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Analog Devices Inc./Maxim Integrated MAX8867EUK50
- Part No.:
- MAX8867EUK50
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8867EUK50.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
MAX8867EUK50 from Maxim Integrated is a low-noise, low-dropout linear regulator with 5.0V preset output, 150mA output current capability, 30µVRMS output noise, and 165mV dropout at full load. It uses an internal P-channel MOSFET pass transistor and operates from 2.5V to 6.5V input, targeting battery-powered handheld instruments and PCMCIA cards requiring stable, quiet voltage regulation.
For engineers reviewing the MAX8867EUK50 datasheet, MAX8867EUK50 pinout, MAX8867EUK50 application, or MAX8867EUK50 equivalent, key selection criteria include its 100µA operating supply current (even in dropout), ±1.4% output accuracy, 10nA shutdown current, reverse battery protection, and SOT23-5 package compatibility with MAX8863/MAX8864.
Technical Context
The MAX8867EUK50 implements a bandgap-referenced error amplifier driving a P-channel MOSFET pass element with internal feedback divider, enabling fixed 5.0V output without external resistors. Its BP pin accepts a 0.01µF capacitor to form an 80Hz low-pass filter that reduces reference noise contribution to output.
Thermal shutdown activates at +155°C with +15°C hysteresis, and current limiting holds output at ≥160mA minimum under fault. Reverse battery protection limits reverse current to 1mA when VIN or SHDN falls below GND, isolating internal circuitry via controlled disconnect.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1.4% - eliminates need for external feedback resistors and ensures precision rail for 5V logic or analog circuitry. |
| Max Output Current | 150mA - supports moderate-power microcontrollers, sensors, or RF front-ends in space-constrained portable designs. |
| Dropout Voltage | 165mV at 150mA - enables operation down to 5.165V input, extending usable battery life in single-cell Li-ion or multi-cell alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) - meets stringent noise requirements for ADC references, RF synthesizers, or audio bias supplies. |
| Quiescent Current | 100µA (operating), 10nA (shutdown) - minimizes standby drain in always-on battery applications like electronic planners or cordless handsets. |
| Input Voltage Range | 2.5V to 6.5V - accommodates wide battery chemistries including Li-ion (2.7–4.2V), NiMH (0.9–1.4V/cell × 4), and 5V USB-supplied systems. |
| Protection Features | Thermal shutdown (+155°C), short-circuit limit (≥160mA), reverse battery protection (≤1mA reverse current) - ensures robustness in unattended or field-deployed equipment. |
Pinout & Package
SOT23-5 regular package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body, exposed pad not present; GND pin serves dual role as electrical ground and thermal path - requires soldering to PCB ground plane for optimal power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable control | Logic-low (<0.4V) places device in 10nA shutdown; on MAX8867EUK50 (not MAX8868), no auto-discharge - output remains floating. |
| 2 - GND | Power and signal reference | Primary return path for load current and regulator control circuitry; also functions as heatsink - must connect to large copper area for thermal management. |
| 3 - IN | Unregulated input supply | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND close to pin to suppress supply noise and ensure stability. |
| 4 - OUT | Regulated output | Delivers up to 150mA at 5.0V; requires ≥1µF low-ESR ceramic capacitor to GND for transient response and loop stability. |
| 5 - BP | Noise reduction bypass | Connects to internal 200kΩ resistor forming RC filter; 0.01µF ceramic capacitor reduces reference noise contribution to output voltage. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling constant 100µA quiescent current across all load and dropout conditions - critical for battery runtime predictability. |
| BP pin noise filtering | 0.01µF capacitor creates 80Hz low-pass filter on internal reference, reducing integrated output noise to 30µVRMS - directly improves SNR in sensitive analog stages. |
| Reverse battery protection | Active circuitry disconnects internal paths when VIN or SHDN < GND, limiting reverse current to ≤1mA - prevents damage during incorrect battery insertion in consumer devices. |
| Thermal shutdown with hysteresis | Triggers at +155°C junction temperature and re-enables only after cooling by +15°C - prevents thermal runaway while allowing recovery under intermittent overload. |
| Factory-preset 5.0V output | ±1.4% initial accuracy over temperature avoids calibration overhead and simplifies BOM by removing external resistor networks. |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
Use Scenario: Portable multimeters and data loggers powered by two AA/AAA cells with variable discharge profile. IC Role / Device Role / Timing Role: Primary 5V supply regulator for microcontroller, display driver, and precision ADC reference. Use Value: 165mV dropout extends usable battery range to ~5.2V input; 30µVRMS noise ensures <0.1 LSB error in 16-bit ADC measurements. | Use Scenario: Hot-pluggable memory or modem PCMCIA cards drawing burst currents up to 120mA from host 5V bus. IC Role / Device Role / Timing Role: Local LDO providing clean, isolated 5V rail decoupled from noisy host supply. Use Value: 63dB PSRR at 1kHz rejects host supply ripple; 100µA quiescent current minimizes standby drain when card is idle. |
| Cordless Telephones | Electronic Planners |
