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onsemi MAX8863QEUK-T
- Part No.:
- MAX8863QEUK-T
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
-
MAX8863QEUK-T.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
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Inventory:15,000
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Product details
Overview
MAX8863QEUK-T from ON Semiconductor is a fixed-output, low-dropout linear regulator delivering up to 120 mA with a preset 2.80 V output, operating from +2.5 V to +6.0 V input. It features 55 mV dropout at 50 mA, 50 µA quiescent current (even in dropout), and active shutdown with 0.1 nA supply current-designed for battery-powered portable electronics such as cordless telephones and PCMCIA cards.
For engineers reviewing the MAX8863QEUK-T datasheet, pinout, applications, or equivalent options, key selection criteria include its SOT-23-5 package compatibility, thermal shutdown at 170°C, 350 µVRMS output noise, and guaranteed load regulation of ≤0.040%/mA across –40°C to +85°C.
Technical Context
The MAX8863QEUK-T integrates a 1.20 V bandgap reference, error amplifier, MOSFET driver, and P-channel pass transistor to regulate output voltage with minimal dropout and ultra-low quiescent current. Its internal feedback divider fixes the output at 2.80 V, and the SHDN pin enables active discharge of the output during shutdown.
It employs a 1.1 Ω P-channel MOSFET pass element-eliminating base-drive current loss typical of PNP-based regulators-enabling stable operation with any capacitor type and supporting fast 140 µs settling time after shutdown release under 30 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.80 V ±50 mV over full temperature and load range-ensures stable core logic or RF bias rail without external resistors. |
| Max Output Current | 120 mA continuous-supports moderate-power microcontrollers or analog front-ends in handheld instruments. |
| Dropout Voltage | 55 mV @ 50 mA-enables >98% efficiency at light loads and extends usable battery life down to ~2.85 V input. |
| Quiescent Current | 50 µA (typical), independent of load-even in dropout-minimizes standby power in always-on subsystems. |
| Shutdown Current | 0.1 nA (typical)-reduces system-level leakage to negligible levels during deep sleep modes. |
| Output Noise | 350 µVRMS (10 Hz–1 MHz)-low enough for powering 12-bit ADC references without additional filtering. |
| Thermal Shutdown | 170°C trip with 20°C hysteresis-protects against sustained overload while allowing recovery without manual reset. |
Pinout & Package
SOT-23-5 package (Case 1212), 2.80 mm × 2.50 mm footprint, 0.95 mm pin pitch, with exposed GND pad for thermal dissipation. Pin 2 and Pin 5 are both GND-used jointly for electrical return and heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low shutdown control | Pull low to disable regulator and actively discharge OUT to GND; connect to IN for normal operation. |
| 2 - GND | Power ground / thermal pad | Primary ground return path and main thermal conduction path-must be soldered to large PCB copper area. |
| 3 - IN | Input voltage supply | Accepts +2.5 V to +6.0 V; requires ≥1 µF bypass capacitor to GND for stability and transient response. |
| 4 - OUT | Regulated output | Delivers up to 120 mA at 2.80 V; requires ≥1 µF output capacitor with ≤1.0 Ω ESR for guaranteed stability. |
| 5 - GND | Secondary ground connection | Redundant ground terminal-electrically tied to Pin 2 internally; enhances thermal and EMI performance when both are routed to ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with any capacitor type | Eliminates need for low-ESR tantalum or ceramic-specific designs-supports cost-effective aluminum or multilayer ceramic capacitors. |
| 140 µs settling time from shutdown | Enables rapid wake-up in burst-mode systems (e.g., modem data transmission) without output overshoot or extended stabilization delay. |
| Thermal overload protection | Auto-cycles output during sustained overtemperature events-prevents permanent damage without requiring external thermal management circuitry. |
| Active output discharge | Drives OUT to GND during shutdown-prevents floating outputs that could cause latch-up or unintended biasing in downstream circuitry. |
| Current limit (280 mA typ.) | Protects internal pass transistor and upstream source during short-circuit or heavy transient loads-no external current-sense resistor needed. |
Applications
| Cordless Telephones | PCMCIA Cards |
|---|---|
Use Scenario: Powering RF transceiver ICs and baseband processors in 900 MHz/2.4 GHz DECT handsets with single-cell Li-ion or NiMH batteries. IC Role / Device Role / Timing Role: Primary 2.80 V LDO supplying clean, low-noise voltage to sensitive RF sections and digital logic blocks. Use Value: 55 mV dropout extends talk time by enabling operation down to 2.85 V input; 350 µVRMS noise prevents spurious emissions in adjacent channels. | Use Scenario: Regulating auxiliary power for memory and I/O controllers on Type II PCMCIA expansion cards inserted into laptops. IC Role / Device Role / Timing Role: Standby and active-mode voltage regulator with shutdown control synchronized to card insertion/removal detection. Use Value: 0.1 nA shutdown current eliminates parasitic drain during card ejection; SOT-23-5 footprint fits tight card-edge space constraints. |
| Modems | Hand-Held Instruments |
