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Analog Devices Inc./Maxim Integrated MAX8885EUK27
- Part No.:
- MAX8885EUK27
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8885EUK27.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,511
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Product details
Overview
MAX8885EUK27 from Maxim Integrated is a 2.7V fixed-output, 150mA low-dropout linear regulator with P-channel MOSFET pass element, 85µA no-load supply current, and active-low open-drain Power-OK (POK) output. It operates from +2.5V to +6.5V input, delivers ±1% output accuracy, and is optimized for use with low-cost, high-ESR tantalum capacitors in battery-powered portable devices.
For engineers reviewing the MAX8885EUK27 datasheet, MAX8885EUK27 pinout, MAX8885EUK27 application, or MAX8885EUK27 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and confirmed alternative options for portable power management designs.
Technical Context
The MAX8885EUK27 implements a 1.25V bandgap reference and error amplifier driving an internal P-channel MOSFET pass transistor (RDS(ON) ≈ 1.1Ω), enabling ultra-low quiescent current independent of load. Its feedback network is fully internal-no external resistors-supporting only factory-preset outputs.
Power-OK detection uses an open-drain comparator monitoring VOUT against a threshold of 95% of nominal output (i.e., 2.565V for 2.7V version), with hysteresis ensuring clean release during recovery. Thermal shutdown activates at +170°C with +20°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 | Fixed 2.7V ±1% - eliminates need for external feedback resistors and ensures stable rail for 2.7V logic or analog circuitry. |
| Max Output Current | 150mA guaranteed - sufficient for baseband processors, RF front-ends, or sensor subsystems in compact handhelds. |
| Dropout Voltage | 110mV at 100mA load - enables operation down to VIN = 2.81V, extending usable life of single-cell Li-ion or alkaline batteries. |
| No-Load Supply Current | 85µA - minimizes standby drain, critical for always-on functions in PCS phones and electronic planners. |
| PSRR | 60dB at 100Hz - suppresses low-frequency noise from switching DC/DC stages or noisy battery sources feeding the LDO input. |
| Shutdown Current | 1µA max - allows deep-sleep modes without compromising system-level power budget. |
| Input Voltage Range | +2.5V to +6.5V - supports direct connection to single-cell Li-ion (2.7–4.2V), dual-cell alkaline (3.0–3.2V), or 5V USB-supplied systems. |
Pinout & Package
MAX8885EUK27 is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), with exposed pad not electrically connected. The GND pin serves dual role as electrical ground and thermal path-requires soldering to ≥25 mm² copper area for reliable 150mA operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Accepts +2.5V to +6.5V; requires ≥1µF ceramic bypass capacitor placed within 5mm to suppress high-frequency noise and ensure stability. |
| 2 GND | Ground / Thermal Pad | Reference node for all internal circuits; must be connected to large PCB copper area to dissipate up to 571mW and maintain junction temperature < +150°C. |
| 3 SHDN | Active-Low Shutdown Control | Pulled high to IN for normal operation; driven low to reduce total supply current to ≤1µA-enables host µC-controlled power gating. |
| 4 POK | Open-Drain Power-OK Output | Asserts low when VOUT drops below 2.565V (95% of 2.7V); requires external 100kΩ pull-up to OUT for logic-compatible signaling. |
| 5 OUT | Regulated Output | Delivers fixed 2.7V ±1%; requires 4.7µF tantalum capacitor (ESR ≥0.5Ω) for guaranteed stability-ceramic caps are incompatible. |
Key Features
| Feature | Design Value |
|---|---|
| Optimized for high-ESR tantalum capacitors | Enables use of low-cost, small-footprint 4.7µF/6.3V Ta caps (≥0.5Ω ESR), avoiding expensive low-ESR ceramics or larger aluminum electrolytics. |
| Undervoltage Power-OK output | Provides system-level fault detection before brownout-allows µC to initiate safe shutdown or data save prior to VOUT collapse. |
| P-channel MOSFET pass element | Eliminates base-drive current loss, delivering constant 85µA quiescent current across full load range (0–150mA) and dropout conditions. |
| Reverse-battery protection | Limits reverse current to ≤1mA if battery is inserted backward-prevents damage to downstream circuitry without external diode or FET. |
| Thermal shutdown with hysteresis | Shuts down at +170°C and re-enables at +150°C-provides self-recovering fault response during sustained overload or poor heatsinking. |
Applications
| PCS Phones | Cellular Phones |
|---|---|
Use Scenario: Powering baseband processor I/O rails and RF synthesizer bias in dual-mode PCS handsets operating on 3.0–4.2V Li-ion packs. IC Role / Device Role / Timing Role: Primary 2.7V LDO supplying noise-sensitive analog blocks; POK signals µC when battery voltage nears end-of-life. Use Value: 110mV dropout extends usable battery range by ~120mV per cell; 60dB PSRR prevents GSM burst noise from corrupting ADC references. |
Use Scenario: Regulating 2.7V supply for SIM card interface, display driver, and audio codec in GSM handsets with tight board space constraints. IC Role / Device Role / Timing Role: Compact, low-quiescent LDO replacing discrete solutions; SHDN enables dynamic power control during call/idle states. Use Value: 85µA no-load current reduces standby drain by >50% vs. legacy bipolar LDOs; SOT23-5 footprint saves >30% PCB area vs. SO-8 alternatives. |
| Palmtop Computers | Electronic Planners |
Use Scenario: Generating stable 2.7V rail for SRAM, touch controller, and IR transceiver in palm-sized PDAs powered by two AA cells. IC Role / Device Role / Timing Role: Main system LDO with integrated reverse-battery protection-critical for user-replaceable battery compartments. Use Value: Reverse-battery current limited to 1mA prevents catastrophic failure during incorrect battery insertion; 150mA output supports simultaneous LCD backlight + IR transmit. |
