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Analog Devices Inc./Maxim Integrated MAX8867EUK33-T
- Part No.:
- MAX8867EUK33-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8867EUK33-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
MAX8867EUK33-T from Maxim Integrated is a low-noise, low-dropout linear regulator with a preset 3.3V output, 150mA output current capability, 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 battery-powered handheld instruments and PCMCIA cards requiring stable, quiet voltage regulation.
For engineers reviewing the MAX8867EUK33-T datasheet, MAX8867EUK33-T pinout, MAX8867EUK33-T application, or MAX8867EUK33-T equivalent, key selection criteria include output noise performance, shutdown quiescent current (10nA), BP-capacitor–dependent noise filtering, and SOT23-5 thermal design considerations.
Technical Context
The MAX8867EUK33-T implements a fixed-output LDO architecture using a 1.25V bandgap reference, error amplifier, and internal feedback divider to maintain regulated 3.3V output. Its P-channel MOSFET pass element enables ultra-low quiescent current (100µA) across all operating conditions including dropout, eliminating base-drive losses inherent in PNP-based regulators.
It integrates reverse-battery protection that limits reverse current to 1mA when VIN or SHDN falls below ground, plus thermal shutdown at +155°C with 15°C hysteresis. The BP pin connects to an internal 200kΩ resistor forming an 80Hz low-pass filter with an external 0.01µF capacitor to reduce output noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1.4% - factory-trimmed for precision without external resistors. |
| Max Output Current | 150mA - supports moderate-power analog/digital loads in portable systems. |
| Dropout Voltage | 165mV at 150mA - enables operation down to ~3.465V input for 3.3V rail in fading battery scenarios. |
| Output Noise | 30µVRMS (10Hz–100kHz) - low enough for RF front-ends and precision ADC references. |
| Quiescent Current | 100µA (operating), 10nA (shutdown) - extends battery life in always-on or sleep-mode applications. |
| Input Voltage Range | 2.5V to 6.5V - compatible with single Li-ion, dual alkaline, or regulated intermediate rails. |
| Thermal Shutdown | Triggers at +155°C with +15°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
SOT23-5 regular package (5-pin, 1.6mm × 2.9mm × 1.1mm body height), GND pin serves as primary thermal path - requires soldering to large copper area or ground plane for power dissipation up to 571mW at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable control | Pulls device into 10nA shutdown; on MAX8868 only, initiates active output discharge - not used for MAX8867EUK33-T auto-discharge. |
| 2 - GND | Power ground and thermal sink | Electrical return path and primary heat conduction route - must connect to ≥100mm² copper for thermal reliability. |
| 3 - IN | Regulator input supply | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor close to pin for stability and line-transient suppression. |
| 4 - OUT | Regulated output | Delivers up to 150mA at 3.3V; requires ≥1µF low-ESR capacitor (X7R/X5R ceramic preferred) for load-transient response. |
| 5 - BP | Noise-reduction bypass node | Connects to internal 200kΩ resistor; 0.01µF ceramic capacitor reduces output noise to 30µVRMS - larger values increase startup time. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 30µVRMS output noise with 0.01µF BP cap - enables clean power for sensitive analog circuits without additional filtering. |
| P-channel MOSFET pass element | 1.1Ω typical RDS(ON) - eliminates base-drive current loss, sustaining 100µA IQ across all load and dropout conditions. |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN < 0V - prevents damage during incorrect battery insertion in consumer devices. |
| Thermal and short-circuit protection | Auto-shutdown at +155°C junction temp and indefinite short-to-ground tolerance - ensures robustness in unattended operation. |
| Preset 3.3V output accuracy | ±1.4% over -40°C to +85°C - eliminates external resistor network, reducing BOM count and layout area in space-constrained designs. |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
Use Scenario: Portable multimeters and data loggers powered by two AA/AAA cells with variable voltage decay. IC Role / Device Role / Timing Role: Primary 3.3V system rail regulator maintaining stable logic and ADC reference despite input sag from 3.0V to 2.5V. Use Value: 165mV dropout allows >20% longer runtime before brownout versus higher-dropout alternatives; 30µVRMS noise avoids ADC quantization errors. | Use Scenario: Hot-pluggable PCMCIA memory or modem cards requiring immediate, glitch-free 3.3V power on insertion. IC Role / Device Role / Timing Role: Local LDO supplying 3.3V I/O and core logic, rejecting noise from host bus switching transients. Use Value: 63dB PSRR at low frequencies suppresses host-side supply ripple; 100µA IQ minimizes standby drain during card idle states. |
| Palmtop Computers | Cordless Telephones |
Use Scenario: Compact PDAs with integrated LCD, flash memory, and IR transceivers drawing bursty 3.3V loads. IC Role / Device Role / Timing Role: Main 3.3V supply delivering up to 150mA during CPU wake cycles while maintaining low noise for display driver ICs. Use Value: Fast load-transient response (12mV overshoot for 0→50mA step) prevents display flicker; BP pin filtering cleans VDD for analog audio codecs. | Use Scenario: DECT cordless handsets using single Li-ion cell with dynamic transmit/receive current profiles. IC Role / Device Role / Timing Role: Regulating 3.3V for RF synthesizer, DSP, and keypad controller under pulsed 100mA transmit loads. Use Value: Reverse battery protection safeguards against user-insertion errors; 10nA shutdown current preserves battery charge during extended standby. |
