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Analog Devices Inc./Maxim Integrated MAX8885EUK30+
- Part No.:
- MAX8885EUK30+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8885EUK30+.pdf
- Description:
- IC REG LINEAR 150MA LDO
- Quantity:
- Payment:
- Shipping:
Inventory:492
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Product details
Overview
MAX8885EUK30+ from Maxim Integrated is a 3.0V fixed-output, 150mA low-dropout linear regulator with P-channel MOSFET pass element, 85µA no-load supply current, 110mV dropout at 100mA, and active-low open-drain Power-OK (POK) output. It operates from +2.5V to +6.5V input and is optimized for portable battery-powered systems using low-cost, high-ESR tantalum capacitors - such as PCS phones and palmtop computers.
For engineers reviewing the MAX8885EUK30+ datasheet, MAX8885EUK30+ pinout, MAX8885EUK30+ application, or MAX8885EUK30+ equivalent, key selection considerations include its ±1% output voltage accuracy, reverse-battery protection, thermal shutdown with 20°C hysteresis, 60dB PSRR at 100Hz, and compatibility with 4.7µF tantalum output capacitors (ESR > 0.5Ω).
Technical Context
The MAX8885EUK30+ uses an internal 1.25V bandgap reference and error amplifier to regulate output via a 1.1Ω typical P-channel MOSFET pass transistor - eliminating base-drive current and enabling stable 85µA quiescent current across load and dropout conditions. Its feedback is implemented through a factory-laser-trimmed internal resistor divider, fixing VOUT at 3.0V with ±1% tolerance over temperature.
Power-OK monitoring is performed by a dedicated comparator that asserts the open-drain POK pin low when VOUT falls >5.3% below nominal (i.e., <2.84V), with hysteresis ensuring clean release above 2.89V. Shutdown logic disables regulation while limiting supply current to ≤1µA, and reverse-battery protection clamps VIN/GND reverse current to ≤1mA without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±1% over -40°C to +85°C - ensures stable MCU core or RF front-end biasing without external resistors. |
| Max Output Current | 150mA guaranteed - supports moderate-power peripherals like LCD drivers or Bluetooth baseband ICs. |
| Dropout Voltage | 110mV at 100mA load - enables operation down to VIN = 3.11V, extending usable battery life in single-cell Li-ion or 3×AA systems. |
| Quiescent Current | 85µA at no load - minimizes standby power loss in always-on subsystems such as real-time clocks or wake-up controllers. |
| PSRR | 60dB at 100Hz - suppresses low-frequency ripple from switching DC/DC converters feeding the LDO input. |
| POK Threshold | 2.84V (–5.3% of 3.0V) with hysteresis - provides reliable undervoltage detection before brownout resets critical logic. |
| Shutdown Current | ≤1µA max - enables deep-sleep modes in handheld instruments without compromising battery shelf life. |
Pinout & Package
MAX8885EUK30+ is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), with GND serving dual electrical and thermal functions - requiring solder connection to a PCB ground plane or large copper pour for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts +2.5V to +6.5V; requires ≥1µF ceramic bypass capacitor placed within 5mm for stability. |
| 2 GND | Ground and thermal pad | Reference node for all circuitry; must be connected to large PCB copper area to dissipate heat and maintain θJA ≤140°C/W. |
| 3 SHDN | Active-low enable | Pulled high to IN for normal operation; driven low to reduce IQ to ≤1µA - compatible with GPIOs or PMIC control signals. |
| 4 POK | Open-drain Power-OK | Asserts low when VOUT < 2.84V; requires external 100kΩ pull-up to OUT for logic-level signaling; inactive during shutdown. |
| 5 OUT | Regulated 3.0V output | Sources up to 150mA; requires 4.7µF tantalum capacitor (ESR > 0.5Ω) for guaranteed stability - ceramic caps not supported. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current, enabling constant 85µA IQ independent of load or dropout - extends battery runtime in portable devices. |
| Reverse-battery protection | Clamps reverse current to ≤1mA if VIN or SHDN falls below GND - prevents damage during battery insertion errors without external diodes. |
| Thermal shutdown with hysteresis | Shuts down at TJ = +170°C and re-enables at +150°C - provides self-recovering fault protection during sustained overload or poor heatsinking. |
| Optimized for high-ESR tantalum caps | Stable with 4.7µF/0.5Ω–10Ω tantalum output capacitors - avoids cost and size penalty of low-ESR ceramics or polymer caps. |
| Undervoltage POK output | Monitors VOUT continuously and asserts open-drain signal below –5.3% threshold - enables system-level power sequencing and reset generation. |
Applications
| PCS Phones | Palmtop Computers |
|---|---|
Use Scenario: Powering baseband processor I/O rails and RF transceiver analog sections in dual-mode PCS handsets. IC Role / Device Role / Timing Role: Primary 3.0V LDO delivering clean, regulated supply with fast transient response to handle burst-mode TX/RX current spikes. Use Value: 110mV dropout preserves operating margin as Li-ion voltage declines from 4.2V to 3.1V; POK enables safe modem reset before brownout. |
Use Scenario: Supplying SRAM, touch controller, and display driver ICs in compact palmtop PDAs with tight board space. IC Role / Device Role / Timing Role: Low-quiescent-current voltage source for always-on memory retention and wake-up logic during suspend states. Use Value: 85µA IQ minimizes battery drain during multi-day standby; SOT23-5 footprint saves PCB area versus larger regulators. |
| PCMCIA Cards | Electronic Planners |
Use Scenario: Providing isolated 3.0V rail for PCMCIA Type II card logic and interface circuitry in laptop expansion slots. IC Role / Device Role / Timing Role: Input-supply tolerant regulator accepting host 5V or 3.3V bus voltages while delivering stable 3.0V to card ASICs. Use Value: +2.5V to +6.5V input range accommodates variable PCMCIA bus voltages; reverse-battery protection guards against hot-swap misinsertion. |
