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Analog Devices Inc./Maxim Integrated MAX8891EXK35+T
- Part No.:
- MAX8891EXK35+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX8891EXK35+T.pdf
- Description:
- IC REG LINEAR 3.5V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,990
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Product details
Overview
MAX8891EXK35+T from Maxim Integrated is a fixed-output, low-dropout linear regulator delivering 3.5V at up to 150mA with 120mV dropout at 120mA load, 40µA ground current, and 65dB PSRR at 10kHz - designed for space-constrained battery-powered systems requiring stable low-noise voltage regulation.
For engineers reviewing the MAX8891EXK35+T datasheet, MAX8891EXK35+T pinout, MAX8891EXK35+T application, or MAX8891EXK35+T equivalent, key selection criteria include guaranteed 150mA output capability, SC70-5 package footprint, 1µF ceramic capacitor stability, thermal/overcurrent protection, and shutdown current <1µA - all critical for portable electronics power design.
Technical Context
The MAX8891EXK35+T employs a p-channel MOSFET series pass transistor (RDS(ON) ≈ 1Ω) enabling ultra-low ground current (40µA typical) and minimal dropout without base-drive losses. Its bandgap reference (1.225V) feeds an error amplifier that controls gate drive to maintain ±3% output accuracy across load (100μA–80mA) and temperature (−40°C to +85°C).
Stability is achieved with only 1µF input and output ceramic capacitors (X7R/X5R), supported by internal compensation. Shutdown logic disables the reference, error amp, and gate driver, reducing supply current to <0.05µA at +85°C while placing OUT in high-impedance state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.5V ±3% - factory-trimmed for precision without external feedback components. |
| Max Output Current | 150mA continuous - sufficient for RF transceivers, microcontrollers, and sensor subsystems. |
| Dropout Voltage | 120mV at 120mA - enables operation down to VIN = 3.62V, extending usable battery life in single-cell Li-ion or 3×AA systems. |
| Ground Current | 40µA at light load - minimizes quiescent power loss during standby or sleep modes. |
| PSRR | 65dB at 10kHz - suppresses switching noise from DC-DC converters feeding the LDO input. |
| Shutdown Current | <0.05µA at +85°C - ensures negligible battery drain during system off-state. |
| Capacitor Requirement | Stable with 1µF X7R/X5R ceramic on IN and OUT - eliminates need for large tantalum or electrolytic capacitors. |
Pinout & Package
MAX8891EXK35+T is housed in a 5-pin SC70 package (2.0mm × 1.25mm, 0.65mm pitch), optimized for minimal PCB area and thermal performance via GND pad conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Unregulated Input Supply | Accepts 2V to 6V input; requires 1µF ceramic bypass to GND for noise filtering and transient response. |
| 2 - GND | Ground Reference & Thermal Path | Primary return path and main heat dissipation channel; must connect to large copper area or ground plane. |
| 3 - SHDN | Active-Low Shutdown Control | Pull ≤0.4V to disable regulator; draws ≤0.01µA bias current; tie to IN for always-on operation. |
| 4 - N.C. | No Internal Connection | Not bonded internally; leave unconnected - no routing or pull-up/pull-down required. |
| 5 - OUT | Regulated 3.5V Output | Delivers up to 150mA; bypass with 1µF ceramic to GND; enters high-Z state when SHDN is asserted. |
Key Features
| Feature | Design Value |
|---|---|
| SC70-5 footprint | 2.0mm × 1.25mm package - reduces board area by >50% vs. SOT-23, ideal for ultra-compact handhelds. |
| 1µF ceramic stability | Guaranteed stability with 1µF X7R/X5R capacitors across full load and temperature - simplifies BOM and layout. |
| Thermal + overcurrent protection | Auto-recovering shutdown at 160°C junction temp and 200mA current limit - prevents damage during fault conditions. |
| Low-noise output | 230µV RMS noise (100Hz–100kHz) - suitable for noise-sensitive analog circuits like ADCs and RF front-ends. |
| Fast transient response | Load step recovery within 20µs (5mA/μs slew) - maintains regulation during processor core wake-up or radio transmit bursts. |
Applications
| Bluetooth Portable Radios | Digital Cameras |
|---|---|
|
Use Scenario: Powering Bluetooth baseband IC and RF transceiver in compact wireless headsets and speakerphones. IC Role / Device Role / Timing Role: Primary 3.5V supply for digital baseband and analog RF sections, replacing bulkier regulators. Use Value: 120mV dropout extends battery runtime in single-cell Li-ion systems; 65dB PSRR isolates sensitive RF circuitry from noisy DC-DC sources. |
Use Scenario: Supplying image sensor interface, ISP, and LCD backlight controller in pocket-sized digital cameras. IC Role / Device Role / Timing Role: Low-noise 3.5V rail for analog sensor signal chain and timing-critical image processing blocks. Use Value: 230µV RMS output noise prevents fixed-pattern noise in captured images; 1µF capacitor compatibility reduces component count and cost. |
| Personal Stereos | Portable Medical Sensors |
|
Use Scenario: Regulating audio codec, DAC, and headphone amplifier in battery-powered MP3 players and wireless earbuds. IC Role / Device Role / Timing Role: Clean 3.5V supply for audio signal path, minimizing THD+N degradation in playback. Use Value: 40µA ground current preserves battery life during extended playback; fast load transient response prevents audible pop/click during volume changes. |
Use Scenario: Providing stable 3.5V bias for ECG/PPG analog front-end, MCU, and BLE radio in wearable health monitors. IC Role / Device Role / Timing Role: Safety-critical power rail with thermal/overcurrent protection and guaranteed 150mA delivery under varying sensor loads. Use Value: Shutdown current <0.05µA enables multi-year battery life in always-on monitoring mode; ±3% accuracy ensures consistent sensor calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P352MR | 3.5V fixed, 150mA, 250mV dropout at 100mA, 1µA quiescent current, SOT-25 package (2.9mm × 2.8mm) | Larger footprint and higher dropout reduce battery efficiency in deep-discharge scenarios. | Choose when legacy SOT-25 layout exists and 120mV dropout is not required. |
| Diodes Inc. AP2112K-3.5TRG1 | 3.5V fixed, 600mA, 350mV dropout at 300mA, 60µA quiescent current, SOT-25 package | Higher current rating and larger package unnecessary for 150mA applications; higher ground current increases standby loss. | Choose only if future design scaling to >300mA is certain and board space allows SOT-25. |
Compared with XC6206P352MR and AP2112K-3.5TRG1, the MAX8891EXK35+T delivers superior battery efficiency via its 120mV dropout and 40µA ground current in the smallest SC70-5 footprint - making it optimal for size- and runtime-constrained portable devices where 150mA capacity is sufficient.
