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Analog Devices Inc./Maxim Integrated MAX8864TEUK-T
- Part No.:
- MAX8864TEUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8864TEUK-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
MAX8864TEUK-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 integrated auto-discharge functionality during shutdown. It targets battery-powered portable equipment including cellular phones and modems.
For engineers reviewing the MAX8864TEUK-T datasheet, MAX8864TEUK-T pinout, MAX8864TEUK-T application, or MAX8864TEUK-T equivalent, key selection criteria include its fixed 3.15V output, SOT23-5 package, auto-discharge capability (exclusive to MAX8864), thermal shutdown at 170°C, and reverse battery protection limiting reverse current to <1mA.
Technical Context
The MAX8864TEUK-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™ operation selects between preset voltage (3.15V) and adjustable mode based on SET pin voltage relative to 60mV threshold.
Shutdown logic disables all internal circuitry-including reference and bias-reducing supply current to 0.1nA; the MAX8864TEUK-T uniquely activates a 300Ω discharge path from OUT to GND during shutdown. 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 for 3.3V logic rails with tighter tolerance. |
| Dropout Voltage | 55mV at 50mA load, allowing operation down to VIN = 3.205V while maintaining regulation-critical for end-of-life Li-ion battery use. |
| Supply Current | 80µA operating (load-independent), ensuring >10-year battery life in 50µA standby systems with no load dependency penalty. |
| Output Noise | 350µVRMS (10Hz–1MHz), compatible with 12-bit ADCs without additional filtering when power supply rejection is considered. |
| Shutdown Current | 0.1nA typical, reducing system leakage to negligible levels in deep-sleep modes across wide temperature range. |
| Auto-Discharge | 300Ω active discharge path from OUT to GND during SHDN assertion, eliminating external discharge circuitry and preventing floating outputs. |
| Thermal Shutdown | 170°C trip point with 20°C hysteresis, providing robust fault recovery in thermally constrained SOT23-5 PCB layouts. |
Pinout & Package
MAX8864TEUK-T is housed in a RoHS-compliant 5-pin SOT23 package (U5+1 outline, 21-0057), with GND serving dual role as electrical reference and thermal heatsink-requiring connection to large copper area or ground plane for θJA = 255.9°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low shutdown control | Logic low disables regulator and initiates auto-discharge; must be pulled high (e.g., to IN) for normal operation; VIH ≥ 2.0V, VIL ≤ 0.4V. |
| 2 - GND | Power and signal ground | Primary return path and thermal conduction node-solder pad size directly impacts thermal resistance and maximum continuous power dissipation. |
| 3 - IN | Input voltage supply | Accepts +2.5V to +6.5V; requires ≥1µF bypass capacitor to GND near pin to suppress input transients and ensure stability. |
| 4 - OUT | Regulated output | Delivers up to 120mA at 3.15V; requires ≥1µF, <0.2Ω ESR ceramic capacitor to GND for stability and transient response. |
| 5 - SET | Feedback mode selector | Connected to GND for fixed 3.15V output; voltage <60mV enables internal divider; open or >60mV enables external resistor adjustment. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Operation | Hardware-selectable fixed (3.15V) or adjustable (1.25V–6.5V) output via single SET pin voltage threshold-no external components needed for fixed mode. |
| Auto-Discharge (MAX8864 only) | Integrated 300Ω discharge switch actively pulls OUT to GND during shutdown-eliminates need for external MOSFET or resistor network. |
| Reverse Battery Protection | Blocks reverse current <1mA when VIN or SHDN falls below GND-prevents battery drain and IC damage without external diodes. |
| Load-Independent Quiescent Current | 80µA constant supply current across full 0–120mA load range and in dropout-enables predictable battery lifetime modeling. |
| Thermal Hysteresis Recovery | 20°C hysteresis ensures stable oscillation-free recovery after thermal shutdown-avoids latch-up or erratic restart behavior under sustained overload. |
Applications
| Cellular Telephones | Cordless Telephones |
|---|---|
Use Scenario: Powering baseband processor core voltage rail in GSM/CDMA handsets with Li-ion battery input. IC Role / Device Role / Timing Role: Primary LDO supplying stable 3.15V to RF transceiver and digital baseband ICs during transmit bursts. Use Value: 55mV dropout extends usable battery range to 3.205V, while 80µA quiescent current preserves standby time exceeding 30 days. |
Use Scenario: Regulating power for DECT handset DSP and audio codec in battery-backed cordless phone systems. IC Role / Device Role / Timing Role: Fixed-output LDO delivering clean 3.15V to analog front-end and low-noise audio amplifiers. Use Value: 350µVRMS noise meets SNR requirements for 16-bit audio DACs; auto-discharge prevents residual output voltage during sleep mode. |
| Modems | PCMCIA Cards |
Use Scenario: Providing regulated supply to V.92/V.34 modem ICs in portable laptop docking stations. IC Role / Device Role / Timing Role: Secondary LDO generating 3.15V from main 5V rail for analog line interface and data pump circuits. Use Value: Reverse battery protection safeguards against accidental polarity reversal during hot-plug insertion; thermal shutdown prevents damage during sustained line fault conditions. |