Use Scenario: Base station or handset using NiMH battery pack with voltage sag under RF transmit load. IC Role / Device Role / Timing Role: Stable 5V supply for DSP, codec, and flash memory interface during high-current bursts. Use Value: Load regulation of ±0.04%/mA maintains 5V within ±3mV across 0–120mA load step - prevents digital reset or audio clipping. | Use Scenario: Battery-backed personal digital assistant with always-on real-time clock and memory retention. IC Role / Device Role / Timing Role: Main system regulator enabling ultra-low-power shutdown mode with 10nA supply current. Use Value: 10nA shutdown current allows >1-year backup from coin cell; reverse battery protection prevents damage during user 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 |
|---|---|---|---|
| TPS76350DBVR | Higher 250mV dropout at 150mA; 50µVRMS noise; 85µA quiescent current; no reverse battery protection. | Lacks reverse polarity protection and has higher noise - unsuitable for battery-replaceable consumer devices requiring robustness. | Select only if board layout already uses SOT23-5 footprint and reverse protection is handled externally. |
| MCP1700T-5002E/TT | 175mV dropout at 250mA; 30µVRMS noise; 2.5µA quiescent current; no BP pin or thermal shutdown. | Lower IQ but missing thermal and short-circuit protection - requires external fault management in industrial environments. | Prefer for ultra-low-power sensor nodes where continuous thermal monitoring is unnecessary and external protection exists. |
Compared with TPS76350DBVR and MCP1700T-5002E/TT, the MAX8867EUK50 uniquely combines 165mV dropout, 30µVRMS noise, 10nA shutdown, reverse battery protection, and thermal shutdown in a single SOT23-5 package - making it optimal for cost-sensitive, safety-critical portable electronics.
Availability
MAX8867EUK50 is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, and cordless telephones requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX8867EUK50 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 industrial, medical, communications, and consumer applications.
The MAX8867/MAX8868 product line delivers low-noise, low-quiescent-current LDOs optimized for battery-powered portable electronics where runtime, output cleanliness, and fault resilience are critical.
FAQ
What is the output voltage tolerance of the MAX8867EUK50 over temperature and load?
The MAX8867EUK50 features ±1.4% output voltage accuracy over the full -40°C to +85°C operating temperature range and across 0–120mA load current. This specification is guaranteed by production testing and SQC correlation - meaning the actual 5.0V output will remain between 4.93V and 5.07V under all specified conditions, ensuring reliable logic-level compatibility and analog reference stability without external trimming.
Does the MAX8867EUK50 provide auto-discharge functionality during shutdown?
No, the MAX8867EUK50 does not include auto-discharge. That feature is exclusive to the MAX8868 variant (e.g., MAX8868EUK50). When the MAX8867EUK50 is placed in shutdown via the SHDN pin, the output floats and retains its voltage until discharged by external circuitry. Designers requiring active output discharge must select the MAX8868EUK50 or add an external bleed resistor.
What capacitor values are required for stable operation of the MAX8867EUK50?
The MAX8867EUK50 requires a minimum 1µF ceramic capacitor (X7R/X5R dielectric recommended) on both IN and OUT pins, plus a 0.01µF ceramic capacitor on the BP pin. For improved load-transient response and lower noise, COUT may be increased to 10µF. Capacitors must have low ESR (<0.2Ω typical); Z5U/Y5V dielectrics may require ≥2.2µF for stability below -10°C.
Can the MAX8867EUK50 operate from a 2.7V lithium-ion battery?
Yes, the MAX8867EUK50 operates from 2.5V to 6.5V input, making it compatible with single-cell Li-ion batteries (2.7V–4.2V). At end-of-life (~2.7V), the 165mV dropout allows 5.0V output only if input exceeds 5.165V - so it cannot regulate 5.0V directly from a depleted Li-ion cell. It is suitable for 5V systems powered by ≥2-cell alkaline/NiMH or boosted Li-ion sources.
Is the MAX8867EUK50 pin-compatible with other regulators in the same family?
Yes, the MAX8867EUK50 is pin-compatible with the MAX8863 and MAX8864 in SOT23-5 packages, differing only in the BP pin function (absent on MAX8863/64). It is also footprint-compatible with the MAX8868EUK50, though the latter adds auto-discharge. This allows direct substitution in existing layouts where BP is unused or can be left unconnected.
MAX8867EUK50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 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:
- SOT-23-5
MAX8867EUK50 FAQ
1.How can I place an order for MAX8867EUK50 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EUK50 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 MAX8867EUK50 reliable?
The price and inventory of MAX8867EUK50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EUK50 is usually 5 days.
3.What payment methods are accepted for MAX8867EUK50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EUK50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EUK50?
MAX8867EUK50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EUK50 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 MAX8867EUK50?
For technical support, including MAX8867EUK50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EUK50 requirements.
6.How does Aetrix verify that MAX8867EUK50 is sourced from the original manufacturer or authorized distributors?
All MAX8867EUK50 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 MAX8867EUK50 meets industry standards.
7.What is the process for return or replacement of MAX8867EUK50?
All MAX8867EUK50 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EUK50, 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 MAX8867EUK50 part is unused and in its original packaging.
Return procedure for MAX8867EUK50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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