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Analog Devices Inc./Maxim Integrated MAX8867EUK40+
- Part No.:
- MAX8867EUK40+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8867EUK40+.pdf
- Description:
- IC REG LINEAR LOW NOISE LDO
- Quantity:
- Payment:
- Shipping:
Inventory:31,352
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Product details
Overview
MAX8867EUK40+ from Maxim Integrated is a low-noise, low-dropout linear regulator with 4.0V preset output, 150mA output current capability, 30µVRMS output noise, and 165mV dropout at full load - designed for battery-powered portable electronics requiring stable, clean power under tight space constraints.
For engineers reviewing the MAX8867EUK40+ datasheet, MAX8867EUK40+ pinout, MAX8867EUK40+ application, or MAX8867EUK40+ equivalent, key selection criteria include output voltage accuracy (±1.4%), shutdown current (10nA), thermal protection threshold (+155°C), reverse battery protection, and SOT23-5 thin-package compatibility with PCB area-sensitive designs.
Technical Context
The MAX8867EUK40+ uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve ultra-low quiescent current (100µA across all load and dropout conditions) and eliminate base-drive losses inherent in PNP-based regulators. 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 with external 0.01µF capacitor forming an 80Hz low-pass filter; PSRR reaches 63dB at low frequencies but rolls off above 10kHz. 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 GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.0V ±1.4% - factory-preset, eliminates external feedback resistors and reduces BOM count. |
| Max Output Current | 150mA - supports moderate-power analog/digital loads like RF front-ends or microcontroller peripherals. |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 4.165V, extending usable battery life in 4.2V Li-ion systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) - suitable for noise-sensitive analog circuits including ADC references and RF synthesizers. |
| Quiescent Current | 100µA (operating), 10nA (shutdown) - minimizes standby drain in always-on portable devices. |
| Input Voltage Range | 2.5V to 6.5V - compatible with single-cell Li-ion, Li-poly, NiMH, and regulated 3.3V/5V rails. |
| Protection Features | Thermal shutdown (+155°C), short-circuit limit (≥160mA), reverse battery protection (≤1mA reverse current) - ensures robust field reliability without external circuitry. |
Pinout & Package
SOT23-5 thin package (2.9mm × 1.6mm × 1.1mm height), thermally enhanced with GND pin serving as heatsink - requires soldering to large copper pour or ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable input | Logic low disables regulator and reduces supply current to 10nA; no auto-discharge (distinguishes MAX8867 from MAX8868). |
| 2 - GND | Power ground & thermal path | Reference node for all internal circuitry; primary heat conduction path - must connect to ≥100mm² copper area. |
| 3 - IN | Input voltage supply | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass capacitor (low-ESR) close to pin for stability and line transient suppression. |
| 4 - OUT | Regulated output | Delivers up to 150mA at 4.0V; requires 1µF–10µF output capacitor (X7R/X5R preferred) for load transient response and stability. |
| 5 - BP | Noise-reduction bypass | Connects to 0.01µF ceramic capacitor to reduce output noise; forms 80Hz RC filter with internal 200kΩ resistor. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss - maintains 100µA IQ regardless of load or dropout condition, unlike PNP-based LDOs. |
| Dedicated BP pin with RC filtering | Enables 30µVRMS noise with only 0.01µF external cap - avoids costly multi-stage filtering in space-constrained layouts. |
| Reverse battery protection | Blocks >99.9% of reverse current (<1mA) when VIN or SHDN goes negative - prevents damage during battery insertion errors. |
| Thermal shutdown with hysteresis | Shuts down at +155°C and re-enables at +140°C - prevents latch-up during intermittent overloads while protecting silicon integrity. |
| Preset 4.0V output | ±1.4% initial accuracy over temperature - removes need for external feedback network, saving PCB area and calibration effort. |
Applications
| Cellular Handset Power Rail | PCMCIA Card Bias Supply |
|---|---|
Use Scenario: Powers RF transceiver ICs and baseband processors in dual-mode GSM/CDMA handsets where battery voltage drops from 4.2V to 3.4V during discharge. IC Role / Device Role / Timing Role: Primary 4.0V LDO delivering clean, low-noise bias to sensitive analog sections while maintaining regulation through end-of-life battery voltage. Use Value: 165mV dropout extends usable runtime by ~12 minutes vs. higher-dropout alternatives; 30µVRMS noise prevents phase noise degradation in VCOs. | Use Scenario: Supplies regulated 4.0V to memory and interface logic on hot-pluggable PCMCIA cards operating from variable host bus voltages. IC Role / Device Role / Timing Role: Isolated local regulator decoupling card from noisy host 5V rail - provides independent, stable voltage domain during insertion/removal events. Use Value: Reverse battery protection prevents latch-up if card is inserted backward; 10nA shutdown current meets PCMCIA Type II suspend-mode leakage requirements. |
| Palmtop Computer Core Logic | Electronic Planner Audio Codec |
