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Analog Devices Inc./Maxim Integrated MAX8863TEUK-T
- Part No.:
- MAX8863TEUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8863TEUK-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:9,658
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Product details
Overview
MAX8863TEUK-T from Maxim Integrated is a low-dropout linear regulator with PMOS pass transistor, delivering up to 120mA at a fixed 3.15V output. It operates from +2.5V to +6.5V input, features 55mV dropout at 50mA, 80µA operating supply current independent of load, and 350µVRMS output noise - ideal for battery-powered portable devices including cellular phones and modems.
For engineers reviewing the MAX8863TEUK-T datasheet, MAX8863TEUK-T pinout, MAX8863TEUK-T application, or MAX8863TEUK-T equivalent, key selection criteria include its Dual Mode™ operation (fixed/adjustable), reverse battery protection, thermal shutdown at 170°C, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX8863TEUK-T uses an internal 1.25V bandgap reference and error amplifier to regulate output via a 1.1Ω typical p-channel MOSFET pass transistor. Its Dual Mode™ comparator selects feedback path based on SET pin voltage: below 60mV enables internal fixed-voltage regulation (3.15V), while external resistor divider enables adjustable 1.25V–6.5V output.
Shutdown logic disables all internal circuitry including reference and bias networks, reducing supply current to 0.1nA; the MAX8864 variant adds active output discharge, but MAX8863TEUK-T does not implement this function. Thermal protection triggers at +170°C junction temperature with 20°C hysteresis, enabling pulsed recovery under sustained overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.15V (±100mV over -40°C to +85°C), enabling direct replacement of 3.3V LDOs where tighter tolerance is acceptable. |
| Dropout Voltage | 55mV at 50mA load, allowing operation down to VIN = 3.205V while maintaining regulation - extends usable battery life in Li-ion and alkaline systems. |
| Supply Current | 80µA operating (load-independent), ensuring minimal quiescent drain during standby or light-load conditions in always-on subsystems. |
| Output Noise | 350µVRMS (10Hz–1MHz), suitable for powering analog circuits such as 12-bit ADCs without additional filtering. |
| Input Voltage Range | +2.5V to +6.5V, supporting single-cell Li-ion (2.7–4.2V), dual-cell alkaline (3–6V), and regulated 5V rail inputs. |
| Thermal Shutdown | Triggers at +170°C junction temperature with 20°C hysteresis, providing fail-safe protection during sustained overload or poor PCB thermal design. |
| Reverse Battery Protection | Limits reverse supply current to <1mA when VIN or SHDN falls below GND, preventing battery damage and IC overheating in miswired installations. |
Pinout & Package
MAX8863TEUK-T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+1, outline 21-0057). The GND pin serves dual role as electrical ground and thermal heatsink - requires connection to large copper area or ground plane for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low shutdown control | Logic low disables regulator and reduces supply current to 0.1nA; connect to IN for normal operation; no auto-discharge function (MAX8864 exclusive). |
| 2 - GND | Ground reference and thermal path | Primary return path for all currents; soldered to PCB ground plane to maximize heat transfer and stabilize regulation under load. |
| 3 - IN | Regulator input supply | Accepts +2.5V to +6.5V; requires ≥1µF bypass capacitor to GND near pin for stability and transient suppression. |
| 4 - OUT | Regulated output | Delivers up to 120mA at 3.15V; requires ≥1µF, <0.2Ω ESR ceramic capacitor to GND for loop stability across temperature and load. |
| 5 - SET | Feedback mode selection | Connected to GND to enable fixed 3.15V output; floating or >60mV disables internal divider and enables external resistor adjustment. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ operation | Single-pin (SET) selection between factory-trimmed 3.15V output or externally adjustable 1.25V–6.5V range - eliminates BOM variants for multiple voltage requirements. |
| P-channel MOSFET pass element | 1.1Ω typical RDS(ON) enables ultra-low dropout and eliminates base-drive current - maintains 80µA quiescent current regardless of load or dropout condition. |
| Reverse battery protection | Hardware-level polarity detection disconnects internal circuitry when VIN or SHDN goes negative - prevents >1mA reverse current without external diodes or FETs. |
| Thermal shutdown with hysteresis | 170°C trip point + 20°C cooldown delay ensures safe intermittent operation during temporary overload, avoiding latch-up or permanent damage. |
| Low-noise regulation | 350µVRMS integrated noise (10Hz–1MHz) meets power integrity requirements for precision analog signal chains without added LC filtering. |
Applications
| Cellular Telephones | Cordless Telephones |
|---|---|
|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O supplies in compact handsets with single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary 3.15V LDO supplying noise-sensitive RF sections, replacing higher-quiescent alternatives to extend talk time. Use Value: 55mV dropout preserves usable battery voltage down to 3.205V, while 350µVRMS noise avoids degradation of receiver sensitivity and adjacent-channel rejection. |
Use Scenario: Regulating power for digital cordless phone base station microcontrollers and audio codec interfaces. IC Role / Device Role / Timing Role: Fixed-output LDO delivering stable 3.15V to MCU core and peripheral I/O, co-located with high-speed digital logic. Use Value: 80µA load-independent quiescent current minimizes standby power draw during idle periods, directly improving battery life in rechargeable base units. |
| Modems | Palmtop Computers |
|
