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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 LDO
- Quantity:
- Payment:
- Shipping:
Inventory:2,101
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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, and active-low open-drain Power-OK (POK) output. It operates from +2.5V to +6.5V input, delivers ±1% output accuracy over temperature, and is optimized for stable operation with 4.7µF tantalum output capacitors in portable battery-powered systems.
For engineers reviewing the MAX8885EUK30 datasheet, MAX8885EUK30 pinout, MAX8885EUK30 application, or MAX8885EUK30 equivalent, key selection criteria include dropout voltage at 150mA (165mV), thermal shutdown threshold (+170°C), reverse-battery protection, 1µA max shutdown current, and compatibility with high-ESR output capacitors - critical for cost-sensitive PCS/cellular phone power rails.
Technical Context
The MAX8885EUK30 implements a 1.25V bandgap reference and error amplifier driving an internal P-channel MOSFET pass transistor (RDS(ON) ≈ 1.1Ω) to regulate output. Its feedback network is fully internal, setting VOUT = 3.0V with ±1% accuracy across –40°C to +85°C.
Power-OK monitoring compares VOUT against a –5.3% threshold (2.841V for 3.0V output); POK asserts low during dropout, current limit, or thermal shutdown. Shutdown logic disables regulation when SHDN < 0.4V, reducing IQ to ≤1µA while retaining reverse-battery protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±1% over –40°C to +85°C - eliminates external resistor divider and ensures stable core/peripheral rail in portable devices. |
| Max Output Current | 150mA guaranteed - supports baseband processors, RF front-ends, and display drivers in handheld instruments without derating. |
| Dropout Voltage | 165mV at 150mA load - enables operation down to VIN = 3.165V, extending usable battery life in single-cell Li-ion or dual-cell alkaline systems. |
| Quiescent Current | 85µA at no load - minimizes standby power loss; independent of load, enabling >1-year shelf life in always-on modules. |
| PSRR | 60dB at 100Hz - suppresses low-frequency noise from switching converters or noisy battery sources feeding sensitive analog circuitry. |
| Shutdown Current | ≤1µA maximum - allows deep-sleep modes in palmtop computers and PCMCIA cards without compromising system wake-up integrity. |
| Thermal Shutdown | +170°C activation with +20°C hysteresis - provides self-recovering fault protection during sustained overload or poor PCB thermal design. |
Pinout & Package
Package: 5-pin SOT23-5 (JEDEC MO-178AA), 2.9mm × 1.6mm footprint, GND pin serves as thermal path - requires soldering to ≥25mm² copper pour for full 150mA operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts +2.5V to +6.5V; bypassed with ≥1µF capacitor placed <5mm away to suppress input ripple and improve transient response. |
| 2 GND | Ground and thermal pad | Reference node for all internal circuits; primary heat dissipation path - must connect to large PCB ground plane for thermal reliability. |
| 3 SHDN | Active-low enable | Logic low (<0.4V) disables regulation and reduces IQ to ≤1µA; tied to IN for always-on operation. |
| 4 POK | Open-drain Power-OK | Asserts low when VOUT falls >5.3% below nominal (i.e., <2.841V); requires external 100kΩ pull-up to OUT for logic-level signaling. |
| 5 OUT | Regulated 3.0V output | Sources up to 150mA; requires 4.7µF tantalum capacitor (ESR ≥0.5Ω) for stability - ceramic capacitors cause oscillation. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss - maintains 85µA quiescent current across all load conditions including dropout. |
| Optimized for high-ESR tantalum capacitors | Stable with 4.7µF/0.5–10Ω ESR output caps - enables use of low-cost, small-footprint Ta caps instead of expensive low-ESR ceramics. |
| Undervoltage Power-OK output | Provides system-level reset or warning before brownout - POK threshold set at –5.3% of VOUT with hysteresis for noise immunity. |
| Reverse-battery protection | Limits reverse current to ≤1mA if VIN or SHDN falls below GND - prevents damage during battery insertion errors in consumer handsets. |
| Thermal and short-circuit protection | Self-limiting behavior under fault: current limit ≥160mA (min), thermal shutdown at +170°C with automatic recovery after 20°C cooldown. |
Applications
| PCS Phones | Cellular Phones |
|---|---|
Use Scenario: Powering baseband processor I/O banks and RF transceiver bias rails in dual-mode PCS handsets. IC Role / Device Role / Timing Role: Primary 3.0V LDO delivering clean, regulated voltage with fast load-transient response to handle burst-mode transmission. Use Value: 165mV dropout extends usable battery range by ~120mV per cell; POK signal synchronizes modem reset with power rail collapse. |