Use Scenario: Power management for PC Card (PCMCIA) wireless LAN adapters operating from host 3.3V or battery sources. IC Role / Device Role / Timing Role: Input-voltage-flexible LDO converting variable host supply (2.5–6.5V) to stable 3.15V for WLAN MAC/PHY ICs. Use Value: Wide input range accommodates both USB-powered (5V) and battery-powered (3.6V nominal) operation; SOT23-5 footprint minimizes board space in compact card designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout, fixed-output regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8863TEUK-T | No auto-discharge function; identical pinout, 3.15V output, and electrical specs except missing active OUT-to-GND discharge path. | Suitable where shutdown discharge is handled externally or unnecessary; lacks integrated discharge timing control and current limiting. | Select MAX8863TEUK-T only if auto-discharge is not required and cost sensitivity favors removal of unused functionality. |
| MCP1700T-315I/TT | Higher 175mV dropout at 250mA, 2.5µA quiescent current, no reverse battery protection, no auto-discharge, SOT23-3 package (no SET/SHDN pins). | Limited to ultra-low-IQ applications with ample headroom; incompatible with Dual Mode™ or shutdown-controlled discharge requirements. | Choose MCP1700T-315I/TT only for simple, low-cost, non-shutdown applications where 3.15V fixed output suffices and thermal/reverse protection are managed elsewhere. |
Compared with MAX8864TEUK-T, MAX8863TEUK-T omits auto-discharge but retains identical regulation accuracy and thermal protection, while MCP1700T-315I/TT trades off protection features and dropout performance for lower quiescent current and reduced pin count-making it unsuitable for battery-reversal-prone or fast-shutdown-critical designs.
Availability
MAX8864TEUK-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 MAX8864TEUK-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, communications, and consumer applications.
The MAX8863/MAX8864 family was engineered specifically for battery-powered portable electronics requiring ultra-low quiescent current, low dropout, and integrated protection-targeting cellular handsets, modems, and handheld instruments.
FAQ
What is the output voltage tolerance of the MAX8864TEUK-T over temperature?
The MAX8864TEUK-T delivers a nominal 3.15V output with ±100mV tolerance across the full -40°C to +85°C operating range, as specified in the Electrical Characteristics table. This corresponds to ±3.2% accuracy at room temperature and maintains tight regulation due to internal laser-trimmed feedback resistors-ensuring compatibility with 3.3V logic interfaces without external compensation.
Does the MAX8864TEUK-T require external components for basic operation?
Yes-the MAX8864TEUK-T requires at minimum a 1µF ceramic capacitor on both IN and OUT pins referenced to GND for stability and transient response. No external resistors are needed for fixed 3.15V operation since the SET pin is tied to GND; however, omitting these capacitors risks oscillation, poor PSRR, and load-transient overshoot exceeding 12mV.
How does the auto-discharge function work in the MAX8864TEUK-T?
When the SHDN pin is driven low, the MAX8864TEUK-T activates an internal 300Ω switch between the OUT and GND pins, actively discharging the output capacitance to ground. This behavior is exclusive to the MAX8864 series and eliminates residual voltage that could interfere with downstream circuit reset sequencing or cause leakage in powered-down subsystems.
Can the MAX8864TEUK-T operate with input voltages below 2.5V?
No-the MAX8864TEUK-T has a specified minimum input voltage of +2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this level is not guaranteed and may result in loss of regulation, increased dropout, or failure to start up. The device will not function reliably at 2.4V or lower, even with light loads.
What protection features are integrated into the MAX8864TEUK-T?
The MAX8864TEUK-T integrates five protection functions: (1) thermal shutdown at 170°C with 20°C hysteresis, (2) short-circuit current limiting (~280mA), (3) reverse battery protection (<1mA reverse current), (4) safe-area SOA limiting via internal power dissipation control, and (5) output auto-discharge during shutdown. All operate autonomously without external components.
MAX8864TEUK-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
MAX8864TEUK-T FAQ
1.How can I place an order for MAX8864TEUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8864TEUK-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 MAX8864TEUK-T reliable?
The price and inventory of MAX8864TEUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8864TEUK-T is usually 5 days.
3.What payment methods are accepted for MAX8864TEUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8864TEUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8864TEUK-T?
MAX8864TEUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8864TEUK-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 MAX8864TEUK-T?
For technical support, including MAX8864TEUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8864TEUK-T requirements.
6.How does Aetrix verify that MAX8864TEUK-T is sourced from the original manufacturer or authorized distributors?
All MAX8864TEUK-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 MAX8864TEUK-T meets industry standards.
7.What is the process for return or replacement of MAX8864TEUK-T?
All MAX8864TEUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8864TEUK-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 MAX8864TEUK-T part is unused and in its original packaging.
Return procedure for MAX8864TEUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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