Use Scenario: Providing clean 3.15V supply to DSL or cable modem PHY layer ICs and serial interface transceivers. IC Role / Device Role / Timing Role: Low-noise post-regulator for communication ICs requiring tight voltage accuracy and high PSRR at low frequencies. Use Value: 62dB PSRR at DC–300Hz suppresses ripple from upstream switching converters, preventing bit errors in high-speed data transmission. |
Use Scenario: Powering LCD controller, flash memory, and real-time clock circuits in handheld PDAs with limited board area. IC Role / Device Role / Timing Role: Space-optimized SOT23-5 LDO delivering regulated 3.15V to mixed-signal subsystems with minimal external components. Use Value: Miniature footprint and single 1µF input/output capacitor requirement reduce total solution size by >40% versus legacy TO-92 or SO-8 LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76333DBVR | Fixed 3.3V output, 150mA rating, 120mV dropout at 50mA, 85µA quiescent current, no reverse battery protection. | Higher output voltage tolerance (±2%) vs. MAX8863TEUK-T's ±100mV; lacks reverse polarity hardening for field-replaceable battery compartments. | Select when 3.3V nominal is required and reverse battery risk is mitigated by system-level design; verify noise and PSRR meet analog signal chain needs. |
| MCP1700T-3302E/TT | Fixed 3.3V output, 250mA rating, 178mV dropout at 250mA, 1.6µA quiescent current, no thermal shutdown or reverse battery protection. | Ultra-low quiescent current ideal for energy-harvesting or coin-cell applications; lacks overtemperature and reverse-polarity safeguards present in MAX8863TEUK-T. | Prefer for ultra-low-power sleep modes where thermal stress and battery reversal are not concerns; avoid in mains-powered or hot-environment deployments. |
Compared with TPS76333DBVR and MCP1700T-3302E/TT, the MAX8863TEUK-T uniquely combines reverse battery protection, thermal shutdown, and 350µVRMS noise in a 120mA SOT23-5 package - making it optimal for ruggedized portable equipment where reliability under fault conditions is critical.
Availability
MAX8863TEUK-T is available at Aetrix Electronics and suitable for cellular telephones, cordless telephones, and modems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX8863TEUK-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 MAX8863 series targets battery-powered portable electronics, emphasizing ultra-low quiescent current, reverse-battery resilience, and miniature packaging - addressing design constraints in space- and energy-limited handheld devices.
FAQ
What is the output voltage tolerance of the MAX8863TEUK-T over temperature?
The MAX8863TEUK-T delivers a nominal 3.15V output with ±100mV tolerance across the full -40°C to +85°C operating range. This corresponds to ±3.2% accuracy at room temperature and remains stable due to internal laser-trimmed feedback resistors - sufficient for powering 3.3V logic with margin, but not for precision analog references requiring tighter regulation.
Does the MAX8863TEUK-T support adjustable output voltage?
Yes, the MAX8863TEUK-T supports adjustable output via its SET pin. When the SET pin is disconnected from GND and connected to an external resistor divider, the output becomes programmable from 1.25V to 6.5V using VOUT = 1.25V × (1 + R1/R2). However, the MAX8863TEUK-T is the T-version variant, so its default fixed output is 3.15V when SET = GND.
What is the minimum input voltage required for regulation at full load?
At 50mA load, the MAX8863TEUK-T requires VIN ≥ VOUT + 55mV = 3.205V to maintain regulation. At 120mA, dropout increases proportionally with RDS(ON); typical dropout reaches ~120mV, requiring VIN ≥ 3.27V. Below these thresholds, the device enters dropout and output tracks VIN minus RDS(ON) × ILOAD.
How does the MAX8863TEUK-T handle reverse battery connection?
The MAX8863TEUK-T incorporates dedicated reverse battery protection circuitry that detects negative voltage on IN or SHDN and disconnects internal paths, limiting reverse current to <1mA. This prevents battery discharge, IC overheating, and potential damage - eliminating need for external blocking diodes in consumer battery compartments.
Is the MAX8863TEUK-T pin-compatible with the MAX8864TEUK-T?
No, the MAX8863TEUK-T is not pin-compatible with the MAX8864TEUK-T in functional terms. While both share identical SOT23-5 pinout and pin functions, the MAX8864TEUK-T includes active output discharge during shutdown - a feature absent in MAX8863TEUK-T. Swapping them may cause unintended output behavior during shutdown sequences.
MAX8863TEUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 1.25V (3.15V)
- Voltage - Output (Max):
- 6.5V
- Voltage Dropout (Max):
- 0.12V @ 50mA
- Current - Output:
- 120mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 80 µA
- PSRR:
- 62dB (300Hz)
- Control Features:
- Enable
- 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
MAX8863TEUK-T FAQ
1.How can I place an order for MAX8863TEUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8863TEUK-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 MAX8863TEUK-T reliable?
The price and inventory of MAX8863TEUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8863TEUK-T is usually 5 days.
3.What payment methods are accepted for MAX8863TEUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8863TEUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8863TEUK-T?
MAX8863TEUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8863TEUK-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 MAX8863TEUK-T?
For technical support, including MAX8863TEUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8863TEUK-T requirements.
6.How does Aetrix verify that MAX8863TEUK-T is sourced from the original manufacturer or authorized distributors?
All MAX8863TEUK-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 MAX8863TEUK-T meets industry standards.
7.What is the process for return or replacement of MAX8863TEUK-T?
All MAX8863TEUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8863TEUK-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 MAX8863TEUK-T part is unused and in its original packaging.
Return procedure for MAX8863TEUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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