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Analog Devices Inc./Maxim Integrated MAX8875EUK33/GH9
- Part No.:
- MAX8875EUK33/GH9
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8875EUK33/GH9.pdf
- Description:
- 150MA, LOW-DROPOUT LINEAR REGULA
- Quantity:
- Payment:
- Shipping:
Inventory:1,623
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Product details
Overview
MAX8875EUK33/GH9 from Maxim Integrated is a 3.3V, 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. It operates from +2.5V to +6.5V input, delivers ±1% output voltage accuracy, and supports battery-powered portable electronics including cellular phones and modems.
For engineers reviewing the MAX8875EUK33/GH9 datasheet, MAX8875EUK33/GH9 pinout, MAX8875EUK33/GH9 application, or MAX8875EUK33/GH9 equivalent, key selection criteria include dropout voltage (110mV at 100mA), reverse-battery protection, thermal shutdown at +170°C, and compatibility with 1µF ceramic output capacitors.
Technical Context
The MAX8875EUK33/GH9 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. Its feedback network is fully internal, setting fixed 3.3V output without external resistors.
Power-OK monitoring uses an open-drain N-channel comparator referenced to VOUT, asserting low when output falls >1% below nominal (e.g., <3.267V at 3.3V). POK activation occurs during dropout, current limit, or thermal shutdown-but remains inactive during SHDN assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±1% - factory-trimmed, no external resistors required |
| Max Output Current | 150mA - guaranteed continuous delivery under full thermal limits |
| Dropout Voltage | 110mV at 100mA - enables operation down to VIN = 3.41V while maintaining regulation |
| Quiescent Current | 85µA - constant across load, temperature, and input voltage for extended battery life |
| PSRR | 60dB at 100Hz - suppresses low-frequency supply ripple in noise-sensitive analog circuits |
| Shutdown Current | 1µA max - enables ultra-low-power sleep modes in portable systems |
| Thermal Shutdown | +170°C with 20°C hysteresis - prevents permanent damage during sustained overload |
Pinout & Package
MAX8875EUK33/GH9 is housed in a 5-pin SOT23-5 package with exposed pad for thermal enhancement; GND pin serves dual role as electrical ground and heatsink-requires connection to large copper area for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Accepts +2.5V to +6.5V; requires 1µF ceramic bypass to GND near pin |
| 2 GND | Ground / Thermal Pad | Primary return path and thermal conduction interface-must be soldered to PCB ground plane |
| 3 SHDN | Active-Low Enable | Logic low (<0.4V) disables regulator and reduces IQ to ≤1µA; tie to IN for always-on operation |
| 4 POK | Open-Drain Power-OK | Asserts low when VOUT drops >1% out of regulation; requires external 100kΩ pull-up to OUT |
| 5 OUT | Regulated Output | 3.3V ±1% source up to 150mA; bypass with 1µF ceramic capacitor (ESR <0.2Ω) |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss-ensures 85µA IQ remains constant across load, dropout, and temperature |
| Reverse-battery protection | Limits reverse current to ≤1mA if VIN or SHDN falls below GND-prevents damage during incorrect battery insertion |
| 1µF ceramic capacitor stability | Guaranteed stable operation with 1µF X7R/X5R output cap (ESR <0.2Ω)-reduces BOM count and board space vs. tantalum alternatives |
| Power-OK with POR capability | POK asserts low during dropout/overload/thermal fault-and functions as power-on-reset down to VIN ≤1V |
| Thermal shutdown with hysteresis | Shuts down at +170°C and re-enables only after cooling by 20°C-enables safe pulsed operation under sustained overload |
Applications
| Cellular Telephones | PCMCIA Cards |
|---|---|
Use Scenario: Primary 3.3V supply for RF transceiver and baseband processor in GSM/CDMA handsets operating from single Li-ion cell (3.0V–4.2V). IC Role / Device Role / Timing Role: Main LDO delivering regulated 3.3V rail with fast load-transient response to handle burst-mode transmission current spikes. Use Value: 110mV dropout at 100mA allows usable runtime down to 3.41V input-extending talk time beyond competing PNP-based regulators. |
Use Scenario: Local 3.3V power for PCMCIA Type II card logic and interface circuitry in laptops and industrial terminals. IC Role / Device Role / Timing Role: Standalone post-regulator converting noisy 5V system bus to clean 3.3V for card controller and memory. Use Value: 60dB PSRR at 100Hz attenuates switching noise from host DC/DC converters-reducing digital errors and improving data integrity. |
| Modems | Hand-Held Instruments |
Use Scenario: 3.3V supply for V.92/V.90 analog front-end and DSP in external USB or PCI modems. IC Role / Device Role / Timing Role: Low-noise bias source for ADCs, DACs, and op-amps in signal conditioning path. Use Value: 170µVRMS integrated output noise (10Hz–100kHz) ensures high SNR in audio-band analog processing. |
Use Scenario: Power management for portable multimeters, thermal imagers, and handheld spectrum analyzers using dual-cell alkaline or Li-ion batteries. IC Role / Device Role / Timing Role: Always-on supervisor LDO powering real-time clock, microcontroller backup domain, and wake-up comparators. Use Value: 1µA max shutdown current preserves battery charge during multi-week storage-critical for field-deployed test equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8885EUK33-T | Pin-compatible, optimized for higher-ESR (>1Ω) output capacitors (e.g., tantalum); same 3.3V/150mA spec but different compensation | Preferred where ceramic capacitor cost or microphonics are concerns-supports legacy designs using bulkier, higher-ESR caps | Select MAX8885EUK33-T only when 1µF ceramic stability cannot be assured due to dielectric variation or layout constraints |
| MCP1700T-3302E/TT | 3.3V/250mA LDO with 2.0µA IQ, no POK output, SOT23-5 package; dropout 600mV at 250mA | Lacks power-good signaling and reverse-battery protection-requires external supervision circuitry for safety-critical battery systems | Choose MCP1700T-3302E/TT only for cost-sensitive, non-safety-critical applications where POK and reverse protection are omitted |
Compared with MAX8875EUK33/GH9, MAX8885EUK33-T offers identical pinout and function but trades ceramic-capacitor optimization for higher-ESR flexibility, while MCP1700T-3302E/TT sacrifices POK, reverse-battery protection, and ultra-low dropout to achieve lower quiescent current-making it suitable only where those features are unnecessary.
