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Analog Devices Inc./Maxim Integrated MAX8867EUK29
- Part No.:
- MAX8867EUK29
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8867EUK29.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:433
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Product details
Overview
MAX8867EUK29 from Maxim Integrated is a low-noise, low-dropout linear regulator with a factory-preset 2.84V output, 150mA output current capability, 30µVRMS output noise, and 165mV dropout at full load. It uses an internal P-channel MOSFET pass transistor and operates from 2.5V to 6.5V input, targeting power-sensitive portable electronics requiring stable, clean voltage rails.
For engineers reviewing the MAX8867EUK29 datasheet, MAX8867EUK29 pinout, MAX8867EUK29 application, or MAX8867EUK29 equivalent, key selection criteria include its 2.84V fixed output accuracy (±1.4%), 10nA shutdown current, reverse battery protection, thermal shutdown at +155°C, and SOT23-5 package compatibility with MAX8863/MAX8864 footprints.
Technical Context
The MAX8867EUK29 implements a bandgap-referenced error amplifier driving a P-channel MOSFET pass element with 1.1Ω typical RDS(ON), enabling low quiescent current (100µA) independent of load or dropout condition. Its BP pin connects to an internal 200kΩ resistor forming an 80Hz low-pass filter with an external 0.01µF capacitor to suppress reference noise.
It integrates reverse-battery protection limiting reverse current to 1mA, thermal shutdown with 15°C hysteresis, and current limiting set to 160–500mA. Unlike the MAX8868 variant, it lacks auto-discharge functionality - shutdown places the output in high-impedance state without active discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.84V ±1.4% - factory-trimmed for precision; eliminates external feedback resistors and layout sensitivity. |
| Max Output Current | 150mA - supports moderate-power RF modules, baseband ICs, and sensor interfaces without thermal derating in SOT23-5. |
| Dropout Voltage | 165mV at 150mA - enables operation down to 3.005V input when powering 2.84V logic, extending battery life in single-cell Li-ion systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) - achieved with 0.01µF BP capacitor; suitable for noise-sensitive analog circuits like ADC references or VCO supplies. |
| Quiescent Current | 100µA (operating), 10nA (shutdown) - maintains ultra-low standby power in always-on subsystems such as real-time clocks or wake-up controllers. |
| Input Voltage Range | 2.5V to 6.5V - accommodates single-cell Li-ion (2.7–4.2V), LiFePO4 (2.5–3.65V), and dual-cell alkaline (up to 3.2V) without external regulators. |
| Protection Features | Reverse battery protection (≤1mA reverse current), thermal shutdown (+155°C), short-circuit tolerant - enables robust deployment in consumer handhelds with uncontrolled battery insertion. |
Pinout & Package
SOT23-5 regular package (JEDEC MO-178AA); 5-pin surface-mount with GND pin acting as thermal pad - requires soldering to ≥25 mm² copper pour for rated 150mA operation at +85°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable control | Logic-low (≤0.4V) reduces supply current to 10nA; tied to IN for always-on operation; no auto-discharge on MAX8867EUK29. |
| 2 - GND | Power ground and thermal path | Primary return path for load current and heat sink - must connect to large PCB ground plane to maintain thermal performance and stability. |
| 3 - IN | Regulator input | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND near pin to suppress supply ripple and ensure PSRR performance. |
| 4 - OUT | Regulated output | Delivers up to 150mA at 2.84V; requires ≥1µF low-ESR ceramic capacitor to GND for transient response and stability across temperature. |
| 5 - BP | Noise reduction bypass | Connects to internal 200kΩ resistor; 0.01µF ceramic capacitor here reduces output noise by filtering reference voltage fluctuations. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | 1.1Ω typical RDS(ON) enables 100µA quiescent current regardless of load or dropout - critical for long battery life in intermittent-use devices. |
| Factory-trimmed 2.84V output | ±1.4% accuracy over -40°C to +85°C eliminates need for external feedback network and associated layout parasitics or drift errors. |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage during incorrect battery installation in consumer handsets. |
| Thermal shutdown with hysteresis | Triggers at +155°C and re-enables after cooling by 15°C - provides fault recovery without latch-up, supporting reliable operation in sealed enclosures. |
| Low-noise BP pin architecture | Internal 200kΩ resistor + external 0.01µF forms 80Hz LPF on reference node - achieves 30µVRMS noise without complex external filtering. |
Applications
| Cellular Handset Power Rail | PCMCIA Card LDO Supply |
|---|---|
|
Use Scenario: Powering baseband processor I/O banks and RF transceiver bias circuits in GSM/EDGE handsets using single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 2.84V LDO delivering clean, regulated voltage to noise-sensitive analog sections while maintaining tight load regulation under dynamic transmit bursts. Use Value: 30µVRMS noise and 165mV dropout extend usable battery range to 3.005V input, enabling >15% longer talk time versus higher-dropout alternatives. |
Use Scenario: Providing stable 2.84V supply to PCMCIA card controller and interface logic in laptop expansion slots. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating card circuitry from noisy host system rails and suppressing coupling from adjacent high-speed buses. Use Value: Reverse battery protection prevents damage during hot-swap insertion; 10nA shutdown current meets PCMCIA Type II power-off leakage requirements. |
| Palmtop Computer Core Logic | Electronic Planner Display Driver |
