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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:
- FIXED POSITIVE LDO REGULATOR, 2.
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX8867EUK25-T from Maxim Integrated is a low-noise, low-dropout linear regulator with a factory-preset 2.5V output, 150mA maximum output current, 30µVRMS output noise, and 165mV dropout at full load. It features an internal P-channel MOSFET pass transistor, 100µA operating supply current (independent of load or dropout), and reverse battery protection. It is used in space-constrained, battery-powered portable electronics requiring stable low-noise voltage regulation.
For engineers reviewing the MAX8867EUK25-T datasheet, MAX8867EUK25-T pinout, MAX8867EUK25-T application, or MAX8867EUK25-T equivalent, key selection criteria include guaranteed 2.5V ±1.4% accuracy over -40°C to +85°C, ultra-low shutdown current (10nA), BP-pin noise filtering capability, and SOT23-5 regular package compatibility with MAX8863/MAX8864 footprints.
Technical Context
The MAX8867EUK25-T implements a fixed-output LDO architecture using a 1.25V bandgap reference, error amplifier, and internal resistor divider to set the 2.5V output. Its P-channel MOSFET pass element eliminates base-drive current, enabling constant 100µA quiescent current across all operating conditions-including dropout-unlike PNP-based regulators.
It integrates dedicated circuitry for reverse battery protection (limits reverse current to 1mA), thermal shutdown (trip at +155°C with 15°C hysteresis), and short-circuit protection. The BP pin connects to an internal 200kΩ resistor forming an 80Hz low-pass filter with an external 0.01µF capacitor, directly reducing output voltage noise to 30µVRMS (10Hz–100kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V ±1.4% over -40°C to +85°C - ensures stable rail for 2.5V logic, ADC references, or RF biasing without external feedback. |
| Max Output Current | 150mA - supports moderate-power microcontrollers, sensors, or RF front-ends in handheld devices. |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 2.65V, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP cap - meets stringent noise requirements for precision analog circuits and low-phase-noise RF stages. |
| Quiescent Current | 100µA (active), 10nA (shutdown) - minimizes standby power loss in always-on or wake-on-event battery applications. |
| Input Voltage Range | 2.5V to 6.5V - accommodates single-cell Li-ion (2.7–4.2V), dual-cell alkaline (3–6V), and regulated intermediate rails. |
| Protection Features | Reverse battery (≤1mA reverse current), thermal shutdown (+155°C), short-circuit - enables robust deployment in consumer and industrial portable equipment. |
Pinout & Package
SOT23-5 regular package (5-pin, 1.6mm × 2.9mm × 1.1mm body height), thermally enhanced with GND pin acting as heatsink. Requires soldering to large PCB ground plane for optimal thermal performance and power dissipation (571mW at +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable input | Logic low (≤0.4V) disables regulator and reduces IQ to 10nA; on MAX8868 only, also activates auto-discharge - not applicable to MAX8867EUK25-T. |
| 2 - GND | Ground reference & thermal path | Electrical return and primary heat conduction path; must connect to large copper area to maintain junction temperature ≤+150°C under load. |
| 3 - IN | Input voltage supply | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor to suppress supply noise and ensure stability. |
| 4 - OUT | Regulated output | Delivers up to 150mA at 2.5V; requires ≥1µF output capacitor (X7R/X5R ceramic, ESR <0.2Ω) for transient response and stability. |
| 5 - BP | Noise reduction bypass | Connects to internal 200kΩ resistor; 0.01µF ceramic capacitor here reduces output noise by filtering reference noise - critical for low-noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 30µVRMS achieved via BP-pin RC filter (200kΩ + 0.01µF), enabling clean power for RF ICs and precision ADCs. |
| Load-independent quiescent current | 100µA maintained from no-load to 150mA and across dropout - maximizes battery runtime in variable-load applications. |
| Reverse battery protection | Active circuitry limits reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage during battery insertion errors. |
| P-channel MOSFET pass device | 1.1Ω typical RDS(ON) eliminates base-drive losses, avoiding efficiency degradation and thermal runaway seen in PNP-based LDOs. |
| Thermal and short-circuit protection | Auto-recovering shutdown at +155°C (15°C hysteresis) and indefinite short-to-ground tolerance - ensures reliability in unattended operation. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
Use Scenario: Powering baseband processor I/O rails and camera module interfaces in GSM/UMTS handsets with single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-noise 2.5V LDO supplying noise-sensitive analog sections while maintaining tight regulation during RF transmit bursts. Use Value: 30µVRMS noise prevents signal corruption in RF receivers; 165mV dropout extends talk time by >12 minutes per charge cycle vs. higher-dropout alternatives. | Use Scenario: Providing regulated 2.5V supply to SRAM, flash memory, and interface logic in hot-pluggable PCMCIA Type II cards. IC Role / Device Role / Timing Role: Primary voltage regulator delivering stable 2.5V during card insertion/removal transients and varying host bus loading. Use Value: 10nA shutdown current prevents battery drain when card is ejected; reverse battery protection avoids latch-up during misinsertion. |