Availability
MAX8875EUK33/GH9 is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, and hand-held instruments requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance over -40°C to +85°C.
Supply support for MAX8875EUK33/GH9 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 battery-powered portable equipment-emphasizing ultra-low quiescent current, small footprint, and robust protection features like reverse-battery tolerance and thermal hysteresis.
FAQ
What is the maximum input voltage rating for MAX8875EUK33/GH9?
The absolute maximum input voltage for MAX8875EUK33/GH9 is +7V relative to GND, but the recommended operating range is +2.5V to +6.5V. Exceeding +6.5V may trigger internal protection or reduce reliability-even if within absolute ratings-so designs must ensure VIN stays within the specified operational window for guaranteed performance and lifetime.
Does MAX8875EUK33/GH9 require an external resistor divider to set its 3.3V output?
No, MAX8875EUK33/GH9 does not require external resistors. Its 3.3V output is factory-trimmed using internal laser-zapped feedback resistors-fully integrated and verified across temperature and load. This eliminates component count, layout sensitivity, and drift associated with external dividers, making MAX8875EUK33/GH9 ideal for space-constrained portable designs.
Can MAX8875EUK33/GH9 be used with a 10µF tantalum output capacitor instead of ceramic?
MAX8875EUK33/GH9 is optimized for 1µF ceramic capacitors (ESR <0.2Ω) and may become unstable with high-ESR tantalum types. For higher-ESR capacitors, Maxim specifies the pin-compatible MAX8885EUK33-T. Using 10µF tantalum with MAX8875EUK33/GH9 risks oscillation or poor transient response-so verify stability via bench testing before deployment.
What happens to the POK output of MAX8875EUK33/GH9 during shutdown?
During shutdown (SHDN = low), the POK output of MAX8875EUK33/GH9 is disabled and enters high-impedance state-it does not assert or de-assert. POK only monitors regulation status when the device is enabled (SHDN = high). Therefore, external logic must interpret SHDN state separately; POK alone cannot indicate enable/disable status of MAX8875EUK33/GH9.
Is reverse-battery protection active on both IN and SHDN pins of MAX8875EUK33/GH9?
Yes, reverse-battery protection in MAX8875EUK33/GH9 actively monitors both IN and SHDN pins. If either falls below GND, internal circuitry disconnects parasitic paths and limits reverse current to ≤1mA-protecting the IC even when battery polarity is reversed at input or enable lines. This dual-pin coverage is confirmed in the Absolute Maximum Ratings and Detailed Description sections of the official datasheet.
MAX8875EUK33/GH9 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):
- 3.3V
- 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
MAX8875EUK33/GH9 FAQ
1.How can I place an order for MAX8875EUK33/GH9 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8875EUK33/GH9 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 MAX8875EUK33/GH9 reliable?
The price and inventory of MAX8875EUK33/GH9 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8875EUK33/GH9 is usually 5 days.
3.What payment methods are accepted for MAX8875EUK33/GH9?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8875EUK33/GH9 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8875EUK33/GH9?
MAX8875EUK33/GH9 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8875EUK33/GH9 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 MAX8875EUK33/GH9?
For technical support, including MAX8875EUK33/GH9 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8875EUK33/GH9 requirements.
6.How does Aetrix verify that MAX8875EUK33/GH9 is sourced from the original manufacturer or authorized distributors?
All MAX8875EUK33/GH9 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 MAX8875EUK33/GH9 meets industry standards.
7.What is the process for return or replacement of MAX8875EUK33/GH9?
All MAX8875EUK33/GH9 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8875EUK33/GH9, 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 MAX8875EUK33/GH9 part is unused and in its original packaging.
Return procedure for MAX8875EUK33/GH9:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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