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onsemi MAX8863SEUK-T
- Part No.:
- MAX8863SEUK-T
- Manufacturer:
- onsemi
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8863SEUK-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:27,500
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Product details
Overview
MAX8863SEUK-T from ON Semiconductor is a fixed-output, low-dropout linear regulator delivering up to 120 mA with a preset 2.84 V output, 55 mV dropout at 50 mA, and 50 µA quiescent current - designed for battery-powered portable electronics including cellular handsets and PCMCIA cards.
For engineers reviewing the MAX8863SEUK-T datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage under load, shutdown current (0.002 µA typ.), thermal shutdown threshold (170°C), and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX8863SEUK-T integrates a 1.20 V bandgap reference, error amplifier, MOSFET driver, and P-channel pass transistor to regulate output precisely. Its internal feedback divider fixes VOUT at 2.84 V, eliminating external resistor networks.
Shutdown is controlled via active-low SHDN pin, enabling <0.1 nA supply current and active output discharge. Thermal protection triggers at 170°C with 20°C hysteresis, and current limiting operates at 280 mA (design range: 150–410 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.84 V ±50 mV over full temperature and load range - ensures stable core logic or RF bias rail without trimming. |
| Max Output Current | 120 mA continuous - supports moderate-power baseband ICs or sensor subsystems in handheld devices. |
| Dropout Voltage | 55 mV at 50 mA - extends usable battery life down to ~2.89 V input for Li-ion cells near end-of-discharge. |
| Quiescent Current | 50 µA (in regulation), 0.002 µA typ. in shutdown - minimizes standby drain in always-on subsystems. |
| PSRR | 62 dB at low frequency, rolling off above 300 Hz - suppresses switching noise from adjacent DC/DC converters. |
| Output Noise | 350 µVRMS (10 Hz–1 MHz) - suitable for powering analog front-ends or ADC reference supplies requiring low noise. |
| Thermal Shutdown | 170°C junction temperature with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
SOT-23-5 package (Case 1212), 2.80 mm × 2.50 mm footprint, with exposed GND pad for thermal dissipation. Pin 2 and Pin 5 are both GND - one serves as primary ground, the other as thermal pad connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable control | Pulls regulator into ultra-low-current shutdown (<0.1 nA); actively discharges OUT to GND when asserted. |
| 2 - GND | Power ground / thermal sink | Primary ground return path; must be soldered to large copper area to maintain TJ ≤ +150°C at full load. |
| 3 - IN | Input supply rail | Accepts 2.5 V to 6.0 V; requires ≥1 µF ceramic bypass capacitor close to pin for stability. |
| 4 - OUT | Regulated output | Delivers up to 120 mA; requires ≥1 µF ceramic output capacitor with ≤1 Ω ESR for transient response and stability. |
| 5 - GND | Secondary ground / thermal pad | Connected internally to die substrate; enhances thermal conduction when soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with any capacitor type | Eliminates ESR dependency - enables use of low-cost aluminum or tantalum caps where ceramic is unavailable. |
| Low-noise output | 350 µVRMS noise floor supports high-resolution ADCs and sensitive RF circuitry without added filtering. |
| Fast turn-on settling | 140 µsec typical time to settle within 2% of final VOUT after SHDN release - critical for burst-mode power management. |
| Internal current limit | 280 mA hard limit protects against short-circuit faults while allowing safe operation up to 120 mA continuous. |
| Thermal hysteresis | 20°C gap between shutdown activation (170°C) and recovery (150°C) prevents oscillation during thermal stress. |
Applications
| Cordless Telephones | PCMCIA Cards |
|---|---|
Use Scenario: Powering RF transceiver and baseband processor in 900 MHz DECT handsets with single-cell Li-ion input. IC Role / Device Role / Timing Role: Primary LDO supplying 2.84 V to analog front-end and digital logic blocks. Use Value: 55 mV dropout preserves operating time below 3.0 V input; 50 µA quiescent current extends standby duration. | Use Scenario: Regulating 3.3 V bus down to 2.84 V for SmartCard interface controller on Type II PCMCIA adapter. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating card logic from host bus noise. Use Value: 62 dB PSRR attenuates host-side switching noise; fast 140 µsec wake-up enables instant card insertion detection. |
| Modems | Hand-Held Instruments |
Use Scenario: Providing clean 2.84 V supply to DSP and line-driver ICs in embedded V.92 dial-up modems. IC Role / Device Role / Timing Role: Low-noise analog rail generator for signal conditioning circuitry. Use Value: 350 µVRMS output noise avoids SNR degradation in audio-band analog paths; thermal shutdown prevents overheating during extended data sessions. | Use Scenario: Powering microcontroller, LCD driver, and precision ADC in portable multimeter with coin-cell backup. IC Role / Device Role / Timing Role: Main system regulator enabling low-power sleep modes and rapid wake-up. Use Value: 0.002 µA shutdown current minimizes battery drain during storage; SOT-23-5 footprint fits tight board real estate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76328DBVR | 2.8 V output (±2%), 150 mA max, 125 µA IQ, SOT-23-5 package | Higher quiescent current reduces battery life in ultra-low-power standby; no active output discharge in shutdown | Select when higher output current margin is needed and shutdown discharge is not required. |
| MCP1702T-2802E/MB | 2.8 V output (±1%), 250 mA max, 4 µA IQ, SOT-23-5 package | Lower IQ improves long-term battery hold-up; no thermal shutdown or current limit protection | Select for energy-harvesting or coin-cell applications where protection features are secondary to ultra-low IQ. |
Compared with TPS76328DBVR and MCP1702T-2802E/MB, the MAX8863SEUK-T uniquely combines active output discharge, thermal hysteresis, and 55 mV dropout at 50 mA - making it optimal for thermally constrained, battery-critical portable designs requiring robust fault handling.
