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Analog Devices Inc./Maxim Integrated MAX8868EUK33+T
- Part No.:
- MAX8868EUK33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8868EUK33+T.pdf
- Description:
- IC REG LINEAR 3.3V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,869
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Product details
Overview
MAX8868EUK33+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 3.3V preset output, 150mA maximum output current, 30µVRMS output noise, and 165mV dropout at full load - designed for battery-powered portable electronics requiring stable, clean power under light-to-moderate load.
For engineers reviewing the MAX8868EUK33+T datasheet, MAX8868EUK33+T pinout, MAX8868EUK33+T application, or MAX8868EUK33+T equivalent, key selection criteria include auto-discharge capability, 10nA shutdown current, reverse battery protection, thermal shutdown at +155°C, and SOT23-5 package compatibility with PCB space-constrained handheld designs.
Technical Context
The MAX8868EUK33+T 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 LDOs. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.
Unlike the MAX8867, the MAX8868EUK33+T integrates an active auto-discharge circuit that pulls the output to GND during shutdown via a dedicated discharge path - enabled only when SHDN is logic-low. The BP pin connects to an internal 200kΩ resistor forming an 80Hz low-pass filter with a 0.01µF external capacitor to suppress reference noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±1.4% - factory-preset, no external resistors required; supports precise rail generation for 3.3V logic and RF subsystems. |
| Max Output Current | 150mA - sufficient for baseband processors, RF front-ends, and sensor interfaces in compact portable devices. |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 3.465V, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) - achieved with 0.01µF BP capacitor; critical for noise-sensitive analog/RF circuits. |
| Shutdown Current | 10nA - reduces standby power loss in always-on subsystems like real-time clocks or wake-up controllers. |
| Thermal Shutdown | +155°C with +15°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-off. |
| Reverse Battery Protection | Limits reverse current to ≤1mA if VIN or SHDN falls below GND - prevents damage during battery insertion errors. |
Pinout & Package
SOT23-5 regular package (5-pin, 1.6mm × 2.9mm × 1.1mm), thermally enhanced with GND pin serving as primary heatsink - requires soldering to large copper area or ground plane for rated power dissipation (571mW at +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable/discharge control | Logic-low (≤0.4V) disables regulator and activates auto-discharge on MAX8868EUK33+T; connect to IN for always-on operation. |
| 2 - GND | Power ground and thermal path | Electrical return and primary heat conduction path - must be connected to ≥100mm² copper area for thermal reliability. |
| 3 - IN | Input voltage supply | Accepts 2.5V–6.5V; requires 1µF ceramic bypass to GND near pin for stability and line-transient suppression. |
| 4 - OUT | Regulated output | Delivers 3.3V up to 150mA; requires 1–10µF low-ESR ceramic capacitor to GND for load-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 voltage ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Actively sinks OUT to GND during shutdown - eliminates residual voltage that could cause leakage or unintended wake-up in downstream circuitry. |
| P-channel MOSFET pass element | 1.1Ω typical RDS(ON) - enables constant 100µA quiescent current regardless of load or dropout, maximizing battery runtime. |
| Reverse battery protection | Blocks >99.9% reverse current (<1mA) when VIN or SHDN < GND - removes need for external series diode and its associated voltage drop. |
| Thermal-overload protection | Hysteretic shutdown at +155°C (+15°C hysteresis) - allows safe intermittent operation under overload without permanent disable. |
| Low-noise BP filtering | 80Hz RC filter (200kΩ + 0.01µF) on internal reference - reduces output noise floor to 30µVRMS without external op-amps or filters. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering RF transceiver ICs and baseband processors in GSM/EDGE handsets with single-cell Li-ion battery (2.7–4.2V). IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying noise-critical analog sections and digital I/O rails. Use Value: 30µVRMS noise and 165mV dropout extend talk time and maintain EVM performance across battery discharge curve. |
Use Scenario: Providing regulated 3.3V to memory, controller, and interface logic in hot-pluggable PCMCIA Type II cards. IC Role / Device Role / Timing Role: Standby-power LDO with 10nA shutdown current enabling instant card detection and low-leakage sleep mode. Use Value: Reverse battery protection prevents damage during misinsertion; auto-discharge ensures clean reset on card removal. |
| Palmtop Computers | Electronic Planners |
|
Use Scenario: Supplying core logic and display driver ICs in ARM-based palmtops with tight board area and thermal constraints. IC Role / Device Role / Timing Role: Compact-area 3.3V regulator with GND-as-heatsink design minimizing need for thermal vias or heatsinks. Use Value: SOT23-5 footprint and 571mW power dissipation rating support high-density layouts without derating penalties. |
