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Analog Devices Inc./Maxim Integrated MAX8867EUK29+T
- Part No.:
- MAX8867EUK29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8867EUK29+T.pdf
- Description:
- IC REG LIN 2.84V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,298
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Product details
Overview
MAX8867EUK29+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 2.84V preset output voltage, 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 battery-powered portable electronics requiring stable, ultra-low-noise power for RF or precision analog circuitry.
For engineers reviewing the MAX8867EUK29+T datasheet, MAX8867EUK29+T pinout, MAX8867EUK29+T application, or MAX8867EUK29+T 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+T implements a bandgap-referenced error amplifier driving a P-channel MOSFET pass element with 1.1Ω typical RDS(ON). 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 that limits reverse current to 1mA when VIN or SHDN falls below GND, plus thermal shutdown with 15°C hysteresis and current limiting set to 160–500mA. Unlike the MAX8868 variant, it lacks auto-discharge functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.84V ±1.4% - factory-preset, no external resistors required |
| Max Output Current | 150mA - supports moderate-power RF ICs or microcontrollers |
| Dropout Voltage | 165mV at 150mA - enables operation down to ~2.68V input with 2.84V output |
| Output Noise | 30µVRMS (10Hz–100kHz) - suitable for noise-sensitive ADCs or VCOs |
| Quiescent Current | 100µA - constant across load and dropout, enabling long battery life |
| Shutdown Current | 10nA - enables deep-sleep modes in portable devices |
| Input Voltage Range | 2.5V to 6.5V - compatible with single Li-ion, dual Alkaline, or regulated 3.3/5V rails |
Pinout & Package
SOT23-5 regular package (JEDEC MO-178AA), 5-pin surface-mount with exposed pad not electrically connected; GND pin serves as primary thermal path and must be soldered to large copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable control | Logic low disables regulator and reduces supply current to 10nA; connect to IN for always-on operation |
| 2 - GND | Power ground and thermal sink | Electrical return path and primary heat dissipation route; requires PCB copper pour for thermal management |
| 3 - IN | Input voltage supply | Accepts 2.5V–6.5V; bypass with ≥1µF ceramic capacitor close to pin |
| 4 - OUT | Regulated output | Delivers up to 150mA at 2.84V; requires ≥1µF low-ESR output capacitor for stability |
| 5 - BP | Noise-reduction bypass | Connects to internal 200kΩ resistor; 0.01µF ceramic capacitor reduces output noise by filtering reference noise |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 30µVRMS output noise with 0.01µF BP cap - preserves SNR in RF front-ends and precision sensors |
| P-channel MOSFET pass device | 1.1Ω RDS(ON), zero base-drive current - eliminates quiescent current increase in dropout |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN < GND - prevents damage during battery insertion errors |
| Thermal shutdown with hysteresis | Triggers at +155°C, re-enables after cooling by 15°C - provides fault-safe operation without latch-up |
| Preset output voltage | 2.84V trimmed at wafer test - eliminates external feedback resistors and layout sensitivity |
Applications
| Cellular Handset RF Power Amplifier Supply | Portable Medical Sensor Front-End |
|---|---|
Use Scenario: Powers RF power amplifier bias rail in GSM/EDGE handsets where supply noise directly impacts adjacent-channel leakage ratio (ACLR). IC Role / Device Role / Timing Role: Low-noise, fixed 2.84V LDO supplying PA collector voltage with minimal spectral contamination. Use Value: 30µVRMS noise and 63dB PSRR at 1kHz ensure ACLR remains within 3GPP spec under dynamic transmit conditions. | Use Scenario: Supplies analog front-end of handheld ECG or pulse oximeter where baseline drift degrades diagnostic accuracy. IC Role / Device Role / Timing Role: Stable 2.84V rail for instrumentation amplifier and 24-bit delta-sigma ADC reference buffer. Use Value: ±1.4% output accuracy and low load/line regulation (<0.04%/mA, <0.15%/V) maintain signal chain gain integrity across battery discharge. |
| PCMCIA Card 3.3V Logic Interface | Palmtop Computer Real-Time Clock Backup |
Use Scenario: Generates clean 2.84V logic supply for PCMCIA card controller ICs operating from variable host bus voltage. IC Role / Device Role / Timing Role: Input-voltage-flexible LDO translating noisy 3.3V host rail into low-noise local logic supply. Use Value: 2.5V–6.5V input range accommodates undershoot/overshoot on hot-plugged PCMCIA slots; 100µA quiescent current minimizes standby drain. | Use Scenario: Provides always-on 2.84V supply to RTC and SRAM in palmtop computers during main system shutdown. IC Role / Device Role / Timing Role: Ultra-low-quiescent LDO maintaining timekeeping function from coin-cell or backup battery. Use Value: 10nA shutdown current extends 3V coin-cell life beyond 10 years; reverse battery protection safeguards against accidental polarity reversal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8867EUK30+T | 3.00V preset output (vs. 2.84V); identical noise, dropout, and package | Requires system-level voltage margin check for 3.00V vs. 2.84V load tolerance | Select only if target load accepts 3.00V nominal; no PCB change needed |
| MCP1702T-2802E/MB | 2.8V output (±2%), 150mA, 120mV dropout at 150mA, but 55µVRMS noise and no reverse-battery protection | Lacks reverse-battery protection and higher noise limit suitability for RF/analog | Use where cost sensitivity outweighs noise and protection requirements; verify thermal design due to higher dropout |
Compared with MAX8867EUK30+T, the MAX8867EUK29+T offers tighter 2.84V output matching for legacy 2.8V logic rails; compared with MCP1702T-2802E/MB, it delivers 45% lower output noise and integrated reverse-battery protection critical for consumer handheld reliability.
