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Analog Devices Inc./Maxim Integrated MAX8866TEUA-T
- Part No.:
- MAX8866TEUA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX8866TEUA-T.pdf
- Description:
- IC REG LIN POS ADJ 100MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,034
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Product details
Overview
MAX8866TEUA-T from Maxim Integrated is a dual, low-dropout linear regulator IC delivering two independent 3.15V fixed outputs (T-version) or adjustable 1.25V–5.5V outputs, each capable of sourcing up to 100mA. It operates from +2.5V to +5.5V input, features 55mV dropout at 50mA, 145µA operating supply current, and integrated auto-discharge on shutdown-designed for battery-powered portable systems including cellular phones and modems.
For engineers reviewing the MAX8866TEUA-T datasheet, MAX8866TEUA-T pinout, MAX8866TEUA-T application, or MAX8866TEUA-T equivalent, key selection criteria include its dual independent shutdown control, reverse battery protection, thermal shutdown with 20°C hysteresis, 350µVRMS output noise, and µMAX-8 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX8866TEUA-T integrates two independent P-channel MOSFET pass transistors (1.1Ω typical RDS(ON)) with shared 1.25V bandgap reference and thermal sensor. Each regulator employs error amplification, MOSFET driver, and Dual Mode™ comparator to select between internal fixed-voltage feedback (3.15V for T-variant) or external resistor-divider-adjustable output.
Unlike the MAX8865, the MAX8866TEUA-T adds active auto-discharge circuitry that pulls either OUT1 or OUT2 to ground during individual SHDN assertion-critical for fast power-state transitions in portable devices. Shutdown logic disables bias circuits, reducing total supply current to 0.16nA when both regulators are off.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.15V (fixed, T-version); selectable 1.25V–5.5V via external SET resistors |
| Max Output Current | 100mA per channel; current limit 120–320mA (design range) |
| Dropout Voltage | 55mV @ 50mA load-enables operation down to VIN = VOUT + 55mV |
| Supply Current | 145µA operating (even in dropout); 0.16nA in full shutdown |
| Output Noise | 350µVRMS (10Hz–1MHz)-suitable for 12-bit+ ADC power domains |
| Input Voltage Range | +2.5V to +5.5V-compatible with single Li-ion, NiMH, or regulated 3.3V/5V rails |
| Thermal Protection | Shuts down at +170°C junction; restarts after ~20°C cooldown hysteresis |
Pinout & Package
MAX8866TEUA-T is housed in an 8-pin µMAX package (3.05mm × 3.05mm × 0.91mm), optimized for thermal dissipation via exposed GND pad soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 (Pin 1) | Regulator 1 output | Sources up to 100mA; bypass with 1µF ceramic capacitor to GND |
| IN (Pin 2) | Input supply rail | +2.5V to +5.5V input; bypass with 2µF ceramic capacitor to GND |
| GND (Pin 3) | Power and signal ground | Shared reference for both regulators; must connect to large copper area for thermal management |
| OUT2 (Pin 4) | Regulator 2 output | Independent 100mA output; identical specs and bypassing as OUT1 |
| SET2 (Pin 5) | Feedback input for OUT2 | Ground for 3.15V fixed mode; connect to external divider for adjustable output |
| SET1 (Pin 6) | Feedback input for OUT1 | Same function as SET2; enables independent configuration of each output |
| SHDN1 (Pin 7) | Active-low enable for OUT1 | Pull low to disable OUT1; triggers auto-discharge to GND on MAX8866 only |
| SHDN2 (Pin 8) | Active-low enable for OUT2 | Independent control of OUT2; same auto-discharge behavior as SHDN1 |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ operation | Single-pin (SETx) selection between factory-trimmed 3.15V output or 1.25V–5.5V adjustable output-no external components needed for fixed mode |
| Auto-discharge (MAX8866 only) | Actively pulls OUT1 or OUT2 to GND within 1ms of SHDNx assertion-eliminates hold-up voltage during partial power-down sequences |
| Reverse battery protection | Limits reverse current to <1mA if VIN or SHDNx falls below GND-prevents battery drain and IC damage in miswired portable systems |
| Low-noise regulation | 350µVRMS output noise (10Hz–1MHz) with no additional filtering-reduces need for post-regulator LC stages in sensitive analog circuits |
| Ultra-low quiescent current | 145µA total supply current at 200mA combined load-even in dropout-extending battery life in always-on subsystems |
Applications
| Cellular Telephones | Cordless Telephones |
|---|---|
|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O supplies in dual-voltage handset designs. IC Role / Device Role / Timing Role: Dual LDO provides isolated, low-noise 3.15V for RF section and 2.84V (via MAX8866SEUA-T variant) for digital core-minimizing cross-talk and supply-induced phase noise. Use Value: 55mV dropout extends usable battery range by ~120mV per cell; auto-discharge ensures clean reset sequencing during sleep/wake transitions. |
