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Analog Devices Inc./Maxim Integrated MAX8867EUK25+T
- Part No.:
- MAX8867EUK25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8867EUK25+T.pdf
- Description:
- IC REG LINEAR 2.5V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,717
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Product details
Overview
MAX8867EUK25+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 2.5V fixed output, 150mA output current capability, 30µVRMS output noise, 165mV dropout at full load, and 100µA operating supply current. It uses an internal P-channel MOSFET pass transistor and operates from 2.5V to 6.5V input, targeting battery-powered portable electronics requiring stable, quiet voltage regulation.
For engineers reviewing the MAX8867EUK25+T datasheet, MAX8867EUK25+T pinout, MAX8867EUK25+T application, or MAX8867EUK25+T equivalent, key selection criteria include output noise performance, dropout behavior near end-of-battery-life, shutdown current (10nA), reverse battery protection, and SOT23-5 package compatibility with space-constrained handheld designs.
Technical Context
The MAX8867EUK25+T implements a bandgap-referenced error amplifier driving a P-channel MOSFET pass element, enabling ultra-low quiescent current (100µA) independent of load or dropout condition. Its BP pin accepts a 0.01µF capacitor to form an 80Hz low-pass filter that reduces reference noise, directly contributing to the 30µVRMS output noise specification.
Thermal shutdown activates at +155°C with +15°C hysteresis, and current limiting holds output at ≥160mA minimum under fault conditions. Reverse battery protection limits reverse current to 1mA when VIN or SHDN falls below ground - a critical feature for single-cell Li-ion and alkaline systems where polarity reversal can occur during insertion or failure.
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 baseband processors, RF front-ends, and sensor subsystems in portable devices. |
| Dropout Voltage | 165mV at 150mA - enables operation down to 2.665V input, extending usable battery life in 2.7–3.6V systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) - achieved via BP pin filtering; suitable for noise-sensitive analog/RF circuitry. |
| Quiescent Current | 100µA over full load and dropout range - preserves battery runtime in always-on or low-duty-cycle applications. |
| Shutdown Current | 10nA logic-controlled - reduces system standby power to nanoampere level when disabled. |
| Input Voltage Range | 2.5V to 6.5V - supports single Li-ion, dual alkaline/NiMH, and USB-powered configurations. |
Pinout & Package
SOT23-5 regular package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body, thermal pad on GND pin for enhanced heat dissipation. GND serves as both electrical reference and heatsink - requires connection to large PCB copper area.
| 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 (MAX8868 only has discharge function). |
| 2 - GND | Power ground and thermal path | Primary return path for load current; soldered to PCB ground plane to manage thermal resistance (θJB = 140°C/W). |
| 3 - IN | Input voltage supply | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor to suppress line noise and ensure stability. |
| 4 - OUT | Regulated output | Delivers 2.5V at up to 150mA; requires ≥1µF low-ESR output capacitor for transient response and stability. |
| 5 - BP | Noise-reduction bypass node | Connects to 0.01µF ceramic capacitor to filter reference noise; determines output noise floor and startup time. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 30µVRMS output noise with 0.01µF BP cap - enables clean power for ADCs, VCOs, and RF synthesizers. |
| P-channel pass architecture | 100µA quiescent current independent of load or dropout - eliminates base-drive losses seen in PNP-based LDOs. |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN < 0V - prevents damage during incorrect battery insertion. |
| Thermal and short-circuit protection | Shuts down at +155°C junction temperature with +15°C hysteresis; survives indefinite output short to GND. |
| Preset output accuracy | ±1.4% over -40°C to +85°C - eliminates need for external feedback resistors and associated layout sensitivity. |
Applications
| Cellular Handset Power Rail | PCMCIA Card Core Supply |
|---|---|
|
Use Scenario: Powers baseband processor I/O or RF transceiver bias circuitry in GSM/EDGE handsets using single Li-ion cell. IC Role / Device Role / Timing Role: Primary low-noise 2.5V supply delivering stable voltage despite battery voltage sag from 4.2V to 2.7V. Use Value: 165mV dropout ensures regulation until battery reaches 2.665V; 30µVRMS noise avoids RF desensitization and bit errors. |
Use Scenario: Provides regulated 2.5V core voltage for PCMCIA Type II memory or modem cards inserted into laptops. IC Role / Device Role / Timing Role: Standalone LDO supplying logic voltage to card controller ICs with hot-swap and reverse-polarity tolerance. Use Value: Reverse battery protection prevents damage if card is inserted upside-down; 10nA shutdown enables zero-power card ejection detection. |
| Palmtop Computer LCD Bias | Hand-Held Instrument Reference Supply |
|
Use Scenario: Generates clean 2.5V for LCD segment driver ICs in monochrome palmtop PDAs with AA/AAA battery packs. IC Role / Device Role / Timing Role: Low-noise auxiliary rail decoupled from noisy digital supply, supporting precise analog bias generation. Use Value: BP pin filtering reduces ripple-induced display flicker; 100µA IQ extends runtime between battery changes in intermittent-use devices. |
Use Scenario: Supplies reference voltage to 12-bit SAR ADC and op-amp signal chain in portable multimeters or data loggers. IC Role / Device Role / Timing Role: Precision analog supply isolating measurement circuitry from switching regulator noise and battery impedance variation. Use Value: ±1.4% output accuracy over temperature ensures measurement repeatability; low noise avoids ADC quantization uncertainty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-IQ LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/TT | 250mA output, 6µA IQ, 170mV dropout at 250mA, no BP pin or reverse battery protection. | Lacks noise filtering and polarity protection; suited for cost-sensitive, non-battery-reversal applications. | Select when higher output current and lower quiescent current outweigh noise and protection requirements. |
| Torex XC6206P252MR-G | 150mA output, 3.5µA IQ, 160mV dropout at 100mA, no shutdown, no reverse protection, SOT-23-3. | 3-pin package lacks enable and BP functions; not suitable for shutdown-controlled or noise-critical systems. | Choose only for simple, always-on 2.5V rails where board space is constrained and features are secondary. |
Compared with MCP1700T-2502E/TT and XC6206P252MR-G, the MAX8867EUK25+T uniquely combines 30µVRMS noise, 10nA shutdown, reverse battery protection, and thermal/short-circuit safety in a 5-pin SOT23 - making it the only option qualified for robust, battery-powered instrumentation and communications equipment.
