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Analog Devices Inc./Maxim Integrated MAX8885EUK50+T
- Part No.:
- MAX8885EUK50+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8885EUK50+T.pdf
- Description:
- IC REG LINEAR 5V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,189
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Product details
Overview
MAX8885EUK50+T from Maxim Integrated is a 5.0V fixed-output, 150mA low-dropout linear regulator with P-channel MOSFET pass element, 85µA no-load quiescent 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 stable operation with 4.7µF tantalum capacitors (ESR > 0.5Ω) in portable battery-powered systems.
For engineers reviewing the MAX8885EUK50+T datasheet, MAX8885EUK50+T pinout, MAX8885EUK50+T application, or MAX8885EUK50+T equivalent, key selection criteria include dropout voltage at 150mA (165mV), reverse-battery protection, thermal shutdown at +170°C, and compatibility with high-ESR output capacitors-critical for cost-sensitive PCS/cellular phone power rails.
Technical Context
The MAX8885EUK50+T implements a 1.25V bandgap reference, error amplifier, and internal resistor divider to regulate its fixed 5.0V output. Its P-channel MOSFET pass transistor (RDS(ON) ≈ 1.1Ω) eliminates base-drive current, enabling load-independent 85µA quiescent supply current across all operating conditions including dropout.
Power-OK functionality uses an open-drain N-channel MOSFET that asserts low when VOUT falls >5.3% below nominal-triggered by dropout, current limit, or thermal shutdown. Shutdown logic reduces supply current to ≤1µA, while 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 5.0V ±1% - ensures stable MCU/core voltage without external feedback components. |
| Max Output Current | 150mA - sufficient for baseband processors, RF front-ends, or sensor subsystems in handheld devices. |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 5.165V, extending usable battery life in single-cell Li-ion systems. |
| Quiescent Current | 85µA (no load) - minimizes standby power loss in always-on circuits like real-time clocks or wake-up monitors. |
| PSRR | 60dB at 100Hz - suppresses low-frequency ripple from switching converters or noisy battery sources. |
| Shutdown Current | ≤1µA - supports ultra-low-power sleep modes in portable instrumentation and modems. |
| Thermal Shutdown | +170°C with 20°C hysteresis - provides self-recovery under sustained overload without latch-up. |
Pinout & Package
MAX8885EUK50+T is housed in a 5-pin SOT23-5 package with exposed pad for thermal dissipation. The GND pin serves dual electrical and thermal functions and must be soldered to a large PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Accepts +2.5V to +6.5V; requires ≥1µF bypass capacitor placed within 5mm for stability. |
| 2 GND | Ground / Thermal Pad | Reference node and primary heat path; must connect to large PCB ground plane for 571mW dissipation capability. |
| 3 SHDN | Active-Low Enable | Pull low to enter shutdown (IQ ≤1µA); tie to IN for normal operation. |
| 4 POK | Power-OK Open-Drain Output | Asserts low during dropout, overcurrent, or thermal fault; requires external 100kΩ pull-up to OUT for logic-level signaling. |
| 5 OUT | Regulated Output | Delivers fixed 5.0V ±1%; requires 4.7µF tantalum capacitor (ESR > 0.5Ω) for guaranteed stability. |
Key Features
| Feature | Design Value |
|---|---|
| Optimized for high-ESR tantalum capacitors | Stable with 4.7µF/0.5Ω–10Ω ESR output caps-enables use of low-cost, small-footprint Ta parts instead of ceramics. |
| Reverse-battery protection | Limits reverse current to 1mA when VIN or SHDN < GND-prevents damage during battery insertion errors in consumer handsets. |
| Undervoltage POK output | Monitors VOUT continuously and asserts low if deviation exceeds −5.3%, enabling system-level power sequencing and fault logging. |
| Thermal shutdown with hysteresis | Shuts down at +170°C and re-enables after cooling to +150°C-provides pulsed safe-mode operation during sustained overload. |
| P-channel MOSFET pass element | Eliminates base-drive current, delivering constant 85µA IQ regardless of load or dropout condition-maximizes battery runtime. |
Applications
| PCS Phones | Cellular Phones |
|---|---|
Use Scenario: Powering baseband processor I/O banks and analog peripherals in dual-mode PCS handsets. IC Role / Device Role / Timing Role: Primary 5.0V LDO supplying noise-sensitive RF transceiver bias and ADC reference circuitry. Use Value: 60dB PSRR at 100Hz and 165mV dropout preserve signal integrity and extend talk time from marginal battery voltage. |
Use Scenario: Regulating 5.0V rail for camera modules, display drivers, and USB interface circuitry in GSM handsets. IC Role / Device Role / Timing Role: Fixed-output LDO with POK output for system power monitoring and brownout detection. Use Value: Active-low POK signal enables host µC to initiate graceful shutdown before VOUT collapse during battery depletion. |
| Modems | Hand-Held Instruments |
Use Scenario: Providing clean 5.0V supply to DSL/cable modem PHY layers and line-driver amplifiers. IC Role / Device Role / Timing Role: Low-noise, high-PSRR regulator isolating analog signal paths from digital switching noise. Use Value: 170µVRMS output noise and 60dB PSRR ensure minimal jitter on high-speed data lines. |
Use Scenario: Powering precision op-amps, ADCs, and LCD controllers in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Stable 5.0V source with ±1% accuracy and thermal protection for field-deployed equipment. Use Value: Guaranteed 150mA output and +85°C operation support extended runtime in unventilated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8875EUK50+T | Pin-compatible but optimized for ceramic output capacitors (requires COUT ≥1µF, ESR < 0.1Ω); higher 120µA quiescent current. | Suitable where board space constraints mandate ceramic caps or where lower ESR improves transient response. | Select MAX8875EUK50+T only if ceramic output capacitors are mandatory; MAX8885EUK50+T remains preferred for cost-sensitive Ta-cap designs. |
| MIC5206-5.0YM5-TR | Pin-compatible per datasheet; 150mA output; 180µA quiescent current; no POK output; lacks reverse-battery protection. | Applicable where system-level monitoring replaces POK, and reverse-polarity risk is mitigated externally. | Choose MIC5206-5.0YM5-TR only when POK and reverse-battery features are unnecessary-MAX8885EUK50+T provides superior fault coverage. |
Compared with MAX8875EUK50+T and MIC5206-5.0YM5-TR, MAX8885EUK50+T uniquely combines POK monitoring, reverse-battery protection, and high-ESR capacitor compatibility-making it the optimal choice for ruggedized, cost-driven portable power rails requiring comprehensive fault resilience.
