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Analog Devices Inc./Maxim Integrated MAX8875EUK36-T
- Part No.:
- MAX8875EUK36-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8875EUK36-T.pdf
- Description:
- IC REG LINEAR 150MA LDO
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
The MAX8875EUK36-T from Maxim Integrated is a 3.6V 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 - designed for battery-powered portable electronics requiring stable low-voltage rail generation and supply monitoring.
For engineers reviewing the MAX8875EUK36-T datasheet, MAX8875EUK36-T pinout, MAX8875EUK36-T application, or MAX8875EUK36-T equivalent, key selection criteria include dropout voltage at 100mA (110mV), ±1% output accuracy over temperature, reverse-battery protection, thermal shutdown at +170°C, and compatibility with 1µF ceramic output capacitors.
Technical Context
The MAX8875EUK36-T implements a bandgap-referenced error amplifier driving a 1.1Ω typical P-channel MOSFET pass transistor, enabling load-independent quiescent current and eliminating base-drive losses inherent in PNP-based LDOs. Its internal feedback divider is factory-trimmed to deliver precisely 3.6V output.
Power-OK functionality uses an open-drain N-channel comparator referenced to 95% of nominal VOUT, asserting low during dropout, thermal shutdown, or current limit. The POK signal remains inactive during SHDN assertion and supports power-on-reset delay via external RC network.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.6V ±1% over -40°C to +85°C - ensures stable microcontroller core or RF IC supply without external resistors. |
| Max Output Current | 150mA guaranteed - sufficient for baseband processors, LCD bias, or low-power sensors in handheld devices. |
| Dropout Voltage | 110mV at 100mA load - enables operation down to VIN = 3.71V, extending usable life of single-cell Li-ion batteries. |
| Quiescent Current | 85µA at no load - minimizes standby drain, critical for always-on battery-backed systems like modems or planners. |
| PSRR | 60dB at 100Hz - suppresses low-frequency ripple from switching converters or noisy DC/DC stages upstream. |
| Shutdown Current | 1µA max - reduces system-level leakage when host MCU disables power rail during deep sleep. |
| Thermal Shutdown | Activates at +170°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Reverse-Battery Protection | Limits reverse current to ≤1mA if VIN or SHDN falls below GND - protects against accidental battery reversal in consumer handsets. |
Pinout & Package
Package: 5-pin SOT23-5 (JEDEC MO-178AA), 2.9mm × 1.6mm footprint, exposed pad not present - compatible with standard reflow profiles and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts 2.5V–6.5V supply; requires 1µF ceramic bypass to GND for stability and transient response. |
| 2 GND | Ground reference & thermal path | Electrical return and primary heat conduction path; must connect to large copper area for thermal management. |
| 3 SHDN | Active-low enable control | Pulled high to IN for normal operation; driven low to reduce IQ to ≤1µA - no external pull-up required. |
| 4 POK | Open-drain Power-OK indicator | Sinks current when VOUT drops below 95% of 3.6V; requires external 100kΩ pull-up to OUT for logic-level signaling. |
| 5 OUT | Regulated output | Delivers 3.6V ±1% up to 150mA; bypassed with 1µF ceramic capacitor (ESR <0.2Ω) for full-temperature stability. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass device | Eliminates base-drive current loss, enabling constant 85µA IQ across light/heavy loads and dropout conditions. |
| 1µF ceramic output capacitor support | Reduces BOM count and board area vs. larger tantalum or electrolytic caps; enables fast load-transient recovery. |
| Power-OK (POK) with POR capability | Provides reliable power-fail detection down to VIN ≤1V and enables configurable reset timing via external RC on POK pin. |
| Reverse-battery protection | Prevents >1mA reverse current flow during incorrect battery insertion - eliminates need for external series diode. |
| Thermal shutdown with hysteresis | Enables safe intermittent operation under fault conditions while preventing latch-up; 20°C cooldown threshold avoids oscillation. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering baseband processor I/O rails and SIM card interface in GSM/CDMA handsets with single Li-ion cell. IC Role / Device Role / Timing Role: Primary 3.6V LDO delivering regulated supply with real-time POK monitoring for safe processor reset. Use Value: 110mV dropout extends talk time by ~12 minutes per charge cycle versus higher-dropout alternatives; 85µA IQ preserves standby time over weeks. |
Use Scenario: Generating clean 3.6V supply for PCMCIA Type II memory or modem cards inserted into laptops or PDAs. IC Role / Device Role / Timing Role: Local voltage regulation with POK-driven card-detect handshake to prevent enumeration before stable power. Use Value: Reverse-battery protection safeguards card circuitry during hot-swap events; 1µF capacitor compatibility simplifies layout in tight card-edge space. |
| Electronic Planners | Modems |
|
Use Scenario: Supplying real-time clock (RTC), SRAM backup, and touch-screen controller in battery-backed PDAs. IC Role / Device Role / Timing Role: Always-on LDO maintaining 3.6V rail during main system sleep; POK signals brownout to wake controller. Use Value: 1µA shutdown current enables >1-year RTC battery life; ±1% output accuracy ensures precise timekeeping over temperature. |
