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Analog Devices Inc./Maxim Integrated MAX8867EUK28+T
- Part No.:
- MAX8867EUK28+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8867EUK28+T.pdf
- Description:
- IC REG LDO 2.8V 0.15A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX8867EUK28+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 2.8V preset output voltage, 150mA output current capability, 30µVRMS output noise, and 165mV dropout at full load - designed for battery-powered portable electronics requiring stable, clean power under light-to-moderate load conditions.
For engineers reviewing the MAX8867EUK28+T datasheet, MAX8867EUK28+T pinout, MAX8867EUK28+T application, or MAX8867EUK28+T equivalent, key selection criteria include its SOT23-5 package, 10nA shutdown current, reverse battery protection, thermal shutdown behavior, and BP-capacitor–dependent noise performance.
Technical Context
The MAX8867EUK28+T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve low quiescent current (100µA across all load and dropout conditions) and eliminate base-drive losses inherent in PNP-based LDOs. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.
Noise reduction is implemented via a dedicated BP pin connected to an internal 200kΩ resistor, forming an 80Hz low-pass filter when paired with a 0.01µF external ceramic capacitor - enabling 30µVRMS output noise (10Hz–100kHz) with COUT = 10µF. The device includes integrated current limiting (160–500mA range), thermal shutdown at +155°C with 15°C hysteresis, and reverse-battery protection limiting reverse current to 1mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8V ±1.4% - factory-preset, fixed-output configuration eliminating external feedback resistors. |
| Max Output Current | 150mA - supports moderate-power analog/digital loads such as RF front-ends or microcontroller peripherals. |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 2.965V while maintaining regulation, extending battery life in single-cell Li-ion or alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) - ultra-low noise critical for sensitive analog circuits like ADC references or RF synthesizers. |
| Quiescent Current | 100µA - constant across load and dropout, ensuring predictable battery drain in always-on or low-duty-cycle applications. |
| Shutdown Current | 10nA - enables deep-sleep modes in portable devices without significant standby leakage. |
| Input Voltage Range | 2.5V to 6.5V - compatible with single-cell Li-ion (2.7–4.2V), LiFePO₄ (2.0–3.6V), or dual-cell alkaline (2.4–3.2V) sources. |
Pinout & Package
SOT23-5 regular package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body, GND pin serves as thermal pad - requires soldering to large copper area for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable control | Logic low disables regulator and reduces supply current to 10nA; no auto-discharge (distinguishes MAX8867 from MAX8868). |
| 2 - GND | Power ground and thermal path | Electrical return and primary heat dissipation path - must connect to ≥100mm² copper pour for safe 150mA operation. |
| 3 - IN | Input voltage supply | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor to suppress input ripple and ensure stability. |
| 4 - OUT | Regulated output | Delivers up to 150mA at 2.8V; requires 1–10µF output capacitor (X7R/X5R ceramic recommended) for transient response and stability. |
| 5 - BP | Noise-reduction bypass node | Connects to internal 200kΩ resistor; 0.01µF ceramic capacitor reduces output noise to 30µVRMS and sets startup timing. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise architecture | 30µVRMS output noise with 0.01µF BP cap - enables clean power for precision analog signal chains without additional filtering. |
| P-channel MOSFET pass element | 1.1Ω typical RDS(ON) - eliminates base-drive current, sustaining 100µA IQ regardless of load or dropout condition. |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage during incorrect battery insertion. |
| Thermal overload protection | Shuts down at +155°C with +15°C hysteresis - protects device during sustained overloads or poor PCB thermal design. |
| Preset output accuracy | ±1.4% over -40°C to +85°C - eliminates calibration overhead and ensures consistent system-level voltage margining. |
Applications
| Cellular Handset Power Rail | PCMCIA Card Bias Supply |
|---|---|
|
Use Scenario: Powers RF transceiver ICs and baseband processors in GSM/EDGE handsets operating from single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary 2.8V LDO delivering clean, regulated power to noise-sensitive RF sections during transmit bursts. Use Value: 30µVRMS noise and 165mV dropout extend usable battery voltage range and prevent RF desense caused by supply modulation. |
Use Scenario: Supplies 2.8V bias to PCMCIA card interface logic and I/O buffers in laptop expansion slots. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating card circuitry from noisy host system rails. Use Value: 10nA shutdown current enables hot-plug compliance and zero standby drain when card is ejected or inactive. |
| Palmtop Computer Core Logic | Cordless Telephone Baseband |
|
Use Scenario: Regulates 2.8V for ARM7/ARM9 application processors and SRAM in handheld PDAs with tight thermal constraints. IC Role / Device Role / Timing Role: Main system LDO providing stable core voltage during CPU-intensive tasks and sleep transitions. Use Value: Constant 100µA quiescent current simplifies battery life modeling; GND-pin thermal path supports continuous 150mA without derating. |
Use Scenario: Powers DSP and codec ICs in DECT 6.0 cordless telephone handsets using two AA alkaline cells. IC Role / Device Role / Timing Role: Low-noise supply for audio signal path and digital baseband processing. Use Value: Reverse battery protection prevents field failures from user-inserted batteries; ±1.4% output accuracy ensures consistent audio DAC performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-IQ LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8868EUK28+T | Includes active output discharge during shutdown; otherwise identical pinout, specs, and package. | Required where rapid VOUT ramp-down is needed after shutdown (e.g., to meet USB suspend timing). | Select MAX8868EUK28+T only if auto-discharge functionality is explicitly required; MAX8867EUK28+T avoids discharge-related inrush or cross-conduction risks. |
| MCP1702T-2802E/MB | Higher 125mV dropout at 150mA; 18µVRMS noise; no BP pin or reverse-battery protection. | Suitable for cost-sensitive, non-critical analog rails where ultra-low noise and reverse protection are not mandatory. | Choose MCP1702T-2802E/MB only for simpler, lower-performance applications - lacks BP-controlled noise tailoring and failsafe reverse polarity handling. |
Compared with MAX8868EUK28+T, the MAX8867EUK28+T omits auto-discharge but retains identical noise, efficiency, and protection features - making it preferable for systems where uncontrolled VOUT discharge could interfere with sequencing or cause backfeeding. Against MCP1702T-2802E/MB, MAX8867EUK28+T delivers superior noise performance, robust reverse-battery tolerance, and finer dropout control at full load.
