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Analog Devices Inc./Maxim Integrated MAX8891EXK89+T
- Part No.:
- MAX8891EXK89+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX8891EXK89+T.pdf
- Description:
- IC REG LINEAR 2.9V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,298
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Product details
Overview
MAX8891EXK89+T from Maxim Integrated is a fixed-output, low-dropout linear regulator delivering 2.9V 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 such as Bluetooth radios and digital cameras.
For engineers reviewing the MAX8891EXK89+T datasheet, MAX8891EXK89+T pinout, MAX8891EXK89+T application, or MAX8891EXK89+T equivalent, key selection criteria include guaranteed 150mA output capability, SC70-5 package footprint, 1µF ceramic capacitor stability, shutdown current <1µA, and factory-preset 2.9V output without external feedback components.
Technical Context
The MAX8891EXK89+T uses an internal p-channel MOSFET pass transistor (RDS(ON) ≈ 1Ω) to achieve low dropout and minimal ground current across load and temperature. Its bandgap reference (1.225V) feeds an error amplifier that controls gate drive to maintain regulation without base-drive losses typical of PNP-based LDOs.
It operates over 2V–6V input range and guarantees ±3% output voltage accuracy from -40°C to +85°C. Shutdown logic disables the reference, error amplifier, and pass transistor, 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 2.9V ±3% - factory-trimmed; eliminates need for external resistors or calibration in production. |
| Max Output Current | 150mA continuous - supports moderate-power RF ICs and microcontrollers without thermal derating under typical PCB layout. |
| Dropout Voltage | 120mV at 120mA - enables operation down to ~3.02V input when powering 2.9V loads, extending usable battery life in single-cell Li-ion systems. |
| Ground Current | 40µA at light load - minimizes quiescent drain during standby, critical for always-on sensor nodes and portable audio. |
| PSRR | 65dB at 10kHz - suppresses switching noise from DC/DC converters upstream, improving signal integrity in mixed-signal subsystems. |
| Capacitor Requirement | Stable with 1µF ceramic on IN and OUT - reduces BOM count and PCB area vs. traditional LDOs requiring ≥10µF tantalum. |
| Shutdown Current | <0.05µA at +85°C - ensures negligible battery leakage during long-term storage or deep sleep modes. |
Pinout & Package
MAX8891EXK89+T is housed in a 5-pin SC70 package (2.0mm × 1.25mm × 0.9mm), optimized for ultra-compact layouts. The GND pin serves dual electrical and thermal functions - must be connected to a large copper pour for effective heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Unregulated Input Supply | Accepts 2V–6V input; requires 1µF ceramic bypass to GND for stability and line-transient suppression. |
| 2 - GND | Ground Reference & Thermal Path | Primary return path and main thermal conduction route; must connect to PCB ground plane for θJA = 324°C/W performance. |
| 3 - SHDN | Active-Low Enable Control | Pull ≤0.4V to disable regulator; pulls high to IN for default-on operation; draws <0.01µA bias current. |
| 4 - N.C. | No Internal Connection | Not bonded; electrically isolated - no routing or soldering required; avoids accidental shorts in dense layouts. |
| 5 - OUT | Regulated 2.9V Output | Delivers up to 150mA; bypassed with 1µF ceramic to GND; enters high-Z state during shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| SC70-5 footprint | 2.0mm × 1.25mm body size - saves >60% board area vs. SOT-23, enabling placement near noise-sensitive analog ICs. |
| 1µF ceramic stability | Guaranteed stable with 1µF X5R/X7R capacitors across full temperature and load range - eliminates ESR tuning and capacitor qualification overhead. |
| Thermal & overcurrent protection | Auto-recovering shutdown at 160°C junction temp with 10°C hysteresis; 200mA current limit prevents damage during sustained short-circuit events. |
| Low-noise operation | 230µV RMS output noise (100Hz–100kHz) - suitable for powering ADC references and RF synthesizer VCO supplies without added filtering. |
| Fast transient response | Load step recovery within 20µs (5mA/μs edge) and line step recovery within 40μs - maintains regulation during processor core voltage bursts. |
Applications
| Bluetooth Portable Radio | Digital Camera Sensor Power |
|---|---|
|
Use Scenario: Powers Bluetooth baseband IC and RF transceiver in compact wireless headsets and speakerphones. IC Role / Device Role / Timing Role: Primary 2.9V supply rail for low-power radio SoC with tight noise and transient requirements. Use Value: 65dB PSRR rejects switching noise from adjacent DC/DC converters; 120mV dropout extends talk time by enabling use of battery voltage down to 3.02V. |
Use Scenario: Supplies image sensor and ISP core logic in consumer-grade digital cameras and action cams. IC Role / Device Role / Timing Role: Clean, stable 2.9V bias for analog front-end and pixel readout circuitry. Use Value: 230µV RMS noise prevents fixed-pattern noise in captured images; 1µF ceramic compatibility simplifies layout in multi-layer sensor modules. |
| Portable Audio DAC | Industrial Handheld Terminal |
|
Use Scenario: Powers stereo DAC and headphone amplifier in battery-operated personal stereos and portable media players. IC Role / Device Role / Timing Role: Low-noise analog supply for audio signal chain, decoupled from noisy digital rails. Use Value: 40µA ground current preserves battery runtime during playback pauses; fast load transient response prevents pop/click artifacts during volume changes. |