|
Use Scenario: Supplying 2.84V to microcontroller core and SRAM in palm-sized PDAs with constrained board area and thermal mass. IC Role / Device Role / Timing Role: Compact, thermally efficient LDO replacing larger packages; GND pin serves as primary heat path to internal ground plane. Use Value: SOT23-5 footprint and 100µA quiescent current support >100-hour standby with integrated RTC, meeting OEM battery-life targets. |
Use Scenario: Powering segment LCD driver ICs and backlight control circuitry in battery-operated electronic organizers. IC Role / Device Role / Timing Role: Low-noise, low-quiescent regulator ensuring stable contrast and flicker-free display operation during variable load conditions. Use Value: 2.84V output matches common LCD bias requirements; 1.4% accuracy avoids display gamma shift across temperature and battery discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8867EUK28 | 2.80V output (40mV lower), otherwise identical electrical specs and pinout. | Used where system logic tolerates 2.80V instead of 2.84V - e.g., certain ARM7-based palmtops with wider VCC tolerance. | Select only if 2.80V meets downstream IC minimum VIH and margin requirements; verify noise and dropout remain sufficient. |
| MAX8867EUK30 | 3.00V output (160mV higher), same package, thermal, and noise performance. | Applicable in systems requiring 3.0V for USB PHY or specific sensor interfaces not compatible with 2.84V. | Choose when downstream load mandates 3.0V nominal; note reduced headroom versus 2.84V version for low-VIN battery operation. |
Compared with MAX8867EUK29, the MAX8867EUK28 offers tighter alignment with legacy 2.8V logic families but sacrifices 40mV margin for battery end-of-life operation, while MAX8867EUK30 improves noise immunity for 3.0V peripherals at the cost of earlier dropout in single-cell Li-ion discharge profiles.
Availability
MAX8867EUK29 is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, palmtop computers, and electronic planners requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for MAX8867EUK29 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 series was developed specifically for battery-powered portable electronics needing ultra-low noise, low dropout, and minimal quiescent current in space-constrained SOT23-5 packaging.
FAQ
What is the exact output voltage of the MAX8867EUK29 and how is it trimmed?
The MAX8867EUK29 delivers a factory-trimmed output voltage of 2.84V with ±1.4% accuracy over the full -40°C to +85°C operating temperature range. This value is laser-trimmed during wafer sort and verified at final test - no external components are required to achieve this precision, eliminating resistor tolerance and temperature drift concerns in the feedback path.
Does the MAX8867EUK29 support auto-discharge during shutdown?
No, the MAX8867EUK29 does not include auto-discharge functionality. When SHDN is pulled low, the device enters 10nA shutdown mode and places the OUT pin in high-impedance state - the output voltage decays only through external load or leakage paths. Auto-discharge is exclusive to the MAX8868 variant (e.g., MAX8868EUK29).
What capacitor values are required for stable operation of the MAX8867EUK29?
For stable operation, the MAX8867EUK29 requires a minimum 1µF ceramic capacitor (X5R/X7R dielectric, <0.2Ω ESR) on the OUT pin and a 1µF ceramic capacitor on the IN pin. A 0.01µF ceramic capacitor must be placed on the BP pin to achieve specified 30µVRMS noise. Larger output capacitance (up to 10µF) improves load-transient response and PSRR.
How does the MAX8867EUK29 handle reverse battery connection?
The MAX8867EUK29 incorporates integrated reverse battery protection that limits reverse current to ≤1mA when either the IN or SHDN pin falls below GND potential. This is achieved by disconnecting internal circuitry and blocking parasitic conduction paths - protecting both the regulator and downstream circuitry without requiring external diodes or FETs.
Is the MAX8867EUK29 pin-compatible with other regulators in the MAX886x family?
Yes, the MAX8867EUK29 is pin-compatible with the MAX8863 and MAX8864 in SOT23-5 packages, except for the BP pin which is unused on those parts. It shares identical IN, GND, OUT, and SHDN pin assignments - enabling drop-in replacement in existing layouts when upgrading to lower noise and improved dropout performance.
MAX8867EUK29 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):
- 2.9V
- 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
MAX8867EUK29 FAQ
1.How can I place an order for MAX8867EUK29 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EUK29 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 MAX8867EUK29 reliable?
The price and inventory of MAX8867EUK29 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EUK29 is usually 5 days.
3.What payment methods are accepted for MAX8867EUK29?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EUK29 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EUK29?
MAX8867EUK29 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EUK29 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 MAX8867EUK29?
For technical support, including MAX8867EUK29 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EUK29 requirements.
6.How does Aetrix verify that MAX8867EUK29 is sourced from the original manufacturer or authorized distributors?
All MAX8867EUK29 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 MAX8867EUK29 meets industry standards.
7.What is the process for return or replacement of MAX8867EUK29?
All MAX8867EUK29 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EUK29, 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 MAX8867EUK29 part is unused and in its original packaging.
Return procedure for MAX8867EUK29:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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