Availability
MAX8867EUK28+T is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, palmtop computers, and cordless telephones requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX8867EUK28+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 high-performance analog, mixed-signal, and power-management ICs for demanding industrial, communications, and consumer applications.
The MAX8867/MAX8868 product line targets battery-powered portable electronics needing ultra-low-noise, low-quiescent-current regulation with integrated protection - emphasizing runtime extension, signal integrity, and field reliability.
FAQ
What is the output voltage tolerance of the MAX8867EUK28+T over temperature?
The MAX8867EUK28+T guarantees ±1.4% output voltage accuracy across the full operating temperature range of -40°C to +85°C. This specification is production-tested at +25°C and correlated over temperature using Statistical Quality Control methods - ensuring consistent 2.8V regulation in handheld devices exposed to ambient thermal cycling. The MAX8867EUK28+T achieves this via a trimmed internal resistor divider referenced to a stable 1.25V bandgap.
Does the MAX8867EUK28+T require an external BP capacitor for stable operation?
Yes - the MAX8867EUK28+T requires a 0.01µF ceramic capacitor between the BP pin and GND to achieve its specified 30µVRMS output noise and proper startup timing. Omitting the BP capacitor increases output noise significantly and may cause slow or erratic turn-on behavior. Values above 0.1µF are not recommended, as they increase shutdown exit delay without improving noise performance.
Can the MAX8867EUK28+T be used with input voltages below 2.5V?
No - the MAX8867EUK28+T has an absolute minimum input voltage rating of 2.5V. Operation below this level violates Absolute Maximum Ratings and may result in undefined regulation, increased dropout, or failure to start. For sub-2.5V inputs, consider alternative regulators such as the MAX1725 or TPS7A05 series, which support down to 1.4V or 1.8V input respectively.
How does reverse battery protection work on the MAX8867EUK28+T?
The MAX8867EUK28+T monitors polarity on both IN and SHDN pins; if either falls below GND, internal circuitry disconnects parasitic paths and limits reverse current to ≤1mA. This prevents damage during incorrect battery installation in consumer handhelds. Unlike diode-based solutions, this scheme adds no forward voltage drop or quiescent current penalty during normal operation - preserving the MAX8867EUK28+T's 100µA IQ spec.
Is the MAX8867EUK28+T pin-compatible with the MAX8863 series?
Yes - the MAX8867EUK28+T is pin-compatible with the MAX8863 series in SOT23-5 packages, except for the BP pin. The MAX8863 lacks the BP pin and associated noise-reduction circuitry, resulting in higher output noise (~100µVRMS). When replacing MAX8863 in existing designs, retain the BP pin unconnected or tie it to GND; however, noise performance will not match the MAX8867EUK28+T unless the BP network is added.
MAX8867EUK28+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):
- 2.8V
- 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
MAX8867EUK28+T FAQ
1.How can I place an order for MAX8867EUK28+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EUK28+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 MAX8867EUK28+T reliable?
The price and inventory of MAX8867EUK28+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EUK28+T is usually 5 days.
3.What payment methods are accepted for MAX8867EUK28+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EUK28+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EUK28+T?
MAX8867EUK28+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EUK28+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 MAX8867EUK28+T?
For technical support, including MAX8867EUK28+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EUK28+T requirements.
6.How does Aetrix verify that MAX8867EUK28+T is sourced from the original manufacturer or authorized distributors?
All MAX8867EUK28+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 MAX8867EUK28+T meets industry standards.
7.What is the process for return or replacement of MAX8867EUK28+T?
All MAX8867EUK28+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EUK28+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 MAX8867EUK28+T part is unused and in its original packaging.
Return procedure for MAX8867EUK28+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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