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Analog Devices Inc./Maxim Integrated MAX8875EUK15-T
- Part No.:
- MAX8875EUK15-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8875EUK15-T.pdf
- Description:
- IC REG LINEAR 150MA LDO
- Quantity:
- Payment:
- Shipping:
Inventory:7,250
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Product details
Overview
The MAX8875EUK15-T from Maxim Integrated is a 150mA, low-dropout linear regulator with fixed 1.5V output, P-channel MOSFET pass device, and active-low open-drain Power-OK (POK) output. It operates from +2.5V to +6.5V input, delivers ±1% output voltage accuracy, maintains 85µA no-load supply current, and supports stable regulation with only a 3.3µF ceramic output capacitor (ESR <0.2Ω). It is designed for space-constrained, battery-powered portable electronics requiring precise low-voltage rail generation.
For engineers reviewing the MAX8875EUK15-T datasheet, MAX8875EUK15-T pinout, MAX8875EUK15-T application, or MAX8875EUK15-T equivalent, key selection criteria include its 1.5V fixed output, reverse-battery protection, thermal shutdown at +170°C with 20°C hysteresis, 165mV dropout at 150mA load, and guaranteed 150mA output current under -40°C to +85°C operation.
Technical Context
The MAX8875EUK15-T implements a bandgap-referenced error amplifier driving an internal P-channel MOSFET pass transistor (RDS(ON) ≈ 1.1Ω typ), enabling dropout voltage proportional to load current (VDROPOUT = RDS(ON) × IOUT). Its feedback network is fully internal-no external resistors-making it a true fixed-output LDO.
It integrates dedicated protection circuitry: reverse-battery detection limiting reverse current to ≤1mA, thermal shutdown with automatic recovery (170°C trip, 150°C restart), short-circuit current limiting (160mA min / 600mA max), and shutdown logic reducing supply current to ≤1µA. The POK output activates only when VOUT falls >5.3% below nominal (for VOUT = 1.5V) during dropout, overload, or thermal fault-not during SHDN assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% over -40°C to +85°C - enables direct powering of low-voltage logic cores without external feedback. |
| Max Output Current | 150mA guaranteed - sufficient for baseband processors, RF front-end biasing, and sensor signal chains in handheld devices. |
| Dropout Voltage | 165mV at 150mA load - allows operation down to VIN = 1.665V, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Quiescent Current | 85µA typical at no load - remains constant across load and input voltage, critical for standby power budgeting in always-on subsystems. |
| PSRR | 60dB at 100Hz - suppresses low-frequency ripple from switching converters or noisy battery sources feeding the LDO input. |
| Shutdown Current | ≤1µA maximum - ensures negligible drain during deep sleep modes in portable equipment. |
| Power-OK Threshold | VOUT falling >5.3% below 1.5V (i.e., ≤1.42V) - provides reliable undervoltage detection for system reset sequencing. |
Pinout & Package
Package: 5-pin SOT23-5 (JEDEC MO-178AA), 1.6mm × 2.9mm footprint, exposed pad not present. GND pin serves dual role as electrical ground and primary thermal path - requires soldering to ≥25mm² copper area for full thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Accepts +2.5V to +6.5V supply; bypass with ≥1µF ceramic capacitor to GND for stability. |
| 2 GND | Ground / Thermal Pad | Reference node for all internal circuits; must be connected to large PCB copper area to dissipate heat and maintain <150°C junction temperature. |
| 3 SHDN | Active-Low Shutdown Control | Logic low (≤0.4V) disables regulator and reduces IQ to ≤1µA; tie to IN for always-on operation. |
| 4 POK | Open-Drain Power-OK Output | Active-low indicator; requires external 100kΩ pull-up to OUT; asserts when VOUT drops >5.3% below 1.5V. |
| 5 OUT | Regulated Output | Delivers fixed 1.5V; requires 3.3µF ceramic capacitor (ESR <0.2Ω) to GND for stability at this voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-Battery Protection | Limits reverse current to ≤1mA if VIN or SHDN falls below GND - prevents damage during incorrect battery insertion in consumer devices. |
