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Analog Devices Inc./Maxim Integrated MAX8868EUK30
- Part No.:
- MAX8868EUK30
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8868EUK30.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:451
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Product details
Overview
MAX8868EUK30 from Maxim Integrated is a low-noise, low-dropout linear regulator with a factory-preset 3.0V output, 150mA output current capability, 30µVRMS output noise, and 165mV dropout at full load. It features an internal P-channel MOSFET pass transistor, 10nA logic-controlled shutdown, and auto-discharge functionality - designed for battery-powered portable electronics requiring stable, clean power under light-to-moderate load.
For engineers reviewing the MAX8868EUK30 datasheet, MAX8868EUK30 pinout, MAX8868EUK30 application, or MAX8868EUK30 equivalent, this page delivers verified technical context, exact pin functions, real-world application mapping, and validated alternative options for portable power management design and BOM optimization.
Technical Context
The MAX8868EUK30 implements a bandgap-referenced error amplifier driving a P-channel MOSFET pass element with 1.1Ω typical RDS(ON), enabling ultra-low quiescent current (100µA) independent of load or dropout condition. Its BP pin integrates a 200kΩ resistor to form an 80Hz low-pass filter with an external 0.01µF capacitor, directly reducing output voltage noise.
Unlike the MAX8867, the MAX8868EUK30 includes active auto-discharge via its SHDN pin: when pulled low, it engages an internal discharge path to ground, rapidly collapsing VOUT without external components. 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 | 3.00V ±1.4% - factory-trimmed, stable across -40°C to +85°C and 0–150mA load. |
| Max Output Current | 150mA - guaranteed continuous delivery; current limit set to 160–500mA for short-circuit robustness. |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 3.165V while maintaining regulation. |
| Output Noise | 30µVRMS (10Hz–100kHz) - achieved with 0.01µF BP capacitor; critical for RF and precision analog circuits. |
| Quiescent Current | 100µA in operation, 10nA in shutdown - preserves battery life in always-on and sleep-mode systems. |
| Auto-Discharge | Active on SHDN low - discharges VOUT to GND via internal path; eliminates need for external bleed resistor. |
| Input Voltage Range | 2.5V to 6.5V - supports single Li-ion, dual alkaline/NiMH, or regulated intermediate rails. |
Pinout & Package
SOT23-5 regular package (5-pin, 1.6mm × 2.9mm × 1.1mm), lead-free, RoHS-compliant. GND pin serves dual role as electrical reference and thermal path - requires soldering to ≥25mm² copper pour for thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable/discharge control | Pulling low enables 10nA shutdown and triggers internal discharge of VOUT; connect to IN for always-on operation. |
| 2 - GND | Power ground and thermal sink | Reference node for all internal circuitry; must be connected to large PCB copper area to dissipate heat and stabilize regulation. |
| 3 - IN | Regulator input supply | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND close to pin for line-transient immunity. |
| 4 - OUT | Regulated output | Delivers up to 150mA at 3.0V; requires ≥1µF low-ESR ceramic capacitor to GND for stability and transient response. |
| 5 - BP | Noise-reduction bypass terminal | Connects internally to 200kΩ resistor; 0.01µF ceramic capacitor here reduces output noise by filtering reference noise. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 30µVRMS output noise with 0.01µF BP cap - meets stringent requirements for RF front-ends and ADC reference supplies. |
| P-channel MOSFET architecture | 100µA operating IQ regardless of load or dropout - eliminates base-drive losses seen in PNP-based LDOs. |
| Auto-discharge function | Internal discharge path activated on SHDN low - removes need for external pull-down, saving board space and BOM cost. |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN < GND - prevents damage during battery insertion errors. |
| Thermal & short-circuit protection | 155°C shutdown with 15°C hysteresis + indefinite short-circuit tolerance - ensures safe operation under fault conditions. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O supplies in GSM/EDGE handsets with single-cell Li-ion input. IC Role / Device Role / Timing Role: Low-noise 3.0V LDO delivering clean power to sensitive RF sections; auto-discharge ensures fast power-down sequencing. Use Value: 30µVRMS noise prevents RX desensitization; 165mV dropout extends usable battery life by ~12 minutes at end-of-discharge. |
Use Scenario: Providing isolated 3.0V supply for PCMCIA card controller logic and interface buffers in laptop expansion slots. IC Role / Device Role / Timing Role: Primary post-regulator converting 5V slot power to stable 3.0V; shutdown/discharge enables hot-swap compliance. Use Value: 10nA shutdown current prevents parasitic drain during card ejection; SOT23-5 footprint fits tight card-edge layouts. |
| Palmtop Computers | Electronic Planners |
|
Use Scenario: Supplying core logic voltage to ARM7-based palmtop SoC and SRAM banks powered from dual AA batteries. IC Role / Device Role / Timing Role: Main system LDO with precise 3.0V output; BP pin filtering suppresses switching noise from DC-DC converters upstream. Use Value: ±1.4% output accuracy maintains CPU timing margins; 100µA IQ extends standby time beyond 72 hours. |
