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Analog Devices Inc./Maxim Integrated MAX8875EUK25+
- Part No.:
- MAX8875EUK25+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8875EUK25+.pdf
- Description:
- IC REG LINEAR 2.5V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,012
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Product details
Overview
MAX8875EUK25+ from Maxim Integrated is a 2.5V 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 voltage accuracy over temperature, and is optimized for battery-powered portable electronics requiring stable low-quiescent-current regulation.
For engineers reviewing the MAX8875EUK25+ datasheet, MAX8875EUK25+ pinout, MAX8875EUK25+ application, or MAX8875EUK25+ equivalent, key selection criteria include dropout voltage (110mV at 100mA), 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+ uses an internal 1.25V bandgap reference and error amplifier to regulate output via a 1.1Ω (typ) P-channel MOSFET pass transistor - eliminating base-drive current and enabling load-independent 85µA quiescent current. Its POK output is an open-drain N-MOSFET that asserts low during dropout, current limit, or thermal shutdown, with hysteresis and operation down to VIN ≤1V for power-on-reset functionality.
Regulation stability relies on a fixed internal feedback divider; no external resistors are required. The device integrates reverse-battery protection limiting reverse current to 1mA, thermal shutdown with 20°C hysteresis, and short-circuit protection with 390mA typical current limit - all implemented without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% over -40°C to +85°C - eliminates need for external feedback network and ensures precision rail generation for logic or analog circuitry. |
| Max Output Current | 150mA guaranteed - supports moderate-power microcontrollers, RF front-ends, or sensor interfaces in space-constrained portable designs. |
| Dropout Voltage | 110mV at 100mA load - enables operation down to VIN = 2.61V while maintaining regulation, extending usable battery life in single-cell Li-ion or multi-cell alkaline systems. |
| Quiescent Current | 85µA at no load - remains constant across load and input voltage, critical for long standby time in always-on battery devices. |
| PSRR | 60dB at 100Hz - suppresses low-frequency supply noise from switching converters or noisy battery sources before sensitive analog/RF stages. |
| Shutdown Current | 1µA max - reduces system leakage during sleep modes without requiring additional isolation circuitry. |
| Thermal Shutdown | 170°C with 20°C hysteresis - provides self-recovery under sustained overload while preventing permanent junction damage. |
Pinout & Package
MAX8875EUK25+ is housed in a miniature 5-pin SOT23-5 package (2.9mm × 1.6mm × 1.1mm), with GND serving dual electrical and thermal functions - requiring direct connection to PCB ground plane or large copper pour for effective heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN | Regulator Input | Accepts +2.5V to +6.5V unregulated supply; requires local 1µF ceramic bypass to GND for stability and transient response. |
| 2: GND | Ground / Thermal Pad | Primary return path and primary thermal conduction path - must be soldered to ≥100mm² copper area for rated 150mA operation at +85°C ambient. |
| 3: SHDN | Active-Low Enable | Logic-low disables regulator and reduces IQ to ≤1µA; tied to IN for always-on operation; compatible with 1.8V–5V control logic. |
| 4: POK | Power-OK Open-Drain Output | Asserts low when VOUT deviates >1% from nominal - requires external 100kΩ pull-up to OUT for logic-level signaling and POR delay capability. |
| 5: OUT | Regulated Output | Delivers fixed 2.5V ±1%; bypassed with 1µF ceramic capacitor (ESR <0.2Ω) for stability; supports up to 150mA continuous load. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Enables 85µA load-independent quiescent current and eliminates base-drive losses - extends battery runtime in intermittent-load applications. |
| Integrated reverse-battery protection | Limits reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage and data corruption in consumer handhelds with user-replaceable batteries. |
| Power-OK (POK) with POR capability | Provides reliable power-on reset down to VIN ≤1V and monitors regulation integrity - eliminates need for external supervisor IC in compact designs. |
| Thermal shutdown with hysteresis | Self-recovering protection at 170°C (±10°C) with 20°C hysteresis - maintains safe operation during transient overloads without manual intervention. |
| 1µF ceramic output capacitor support | Guarantees stability with low-ESR ceramics (X7R/X5R) - reduces BOM count and board area vs. larger tantalum or electrolytic solutions. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
Use Scenario: Powering baseband processor I/O rails and RF transceiver bias supplies in GSM/CDMA handsets with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 2.5V LDO delivering clean, regulated power to noise-sensitive analog sections and digital I/O domains. Use Value: 60dB PSRR at 100Hz and 110mV dropout enable stable operation down to 2.61V battery voltage, maximizing talk time without brownout resets. |
Use Scenario: Providing isolated 2.5V supply for PCMCIA card controller logic and interface buffers in laptop expansion slots. IC Role / Device Role / Timing Role: Local point-of-load regulator ensuring voltage compliance during hot-insertion and dynamic load switching events. Use Value: 150mA rating and fast load-transient response (<10µs recovery) prevent bus arbitration failures during card enumeration and data burst transfers. |
| Palmtop Computers | Electronic Planners |
