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Analog Devices Inc./Maxim Integrated MAX8875EUK26-T
- Part No.:
- MAX8875EUK26-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8875EUK26-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX8875EUK26-T from Maxim Integrated is a 2.6V 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 accuracy over temperature, and is optimized for battery-powered portable electronics including cellular handsets and modems.
For engineers reviewing the MAX8875EUK26-T datasheet, MAX8875EUK26-T pinout, MAX8875EUK26-T application, or MAX8875EUK26-T equivalent, key selection criteria include dropout voltage at 150mA (165mV), thermal shutdown threshold (+170°C), reverse-battery protection, 1µF ceramic capacitor stability, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX8875EUK26-T 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 quiescent current. Its POK comparator monitors VOUT against a hysteresis-controlled threshold (−5.3% to −13.5% depending on load and VOUT level) and asserts low during dropout, current limit, or thermal shutdown.
Shutdown logic disables regulation when SHDN is pulled low, reducing supply current to ≤1µA. Reverse-battery protection limits reverse current to ≤1mA if VIN or SHDN falls below GND, while thermal protection cycles the pass transistor off/on with 20°C hysteresis above +170°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.6V ±1% over −40°C to +85°C - ensures stable core voltage for 2.5V–2.7V logic rails without external feedback. |
| Max Output Current | 150mA guaranteed - supports moderate-power RF modules, audio codecs, or sensor interfaces in portable systems. |
| Dropout Voltage | 165mV at 150mA load - enables operation down to VIN = 2.76V, extending usable battery life in single-cell Li-ion or alkaline applications. |
| No-Load Supply Current | 85µA - 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 DC sources feeding the LDO input. |
| Power-OK Threshold | −5.3% VOUT (no load), −13.5% VOUT (at current limit) - provides precise undervoltage detection for system reset or battery fuel-gauge triggering. |
| Shutdown Current | ≤1µA max - enables deep-sleep modes in host microcontrollers without compromising system wake-up latency. |
| Thermal Shutdown | +170°C activation with +20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
MAX8875EUK26-T is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), with GND serving dual role as electrical reference and thermal path. The package requires soldering to a large copper pad or ground plane for effective heat dissipation.
| 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 reference & thermal sink | Electrical return path and primary heat conduction route - must connect to large PCB copper area. |
| 3 - SHDN | Active-low enable control | Pull low to disable regulation; connect to IN for always-on operation; ≤1µA leakage in shutdown. |
| 4 - POK | Open-drain Power-OK indicator | Asserts low when VOUT deviates >5.3% (no load) or >13.5% (ILIM); requires external 100kΩ pull-up to OUT. |
| 5 - OUT | Regulated output | Delivers fixed 2.6V ±1%; bypass with ≥1µF ceramic capacitor (ESR <0.2Ω) for full-load stability. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current, enabling 85µA quiescent current independent of load or input voltage. |
| 1µF ceramic output capacitor support | Reduces BOM count and board area vs. larger tantalum or electrolytic capacitors; compatible with X7R/X5R dielectrics. |
| Reverse-battery protection | Limits reverse current to ≤1mA if VIN or SHDN falls below GND - prevents damage during incorrect battery insertion. |
| Thermal shutdown with hysteresis | Auto-recovery cycling at +170°C activation / +150°C release enables fault-tolerant operation without manual reset. |
| Power-OK with POR capability | POK asserts low during startup until VOUT reaches regulation; works down to VIN ≤1V for robust power-on sequencing. |
| Short-circuit protected output | Withstands indefinite output-to-GND shorts without degradation - simplifies system-level fault handling design. |
Applications
| Cellular Handset RF Subsystem | Portable Medical Sensor Node |
|---|---|
|
Use Scenario: Powers RF transceiver ICs (e.g., GSM/EDGE front-end) requiring clean, stable 2.6V bias under dynamic transmit load. IC Role / Device Role / Timing Role: Primary voltage regulator supplying RF power amplifier bias and synthesizer VCO core. Use Value: 165mV dropout enables operation through full Li-ion discharge curve (4.2V → 2.76V); 60dB PSRR minimizes LO phase noise from noisy PMIC rails. |
Use Scenario: Supplies ultra-low-power analog front-end (AFE) and ADC in battery-operated glucose monitor or pulse oximeter. IC Role / Device Role / Timing Role: Precision low-noise voltage source for signal conditioning and data acquisition circuitry. Use Value: 85µA quiescent current extends shelf life in standby mode; ±1% output accuracy ensures consistent ADC reference scaling across temperature. |
| PCMCIA Modem Card | Industrial Hand-Held Instrument |
|
Use Scenario: Provides regulated 2.6V to UART interface, line driver, and DSP in hot-pluggable PCMCIA modem cards. IC Role / Device Role / Timing Role: Hot-swap tolerant LDO with reverse-battery and short-circuit protection for field-replaceable modules. Use Value: Reverse-battery protection prevents damage during card insertion/removal errors; POK output signals valid VOUT to host controller before data transfer. |
Use Scenario: Powers microcontroller core and LCD controller in ruggedized handheld test equipment operating from AA/AAA batteries. IC Role / Device Role / Timing Role: Main system regulator delivering stable 2.6V to mixed-signal SoC with integrated ADC/DAC. Use Value: 150mA output supports simultaneous LCD backlight and sensor excitation; thermal shutdown protects against enclosure overheating in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8885EUK26-T | Pin-compatible, supports higher-ESR output capacitors (e.g., tantalum); 120µA quiescent current vs. 85µA. | Preferred where ceramic capacitor availability is constrained or ESR >0.2Ω is unavoidable due to cost/form factor. | Select MAX8885EUK26-T only if output capacitor ESR exceeds 0.2Ω and ceramic alternatives are unavailable. |
| MCP1702T-2602E/MB | 250mA output, 2µA quiescent current, no POK output; SOT23-5 package with identical pinout. | Lacks power-good signaling and thermal cycling behavior; better suited for ultra-low-IQ sleep-critical apps without reset coordination. | Choose MCP1702T-2602E/MB when POK functionality is unnecessary and sub-µA shutdown current is mandatory. |
Compared with MAX8875EUK26-T, MAX8885EUK26-T trades lower PSRR and higher IQ for wider capacitor compatibility, while MCP1702T-2602E/MB sacrifices POK and thermal hysteresis for extreme low-power shutdown - making MAX8875EUK26-T optimal for battery-powered systems requiring coordinated power sequencing and fault reporting.
