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Analog Devices Inc./Maxim Integrated MAX8875EUK36+
- Part No.:
- MAX8875EUK36+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8875EUK36+.pdf
- Description:
- 150MA, LOW-DROPOUT LINEAR REGULA
- Quantity:
- Payment:
- Shipping:
Inventory:1,852
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Product details
Overview
MAX8875EUK36+ from Maxim Integrated is a 3.6V fixed-output, 150mA low-dropout linear regulator with P-channel MOSFET pass device, 85µA no-load quiescent 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-noise voltage regulation.
For engineers reviewing the MAX8875EUK36+ datasheet, MAX8875EUK36+ pinout, MAX8875EUK36+ application, or MAX8875EUK36+ equivalent, key selection criteria include dropout voltage (110mV at 100mA), reverse-battery protection, thermal shutdown (170°C), 1µF ceramic capacitor compatibility, and guaranteed 150mA output under full temperature range (-40°C to +85°C).
Technical Context
The MAX8875EUK36+ employs an internal 1.25V bandgap reference and error amplifier driving a 1.1Ω (typ) P-channel MOSFET pass transistor, enabling load-independent quiescent current and eliminating base-drive losses inherent in PNP-based LDOs. Its feedback network is fully internal, fixing VOUT at 3.6V via factory-trimmed resistor divider.
Power-OK functionality uses an open-drain N-channel comparator monitoring regulated output voltage with hysteresis; POK asserts low when VOUT falls >1% below nominal during dropout, current limit, or thermal shutdown. Shutdown logic disables regulation while maintaining <1µA supply current, and reverse-battery protection limits reverse current to ≤1mA when VIN or SHDN falls below GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.6V ±1% over -40°C to +85°C - ensures precise rail generation for 3.3V-tolerant logic with margin. |
| Max Output Current | 150mA guaranteed - supports moderate-power RF modules, microcontrollers, and analog sensors without derating. |
| Dropout Voltage | 110mV at 100mA load - enables operation down to VIN = 3.71V, extending usable battery life in single-cell Li-ion systems. |
| Quiescent Current | 85µA at no load - minimizes standby power loss in always-on portable devices like cordless handsets. |
| PSRR | 60dB at 100Hz - suppresses low-frequency ripple from switching converters or noisy DC sources feeding the LDO input. |
| Shutdown Current | ≤1µA max - allows deep-sleep modes in battery-backed real-time clocks or memory retention circuits. |
| Thermal Shutdown | 170°C activation with 20°C hysteresis - provides self-recovering fault protection during sustained overload or poor PCB thermal design. |
Pinout & Package
MAX8875EUK36+ is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), with GND serving dual electrical and thermal functions - requires soldering to ≥25 mm² copper area for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Accepts +2.5V to +6.5V; bypass with 1µF ceramic capacitor to GND for stability and noise reduction. |
| 2 GND | Ground / Thermal Pad | Reference node and primary heat path; must connect to large PCB ground plane to maintain θJA ≤140°C/W. |
| 3 SHDN | Active-Low Enable | Logic low (<0.4V) disables regulation and reduces IQ to ≤1µA; tie to IN for always-on operation. |
| 4 POK | Power-OK Open-Drain Output | Asserts low when VOUT deviates >1%; requires external 100kΩ pull-up to OUT for logic-level signaling. |
| 5 OUT | Regulated Output | 3.6V fixed output sourcing up to 150mA; bypass with 1µF ceramic capacitor (ESR <0.2Ω) for stability. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current, enabling constant 85µA IQ across load, temperature, and dropout conditions. |
| Reverse-battery protection | Restricts reverse current to ≤1mA if VIN or SHDN is driven below GND - prevents damage in misconnected battery packs. |
| 1µF ceramic capacitor support | Stable regulation with low-ESR ceramics simplifies BOM and reduces board space vs. tantalum or electrolytic alternatives. |
| Power-OK with POR capability | POK remains functional down to VIN ≤1V, enabling reliable power-on-reset sequencing even during brownout recovery. |
| Thermal-foldback current limiting | Combines 390mA (typ) current limit with 170°C thermal shutdown and 20°C hysteresis for robust fault recovery. |
Applications
| PCS Telephones | Cellular Telephones |
|---|---|
Use Scenario: Primary 3.6V supply for RF transceiver ICs and baseband processors in dual-mode PCS handsets operating on single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-noise, high-PSRR voltage regulator providing clean 3.6V rail during burst transmission and deep-sleep states. Use Value: 60dB PSRR at 100Hz suppresses switching noise from PMIC DC/DC converters; 85µA IQ extends standby time beyond 10 days per charge. |
Use Scenario: Core voltage source for application processors and memory subsystems in GSM/GPRS handsets with tight battery voltage swing (4.2V–3.2V). IC Role / Device Role / Timing Role: Fixed-output LDO delivering regulated 3.6V with 110mV dropout to sustain operation until battery reaches 3.71V. Use Value: Enables full 150mA load capability down to end-of-life battery voltage, avoiding premature system reset during discharge. |
| Cordless Telephones | PCMCIA Cards |