Use Scenario: Providing regulated 2.7V supply to real-time clock (RTC), memory backup, and button-debounce logic in low-power electronic organizers. IC Role / Device Role / Timing Role: Always-on LDO with 1µA shutdown mode-activated only during calendar sync or alarm wake events. Use Value: 1µA max shutdown current enables >1-year battery life on CR2032 coin cell; ±1% output accuracy maintains RTC timing integrity over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8875EUK27 | Pin-compatible, but optimized for ceramic output capacitors (min 1µF, ESR < 0.1Ω); higher 120µA quiescent current. | Required where board layout mandates ceramic caps due to size, cost, or reliability constraints-e.g., medical wearables. | Select MAX8875EUK27 only if ceramic output capacitance is mandatory; otherwise MAX8885EUK27 offers lower IQ and broader capacitor compatibility. |
| MIC5206-2.7YD5 | Same SOT23-5 package and pinout; uses PNP pass transistor-higher 120µA IQ, 350mV dropout at 150mA, no POK output. | Suitable for non-critical applications lacking power-good monitoring or extreme low-power requirements. | Choose MIC5206-2.7YD5 only when POK is unnecessary and 350mV dropout is acceptable-e.g., auxiliary rails in non-battery-critical modules. |
Compared with MAX8885EUK27, MAX8875EUK27 trades 35µA higher quiescent current for ceramic capacitor flexibility, while MIC5206-2.7YD5 lacks POK and has nearly 3× higher dropout-making MAX8885EUK27 the optimal choice for battery runtime and system supervision in portable 2.7V applications.
Availability
MAX8885EUK27 is available at Aetrix Electronics and suitable for PCS phones, cellular handsets, palmtop computers, and electronic planners requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across -40°C to +85°C.
Supply support for MAX8885EUK27 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 equipment requiring ultra-low quiescent current, robust capacitor compatibility, and integrated power supervision-targeting PCS/cellular phone manufacturers and handheld device OEMs.
FAQ
What is the exact output voltage tolerance and temperature drift of the MAX8885EUK27?
The MAX8885EUK27 delivers a nominal 2.7V output with ±1% initial accuracy over -40°C to +85°C. According to the Electrical Characteristics table, line regulation is ±0.15%/V and load regulation is ±0.01%/mA-meaning output variation remains within ±15mV over full input range and ±1.5mV over full 150mA load range. Temperature coefficient is not separately specified, but typical output voltage vs. temperature plots show <±5mV drift from -40°C to +85°C at 100mA load.
Can the MAX8885EUK27 be used with ceramic output capacitors?
No-the MAX8885EUK27 is explicitly designed for high-ESR tantalum capacitors (≥0.5Ω) and becomes unstable with low-ESR ceramic capacitors. The datasheet warns "Ceramic output capacitors should not be used with the MAX8885" and cites instability risk in the Capacitor Selection section. For ceramic-capable alternatives, Maxim recommends the pin-compatible MAX8875EUK27, which uses different internal compensation.
What is the minimum input voltage required for the MAX8885EUK27 to maintain regulation at 150mA load?
At 150mA load, the MAX8885EUK27 has a maximum dropout voltage of 165mV (per Electrical Characteristics table). Therefore, the minimum input voltage to sustain 2.7V output is 2.7V + 0.165V = 2.865V. This value is confirmed by the Dropout Voltage vs. Output Load graph (MAX8885toc08), which shows ~165mV at 150mA and +25°C. Operation below this VIN risks POK assertion and output collapse.
How does the POK output behave during shutdown or thermal shutdown?
The POK output is inactive (high-impedance) during shutdown (SHDN = GND) and does not reflect output status. During thermal shutdown, POK asserts low-same as during dropout or overcurrent-as the output falls below 95% of nominal (2.565V). The POK function resumes normal monitoring only after thermal recovery and SHDN = IN. This behavior is documented in the Detailed Description section under "Power-OK Output (POK)".
Is the MAX8885EUK27 RoHS compliant and what is its moisture sensitivity level (MSL)?
Yes, the MAX8885EUK27 is RoHS compliant per Maxim's official product change notices and packaging documentation. Its moisture sensitivity level is MSL-1 (unlimited floor life at ≤30°C/60% RH), consistent with standard SOT23-5 plastic packages. This information is verified in Maxim's Packaging Information document SOT5L.EPS and supported by Digi-Key and Mouser product listings for this part.
MAX8885EUK27 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):
- 2.7V
- 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
MAX8885EUK27 FAQ
1.How can I place an order for MAX8885EUK27 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8885EUK27 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 MAX8885EUK27 reliable?
The price and inventory of MAX8885EUK27 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8885EUK27 is usually 5 days.
3.What payment methods are accepted for MAX8885EUK27?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8885EUK27 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8885EUK27?
MAX8885EUK27 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8885EUK27 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 MAX8885EUK27?
For technical support, including MAX8885EUK27 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8885EUK27 requirements.
6.How does Aetrix verify that MAX8885EUK27 is sourced from the original manufacturer or authorized distributors?
All MAX8885EUK27 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 MAX8885EUK27 meets industry standards.
7.What is the process for return or replacement of MAX8885EUK27?
All MAX8885EUK27 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8885EUK27, 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 MAX8885EUK27 part is unused and in its original packaging.
Return procedure for MAX8885EUK27:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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