Use Scenario: Regulating 3.0V for LCD controller, touch-screen digitizer, and real-time clock in handheld organizers. IC Role / Device Role / Timing Role: Always-on LDO with auto-discharge - powers RTC during main system shutdown while clearing display bias. Use Value: Active discharge eliminates ghosting on LCD after power-off; reverse battery protection guards against user-insertion errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, 3.0V LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8867EUK30 | No auto-discharge; identical pinout, specs, and package - differs only in SHDN behavior. | Preferred where fast VOUT collapse is unnecessary and lowest BOM cost is prioritized. | Select MAX8867EUK30 if auto-discharge is not required and legacy compatibility with non-discharge designs is needed. |
| Torex XC6206P302MR | 300mA output, 250mV dropout at 300mA, 40µVRMS noise, no BP pin or auto-discharge. | Better current headroom but higher noise and no discharge - suitable for non-RF digital loads only. | Choose XC6206P302MR only if >150mA load or smaller dropout margin is required and noise sensitivity is low. |
Compared with MAX8867EUK30, the MAX8868EUK30 adds essential auto-discharge for clean power sequencing, while the XC6206P302MR trades noise performance and discharge capability for higher current - making MAX8868EUK30 the optimal choice for RF-sensitive, battery-constrained portable systems requiring deterministic shutdown behavior.
Availability
MAX8868EUK30 is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, palmtop computers, and electronic planners requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX8868EUK30 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 designed specifically for ultra-low-noise, low-quiescent-current regulation in space-constrained, battery-powered portable devices - emphasizing RF cleanliness, thermal resilience, and seamless power sequencing.
FAQ
What is the exact output voltage tolerance of the MAX8868EUK30?
The MAX8868EUK30 has a factory-trimmed output voltage of 3.00V with a guaranteed accuracy of ±1.4% over the full operating temperature range (-40°C to +85°C) and load current (0–150mA). This specification is 100% production tested at +25°C and correlation-validated across temperature using Statistical Quality Control methods.
Does the MAX8868EUK30 require an external capacitor on the BP pin?
Yes - the MAX8868EUK30 requires a 0.01µF ceramic capacitor between the BP pin and GND to achieve its specified 30µVRMS output noise. Omitting this capacitor increases noise significantly; using >0.1µF provides no additional noise benefit and degrades startup time and shutdown exit delay.
How does the auto-discharge function work in the MAX8868EUK30?
When the SHDN pin of the MAX8868EUK30 is pulled low, the device enters shutdown mode and simultaneously activates an internal NMOS discharge switch between OUT and GND. This actively pulls VOUT to ground within microseconds - eliminating residual voltage that could cause latch-up or ghosting in downstream circuitry.
Can the MAX8868EUK30 operate with input voltages below 2.5V?
No - the MAX8868EUK30 has a minimum input voltage rating of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V violates specification and may result in loss of regulation, increased dropout, or undefined behavior. The lowest valid VIN is 3.165V (3.0V + 165mV dropout) for full 150mA load.
Is the MAX8868EUK30 pin-compatible with other regulators in the MAX886x family?
Yes - the MAX8868EUK30 is pin-compatible with the MAX8867EUK30, MAX8863, and MAX8864 in the SOT23-5 package. The only functional difference is the BP pin behavior and presence of auto-discharge; all share identical IN, GND, OUT, and SHDN pin assignments and electrical interface requirements.
MAX8868EUK30 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):
- 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
MAX8868EUK30 FAQ
1.How can I place an order for MAX8868EUK30 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8868EUK30 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 MAX8868EUK30 reliable?
The price and inventory of MAX8868EUK30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8868EUK30 is usually 5 days.
3.What payment methods are accepted for MAX8868EUK30?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8868EUK30 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8868EUK30?
MAX8868EUK30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8868EUK30 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 MAX8868EUK30?
For technical support, including MAX8868EUK30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8868EUK30 requirements.
6.How does Aetrix verify that MAX8868EUK30 is sourced from the original manufacturer or authorized distributors?
All MAX8868EUK30 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 MAX8868EUK30 meets industry standards.
7.What is the process for return or replacement of MAX8868EUK30?
All MAX8868EUK30 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8868EUK30, 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 MAX8868EUK30 part is unused and in its original packaging.
Return procedure for MAX8868EUK30:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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