Availability
MAX8891EXK35+T is available at Aetrix Electronics and suitable for Bluetooth portable radios, digital cameras, personal stereos, portable medical sensors, and other battery-powered equipment requiring stable component supply with tight voltage tolerance and ultra-low quiescent current.
Supply support for MAX8891EXK35+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 MAX8891/MAX8892 family was engineered specifically for space-constrained, battery-operated portable electronics - prioritizing ultra-low quiescent current, minimal dropout, small-footprint packaging, and ceramic-capacitor compatibility without sacrificing protection or accuracy.
FAQ
What is the output voltage tolerance of the MAX8891EXK35+T over temperature and load?
The MAX8891EXK35+T guarantees ±3% output voltage accuracy across load current (100μA to 80mA) and temperature (−40°C to +85°C). At +25°C, typical deviation is within ±0.2%, and the device maintains this stability due to its trimmed 1.225V bandgap reference and internal feedback divider. This ensures reliable operation for precision analog circuits powered by the MAX8891EXK35+T.
Does the MAX8891EXK35+T require an external feedback resistor network?
No, the MAX8891EXK35+T does not require external feedback resistors. It is a fixed-output variant with factory-trimmed 3.5V regulation implemented using an internal resistor divider. Unlike the adjustable MAX8892, the MAX8891EXK35+T uses pins 1–5 in SC70 configuration with pin 4 designated as N.C., eliminating component count and layout complexity - a key advantage of the MAX8891EXK35+T.
Can the MAX8891EXK35+T operate with input voltages below 3.5V?
No - the MAX8891EXK35+T requires a minimum input voltage of 2V, but to maintain regulation at 3.5V output, VIN must exceed VOUT by at least the dropout voltage. At 120mA load, dropout is 120mV, so VIN must be ≥3.62V. Below this, the device enters dropout and output drops linearly with VIN. This behavior is fully characterized and specified for the MAX8891EXK35+T in its electrical characteristics table.
What thermal protection features does the MAX8891EXK35+T include?
The MAX8891EXK35+T integrates thermal-overload protection that disables the pass transistor when junction temperature exceeds +160°C. After shutdown, the device remains off until temperature falls by 10°C (hysteresis), then resumes regulation. This auto-recovering behavior prevents permanent damage during sustained overload or poor PCB thermal design - a built-in safeguard confirmed in the MAX8891EXK35+T datasheet's Absolute Maximum Ratings and Detailed Description sections.
Is the MAX8891EXK35+T RoHS-compliant and lead-free?
Yes, the "+T" suffix in MAX8891EXK35+T explicitly denotes a lead(Pb)-free and RoHS-compliant package per Maxim Integrated's ordering nomenclature. The device uses a standard SC70-5 package with NiPdAu lead finish and complies with JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), supporting standard reflow soldering profiles up to +260°C peak temperature - verified in the Package Information section of the MAX8891EXK35+T datasheet.
MAX8891EXK35+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.12V @ 120mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 40 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
MAX8891EXK35+T FAQ
1.How can I place an order for MAX8891EXK35+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8891EXK35+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 MAX8891EXK35+T reliable?
The price and inventory of MAX8891EXK35+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8891EXK35+T is usually 5 days.
3.What payment methods are accepted for MAX8891EXK35+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8891EXK35+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8891EXK35+T?
MAX8891EXK35+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8891EXK35+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 MAX8891EXK35+T?
For technical support, including MAX8891EXK35+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8891EXK35+T requirements.
6.How does Aetrix verify that MAX8891EXK35+T is sourced from the original manufacturer or authorized distributors?
All MAX8891EXK35+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 MAX8891EXK35+T meets industry standards.
7.What is the process for return or replacement of MAX8891EXK35+T?
All MAX8891EXK35+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8891EXK35+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 MAX8891EXK35+T part is unused and in its original packaging.
Return procedure for MAX8891EXK35+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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