Availability
MAX8885EUK50+T is available at Aetrix Electronics and suitable for PCS phones, cellular handsets, and hand-held instruments requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across −40°C to +85°C.
Supply support for MAX8885EUK50+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 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 battery-powered portable electronics needing ultra-low quiescent current, robust fault protection, and compatibility with low-cost tantalum output capacitors-targeting PCS, cellular, and modem power architectures.
FAQ
What is the maximum input voltage rating for the MAX8885EUK50+T?
The MAX8885EUK50+T has an absolute maximum input voltage of +7V referenced to GND, but its specified operational input range is +2.5V to +6.5V. Operating above +6.5V risks violating the device's safe operating area and may trigger thermal shutdown or degrade long-term reliability. Always maintain VIN within the recommended range for guaranteed 5.0V regulation and 150mA output capability.
Does the MAX8885EUK50+T require an external pull-up resistor on the POK pin?
Yes, the MAX8885EUK50+T POK pin is an open-drain N-channel MOSFET output and requires an external pull-up resistor to generate a valid logic-high level. A 100kΩ resistor connected from POK to the OUT pin is recommended per the datasheet; this value balances low current consumption (<50nA) with adequate rise time for most microcontroller interrupt inputs.
Can ceramic capacitors be used with the MAX8885EUK50+T?
No-ceramic capacitors are not recommended for the MAX8885EUK50+T output. Its internal compensation is optimized for high-ESR tantalum capacitors (≥0.5Ω). Using low-ESR ceramics can cause instability and oscillation. For ceramic-capable alternatives, refer to the pin-compatible MAX8875EUK50+T, which is explicitly designed for COUT ≥1µF ceramic capacitors with ESR < 0.1Ω.
What is the dropout voltage of the MAX8885EUK50+T at full 150mA load?
The MAX8885EUK50+T has a typical dropout voltage of 165mV at 150mA load and +25°C, defined as VIN − VOUT when VOUT drops 100mV below nominal. This allows the device to maintain regulation down to VIN = 5.165V, making it suitable for single-cell Li-ion batteries nearing end-of-discharge (e.g., 3.4V–4.2V range with boost stage or direct 5V rail).
How does reverse-battery protection function in the MAX8885EUK50+T?
The MAX8885EUK50+T incorporates dedicated circuitry that detects reverse polarity on either the IN or SHDN pin relative to GND and disconnects internal paths to limit reverse current to ≤1mA. This prevents damage during incorrect battery installation in consumer handsets and eliminates the need for external series diodes or MOSFETs-reducing BOM cost and forward-voltage drop in the MAX8885EUK50+T power path.
MAX8885EUK50+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:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 5V
- 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
MAX8885EUK50+T FAQ
1.How can I place an order for MAX8885EUK50+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8885EUK50+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 MAX8885EUK50+T reliable?
The price and inventory of MAX8885EUK50+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8885EUK50+T is usually 5 days.
3.What payment methods are accepted for MAX8885EUK50+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8885EUK50+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8885EUK50+T?
MAX8885EUK50+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8885EUK50+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 MAX8885EUK50+T?
For technical support, including MAX8885EUK50+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8885EUK50+T requirements.
6.How does Aetrix verify that MAX8885EUK50+T is sourced from the original manufacturer or authorized distributors?
All MAX8885EUK50+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 MAX8885EUK50+T meets industry standards.
7.What is the process for return or replacement of MAX8885EUK50+T?
All MAX8885EUK50+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8885EUK50+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 MAX8885EUK50+T part is unused and in its original packaging.
Return procedure for MAX8885EUK50+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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