| Hand-Held Instruments | Palmtop Computers |
Use Scenario: Supplying precision analog front-end (AFE) and microcontroller core voltage in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Fixed 2.5V reference-grade LDO powering 16-bit ADCs and op-amp signal chains requiring minimal supply-induced offset drift. Use Value: ±1.4% output accuracy over temperature ensures measurement repeatability; low 100µA IQ enables >100-hour battery life in continuous logging mode. | Use Scenario: Regulating 2.5V for LCD controller, touch-screen interface, and low-power CPU cores in clamshell-form-factor palmtops. IC Role / Device Role / Timing Role: Main system LDO supporting dynamic voltage scaling and rapid wake-from-sleep transitions. Use Value: 300µs shutdown exit delay enables sub-millisecond wake-up; BP-capacitor noise filtering preserves display contrast and touch sensitivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-dropout LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8863EUK25-T | Same 2.5V output, 150mA rating, and SOT23-5 footprint but lacks BP pin and achieves 50µVRMS noise (vs. 30µVRMS). | Not suitable where ultra-low noise is required (e.g., RF bias, high-resolution ADC); acceptable for digital-only rails. | Select MAX8863EUK25-T only if BP-pin noise filtering is unnecessary and cost is prioritized over noise performance. |
| MCP1700T-2502E/MB | 2.5V fixed output, 250mA rating, 125µA IQ, but 170mV dropout at 250mA and no reverse battery protection. | Lacks reverse polarity protection and has higher noise (65µVRMS); suitable for non-battery-reversal environments with higher current needs. | Choose MCP1700T-2502E/MB only when >150mA output is required and reverse battery risk is mitigated externally. |
Compared with MAX8867EUK25-T, MAX8863EUK25-T trades 20µVRMS noise reduction for simplified BP-pin omission, while MCP1700T-2502E/MB offers higher current capacity at the expense of reverse protection and noise performance - making MAX8867EUK25-T optimal for compact, battery-reversal-prone, noise-critical 150mA applications.
Availability
MAX8867EUK25-T is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, and hand-held instruments requiring stable component supply, long-lifecycle support, and guaranteed parametric compliance over industrial temperature range.
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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, communications, and consumer applications.
The MAX8867/MAX8868 product line was engineered specifically for battery-powered portable electronics needing ultra-low noise, low quiescent current, and robust fault protection in minimal SOT23-5 footprint.
FAQ
What is the output voltage tolerance and temperature stability of the MAX8867EUK25-T?
The MAX8867EUK25-T delivers a factory-preset 2.5V output with ±1.4% accuracy over the full -40°C to +85°C operating temperature range. Typical output voltage variation across temperature is ±0.5% (2.4875V to 2.5125V), verified by production testing and statistical correlation. This stability ensures reliable operation for 2.5V logic interfaces and analog reference circuits without external trimming.
Does the MAX8867EUK25-T include auto-discharge functionality during shutdown?
No, the MAX8867EUK25-T does not include auto-discharge functionality. That feature is exclusive to the MAX8868 family (e.g., MAX8868EUK25-T). When the MAX8867EUK25-T is placed in shutdown (SHDN ≤0.4V), the output remains floating at its last regulated voltage; external discharge circuitry is required if active pull-down is needed.
What capacitor values are required for stable operation of the MAX8867EUK25-T?
For stable operation, the MAX8867EUK25-T requires a minimum 1µF X7R or X5R ceramic input capacitor (CIN) and a 1µF–10µF ceramic output capacitor (COUT) with ESR <0.2Ω. A 0.01µF ceramic capacitor must be placed on the BP pin. Using Z5U/Y5V dielectrics may require ≥2.2µF COUT for stability below -10°C; tantalum capacitors need ≥2.2µF to stay within the stable ESR region shown in the datasheet's Region of Stable COUT ESR graph.
How does the MAX8867EUK25-T achieve low dropout voltage, and what is its typical value at light load?
The MAX8867EUK25-T achieves low dropout via an internal P-channel MOSFET pass transistor with 1.1Ω typical RDS(ON). Dropout is calculated as RDS(ON) × ILOAD, yielding 55mV at 50mA and 165mV at 150mA. At light load (1mA), dropout drops to ~10mV - enabling operation with VIN as low as 2.51V while maintaining regulation, critical for end-of-life battery operation.
Is the MAX8867EUK25-T pin-compatible with other Maxim LDOs, and which ones?
Yes, the MAX8867EUK25-T is pin-compatible with the MAX8863 and MAX8864 families in SOT23-5 packages, sharing identical IN, GND, OUT, and SHDN pin assignments. The only difference is the BP pin (pin 5), which is unused (NC) on MAX8863/MAX8864. This allows drop-in replacement in existing layouts when upgrading to lower-noise performance - provided the BP capacitor is added.
MAX8867EUK25-T 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):
- 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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