Use Scenario: Providing isolated 3.6V supply for analog front-end (AFE) and line-driver ICs in ADSL/V.92 modems. IC Role / Device Role / Timing Role: Low-noise local regulation decoupling AFE from noisy digital supply; POK validates power before data transmission. Use Value: 60dB PSRR at 100Hz attenuates switching noise from upstream DC/DC; thermal protection prevents failure during extended line-test modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent-current LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8885EUK36-T | Pin-compatible but optimized for higher-ESR capacitors (e.g., tantalum); 120µA IQ; no reverse-battery protection. | Preferred where board-level EMI filtering requires bulk capacitance >10µF or where reverse-battery risk is absent. | Select MAX8885EUK36-T only if output capacitor ESR exceeds 0.2Ω and reverse-battery exposure is controlled externally. |
| MCP1700T-3602E/TT | 3.6V fixed, 250mA output, 1.6µA IQ, no POK output, SOT23-3 package (no SHDN/POK pins). | Suitable for simpler systems needing only enable control - lacks supply monitoring and reverse protection. | Choose MCP1700T-3602E/TT only when POK signaling and reverse-battery protection are unnecessary and higher output current is required. |
Compared with MAX8875EUK36-T, MAX8885EUK36-T trades reverse-battery protection and lower IQ for higher-ESR capacitor flexibility, while MCP1700T-3602E/TT offers greater current headroom but omits critical monitoring and protection features essential for portable equipment reliability.
Availability
The MAX8875EUK36-T is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, electronic planners, and modems requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for MAX8875EUK36-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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, communications, and consumer applications.
The MAX8875 series was developed specifically for ultra-low-power, battery-critical portable electronics - emphasizing minimal quiescent current, robust protection features, and small-footprint integration in space- and energy-constrained devices.
FAQ
What is the exact output voltage tolerance and temperature drift of the MAX8875EUK36-T?
The MAX8875EUK36-T delivers 3.6V with ±1% initial accuracy over -40°C to +85°C, confirmed by 100% production testing at +25°C and SQC correlation across temperature. Output voltage drift is bounded by ±0.01%/°C line regulation and ±0.015%/mA load regulation, resulting in <±20mV total deviation across full operating range - sufficient for powering 3.3V-tolerant I/O rails and low-voltage microcontrollers.
Does the MAX8875EUK36-T require an external pull-up resistor on the POK pin, and what value is recommended?
Yes, the MAX8875EUK36-T POK pin is an open-drain N-channel output and requires an external pull-up resistor to generate a logic-high signal when VOUT is in regulation. A 100kΩ resistor connected to the OUT pin is specified in the datasheet for optimal current efficiency and noise immunity; values up to 1MΩ remain functional but increase susceptibility to noise and slow rise time.
Can the MAX8875EUK36-T operate with input voltages below 2.5V, and what happens during dropout?
No - the MAX8875EUK36-T has a minimum input voltage rating of +2.5V per Absolute Maximum Ratings. Below this, internal circuitry may not bias correctly. During dropout (VIN < VOUT + VDROPOUT), the POK output asserts low, and regulation degrades linearly; the device continues sourcing current up to 150mA until thermal shutdown activates at +170°C junction temperature.
Is the MAX8875EUK36-T compatible with 10µF output capacitors, and how does that affect stability and noise?
Yes, the MAX8875EUK36-T remains stable with 10µF ceramic or tantalum output capacitors - though the datasheet specifies 1µF minimum for guaranteed stability. Larger capacitors improve PSRR above 1kHz, reduce output noise spectral density (e.g., 170µVRMS over 10Hz–100kHz), and enhance load-transient response, especially for pulsed loads like RF power amplifiers.
How does reverse-battery protection function in the MAX8875EUK36-T, and what is its current limit?
The MAX8875EUK36-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 - verified across -40°C to +85°C. This eliminates the need for external series diodes in consumer handsets and modems where battery reversal is a known field failure mode.
MAX8875EUK36-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):
- 3.6V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA
- 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
MAX8875EUK36-T FAQ
1.How can I place an order for MAX8875EUK36-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8875EUK36-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 MAX8875EUK36-T reliable?
The price and inventory of MAX8875EUK36-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8875EUK36-T is usually 5 days.
3.What payment methods are accepted for MAX8875EUK36-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8875EUK36-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8875EUK36-T?
MAX8875EUK36-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8875EUK36-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 MAX8875EUK36-T?
For technical support, including MAX8875EUK36-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8875EUK36-T requirements.
6.How does Aetrix verify that MAX8875EUK36-T is sourced from the original manufacturer or authorized distributors?
All MAX8875EUK36-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 MAX8875EUK36-T meets industry standards.
7.What is the process for return or replacement of MAX8875EUK36-T?
All MAX8875EUK36-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8875EUK36-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 MAX8875EUK36-T part is unused and in its original packaging.
Return procedure for MAX8875EUK36-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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