Availability
MAX8875EUK26-T is available at Aetrix Electronics and suitable for cellular handsets, portable medical sensors, PCMCIA modems, and industrial handheld instruments requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX8875EUK26-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, automotive, and communications applications.
The MAX8875 series was engineered specifically for battery-powered portable electronics needing ultra-low quiescent current, small footprint, and reliable power-good signaling - targeting PCS phones, modems, and handheld instrumentation.
FAQ
What is the exact output voltage tolerance of the MAX8875EUK26-T over temperature?
The MAX8875EUK26-T guarantees ±1% output voltage accuracy over the full operating temperature range of −40°C to +85°C. This specification is production-tested at +25°C and correlated across temperature using Statistical Quality Control methods. At +25°C, typical deviation is tighter, but system designs must rely on the ±1% min/max bound for worst-case margining in the MAX8875EUK26-T.
Does the MAX8875EUK26-T require an external pull-up resistor on the POK pin?
Yes, the MAX8875EUK26-T POK pin is an open-drain N-channel MOSFET output and requires an external pull-up resistor to function as a logic-level signal. A 100kΩ resistor to the OUT pin is recommended per the datasheet to minimize current draw while ensuring clean logic transitions. Leaving POK unconnected renders the power-good function inoperable in the MAX8875EUK26-T.
Can the MAX8875EUK26-T operate with a 2.5V input supply?
No - the MAX8875EUK26-T has a minimum input voltage of +2.5V, but its 2.6V output requires sufficient headroom. With a 165mV dropout at 150mA, the absolute minimum input is 2.765V. At 2.5V input, the MAX8875EUK26-T enters dropout and cannot maintain regulation; output collapses toward input minus dropout, making 2.5V insufficient for functional operation of the MAX8875EUK26-T.
What is the maximum allowable output capacitor ESR for stable operation of the MAX8875EUK26-T?
The MAX8875EUK26-T is optimized for ceramic output capacitors with ESR <0.2Ω. Using capacitors exceeding this ESR - such as standard tantalum or aluminum electrolytics - risks instability, overshoot, or oscillation. For higher-ESR applications, the pin-compatible MAX8885EUK26-T is specified; the MAX8875EUK26-T itself does not support ESR >0.2Ω without external compensation.
How does reverse-battery protection work in the MAX8875EUK26-T?
The MAX8875EUK26-T incorporates internal circuitry that monitors polarity on both IN and SHDN pins. If either falls below GND, parasitic paths are disconnected and reverse current is clamped to ≤1mA - preventing damage during incorrect battery installation. This protection is active regardless of enable state and is intrinsic to the MAX8875EUK26-T's architecture, requiring no external components.
MAX8875EUK26-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):
- 2.6V
- 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
MAX8875EUK26-T FAQ
1.How can I place an order for MAX8875EUK26-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8875EUK26-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 MAX8875EUK26-T reliable?
The price and inventory of MAX8875EUK26-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8875EUK26-T is usually 5 days.
3.What payment methods are accepted for MAX8875EUK26-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8875EUK26-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8875EUK26-T?
MAX8875EUK26-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8875EUK26-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 MAX8875EUK26-T?
For technical support, including MAX8875EUK26-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8875EUK26-T requirements.
6.How does Aetrix verify that MAX8875EUK26-T is sourced from the original manufacturer or authorized distributors?
All MAX8875EUK26-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 MAX8875EUK26-T meets industry standards.
7.What is the process for return or replacement of MAX8875EUK26-T?
All MAX8875EUK26-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8875EUK26-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 MAX8875EUK26-T part is unused and in its original packaging.
Return procedure for MAX8875EUK26-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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