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Analog Devices Inc./Maxim Integrated MAX8867EUK40+T
- Part No.:
- MAX8867EUK40+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8867EUK40+T.pdf
- Description:
- IC REG LINEAR 4V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,916
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Product details
Overview
MAX8867EUK40+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 4.0V preset output voltage, 150mA output current capability, 30µVRMS output noise, and 165mV dropout at full load. It operates from 2.5V to 6.5V input and delivers stable power to RF front-ends and precision analog circuitry in portable battery-powered devices.
For engineers reviewing the MAX8867EUK40+T datasheet, MAX8867EUK40+T pinout, MAX8867EUK40+T application, or MAX8867EUK40+T equivalent, this page provides verified technical context, real-world design meaning for key specs, validated SOT23-5 pin mapping, application-specific implementation guidance, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The MAX8867EUK40+T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) enabling ultra-low quiescent current (100µA) independent of load or dropout condition. Its 1.25V bandgap reference feeds an error amplifier that controls the pass gate via internal feedback, delivering ±1.4% output accuracy over temperature and load.
Noise reduction is achieved through a dedicated BP pin with external 0.01µF capacitor forming an 80Hz low-pass filter; thermal shutdown activates at +155°C with 15°C hysteresis, and reverse battery protection limits reverse current to 1mA when VIN or SHDN falls below ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.0V preset (±1.4% accuracy over -40°C to +85°C), factory-trimmed, no external resistors required |
| Max Output Current | 150mA continuous; current limit set to 160mA min / 390mA typ ensures safe short-circuit operation |
| Dropout Voltage | 165mV at 150mA (VIN ≥ 4.165V required for regulated 4.0V output), enables extended battery runtime |
| Output Noise | 30µVRMS (10Hz–100kHz, CBP=0.01µF, COUT=10µF), suitable for RF and ADC reference supplies |
| Quiescent Current | 100µA operating (in dropout or full load), 10nA in logic-controlled shutdown - preserves battery life |
| PSRR | 63dB at low frequency, rolls off above 10kHz - adequate for battery-derived supplies but not high-noise SMPS inputs |
| Thermal Shutdown | Triggers at +155°C with +15°C hysteresis - protects against sustained overload without latch-off |
Pinout & Package
SOT23-5 regular package (5-pin surface-mount, 1.6mm × 2.9mm × 1.1mm body height); GND pin serves dual role as electrical return and thermal path - requires soldering to large copper area for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low shutdown control | Logic low reduces supply current to 10nA; must be pulled high (to IN or VIN) for normal operation |
| 2 - GND | Ground reference and thermal sink | Electrical return path and primary heat conduction path - connect to PCB ground plane with ≥4 thermal vias |
| 3 - IN | Input voltage supply | Accepts 2.5V–6.5V; requires 1µF bypass capacitor (low-ESR ceramic) close to pin for stability and line rejection |
| 4 - OUT | Regulated output | Delivers up to 150mA at 4.0V; requires 1–10µF output capacitor (X7R/X5R ceramic preferred) for transient response |
| 5 - BP | Noise-reduction bypass | Connects to internal 200kΩ resistor; 0.01µF ceramic capacitor here reduces output noise to 30µVRMS |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 30µVRMS output noise enables clean power for RF ICs and high-resolution ADCs without additional filtering |
| P-channel pass architecture | Eliminates base-drive current loss - maintains 100µA IQ across all load conditions including dropout |
| Reverse battery protection | Blocks >99% of reverse current (<1mA) when VIN or SHDN goes negative - prevents damage in miswired battery compartments |
| Thermal and short-circuit protection | Auto-recovers from overload: shuts down at +155°C and restarts after cooling by 15°C - no latch-up or manual reset needed |
| Preset output voltage | Factory-trimmed 4.0V (±1.4%) eliminates external resistor network - reduces BOM count and layout area |
Applications
| Cellular RF Power Amplifier Bias | Portable Medical Sensor Front-End |
|---|---|
|
Use Scenario: Providing ultra-low-noise bias voltage to GaAs pHEMT power amplifiers in GSM/UMTS handsets where PSRR and spectral purity directly impact adjacent-channel leakage. IC Role / Device Role / Timing Role: Primary LDO supplying PA collector voltage; BP pin decoupling suppresses switching noise coupling into RF path. Use Value: 30µVRMS noise and 63dB PSRR at baseband frequencies reduce AM-to-PM distortion and improve EVM by ≥1.2dB versus standard LDOs. |
Use Scenario: Powering low-power op-amps and 16-bit sigma-delta ADCs in handheld ECG monitors requiring sub-50µV RMS noise on analog supply rails. IC Role / Device Role / Timing Role: Precision analog rail generator; fixed 4.0V output matches common reference ICs (e.g., REF3040) for ratiometric measurement. Use Value: ±1.4% output accuracy over temperature and 100µA quiescent current extend single-cell Li-ion battery life to >72 hours per charge. |
| PCMCIA Card Core Logic Supply | Industrial Handheld Data Logger |
|
Use Scenario: Delivering stable 4.0V core voltage to 3.3V-tolerant microcontrollers and SRAM in hot-pluggable PCMCIA Type II cards with tight space constraints. IC Role / Device Role / Timing Role: Compact, pin-compatible replacement for legacy regulators; SOT23-5 footprint fits legacy layouts without redesign. Use Value: 165mV dropout allows operation down to 4.165V input - extends usable range of 4.2V Li-ion cells by ~18 minutes before brownout. |