Availability
MAX8867EUK29+T is available at Aetrix Electronics and suitable for cellular telephones, handheld medical instruments, PCMCIA cards, and palmtop computers requiring stable component supply with guaranteed long-term continuity.
Supply support for MAX8867EUK29+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 and mixed-signal semiconductor solutions for power, interface, sensing, and timing applications.
The MAX8867/MAX8868 product line targets battery-powered portable electronics needing ultra-low-noise, low-quiescent-current regulation with robust protection features in space-constrained SOT23 packages.
FAQ
What is the exact output voltage tolerance of the MAX8867EUK29+T?
The MAX8867EUK29+T has a factory-trimmed output voltage of 2.84V with ±1.4% accuracy over the full -40°C to +85°C temperature range and load conditions. This specification is 100% production tested at +25°C and guaranteed across temperature via statistical correlation methods per the datasheet.
Does the MAX8867EUK29+T include auto-discharge functionality?
No, the MAX8867EUK29+T does not include auto-discharge. That feature is exclusive to the MAX8868 family variants. When the MAX8867EUK29+T is placed in shutdown (SHDN = low), the output remains floating at its last regulated voltage; it does not actively discharge to ground.
What capacitor values are required for stable operation of the MAX8867EUK29+T?
The MAX8867EUK29+T requires a minimum 1µF ceramic input capacitor (X5R/X7R dielectric) and a 1µF–10µF output capacitor with ≤0.2Ω ESR. A 0.01µF ceramic capacitor must be placed on the BP pin. For full-temperature stability with 150mA loads, 1µF X7R is sufficient; Z5U/Y5V types require ≥2.2µF below -10°C.
How does reverse battery protection work in the MAX8867EUK29+T?
The MAX8867EUK29+T monitors VIN and SHDN pins relative to GND. If either falls below GND, internal circuitry disconnects parasitic paths and limits reverse current to ≤1mA - preventing damage during incorrect battery installation. This protection is active regardless of enable state and requires no external components.
Is the MAX8867EUK29+T pin-compatible with other SOT23-5 LDOs?
The MAX8867EUK29+T is pin-compatible with MAX8863/MAX8864 in SOT23-5, differing only in BP pin functionality. It is not pin-compatible with generic SOT23-5 LDOs due to unique BP pin assignment and internal feedback topology - direct replacement requires verification of BP usage and shutdown behavior in the target design.
MAX8867EUK29+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):
- 2.9V
- 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+T FAQ
1.How can I place an order for MAX8867EUK29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EUK29+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 MAX8867EUK29+T reliable?
The price and inventory of MAX8867EUK29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EUK29+T is usually 5 days.
3.What payment methods are accepted for MAX8867EUK29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EUK29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EUK29+T?
MAX8867EUK29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EUK29+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 MAX8867EUK29+T?
For technical support, including MAX8867EUK29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EUK29+T requirements.
6.How does Aetrix verify that MAX8867EUK29+T is sourced from the original manufacturer or authorized distributors?
All MAX8867EUK29+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 MAX8867EUK29+T meets industry standards.
7.What is the process for return or replacement of MAX8867EUK29+T?
All MAX8867EUK29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EUK29+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 MAX8867EUK29+T part is unused and in its original packaging.
Return procedure for MAX8867EUK29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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