Availability
MAX8863SEUK-T is available at Aetrix Electronics and suitable for cordless telephones, PCMCIA cards, and handheld instruments requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for MAX8863SEUK-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
ON Semiconductor is a global semiconductor supplier delivering energy-efficient, high-performance silicon solutions for automotive, industrial, cloud computing, and portable electronics markets.
The MAX8863 series was developed specifically for portable battery-operated equipment - emphasizing ultra-low quiescent current, small footprint, and robust thermal/overcurrent protection in SOT-23-5 packaging.
FAQ
What is the exact output voltage tolerance of the MAX8863SEUK-T across temperature and load?
The MAX8863SEUK-T delivers a nominal 2.84 V output with a guaranteed tolerance of ±0.09 V (±3.2%) over the full –40°C to +85°C operating temperature range and 0–50 mA load current, per the datasheet's Electrical Characteristics table. This specification ensures reliable operation for 2.8 V logic rails without external trimming or calibration.
Does the MAX8863SEUK-T require an external capacitor on the SHDN pin for stable operation?
No, the MAX8863SEUK-T does not require an external capacitor on the SHDN pin. The shutdown input has only 50 nA bias current and is TTL/CMOS compatible; it functions reliably with direct connection to a microcontroller GPIO or pull-up resistor. Adding capacitance may slow turn-on response and is unnecessary for noise immunity in typical PCB layouts.
Can the MAX8863SEUK-T safely drive a 10 µF ceramic output capacitor?
Yes, the MAX8863SEUK-T is explicitly designed to be stable with any capacitor type and value, including 10 µF ceramic capacitors. Unlike many LDOs, it imposes no minimum ESR requirement - enabling use of low-ESR ceramics for improved transient response without risk of oscillation or instability.
What is the maximum allowable input voltage for the MAX8863SEUK-T when operating at 85°C ambient?
The absolute maximum input voltage for the MAX8863SEUK-T is 6.5 V at all temperatures, including +85°C ambient. However, for reliable continuous operation, VIN must remain ≤6.0 V per the recommended operating conditions, and power dissipation must stay within thermal limits - e.g., at 120 mA load and 6.0 V input, ensure adequate PCB copper area on GND pins to maintain junction temperature ≤+150°C.
How does the MAX8863SEUK-T behave during thermal shutdown, and can it self-recover?
When the MAX8863SEUK-T junction temperature exceeds 170°C, thermal shutdown activates, turning off the pass transistor and reducing output to zero. It self-recovers once the junction cools by 20°C (to ~150°C), at which point regulation resumes automatically - no external reset or power cycle is needed. This hysteresis prevents oscillatory shutdown/restart under sustained overload.
MAX8863SEUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 1.25V (2.84V)
- 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
MAX8863SEUK-T FAQ
1.How can I place an order for MAX8863SEUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8863SEUK-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 MAX8863SEUK-T reliable?
The price and inventory of MAX8863SEUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8863SEUK-T is usually 5 days.
3.What payment methods are accepted for MAX8863SEUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8863SEUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8863SEUK-T?
MAX8863SEUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8863SEUK-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 MAX8863SEUK-T?
For technical support, including MAX8863SEUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8863SEUK-T requirements.
6.How does Aetrix verify that MAX8863SEUK-T is sourced from the original manufacturer or authorized distributors?
All MAX8863SEUK-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 MAX8863SEUK-T meets industry standards.
7.What is the process for return or replacement of MAX8863SEUK-T?
All MAX8863SEUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8863SEUK-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 MAX8863SEUK-T part is unused and in its original packaging.
Return procedure for MAX8863SEUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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