Use Scenario: Regulating power for low-power Cortex-M0+ MCU, EEPROM, and RS-485 transceiver in battery-operated environmental loggers deployed in remote field locations. IC Role / Device Role / Timing Role: Main system regulator with shutdown control synchronized to MCU sleep mode; reverse battery protection guards against field technician errors. Use Value: 10nA shutdown current reduces annual battery drain to <1.5mAh - enables 5-year operation on a single CR123A cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78240DRVT | 4.0V output, 150mA, 17µVRMS noise, but 250mV dropout at 150mA and 250nA shutdown current | Better noise performance, but higher dropout reduces battery life in deep-discharge scenarios | Prefer when lowest possible noise dominates over efficiency; verify thermal margin at 150mA in SOT23-5 |
| MCP1703T-4002E/MB | 4.0V output, 250mA, 30µVRMS noise, 600mV dropout at 250mA, 2µA quiescent current | Higher current rating but significantly higher dropout and quiescent current erodes battery runtime | Choose only if future-proofing for >150mA loads is required; not optimal for battery-critical designs |
Compared with MAX8867EUK40+T, TPS78240DRVT offers lower noise but sacrifices 85mV in dropout voltage and increases shutdown current 25×, while MCP1703T-4002E/MB trades 300mV higher dropout and 20× higher quiescent current for extra current headroom - neither matches the balanced low-noise/low-dropout/ultra-low-IQ profile of the MAX8867EUK40+T.
Availability
MAX8867EUK40+T is available at Aetrix Electronics and suitable for cellular telephones, handheld medical instruments, and industrial data loggers requiring stable component supply with guaranteed long-term continuity.
Supply support for MAX8867EUK40+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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, communications, and consumer applications.
The MAX8867/MAX8868 family was engineered specifically for battery-powered portable electronics needing ultra-low noise, minimal dropout, and nanoscale shutdown current - targeting RF subsystems and high-fidelity sensor interfaces.
FAQ
What is the exact output voltage tolerance of the MAX8867EUK40+T over its full operating temperature range?
The MAX8867EUK40+T has a factory-preset output voltage of 4.0V with ±1.4% accuracy over the full -40°C to +85°C operating temperature range, as specified in the Electrical Characteristics table. This tolerance includes initial calibration error, line regulation, load regulation, and thermal drift - no external trimming is required or supported.
Does the MAX8867EUK40+T include auto-discharge functionality during shutdown?
No, the MAX8867EUK40+T does not include auto-discharge. That feature is exclusive to the MAX8868 variant (e.g., MAX8868EUK40+T). The MAX8867EUK40+T enters 10nA shutdown mode when SHDN is pulled low but leaves the output floating - external discharge circuitry is required if rapid VOUT decay is needed.
What capacitor values are mandatory for stable operation of the MAX8867EUK40+T?
For stable operation, the MAX8867EUK40+T requires a minimum 1µF X7R or X5R ceramic capacitor on both IN and OUT pins, plus a 0.01µF ceramic capacitor on the BP pin. Using Z5U/Y5V dielectrics may require ≥2.2µF on OUT for stability below -10°C; tantalum capacitors need ≥2.2µF to maintain ESR within the stable region shown in Figure 17.
Can the MAX8867EUK40+T operate with an input voltage lower than 4.0V?
Yes, but only in dropout mode. The MAX8867EUK40+T can accept input voltages as low as 2.5V. When VIN drops below VOUT + dropout voltage (e.g., <4.165V at 150mA), regulation is lost and VOUT follows VIN minus RDS(ON) × ILOAD. It remains functional but unregulated - useful for extending battery life until cutoff.
Is the MAX8867EUK40+T pin-compatible with the MAX8863 series?
Yes, the MAX8867EUK40+T is pin-compatible with the MAX8863 and MAX8864 except for the BP pin. The MAX8863/64 lack the BP pin and associated noise-reduction circuitry - using MAX8867EUK40+T in a MAX8863 layout requires leaving BP unconnected or grounding it, resulting in higher output noise (≈70µVRMS vs. 30µVRMS).
MAX8867EUK40+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 4V
- 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
MAX8867EUK40+T FAQ
1.How can I place an order for MAX8867EUK40+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EUK40+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 MAX8867EUK40+T reliable?
The price and inventory of MAX8867EUK40+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EUK40+T is usually 5 days.
3.What payment methods are accepted for MAX8867EUK40+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EUK40+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EUK40+T?
MAX8867EUK40+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EUK40+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 MAX8867EUK40+T?
For technical support, including MAX8867EUK40+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EUK40+T requirements.
6.How does Aetrix verify that MAX8867EUK40+T is sourced from the original manufacturer or authorized distributors?
All MAX8867EUK40+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 MAX8867EUK40+T meets industry standards.
7.What is the process for return or replacement of MAX8867EUK40+T?
All MAX8867EUK40+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EUK40+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 MAX8867EUK40+T part is unused and in its original packaging.
Return procedure for MAX8867EUK40+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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