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Analog Devices Inc./Maxim Integrated MAX8875EUK25-T
- Part No.:
- MAX8875EUK25-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8875EUK25-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,964
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Product details
Overview
MAX8875EUK25-T from Maxim Integrated is a 2.5V fixed-output, 150mA low-dropout linear regulator with P-channel MOSFET pass device, 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 battery-powered portable electronics requiring stable low-voltage rail generation.
For engineers reviewing the MAX8875EUK25-T datasheet, MAX8875EUK25-T pinout, MAX8875EUK25-T application, or MAX8875EUK25-T equivalent, key selection criteria include dropout voltage at 150mA (165mV), reverse-battery protection, thermal shutdown (170°C), 1µF ceramic output capacitor support, and guaranteed 150mA output under full temperature range (-40°C to +85°C).
Technical Context
The MAX8875EUK25-T integrates a 1.25V bandgap reference, error amplifier, internal resistor divider, and P-channel MOSFET pass transistor (RDS(ON) ≈ 1.1Ω) to regulate 2.5V output. Its POK output asserts low during dropout, current limit, or thermal shutdown-functioning as a power-on-reset signal down to VIN ≤1V when pulled up via 100kΩ to OUT.
Shutdown is controlled by an active-low SHDN pin drawing ≤1µA in off-state; ground pin serves dual role as electrical return and thermal path. The device uses no base-drive current, enabling constant 85µA quiescent current independent of load or dropout condition-critical for extended battery life in PCS phones, modems, and palmtop computers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% over -40°C to +85°C - ensures stable logic supply for 2.5V I/O domains without external feedback. |
| Max Output Current | 150mA guaranteed - sufficient for powering microcontrollers, RF front-ends, or sensor interfaces in compact portable systems. |
| Dropout Voltage | 165mV at 150mA load - enables operation down to VIN = 2.665V, extending usable battery life in single-cell Li-ion or alkaline applications. |
| No-Load Supply Current | 85µA - remains constant across load, input voltage, and temperature, minimizing standby drain in always-on subsystems. |
| PSRR | 60dB at 100Hz - suppresses low-frequency ripple from noisy DC/DC converters or battery impedance variations. |
| Shutdown Current | ≤1µA max - reduces system-level quiescent consumption during sleep modes without external discharge paths. |
| Thermal Shutdown | 170°C with 20°C hysteresis - provides self-recovery under sustained overload while preventing permanent junction damage. |
| Reverse-Battery Protection | Limits reverse current to ≤1mA if VIN or SHDN falls below GND - eliminates need for external series diode in consumer handheld designs. |
Pinout & Package
MAX8875EUK25-T is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), with exposed pad not electrically connected. GND pin serves as primary thermal path and must be soldered to a large copper area for reliable 150mA operation at elevated ambient temperatures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Regulator input | Accepts +2.5V to +6.5V; requires 1µF ceramic bypass to GND for stability and transient response. |
| 2 - GND | Ground reference & thermal sink | Electrical return path and primary heat conduction route; must connect to ≥100mm² copper pour for thermal reliability. |
| 3 - SHDN | Active-low enable control | Pulled high to IN for normal operation; driven low to reduce supply current to ≤1µA - no external pull-up required. |
| 4 - POK | Open-drain Power-OK indicator | Asserts low during dropout, current limit, or thermal shutdown; requires 100kΩ pull-up to OUT for logic-compatible reset signaling. |
| 5 - OUT | Regulated 2.5V output | Supplies up to 150mA; stabilized by 1µF ceramic capacitor (ESR <0.2Ω); supports power-on-reset via POK timing. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling 85µA quiescent current independent of load or dropout state - extends battery runtime in intermittent-use devices. |
| Power-OK (POK) output | Provides fail-safe monitoring of regulation status with built-in hysteresis; enables hardware reset generation down to VIN ≤1V - critical for reliable boot sequencing. |
| Reverse-battery protection | Clamps reverse current to ≤1mA without external components - protects circuitry during incorrect battery insertion in consumer handsets and modems. |
| Thermal shutdown with hysteresis | Shuts down at 170°C and re-enables after 20°C cooldown - allows safe, self-recovering operation under temporary overload without firmware intervention. |
| 1µF ceramic output capacitor support | Enables compact, low-ESR filtering without tantalum or electrolytic capacitors - reduces BOM cost and board space in space-constrained portable designs. |
Applications
| PCS Telephones | Cellular Telephones |
|---|---|
|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O supplies in dual-mode PCS handsets. IC Role / Device Role / Timing Role: Primary 2.5V LDO delivering clean, regulated voltage to sensitive analog RF sections and digital I/O domains. Use Value: 60dB PSRR at 100Hz and 165mV dropout preserve signal integrity and extend talk time by enabling operation until battery reaches 2.665V. |
Use Scenario: Supplying camera module interface logic and touchscreen controller in GSM/UMTS smartphones. IC Role / Device Role / Timing Role: Fixed 2.5V regulator providing stable power to peripheral ICs during burst-mode data transfers. Use Value: 150mA capability and 85µA quiescent current ensure fast wake-up response and minimal standby drain between user interactions. |
| Palmtop Computers | PCMCIA Cards |
|
Use Scenario: Generating core voltage for low-power ARM-based application processors and SRAM in handheld PDAs. IC Role / Device Role / Timing Role: Main system LDO supplying 2.5V domain with POK-driven reset coordination during cold boot and brownout recovery. Use Value: POK startup response and reverse-battery protection eliminate need for external supervisor ICs or polarity protection diodes - reducing component count. |
