150°C recovery - provides self-resetting fault protection without system-level intervention. |
| Current limit with short-circuit tolerance | 160mA min / 500mA max limit - allows indefinite output shorting without latch-up or degradation. |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
Use Scenario: Portable multimeters and data loggers powered by two AA cells with variable load profiles. IC Role / Device Role / Timing Role: Primary 2.5V supply for 16-bit SAR ADC and low-power MCU, replacing discrete Zener+transistor regulators. Use Value: 30µVRMS noise ensures ≤1 LSB error in 16-bit conversions; 100µA quiescent current extends battery life beyond 100 hours. | Use Scenario: Hot-pluggable memory or modem PCMCIA cards drawing bursty 100mA loads from 3.3V host rails. IC Role / Device Role / Timing Role: Local 2.5V LDO for card-specific logic and interface buffers, decoupling from noisy host supply. Use Value: 165mV dropout allows reliable 2.5V output even when host rail sags to 2.65V; 12mV load transient overshoot meets JEIDA timing margins. |
| Palmtop Computers | Modems |
Use Scenario: Compact PDAs with flash memory, LCD controller, and IR transceiver sharing a shared 2.5V domain. IC Role / Device Role / Timing Role: Dedicated 2.5V regulator for flash memory VCCQ, isolated from digital switching noise on main 3.3V rail. Use Value: PSRR >60dB below 10kHz rejects coupling from CPU clock harmonics; BP pin filtering eliminates 1/f noise affecting memory write margins. | Use Scenario: Embedded dial-up modems in industrial gateways using alkaline batteries with wide voltage decay profile. IC Role / Device Role / Timing Role: Stable 2.5V bias for analog front-end (AFE) and line-driver op-amps during call setup and data transmission. Use Value: 2.5V ±1.4% accuracy maintains AFE gain calibration across -40°C to +85°C; reverse battery protection prevents field failure during battery replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8863EUK25-T | Same pinout and 2.5V output, but lacks BP pin and achieves 50µVRMS noise (vs. 30µVRMS). | No BP capacitor required; suitable where ultra-low noise is non-critical but board space is constrained. | Select MAX8863EUK25-T only if noise budget allows ≥50µVRMS and BP routing is impractical. |
| MCP1700T-2502E/MB | 2.5V fixed output, 250mA rating, 115µA IQ, but 170mV dropout at 250mA and no reverse battery protection. | Higher current headroom and smaller SOT23-3 footprint, but requires external reverse-polarity diode for battery systems. | Choose MCP1700T-2502E/MB for cost-sensitive designs needing >150mA or simpler 3-pin layout, accepting higher noise and added protection components. |
Compared with MAX8867EZK25, MAX8863EUK25-T trades 20µVRMS noise reduction for BP-pin elimination, while MCP1700T-2502E/MB offers higher current and smaller package at the expense of reverse-battery safety and noise performance - making MAX8867EZK25 optimal for compact, battery-fed analog-intensive systems.
Availability
MAX8867EZK25 is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, palmtop computers, and modems requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance over -40°C to +85°C.
Supply support for MAX8867EZK25 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, medical, and portable applications.
The MAX8867/MAX8868 product line targets battery-powered equipment requiring ultra-low noise, minimal quiescent current, and robust fault protection - specifically engineered for handheld instrumentation and peripheral cards where size, efficiency, and signal integrity are critical.
FAQ
What is the exact output voltage tolerance and temperature drift of the MAX8867EZK25?
The MAX8867EZK25 has a factory-trimmed output voltage of 2.5V with ±1.4% accuracy over -40°C to +85°C. Typical output voltage drift versus temperature is ±0.01%/°C, resulting in ≤±2.5mV variation across the full operating range at 50mA load - confirmed by Figure MAX8867/8-07 in the datasheet.
Does the MAX8867EZK25 require an external BP capacitor, and what happens if it's omitted?
Yes, the MAX8867EZK25 requires a 0.01µF ceramic capacitor between BP and GND to achieve its specified 30µVRMS output noise. Omitting it increases output noise to ~50µVRMS (comparable to MAX8863), degrades PSRR above 1kHz, and may cause instability under light-load conditions per the Region of Stable COUT ESR graph.
Can the MAX8867EZK25 be used with input voltages below 2.5V?
No - the absolute minimum input voltage for the MAX8867EZK25 is 2.5V, as specified in Absolute Maximum Ratings and Electrical Characteristics. Operation below 2.5V violates functional specifications and may result in unregulated output or undefined behavior; the device will not regulate at VIN < VOUT + dropout (i.e., <2.665V for 2.5V output).
How does the MAX8867EZK25 handle short-circuit conditions, and is external current limiting needed?
The MAX8867EZK25 incorporates internal current limiting with a typical trip point of 390mA and guaranteed minimum of 160mA. It safely withstands indefinite output short-circuit to GND without damage or thermal runaway, eliminating need for external foldback or fuse protection in most applications.
Is the MAX8867EZK25 pin-compatible with the MAX8868EZK25, and what functional differences exist?
Yes, MAX8867EZK25 and MAX8868EZK25 share identical pinout, package, and electrical specs except for the auto-discharge function: MAX8868 actively discharges the OUT pin to GND during shutdown, while MAX8867 holds output voltage. This makes MAX8867EZK25 preferable where output hold-up is required after shutdown.
MAX8867EZK25 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):
- 6.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- 63dB (10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MAX8867EZK25 FAQ
1.How can I place an order for MAX8867EZK25 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EZK25 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 MAX8867EZK25 reliable?
The price and inventory of MAX8867EZK25 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EZK25 is usually 5 days.
3.What payment methods are accepted for MAX8867EZK25?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EZK25 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EZK25?
MAX8867EZK25 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EZK25 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 MAX8867EZK25?
For technical support, including MAX8867EZK25 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EZK25 requirements.
6.How does Aetrix verify that MAX8867EZK25 is sourced from the original manufacturer or authorized distributors?
All MAX8867EZK25 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 MAX8867EZK25 meets industry standards.
7.What is the process for return or replacement of MAX8867EZK25?
All MAX8867EZK25 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EZK25, 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 MAX8867EZK25 part is unused and in its original packaging.
Return procedure for MAX8867EZK25:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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