Use Scenario: Provides regulated 2.9V for MCU, display driver, and barcode scanner ASIC in rugged handheld terminals. IC Role / Device Role / Timing Role: Main system power rail supporting intermittent high-current bursts during scanning and wireless transmission. Use Value: 150mA rating handles peak loads without dropout; thermal shutdown protects against enclosure overheating in sealed industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P292MR | 2.9V fixed, 150mA, 250mV dropout at 100mA, 1µF stable, SC70-5 | Higher dropout limits usable input range; lower PSRR (55dB @ 10kHz) reduces noise rejection | Select when cost sensitivity outweighs PSRR and dropout performance; verify thermal margin at 150mA in target layout. |
| Richtek RT9193-29GB | 2.9V fixed, 300mA, 200mV dropout at 150mA, 1µF stable, SOT-23-5 | Larger SOT-23-5 footprint increases PCB area; higher current rating unnecessary for 150mA use cases | Choose only if future design scaling to >150mA is certain; SC70-5 area savings of MAX8891EXK89+T remain advantageous for miniaturized designs. |
Compared with XC6206P292MR and RT9193-29GB, the MAX8891EXK89+T delivers superior dropout (120mV vs. ≥200mV) and PSRR (65dB vs. ≤55dB), enabling longer battery life and cleaner analog performance in space-constrained portable devices - without increasing footprint or BOM complexity.
Availability
MAX8891EXK89+T is available at Aetrix Electronics and suitable for Bluetooth portable radios, digital camera sensor power, portable audio DACs, and industrial handheld terminals requiring stable component supply, RoHS-compliant packaging, and guaranteed -40°C to +85°C operation.
Supply support for MAX8891EXK89+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 series was designed specifically for ultra-compact, battery-powered portable electronics demanding low quiescent current, small-footprint packaging, and robust transient performance - targeting cellular accessories, wearables, and imaging modules.
FAQ
What is the exact output voltage of the MAX8891EXK89+T?
The MAX8891EXK89+T is factory-trimmed to deliver a precise 2.9V output voltage with ±3% tolerance across -40°C to +85°C and 100μA–80mA load current. This value is confirmed in the Output Voltage Selector Guide and Electrical Characteristics table of the official datasheet, where "89" in the part number explicitly denotes the 2.9V variant (top mark ATV).
Does the MAX8891EXK89+T require external feedback resistors?
No, the MAX8891EXK89+T does not require external feedback resistors. It is a fixed-output variant of the MAX8891 family with internal resistor divider set for 2.9V. Unlike the adjustable MAX8892, the MAX8891EXK89+T uses pin 4 as N.C. (not internally connected), eliminating layout complexity and resistor tolerance errors associated with external feedback networks.
What is the minimum input voltage needed for regulation with the MAX8891EXK89+T?
The minimum input voltage for regulation is determined by dropout: VIN(min) = VOUT + VDO. At 120mA load, the MAX8891EXK89+T exhibits 120mV dropout, so VIN must be ≥3.02V to sustain 2.9V output. At lighter loads, dropout decreases - e.g., ~50mV at 20mA - allowing operation down to ~2.95V input while maintaining regulation.
Can the MAX8891EXK89+T be used with X5R ceramic capacitors?
Yes, the MAX8891EXK89+T is fully stable with 1µF X5R ceramic capacitors on both input and output across its entire operating temperature range (-40°C to +85°C). The datasheet explicitly confirms X5R/X7R dielectrics meet stability requirements without ESR compensation, unlike Z5U/Y5V types which may require ≥2.2µF below -10°C.
How does the shutdown function behave on the MAX8891EXK89+T?
When SHDN is pulled low (<0.4V), the MAX8891EXK89+T disables its bandgap reference, error amplifier, and pass transistor, reducing supply current to <0.05µA at +85°C. The output enters a high-impedance state - no current flows into or out of the OUT pin - enabling safe power sequencing and isolation of downstream circuitry during system sleep.
MAX8891EXK89+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):
- 2.9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.135V @ 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
MAX8891EXK89+T FAQ
1.How can I place an order for MAX8891EXK89+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8891EXK89+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 MAX8891EXK89+T reliable?
The price and inventory of MAX8891EXK89+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8891EXK89+T is usually 5 days.
3.What payment methods are accepted for MAX8891EXK89+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8891EXK89+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8891EXK89+T?
MAX8891EXK89+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8891EXK89+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 MAX8891EXK89+T?
For technical support, including MAX8891EXK89+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8891EXK89+T requirements.
6.How does Aetrix verify that MAX8891EXK89+T is sourced from the original manufacturer or authorized distributors?
All MAX8891EXK89+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 MAX8891EXK89+T meets industry standards.
7.What is the process for return or replacement of MAX8891EXK89+T?
All MAX8891EXK89+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8891EXK89+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 MAX8891EXK89+T part is unused and in its original packaging.
Return procedure for MAX8891EXK89+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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