Use Scenario: Delivering stable 3.3V to microcontroller, LCD, and EEPROM in battery-operated electronic organizers. IC Role / Device Role / Timing Role: Low-quiescent-current LDO maintaining system functionality during multi-week standby on coin-cell batteries. Use Value: 100µA operating IQ and 10nA shutdown current maximize shelf life and reduce battery replacement frequency. |
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 |
|---|---|---|---|
| MAX8867EUK33+T | No auto-discharge; identical pinout, specs, and package - differs only in missing discharge FET and related control logic. | Suitable where output hold-up during shutdown is acceptable or desired (e.g., non-volatile state retention). | Select MAX8867EUK33+T only if auto-discharge is unnecessary and cost minimization is prioritized. |
| MCP1700T-3302E/TT | 250mA max output, 175mV dropout at 250mA, 30µVRMS noise, but no reverse battery protection or BP noise filter. | Requires external reverse-polarity protection; lacks auto-discharge and BP-based noise optimization for RF/analog use. | Choose MCP1700T-3302E/TT only for higher-current, non-battery-reverse-risk applications where BP filtering is not required. |
Compared with MAX8867EUK33+T, the MAX8868EUK33+T adds auto-discharge without sacrificing noise, dropout, or quiescent current - making it superior for systems requiring clean shutdown. Versus MCP1700T-3302E/TT, it delivers integrated reverse protection and lower-system-component-count noise reduction, albeit at slightly higher cost and lower max current.
Availability
MAX8868EUK33+T is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, palmtop computers, and electronic planners requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for MAX8868EUK33+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) 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 ultra-low-noise, low-quiescent-current regulation in space-constrained, battery-powered portable electronics - emphasizing dropout efficiency, shutdown integrity, and integrated protection.
FAQ
What is the exact output voltage tolerance of the MAX8868EUK33+T?
The MAX8868EUK33+T has a factory-trimmed output voltage of 3.3V with ±1.4% accuracy over the full temperature range (-40°C to +85°C) and line/load conditions. This specification is 100% production tested at +25°C and guaranteed across temperature using Statistical Quality Control methods - ensuring reliable 3.3V rail generation without external trimming components.
Does the MAX8868EUK33+T require an external BP capacitor for basic operation?
Yes, the MAX8868EUK33+T requires a 0.01µF ceramic capacitor between BP and GND for specified 30µVRMS output noise performance. Omitting it increases noise significantly; using >0.1µF extends startup time without improving noise - so 0.01µF is the optimal value for both noise and responsiveness in the MAX8868EUK33+T.
How does the auto-discharge function work in the MAX8868EUK33+T?
When SHDN is pulled low, the MAX8868EUK33+T activates an internal NMOS discharge switch between OUT and GND, sinking current until VOUT reaches ~0V. This occurs independently of load capacitance and is confirmed in the shutdown exit delay characterization - a feature absent in the pin-compatible MAX8867EUK33+T.
Can the MAX8868EUK33+T operate with input voltages below 2.5V?
No - the MAX8868EUK33+T has an absolute minimum input voltage of 2.5V per Absolute Maximum Ratings. Operation below this violates specifications and may result in unregulated output or undefined behavior. Its 165mV dropout means minimum functional VIN is 3.465V at full 150mA load for 3.3V output.
Is the MAX8868EUK33+T compatible with standard SOT23-5 footprints and reflow profiles?
Yes, the MAX8868EUK33+T uses the industry-standard SOT23-5 regular package (JEDEC MO-178AA) with 1.27mm pitch and lead finish compatible with SnPb and Pb-free reflow. Its thermal characteristics (θJB = 140°C/W) are validated for standard PCB layouts with GND pad thermal connection - no special assembly requirements beyond IPC-J-STD-020 compliance.
MAX8868EUK33+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
MAX8868EUK33+T FAQ
1.How can I place an order for MAX8868EUK33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8868EUK33+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 MAX8868EUK33+T reliable?
The price and inventory of MAX8868EUK33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8868EUK33+T is usually 5 days.
3.What payment methods are accepted for MAX8868EUK33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8868EUK33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8868EUK33+T?
MAX8868EUK33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8868EUK33+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 MAX8868EUK33+T?
For technical support, including MAX8868EUK33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8868EUK33+T requirements.
6.How does Aetrix verify that MAX8868EUK33+T is sourced from the original manufacturer or authorized distributors?
All MAX8868EUK33+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 MAX8868EUK33+T meets industry standards.
7.What is the process for return or replacement of MAX8868EUK33+T?
All MAX8868EUK33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8868EUK33+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 MAX8868EUK33+T part is unused and in its original packaging.
Return procedure for MAX8868EUK33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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