Use Scenario: Providing isolated 2.5V supply to PC Card interface logic and flash memory controllers in laptop expansion slots. IC Role / Device Role / Timing Role: Dedicated LDO ensuring compliant voltage levels for CardBus signaling while monitoring rail health via POK. Use Value: Thermal shutdown and short-circuit protection prevent card-level failures due to hot-plug transients or connector faults - improving field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8885EUK25-T | Pin-compatible but designed for higher-ESR output capacitors (e.g., tantalum); 120mA max output; 110µA quiescent current. | Used where ceramic capacitor availability is constrained or ESR >0.5Ω is unavoidable; less suitable for ultra-low-noise 2.5V logic rails. | Select MAX8885EUK25-T only when output capacitor ESR exceeds 0.2Ω and 1µF ceramic is unavailable. |
| MCP1700T-2502E/TT | 250mA rated, 1.6µA quiescent current, no POK output, SOT23-3 package (no SHDN or POK pins). | Lacks power monitoring and shutdown control; requires external enable logic and reset IC for equivalent functionality. | Choose MCP1700T-2502E/TT only for cost-sensitive, non-critical 2.5V rails where POK and SHDN are omitted from system architecture. |
Compared with MAX8875EUK25-T, MAX8885EUK25-T trades lower noise performance and tighter load regulation for higher-ESR capacitor compatibility, while MCP1700T-2502E/TT sacrifices monitoring and control features for lower quiescent current and reduced pin count - making MAX8875EUK25-T optimal for battery-powered systems requiring integrated power supervision.
Availability
MAX8875EUK25-T is available at Aetrix Electronics and suitable for PCS telephones, cellular telephones, and palmtop computers requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance across industrial temperature range.
Supply support for MAX8875EUK25-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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX8875 product line was engineered specifically for battery-powered portable equipment demanding ultra-low quiescent current, integrated power supervision, and minimal external components - targeting PCS phones, modems, and handheld instruments.
FAQ
What is the maximum input voltage rating for the MAX8875EUK25-T?
The MAX8875EUK25-T has an absolute maximum input voltage of +7V referenced to GND, but its operational input range is strictly +2.5V to +6.5V. Exceeding +6.5V may cause regulation failure or trigger thermal shutdown; sustained operation above this range is not characterized and risks reliability degradation. Always maintain VIN within the specified 2.5V–6.5V window for guaranteed 2.5V output performance.
Does the MAX8875EUK25-T require an external pull-up resistor on the POK pin?
Yes, the MAX8875EUK25-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 to the OUT pin is recommended per the datasheet for optimal current efficiency and noise immunity. Leaving POK unconnected or pulling it to VIN instead of OUT may compromise power-on-reset timing accuracy in the MAX8875EUK25-T.
Can the MAX8875EUK25-T operate with a 10µF output capacitor?
Yes, the MAX8875EUK25-T is stable with 10µF ceramic or tantalum output capacitors, and doing so improves PSRR, load-transient response, and output noise performance. However, the minimum required is 1µF ceramic (ESR <0.2Ω) for VOUT ≥2.5V. Using larger values does not harm stability but may slightly increase startup time; the MAX8875EUK25-T's internal compensation is optimized for 1µF–10µF range.
What is the thermal shutdown behavior of the MAX8875EUK25-T during continuous overload?
When the MAX8875EUK25-T junction temperature exceeds +170°C, thermal shutdown disables the pass transistor. After cooling by 20°C (to ~150°C), the device automatically resumes regulation - resulting in pulsed output during sustained overload. This self-recovering behavior prevents permanent damage but is not intended for continuous operation; proper PCB layout with adequate GND copper area is required to avoid entering this mode under 150mA load at +85°C ambient.
Is the MAX8875EUK25-T pin-compatible with other output voltage variants in the same family?
Yes, all MAX8875EUKxx-T variants-including MAX8875EUK25-T-share identical SOT23-5 pinout, footprint, and electrical interface. The only difference is factory-trimmed output voltage (1.5V, 2.5V, 2.7V, 3.0V, 3.3V, or 5.0V), allowing drop-in replacement across voltage options without PCB changes. This simplifies inventory management and design reuse across multiple 2.5V–5.0V system rails.
MAX8875EUK25-T 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):
- 2.5V
- 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 Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX8875EUK25-T FAQ
1.How can I place an order for MAX8875EUK25-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8875EUK25-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 MAX8875EUK25-T reliable?
The price and inventory of MAX8875EUK25-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8875EUK25-T is usually 5 days.
3.What payment methods are accepted for MAX8875EUK25-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8875EUK25-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8875EUK25-T?
MAX8875EUK25-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8875EUK25-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 MAX8875EUK25-T?
For technical support, including MAX8875EUK25-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8875EUK25-T requirements.
6.How does Aetrix verify that MAX8875EUK25-T is sourced from the original manufacturer or authorized distributors?
All MAX8875EUK25-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 MAX8875EUK25-T meets industry standards.
7.What is the process for return or replacement of MAX8875EUK25-T?
All MAX8875EUK25-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8875EUK25-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 MAX8875EUK25-T part is unused and in its original packaging.
Return procedure for MAX8875EUK25-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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