Use Scenario: Supplying camera module sensor and ISP in GSM/UMTS smartphones with tight board space constraints. IC Role / Device Role / Timing Role: Low-noise, low-quiescent-current regulator for image signal chain - minimizing thermal drift and standby drain. Use Value: 85µA IQ enables multi-week standby; ±1% VOUT accuracy ensures consistent ADC reference and color fidelity. |
| Palmtop Computers | PCMCIA Cards |
Use Scenario: Providing 3.0V logic supply to ARM-based application processors and SRAM in Windows CE handhelds. IC Role / Device Role / Timing Role: Main system LDO with thermal protection - sustaining 150mA during CPU-intensive tasks without shutdown. Use Value: GND-as-heat-sink design allows full-rated current in ultra-thin form factors; reverse-battery protection guards against hot-swap errors. |
Use Scenario: Regulating 3.0V for CompactFlash and Wi-Fi adapter logic on laptop expansion slots. IC Role / Device Role / Timing Role: Hot-plug tolerant LDO with 1µA shutdown mode - enabling instant card detection and low-power enumeration. Use Value: SHDN-controlled enable/disable eliminates leakage paths; POK confirms valid VOUT before host driver initialization. |
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 COUT ≥1µF, ESR <0.1Ω); higher PSRR (70dB @100Hz); 100µA IQ. | Used where board layout mandates ceramic caps for size or cost; unsuitable with tantalum due to instability risk. | Select MAX8875EUK30 only if ceramic output capacitors are mandatory; otherwise MAX8885EUK30 offers better cost/size trade-off with Ta caps. |
| MIC5206-3.0YM5 | Pin-compatible; 150mA rating; 120mV dropout at 150mA; no POK output; 80µA IQ; requires 2.2µF ceramic cap. | Lacks power-good monitoring - requires external supervisor IC for system reset; not suitable for safety-critical brownout detection. | Choose MIC5206-3.0YM5 when POK is unnecessary and ceramic caps are preferred; MAX8885EUK30 is superior when integrated fault signaling is required. |
Compared with MAX8875EUK30 and MIC5206-3.0YM5, the MAX8885EUK30 uniquely combines POK functionality, reverse-battery protection, and stable operation with low-cost tantalum capacitors - making it optimal for cost-sensitive, battery-powered portable designs requiring robust fault reporting and simplified BOM.
Availability
MAX8885EUK30 is available at Aetrix Electronics and suitable for PCS phones, cellular handsets, palmtop computers, and PCMCIA cards requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
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) designs precision analog, mixed-signal, and power-management ICs for industrial, automotive, communications, and consumer applications.
The MAX8885EUK30 belongs to Maxim's low-quiescent-current LDO family, engineered specifically for battery-powered portable equipment requiring high efficiency, small footprint, and integrated fault monitoring - not general-purpose regulation.
FAQ
What is the output voltage tolerance of the MAX8885EUK30 over temperature?
The MAX8885EUK30 guarantees ±1% output voltage accuracy over the full operating temperature range of –40°C to +85°C. This specification is verified across production lots using Statistical Quality Control methods and applies to the fixed 3.0V output without external trimming components.
Can the MAX8885EUK30 be used with ceramic output capacitors?
No - the MAX8885EUK30 is explicitly designed for stable operation with high-ESR tantalum capacitors (≥0.5Ω). Using ceramic capacitors causes phase-margin degradation and potential oscillation. For ceramic-capable alternatives, refer to the pin-compatible MAX8875EUK30 data sheet.
What is the minimum input voltage required for the MAX8885EUK30 to maintain regulation at 150mA?
The MAX8885EUK30 requires VIN ≥ VOUT + dropout voltage. At 150mA load and +25°C, dropout is 165mV - so minimum VIN = 3.0V + 0.165V = 3.165V. At +85°C, dropout increases slightly; design margin should include worst-case 175mV.
How does the POK output behave during shutdown?
The POK output is inactive during shutdown - it remains in high-impedance state regardless of VOUT level. POK only monitors regulation status when SHDN is high (enabled). To detect shutdown events, monitor the SHDN pin directly or use its logic level as system enable control.
What thermal design guidance applies to the MAX8885EUK30 at full 150mA load?
At 150mA and VIN = 4.2V, power dissipation is ~180mW. The SOT23-5 package has θJA = 140°C/W; with no PCB copper, junction temperature rise would exceed limits. A ≥25mm² GND copper pour is mandatory to keep TJ < +150°C under continuous load.
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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