Availability
MAX8867EUK25+T is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, palmtop computers, and hand-held instruments requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX8867EUK25+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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX8867/MAX8868 product line was designed specifically for battery-powered portable electronics needing ultra-low noise, low IQ, and robust fault protection - targeting space-constrained, single-cell systems where reliability and runtime are critical.
FAQ
What is the output voltage tolerance of the MAX8867EUK25+T over temperature?
The MAX8867EUK25+T maintains output voltage accuracy of ±1.4% over the full operating temperature range of -40°C to +85°C. This is guaranteed by factory trimming and confirmed in the Electrical Characteristics table. At +25°C, typical deviation is tighter, but design margin must be based on the ±1.4% limit. The MAX8867EUK25+T does not require external components to achieve this accuracy.
Does the MAX8867EUK25+T include reverse battery protection, and how does it behave?
Yes, the MAX8867EUK25+T includes reverse battery protection that limits reverse current to ≤1mA when either IN or SHDN falls below ground potential. This is implemented via internal circuitry that disconnects parasitic paths - preventing damage during incorrect battery insertion or fault conditions. Unlike the MAX8868, the MAX8867EUK25+T does not provide auto-discharge during shutdown.
What capacitor values are required for stable operation of the MAX8867EUK25+T?
For stable operation, the MAX8867EUK25+T requires a minimum 1µF ceramic capacitor on IN and a 1µF to 10µF ceramic capacitor on OUT (X7R/X5R dielectric recommended). A 0.01µF ceramic capacitor must be placed on the BP pin to achieve 30µVRMS noise. Using Z5U/Y5V dielectrics may require ≥2.2µF for low-temperature stability, per the datasheet's Region of Stable COUT ESR graph.
How does the dropout voltage of the MAX8867EUK25+T change with load current?
The dropout voltage of the MAX8867EUK25+T increases linearly with load due to its P-channel MOSFET RDS(ON) (~1.1Ω typical). It is specified as 55mV at 50mA and 165mV at 150mA. At 100mA, typical dropout is ~110mV. This relationship is confirmed in Figure MAX8867/8-10 and MAX8867/8-11 of the datasheet, showing monotonic increase across -40°C to +85°C.
Is the MAX8867EUK25+T pin-compatible with other regulators in the same family?
Yes, the MAX8867EUK25+T is pin-compatible with the MAX8863 and MAX8864, except for the BP pin - which is unused on those parts. It shares the same SOT23-5 footprint, IN/GND/OUT/SHDN pinout, and thermal characteristics. However, the BP pin on the MAX8867EUK25+T must be externally bypassed with 0.01µF; leaving it floating will degrade noise performance.
MAX8867EUK25+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- 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:
- SOT-23-5
MAX8867EUK25+T FAQ
1.How can I place an order for MAX8867EUK25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EUK25+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 MAX8867EUK25+T reliable?
The price and inventory of MAX8867EUK25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EUK25+T is usually 5 days.
3.What payment methods are accepted for MAX8867EUK25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EUK25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EUK25+T?
MAX8867EUK25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EUK25+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 MAX8867EUK25+T?
For technical support, including MAX8867EUK25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EUK25+T requirements.
6.How does Aetrix verify that MAX8867EUK25+T is sourced from the original manufacturer or authorized distributors?
All MAX8867EUK25+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 MAX8867EUK25+T meets industry standards.
7.What is the process for return or replacement of MAX8867EUK25+T?
All MAX8867EUK25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EUK25+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 MAX8867EUK25+T part is unused and in its original packaging.
Return procedure for MAX8867EUK25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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