Use Scenario: Providing stable 2.80 V supply to DSP and line-driver ICs in embedded V.90/V.92 dial-up modems operating from wall adapters or backup batteries. IC Role / Device Role / Timing Role: Low-noise, line-transient-immune regulator handling dynamic load steps during handshake and data transmission bursts. Use Value: 62 dB PSRR at low frequencies suppresses ripple from unregulated wall adapters; 12 mV typical load-step overshoot ensures signal integrity. | Use Scenario: Powering precision analog front-ends (op-amps, sensors, 12-bit ADCs) and microcontrollers in portable multimeters and environmental monitors. IC Role / Device Role / Timing Role: Precision analog rail generator with low drift and minimal noise contribution to measurement accuracy. Use Value: ±50 mV output tolerance and <0.040%/mA load regulation ensure consistent sensor excitation and reference stability across battery discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 250 mA max output, 1.6 µA quiescent current, no active output discharge, SOT-23-3 package. | Lacks SHDN-controlled discharge and dual-GND thermal design-unsuitable where output must be pulled to GND during sleep. | Select when higher output current and ultra-low IQ are prioritized over active discharge and thermal robustness. |
| NCP1117ST28T3G | 1 A output, 8 mV/mA load regulation, 1.2 V dropout @ 800 mA, TO-220/SOT-223 package. | Higher dropout and larger footprint-requires board redesign and cannot replace MAX8863QEUK-T in space-constrained portable designs. | Select only for high-current, non-portable applications where thermal mass and PCB area permit larger packaging. |
Compared with MCP1700T-2802E/TT and NCP1117ST28T3G, the MAX8863QEUK-T uniquely balances 120 mA capability, 50 µA IQ, active output discharge, and SOT-23-5 thermal design-making it optimal for compact, battery-sensitive systems requiring controlled shutdown behavior.
Availability
MAX8863QEUK-T is available at Aetrix Electronics and suitable for cordless telephones, PCMCIA cards, and hand-held instruments requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX8863QEUK-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 manufacturer specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and portable electronics.
The MAX8863 series was designed specifically for battery-operated portable equipment-including cellular phones, modems, and handheld instruments-where low quiescent current, small footprint, and reliable shutdown behavior are critical.
FAQ
What is the output voltage tolerance of the MAX8863QEUK-T over temperature and load?
The MAX8863QEUK-T delivers a nominal 2.80 V output with a guaranteed tolerance of ±50 mV (±1.79%) across –40°C to +85°C and 0–50 mA load range, as specified in the Electrical Characteristics table. This tight tolerance ensures reliable operation of 2.8 V logic rails and analog circuits without external trimming or feedback adjustment.
Does the MAX8863QEUK-T require specific output capacitor types or ESR values?
Yes-the MAX8863QEUK-T is stable with any capacitor type but requires a minimum 1.0 µF output capacitor with ≤1.0 Ω ESR for guaranteed stability across temperature and load. Ceramic, tantalum, or aluminum electrolytic capacitors meeting this ESR spec are acceptable; no external compensation components are needed.
How does the MAX8863QEUK-T behave during shutdown, and what happens to the output pin?
When SHDN is pulled low, the MAX8863QEUK-T disables the pass transistor and internal circuitry, reducing supply current to 0.1 nA. Crucially, it also actively discharges the OUT pin to GND via an internal switch-preventing floating outputs that could cause downstream latch-up or undefined logic states in powered-off subsystems.
What is the maximum allowable input voltage for the MAX8863QEUK-T, and what happens beyond that?
The absolute maximum input voltage for the MAX8863QEUK-T is 6.5 V. Operation above this rating risks permanent damage. The device operates continuously within +2.5 V (or +2.7 V for 1.8 V variants) to +6.0 V; exceeding +6.0 V violates recommended operating conditions and may degrade reliability even if below 6.5 V absolute max.
Can the MAX8863QEUK-T be used in place of the Maxim MAX8863?
Yes-the MAX8863QEUK-T is explicitly pin-compatible with the Maxim MAX8863 LDO, sharing identical SOT-23-5 pinout, electrical specifications, and functional behavior. ON Semiconductor acquired the MAX8863 design and maintains full second-source compatibility, including identical marking codes and thermal performance.
MAX8863QEUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- -
- Output Type:
- -
- Number of Regulators:
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- -
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX8863QEUK-T FAQ
1.How can I place an order for MAX8863QEUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8863QEUK-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 MAX8863QEUK-T reliable?
The price and inventory of MAX8863QEUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8863QEUK-T is usually 5 days.
3.What payment methods are accepted for MAX8863QEUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8863QEUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8863QEUK-T?
MAX8863QEUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8863QEUK-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 MAX8863QEUK-T?
For technical support, including MAX8863QEUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8863QEUK-T requirements.
6.How does Aetrix verify that MAX8863QEUK-T is sourced from the original manufacturer or authorized distributors?
All MAX8863QEUK-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 MAX8863QEUK-T meets industry standards.
7.What is the process for return or replacement of MAX8863QEUK-T?
All MAX8863QEUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8863QEUK-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 MAX8863QEUK-T part is unused and in its original packaging.
Return procedure for MAX8863QEUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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