Use Scenario: Powers ARM7-based application processor core and SRAM in palm-sized PDAs with tight thermal budgets and limited board area. IC Role / Device Role / Timing Role: Low-quiescent-current LDO supplying 4.0V to processor I/O and memory interfaces - active during both run and standby states. Use Value: 100µA operating IQ minimizes idle power draw; SOT23-5 thin package fits within 3mm board edge clearance constraints. | Use Scenario: Provides low-noise 4.0V supply to stereo audio DAC and headphone amplifier in voice-enabled organizers. IC Role / Device Role / Timing Role: Clean analog power source isolated from digital switching noise - critical for achieving >90dB SNR in audio signal chain. Use Value: BP-pin filtering achieves 30µVRMS noise floor - directly enables 16-bit audio resolution without additional ferrite beads or LC filters. |
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 |
|---|---|---|---|
| TPS76340DBVR | Higher 220mV dropout at 150mA; 50µVRMS noise; no BP pin or reverse battery protection | Lacks reverse polarity protection and noise optimization - requires external filtering for audio-grade performance | Choose only if footprint compatibility is mandatory and system lacks reverse-battery risk |
| MCP1703T-4002E/MB | 1.8µA typical IQ (no shutdown); 175mV dropout; ±2% output accuracy; no thermal shutdown | Higher output tolerance and missing thermal protection limit use in thermally unmanaged enclosures | Select when ultra-low IQ dominates design priority and thermal environment is controlled |
Compared with TPS76340DBVR and MCP1703T-4002E/MB, the MAX8867EUK40+ uniquely combines 10nA shutdown, reverse battery protection, and BP-pin noise filtering - making it the only option among the three qualified for handheld devices subject to battery reversal and demanding analog noise specs.
Availability
MAX8867EUK40+ is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, palmtop computers, and electronic planners requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for MAX8867EUK40+ 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 U.S.-based 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 engineered specifically for battery-powered portable electronics - prioritizing ultra-low noise, minimal quiescent current, and robust fault protection in miniature SOT23 packages.
FAQ
What is the exact output voltage tolerance and temperature drift of the MAX8867EUK40+?
The MAX8867EUK40+ has a factory-trimmed output voltage of 4.0V with ±1.4% initial accuracy over -40°C to +85°C. Over temperature, typical drift is ±0.02%/°C - measured as <±0.5% total variation across the full operating range per the datasheet's Output Voltage vs. Temperature curves (Fig. MAX8867/8-07 and MAX8867/8-08). This performance is confirmed for the MAX8867EUK40+ variant using its specific SOT23-5 thin-package characterization data.
Does the MAX8867EUK40+ include auto-discharge functionality during shutdown?
No, the MAX8867EUK40+ does not include auto-discharge. That feature is exclusive to the MAX8868 family (e.g., MAX8868EUK40+). When the MAX8867EUK40+ is placed in shutdown (SHDN = low), the output remains floating at its last regulated voltage - no active discharge path to GND is provided internally. Designers requiring fast output discharge must add an external NMOS switch or bleed resistor.
What capacitor values and dielectrics are recommended for stable operation of the MAX8867EUK40+?
For stable operation, use a 1µF X7R or X5R ceramic capacitor on IN and 1µF–10µF on OUT (X7R/X5R preferred). Avoid Z5U/Y5V due to capacitance loss at low temperature - 2.2µF minimum required if using those dielectrics below -10°C. The BP pin requires exactly 0.01µF ceramic (C0G/NP0 recommended); values >0.1µF increase startup time without improving noise.
Can the MAX8867EUK40+ operate from a 3.3V input supply?
Yes, the MAX8867EUK40+ can operate from a 3.3V input, but only with reduced headroom: dropout is 165mV at 150mA, so minimum functional input is 4.165V. At 3.3V input, the device enters dropout and cannot regulate 4.0V - output will follow input minus dropout voltage (e.g., ~3.135V at 150mA). It remains functional as a pass element but loses regulation. For 3.3V input, select a 3.3V-output variant like MAX8867EUK33+.
Is the MAX8867EUK40+ pin-compatible with the MAX8863 series?
Yes, the MAX8867EUK40+ is pin-compatible with the MAX8863 series except for the BP pin (pin 5). The MAX8863 lacks the BP pin and associated noise-reduction circuitry - its pin 5 is NC. When replacing MAX8863 with MAX8867EUK40+, leave pin 5 unconnected or tie to GND (no harm); omitting the 0.01µF BP capacitor forfeits the 30µVRMS noise benefit but preserves basic regulation functionality.
MAX8867EUK40+ 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):
- 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+ FAQ
1.How can I place an order for MAX8867EUK40+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EUK40+ 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+ reliable?
The price and inventory of MAX8867EUK40+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EUK40+ is usually 5 days.
3.What payment methods are accepted for MAX8867EUK40+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EUK40+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EUK40+?
MAX8867EUK40+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EUK40+ 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+?
For technical support, including MAX8867EUK40+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EUK40+ requirements.
6.How does Aetrix verify that MAX8867EUK40+ is sourced from the original manufacturer or authorized distributors?
All MAX8867EUK40+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX8867EUK40+?
All MAX8867EUK40+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EUK40+, 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+ part is unused and in its original packaging.
Return procedure for MAX8867EUK40+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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