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 |
|---|---|---|---|
| TPS76333DBVR | Higher 250mV dropout at 150mA; 50µVRMS noise; no BP pin for noise tuning. | Less suitable for deep-battery-discharge operation or ultra-low-noise analog rails. | Choose if footprint compatibility with TI's SOT23-5 is required and noise/dropout margins allow. |
| MCP1700T-3302E/MB | 150mV dropout at 250mA; 30µVRMS noise; no reverse-battery protection; 1.6µA IQ (no shutdown). | Lacks active shutdown and reverse-polarity safety - unsuitable for consumer handhelds with user-replaceable batteries. | Prefer where lowest possible quiescent current in active mode is critical and reverse protection is handled externally. |
Compared with TPS76333DBVR and MCP1700T-3302E/MB, the MAX8867EUK33-T delivers superior dropout performance at full load, integrated reverse-battery protection, and a dedicated BP pin enabling optimized noise filtering - making it uniquely suited for compact, battery-powered instruments demanding both safety and signal integrity.
Availability
MAX8867EUK33-T is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, palmtop computers, and cordless telephones requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX8867EUK33-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 ICs for power, interface, sensing, and RF applications.
The MAX8867/MAX8868 product line targets battery-powered portable electronics, emphasizing ultra-low noise, minimal quiescent current, and robust fault protection in miniature SOT23 packages.
FAQ
What is the output voltage tolerance of the MAX8867EUK33-T over temperature and load?
The MAX8867EUK33-T provides a factory-preset 3.3V output with ±1.4% accuracy over the full -40°C to +85°C operating temperature range and 0mA to 150mA load current. This specification is production-tested and guaranteed via statistical correlation, ensuring consistent regulation without external trimming components in the final design.
Does the MAX8867EUK33-T include auto-discharge functionality during shutdown?
No, the MAX8867EUK33-T does not include auto-discharge. That feature is exclusive to the MAX8868 variant. When the MAX8867EUK33-T is placed in shutdown (SHDN = low), the output remains floating at its last regulated voltage; external circuitry is required to actively discharge the output if needed.
What capacitor values are recommended for stable operation of the MAX8867EUK33-T?
For stable operation, use a minimum 1µF X7R or X5R ceramic capacitor on the IN pin and a 1µF to 10µF low-ESR ceramic capacitor on the OUT pin. A 0.01µF ceramic capacitor is mandatory on the BP pin to achieve the specified 30µVRMS output noise. Avoid Z5U/Y5V dielectrics below -10°C unless capacitance is increased to ≥2.2µF.
How does the MAX8867EUK33-T handle reverse battery connection?
The MAX8867EUK33-T incorporates integrated reverse battery protection that limits reverse current to ≤1mA when either the IN or SHDN pin falls below ground potential. This is achieved by disconnecting internal circuitry and parasitic paths, preventing damage during incorrect battery installation in consumer handheld devices.
What is the thermal resistance and maximum power dissipation of the MAX8867EUK33-T in its SOT23-5 package?
In the SOT23-5 regular package, the MAX8867EUK33-T has a junction-to-board thermal resistance (θJB) of 140°C/W. At +70°C ambient, its continuous power dissipation is rated at 571mW, derating by 7.1mW/°C above that temperature. Effective thermal performance requires soldering the GND pin to a ≥100mm² copper area to meet this rating.
MAX8867EUK33-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):
- 3.3V
- 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
MAX8867EUK33-T FAQ
1.How can I place an order for MAX8867EUK33-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EUK33-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 MAX8867EUK33-T reliable?
The price and inventory of MAX8867EUK33-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EUK33-T is usually 5 days.
3.What payment methods are accepted for MAX8867EUK33-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EUK33-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EUK33-T?
MAX8867EUK33-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EUK33-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 MAX8867EUK33-T?
For technical support, including MAX8867EUK33-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EUK33-T requirements.
6.How does Aetrix verify that MAX8867EUK33-T is sourced from the original manufacturer or authorized distributors?
All MAX8867EUK33-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 MAX8867EUK33-T meets industry standards.
7.What is the process for return or replacement of MAX8867EUK33-T?
All MAX8867EUK33-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EUK33-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 MAX8867EUK33-T part is unused and in its original packaging.
Return procedure for MAX8867EUK33-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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