| Thermal Shutdown with Hysteresis | Shuts down at +170°C and auto-restarts at +150°C - enables safe intermittent operation under sustained overload without manual reset. |
| P-Channel MOSFET Pass Device | Eliminates base-drive current loss - ensures 85µA quiescent current is invariant across load, input voltage, and temperature. |
| Low-ESR Capacitor Optimization | Stable with 3.3µF ceramic cap (ESR <0.2Ω) for 1.5V version - avoids need for bulky tantalum or aluminum electrolytics in compact designs. |
| Power-On Reset Functionality | POK asserts at VIN ≥1V even before regulation - enables early system initialization and clean POR timing independent of LDO startup delay. |
Applications
| Handheld Medical Sensors | Low-Voltage RF Front-Ends |
|---|---|
|
Use Scenario: Portable blood glucose meters and pulse oximeters powered by single AAA/AA cells requiring stable 1.5V for analog front-end ICs and microcontroller I/O rails. IC Role / Device Role / Timing Role: Primary 1.5V power rail generator with reverse-battery protection and POK-driven MCU reset during battery swap. Use Value: Enables use of cost-effective alkaline cells while guaranteeing ±1% output accuracy and <1µA shutdown leakage to extend shelf life. |
Use Scenario: Biasing low-noise amplifiers (LNAs) and mixer ICs in Bluetooth/Wi-Fi modules where 1.5V supplies reduce power consumption and thermal load. IC Role / Device Role / Timing Role: Clean, low-noise 1.5V supply with 60dB PSRR at 100Hz - suppresses switching noise from adjacent DC-DC converters. Use Value: Maintains RF signal integrity by limiting output noise to 170µVRMS (10Hz–100kHz) and supporting fast load-transient response near dropout. |
| Industrial Handheld Scanners | Wearable Health Monitors |
|
Use Scenario: Barcode scanners operating from rechargeable Li-ion batteries with wide VIN range (3.0V–4.2V) and demanding 150mA peak current for laser diode drivers. IC Role / Device Role / Timing Role: Main 1.5V rail for ASIC logic and interface circuitry; POK signals host processor when battery voltage drops below operational threshold. Use Value: 165mV dropout at 150mA allows full functionality until cell voltage falls to 1.665V - maximizes runtime per charge cycle. |
Use Scenario: Continuous ECG/PPG monitoring patches powered by coin cells (CR2032), requiring ultra-low quiescent current and robust reverse-polarity tolerance. IC Role / Device Role / Timing Role: Always-on 1.5V supply for analog sensor signal conditioning and BLE SoC I/O - enabled via SHDN tied to IN. Use Value: 85µA no-load IQ and ≤1µA shutdown current minimize battery drain; reverse-battery protection prevents field failure during user battery replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout, fixed-output regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8885EUK15-T | Pin-compatible, identical 1.5V output and POK function, but optimized for higher-ESR capacitors (e.g., 10µF tantalum); 100µA IQ vs. 85µA. | Suitable where board layout constraints prevent use of low-ESR ceramics or where legacy capacitor sourcing mandates higher-ESR types. | Select MAX8885EUK15-T only if ceramic capacitor availability is limited; otherwise MAX8875EUK15-T offers lower IQ and smaller solution size. |
| TPS78215DRVR | 1.5V fixed output, 150mA, 1.5µA IQ in shutdown, but no POK output; 250mV dropout at 150mA; SOT-23-5 package. | Lacks power-good signaling - requires external supervisor IC for reset generation; higher dropout reduces usable battery range. | Choose TPS78215DRVR only if POK is unnecessary and lowest possible shutdown current is prioritized over battery runtime. |
Compared with MAX8875EUK15-T, MAX8885EUK15-T trades 15µA higher quiescent current for greater capacitor flexibility, while TPS78215DRVR eliminates POK functionality and increases dropout by 85mV - impacting end-of-life battery utilization in portable systems.