Use Scenario: Powering microcontroller core, LCD bias, and real-time clock in low-cost electronic organizers with coin-cell backup. IC Role / Device Role / Timing Role: Main system regulator handling both active operation and ultra-low-power calendar mode. Use Value: 1µA shutdown current enables >1-year shelf life on CR2032; ±1% output accuracy maintains RTC timing integrity across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8875EUK30+ | Pin-compatible but optimized for ceramic output capacitors (requires 1µF ceramic, ESR < 0.1Ω); higher 120µA IQ; no reverse-battery protection. | Preferred where board layout mandates ceramic caps or where reverse-polarity risk is absent. | Select MAX8875EUK30+ only if using low-ESR ceramics and thermal/reverse-protection requirements are relaxed. |
| MIC5206-3.0YM5-TR | Pin-compatible; 150mA rated; 100µA IQ; lacks POK output, reverse-battery protection, and thermal hysteresis; ±2% output accuracy. | Suitable for cost-sensitive, non-critical applications where power-good signaling and fault robustness are unnecessary. | Choose MIC5206-3.0YM5-TR only when POK, reverse-battery, and tight accuracy are not required - not a drop-in replacement for safety-critical designs. |
Compared with MAX8885EUK30+, MAX8875EUK30+ trades reverse-battery protection and tighter accuracy for ceramic-cap compatibility, while MIC5206-3.0YM5-TR omits POK and thermal hysteresis entirely - making MAX8885EUK30+ the only option supporting full fault coverage in portable battery systems.
Availability
MAX8885EUK30+ is available at Aetrix Electronics and suitable for PCS phones, palmtop computers, PCMCIA cards, and electronic planners requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across industrial temperature ranges.
Supply support for MAX8885EUK30+ 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 MAX8885 series was designed specifically for cost-sensitive, battery-powered portable electronics needing ultra-low IQ, robust fault protection, and compatibility with inexpensive tantalum output capacitors - targeting PCS/cellular handsets and handheld instrumentation.
FAQ
What is the output voltage tolerance of the MAX8885EUK30+ over temperature?
The MAX8885EUK30+ delivers a fixed 3.0V output with ±1% accuracy over the full –40°C to +85°C operating temperature range, as verified by production testing and SQC correlation. This tolerance ensures reliable operation of 3.0V-tolerant microcontrollers and analog sensors without external trimming. The MAX8885EUK30+ achieves this via factory-laser-trimmed internal feedback resistors and a stable 1.25V bandgap reference.
Can the MAX8885EUK30+ be used with ceramic output capacitors?
No - the MAX8885EUK30+ is explicitly designed for high-ESR tantalum capacitors (≥0.5Ω) and becomes unstable with low-ESR ceramic capacitors. Using ceramic output caps may cause oscillation or poor transient response. For ceramic-cap compatible operation, use the pin-compatible MAX8875EUK30+, which features different internal compensation and requires only 1µF ceramic with ESR < 0.1Ω.
What happens to the POK output of the MAX8885EUK30+ during shutdown?
The POK output of the MAX8885EUK30+ is inactive during shutdown - it neither asserts nor releases and presents high-impedance behavior. POK monitoring only functions when SHDN is high and the regulator is actively regulating. To maintain power-good signaling during deep-sleep modes, external supervision circuitry or a separate voltage monitor must be used alongside the MAX8885EUK30+.
How does the MAX8885EUK30+ provide reverse-battery protection?
The MAX8885EUK30+ integrates internal circuitry that monitors polarity on both IN and SHDN pins. If either pin falls below GND, the device disconnects internal parasitic paths and limits reverse current to ≤1mA - preventing damage during incorrect battery installation. This protection requires no external components and remains active across the full temperature range, unlike discrete diode solutions that degrade with temperature.
What is the minimum input voltage required for the MAX8885EUK30+ to maintain regulation at 150mA load?
At 150mA load, the MAX8885EUK30+ requires a minimum input voltage of 3.165V to maintain regulation, based on its maximum dropout voltage of 165mV (as specified in Electrical Characteristics). Below this VIN, VOUT will begin to droop linearly - for example, at VIN = 3.10V, VOUT ≈ 2.935V. System design must ensure battery voltage stays above this threshold under worst-case load and temperature conditions.
MAX8885EUK30+ 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):
- -
- PSRR:
- 60dB (100Hz)
- Control Features:
- Enable, Power Good
- 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
MAX8885EUK30+ FAQ
1.How can I place an order for MAX8885EUK30+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8885EUK30+ 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 MAX8885EUK30+ reliable?
The price and inventory of MAX8885EUK30+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8885EUK30+ is usually 5 days.
3.What payment methods are accepted for MAX8885EUK30+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8885EUK30+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8885EUK30+?
MAX8885EUK30+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8885EUK30+ 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 MAX8885EUK30+?
For technical support, including MAX8885EUK30+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8885EUK30+ requirements.
6.How does Aetrix verify that MAX8885EUK30+ is sourced from the original manufacturer or authorized distributors?
All MAX8885EUK30+ 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 MAX8885EUK30+ meets industry standards.
7.What is the process for return or replacement of MAX8885EUK30+?
All MAX8885EUK30+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8885EUK30+, 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 MAX8885EUK30+ part is unused and in its original packaging.
Return procedure for MAX8885EUK30+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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