Use Scenario: Supplying core logic voltage for ARM-based palmtop SoCs operating from dual AA/AAA alkaline cells (2.4V–3.2V). IC Role / Device Role / Timing Role: Main system LDO regulating 2.5V domain for CPU, memory, and display controller. Use Value: 85µA quiescent current and 1µA shutdown current extend standby time to >30 days between battery changes. |
Use Scenario: Powering real-time clock (RTC), SRAM backup, and touch-screen controller in handheld organizers with coin-cell or AAA primary batteries. IC Role / Device Role / Timing Role: Low-noise, low-IQ regulator for always-on subsystems requiring precise voltage and minimal leakage. Use Value: Reverse-battery protection prevents accidental polarity reversal damage during battery replacement, 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+ | Pin-compatible, identical pinout and 2.5V output, but designed for higher-ESR output capacitors (e.g., tantalum); 120mV dropout at 100mA. | Preferred where ceramic capacitor availability is constrained or ESR >0.5Ω is unavoidable due to cost or sourcing. | Select MAX8885EUK25+ only if using >1µF tantalum or polymer capacitors; otherwise MAX8875EUK25+ offers better PSRR and lower dropout with ceramics. |
| MCP1700T-2502E/TT | 2.5V fixed LDO in SOT23-5, 250mA rating, 1.6µA quiescent current, no POK output, 175mV dropout at 100mA. | Lacks power-good monitoring and reverse-battery protection; suited for non-critical, cost-sensitive applications without supervision requirements. | Choose MCP1700T-2502E/TT only when POK, thermal hysteresis, and reverse-polarity protection are unnecessary and higher output current is needed. |
Compared with MAX8885EUK25+, the MAX8875EUK25+ delivers lower dropout and superior PSRR using 1µF ceramics, while MCP1700T-2502E/TT trades supervision features and efficiency for higher current and lower unit cost - making MAX8875EUK25+ optimal for battery-powered systems demanding reliability, low noise, and intelligent power monitoring.
Availability
MAX8875EUK25+ is available at Aetrix Electronics and suitable for cellular handsets, palmtop computers, PCMCIA cards, and electronic planners requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across industrial temperature range.
Supply support for MAX8875EUK25+ 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 series was designed specifically for ultra-low-power, battery-operated portable equipment - emphasizing minimal quiescent current, integrated protection, and small-footprint regulation without external compensation.
FAQ
What is the maximum input voltage for the MAX8875EUK25+?
The MAX8875EUK25+ supports an absolute maximum input voltage of +7V, but its specified operating range is +2.5V to +6.5V. Operation above +6.5V risks exceeding absolute maximum ratings and may cause permanent damage. For reliable 2.5V regulation with margin, VIN should remain ≤6.5V under all conditions including ripple and transients.
Does the MAX8875EUK25+ require an external resistor network to set the output voltage?
No, the MAX8875EUK25+ does not require external resistors. It is a factory-trimmed, fixed 2.5V output device with internal feedback divider. The "25" suffix in MAX8875EUK25+ explicitly denotes the 2.5V preset output - eliminating design complexity, layout area, and tolerance drift associated with external resistor networks.
Can the MAX8875EUK25+ be used with a 10µF output capacitor?
Yes, the MAX8875EUK25+ is stable with 10µF ceramic or tantalum output capacitors. While 1µF is the minimum recommended for stability, larger values improve PSRR, reduce output noise (170µVRMS typical), and enhance load-transient response - especially beneficial in systems with rapidly switching digital loads or RF sections sharing the same supply rail.
What happens to the POK output of the MAX8875EUK25+ during shutdown?
The POK output of the MAX8875EUK25+ is inactive during shutdown - it enters high-impedance state and does not assert low. POK monitoring is only functional when SHDN is high and the regulator is enabled. This behavior prevents false power-fail signals during intentional system sleep modes controlled by the SHDN pin.
Is thermal derating required for the MAX8875EUK25+ at elevated ambient temperatures?
Yes, thermal derating is required. The MAX8875EUK25+ has θJA = 140°C/W and a 571mW maximum power dissipation at TA = +70°C. Above +70°C, power dissipation must be reduced by 7.1mW per °C. For example, at TA = +85°C, maximum allowable power drops to ~465mW - limiting usable (VIN – 2.5V) × 150mA accordingly unless enhanced PCB copper is used.
MAX8875EUK25+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- 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+ FAQ
1.How can I place an order for MAX8875EUK25+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8875EUK25+ 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+ reliable?
The price and inventory of MAX8875EUK25+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8875EUK25+ is usually 5 days.
3.What payment methods are accepted for MAX8875EUK25+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8875EUK25+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8875EUK25+?
MAX8875EUK25+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8875EUK25+ 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+?
For technical support, including MAX8875EUK25+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8875EUK25+ requirements.
6.How does Aetrix verify that MAX8875EUK25+ is sourced from the original manufacturer or authorized distributors?
All MAX8875EUK25+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX8875EUK25+?
All MAX8875EUK25+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8875EUK25+, 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+ part is unused and in its original packaging.
Return procedure for MAX8875EUK25+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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