Availability
MAX8875EUK15-T is available at Aetrix Electronics and suitable for handheld medical sensors, low-voltage RF front-ends, industrial handheld scanners, wearable health monitors, and battery-powered instrumentation requiring stable component supply with guaranteed long-term continuity.
Supply support for MAX8875EUK15-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 series was designed specifically for ultra-low-power, space-constrained battery-operated portable equipment - emphasizing minimal quiescent current, reverse-battery resilience, and integrated power-good monitoring without external components.
FAQ
What is the minimum input voltage required for the MAX8875EUK15-T to maintain regulation?
The MAX8875EUK15-T requires VIN ≥ (VOUT + VDROPOUT). With a guaranteed 165mV dropout at 150mA, the minimum functional input is 1.665V. However, the absolute minimum specified input voltage is +2.5V per Absolute Maximum Ratings - operation below this violates datasheet conditions and may cause undefined behavior or reliability risk. Always maintain VIN ≥2.5V for compliant operation.
Does the MAX8875EUK15-T require an external feedback resistor network?
No, the MAX8875EUK15-T does not require external feedback resistors. Its 1.5V output is set by a factory-laser-trimmed internal resistor divider connected to a 1.25V bandgap reference. This eliminates component count, layout area, and tolerance drift - making the MAX8875EUK15-T a true fixed-output LDO with no external adjustment capability.
Can the POK pin of the MAX8875EUK15-T be used as a power-on-reset signal?
Yes, the POK pin of the MAX8875EUK15-T provides a built-in power-on-reset function. It asserts low when VIN rises above ~1V - well before regulation is established - and remains low until VOUT reaches 94.7% of 1.5V (≤1.42V). This enables reliable system initialization timing without adding discrete reset ICs, and the open-drain structure allows flexible pull-up configuration.
What output capacitor is required for stable operation of the MAX8875EUK15-T?
The MAX8875EUK15-T requires a 3.3µF ceramic output capacitor with ESR <0.2Ω for stable operation at its 1.5V output. This differs from higher-output versions (≥2.5V), which specify 1µF. Using a lower-value capacitor risks oscillation or poor transient response; X7R or X5R dielectrics are recommended to ensure capacitance stability across -40°C to +85°C.
How does reverse-battery protection work in the MAX8875EUK15-T?
The MAX8875EUK15-T monitors polarity on both IN and SHDN pins. If either falls below GND, internal circuitry disconnects parasitic paths and limits reverse current to ≤1mA - preventing damage during incorrect battery installation. This protection operates independently of regulator state and requires no external components, making it ideal for consumer devices with user-replaceable batteries.
MAX8875EUK15-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:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 1.25V (3.15V)
- Voltage - Output (Max):
- 6.5V
- Voltage Dropout (Max):
- 0.12V @ 50mA
- Current - Output:
- 120mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 82 µA
- PSRR:
- -
- Control Features:
- Enable
- 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
MAX8875EUK15-T FAQ
1.How can I place an order for MAX8875EUK15-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8875EUK15-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 MAX8875EUK15-T reliable?
The price and inventory of MAX8875EUK15-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8875EUK15-T is usually 5 days.
3.What payment methods are accepted for MAX8875EUK15-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8875EUK15-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8875EUK15-T?
MAX8875EUK15-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8875EUK15-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 MAX8875EUK15-T?
For technical support, including MAX8875EUK15-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8875EUK15-T requirements.
6.How does Aetrix verify that MAX8875EUK15-T is sourced from the original manufacturer or authorized distributors?
All MAX8875EUK15-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 MAX8875EUK15-T meets industry standards.
7.What is the process for return or replacement of MAX8875EUK15-T?
All MAX8875EUK15-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8875EUK15-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 MAX8875EUK15-T part is unused and in its original packaging.
Return procedure for MAX8875EUK15-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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