Use Scenario: Main 3.6V rail for DECT radio front-end and DSP in rechargeable cordless phone handsets with NiMH battery packs. IC Role / Device Role / Timing Role: Regulator with reverse-battery protection guarding against accidental battery reversal during hot-swap charging. Use Value: ≤1mA reverse current prevents damage to sensitive RF ICs and preserves battery integrity during field maintenance. |
Use Scenario: Local 3.6V supply for PCMCIA Type II card controllers and interface logic in laptop expansion slots. IC Role / Device Role / Timing Role: Fast-transient-response LDO supporting dynamic load steps from 0mA to 100mA during card enumeration and data transfer. Use Value: Load-transient response within ±20mV (10µs settling) ensures stable I/O voltage during hot-plug detection and configuration reads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8885EUK36+T | Pin-compatible; supports higher-ESR output capacitors (up to 3Ω) but requires larger COUT (≥4.7µF) | Preferred where cost-sensitive designs use bulk aluminum or polymer capacitors instead of ceramics | Select MAX8885EUK36+T only if ceramic capacitor availability or cost is constrained; otherwise MAX8875EUK36+ offers superior transient response with 1µF. |
| TPS76336DBVR | 3.6V fixed, 150mA, but uses PNP pass transistor; IQ = 80µA (typ), dropout = 230mV @150mA, no POK output | Lacks power-good signaling and reverse-battery protection; lower PSRR (45dB @100Hz) | Choose TPS76336DBVR only when POK and reverse protection are unnecessary and board space permits larger dropout margin. |
Compared with MAX8885EUK36+T and TPS76336DBVR, the MAX8875EUK36+ uniquely combines ultra-low dropout (110mV), integrated POK, reverse-battery protection, and 1µF ceramic stability - making it optimal for space-constrained, battery-critical portable systems demanding full fault coverage.
Availability
MAX8875EUK36+ is available at Aetrix Electronics and suitable for PCS telephones, cellular telephones, and cordless telephones requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across industrial temperature range.
Supply support for MAX8875EUK36+ 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 MAX8875EUK36+ belongs to Maxim's precision low-quiescent-current LDO family, designed specifically for battery-powered portable equipment where extended runtime, small solution size, and comprehensive fault protection are mandatory.
FAQ
What is the output voltage tolerance and temperature drift of the MAX8875EUK36+?
The MAX8875EUK36+ delivers a nominal 3.6V output with ±1% initial accuracy over the full -40°C to +85°C operating range. Typical output voltage drift is ±0.02%/°C, resulting in ≤±30mV total deviation across temperature - verified by production testing and SQC correlation, not extrapolated.
Does the MAX8875EUK36+ require an external pull-up resistor on the POK pin?
Yes, the MAX8875EUK36+ 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 OUT is recommended per Maxim's typical operating circuit; omitting it leaves POK unasserted and nonfunctional.
Can the MAX8875EUK36+ operate with input voltages below 2.5V?
No - the MAX8875EUK36+ has a specified minimum input voltage of +2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this violates datasheet limits and may result in unregulated output or undefined behavior; it is not characterized or guaranteed.
What is the maximum allowable power dissipation for the MAX8875EUK36+ in SOT23-5 package?
The MAX8875EUK36+ has a continuous power dissipation limit of 571mW at TA = +70°C in the 5-pin SOT23 package, with derating of 7.1mW/°C above that ambient. This assumes proper GND pad thermal connection; exceeding this limit risks thermal shutdown activation or long-term reliability degradation.
Is the MAX8875EUK36+ compatible with 10µF output capacitors for improved PSRR?
Yes - while the MAX8875EUK36+ is optimized for stability with 1µF ceramic capacitors (ESR <0.2Ω), using a 10µF ceramic output capacitor improves PSRR and load-transient response without compromising stability, as confirmed in Typical Operating Characteristics graphs and Applications Information section.
MAX8875EUK36+ 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+ FAQ
1.How can I place an order for MAX8875EUK36+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8875EUK36+ 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+ reliable?
The price and inventory of MAX8875EUK36+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8875EUK36+ is usually 5 days.
3.What payment methods are accepted for MAX8875EUK36+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8875EUK36+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8875EUK36+?
MAX8875EUK36+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8875EUK36+ 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+?
For technical support, including MAX8875EUK36+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8875EUK36+ requirements.
6.How does Aetrix verify that MAX8875EUK36+ is sourced from the original manufacturer or authorized distributors?
All MAX8875EUK36+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX8875EUK36+?
All MAX8875EUK36+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8875EUK36+, 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+ part is unused and in its original packaging.
Return procedure for MAX8875EUK36+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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