Use Scenario: Supplying DSP, codec, and display drivers in DECT 6.0 cordless handsets with tight board space constraints. IC Role / Device Role / Timing Role: Independent shutdown of OUT1 (DSP core) and OUT2 (LCD backlight) enables dynamic power gating without shared reset dependencies. Use Value: 145µA operating current reduces standby drain; reverse battery protection prevents field failures from accidental battery reversal during user replacement. |
| Modems | PCMCIA Cards |
|
Use Scenario: Generating clean 3.15V and 2.84V supplies for ADSL line driver and PHY interface in embedded broadband modems. IC Role / Device Role / Timing Role: Dual LDO replaces discrete regulators and filtering, simplifying layout while meeting EMI limits for Class B emissions compliance. Use Value: 350µVRMS noise meets SNR requirements for 16-bit analog front-ends; thermal shutdown protects against sustained overloads during line fault conditions. |
Use Scenario: Providing dual regulated voltages for PCMCIA Type II card logic (3.3V) and flash memory interface (2.84V) in portable computing peripherals. IC Role / Device Role / Timing Role: Independent SETx pins allow one output to run fixed 3.15V (logic) while the other is adjusted to 2.84V (memory) using minimal external resistors. Use Value: µMAX-8 footprint fits within PCMCIA's 54.0mm × 36.5mm envelope; low 244°C/W θJA enables reliable operation at 70°C ambient without heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2020PDQNR | Single-output, 200mA, 1.2V–5.5V adjustable; no auto-discharge or dual independent shutdown | Requires two devices for dual-rail support; lacks reverse battery protection | Select when higher current per rail (>100mA) or lower dropout (<45mV) is required, and auto-discharge is unnecessary |
| ADP7156ACPZ-3.15-R7 | Single-output, 600mA, ultra-low noise (4.7µVRMS); no dual output or SET-pin flexibility | Higher cost; requires external sequencing for multi-rail systems | Choose for noise-critical analog subsystems where 350µVRMS is insufficient and dual outputs are implemented separately |
Compared with TPS7A2020PDQNR and ADP7156ACPZ-3.15-R7, the MAX8866TEUA-T uniquely delivers dual independent 100mA outputs with auto-discharge, reverse battery protection, and Dual Mode™ configurability in a single µMAX-8 package-reducing component count and PCB area for portable dual-rail applications.
Availability
MAX8866TEUA-T is available at Aetrix Electronics and suitable for cellular telephones, cordless telephones, and modems requiring stable component supply across extended production lifecycles and temperature ranges (-40°C to +85°C).
Supply support for MAX8866TEUA-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 MAX8866TEUA-T belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-powered portable electronics where ultra-low quiescent current, small footprint, and robust protection features are critical.
FAQ
What output voltage does the MAX8866TEUA-T deliver in fixed mode?
The MAX8866TEUA-T delivers 3.15V on both OUT1 and OUT2 when SET1 and SET2 are connected to GND-the "T" suffix denotes this factory-trimmed output voltage. This fixed mode requires no external resistors and maintains ±1% accuracy over -40°C to +85°C. The MAX8866TEUA-T achieves this via laser-trimmed internal feedback dividers referenced to a 1.25V bandgap.
Does the MAX8866TEUA-T support adjustable output voltages?
Yes, the MAX8866TEUA-T supports adjustable outputs from 1.25V to 5.5V using external resistor dividers on SET1 and SET2. When SETx is connected to a voltage divider instead of GND, the device enters adjustable mode and regulates VOUTx = 1.25V × (1 + R1/R2). The MAX8866TEUA-T's Dual Mode™ comparator detects SETx voltage to automatically select the feedback path.
How does the auto-discharge function work on the MAX8866TEUA-T?
The MAX8866TEUA-T actively discharges OUT1 or OUT2 to GND within 1ms when SHDN1 or SHDN2 is pulled low-this feature is exclusive to the MAX8866 family and not present in MAX8865. The discharge path uses an internal NMOS switch with <10Ω on-resistance, ensuring rapid voltage collapse without external components. This behavior is confirmed in the MAX8866TEUA-T's Typical Operating Characteristics graphs.
What protection features are integrated into the MAX8866TEUA-T?
The MAX8866TEUA-T integrates thermal shutdown (trip at +170°C, 20°C hysteresis), short-circuit protection (indefinite output shorting), reverse battery protection (<1mA reverse current), and current limiting (120–320mA design range). These protections operate independently per channel and do not require external components-verified in the Absolute Maximum Ratings and Electrical Characteristics tables of the MAX8866TEUA-T datasheet.
What is the recommended input and output capacitance for the MAX8866TEUA-T?
The MAX8866TEUA-T requires a minimum 2µF ceramic capacitor on IN and 1µF ceramic capacitors on each OUT for stable operation across -40°C to +85°C. Larger values (e.g., 10µF IN, 10µF OUT) improve transient response and PSRR above 100kHz. The MAX8866TEUA-T's stability is validated with X7R or X5R dielectrics; ESR should be <100mΩ for COUT to remain within the stable region shown in Figure 11 of the datasheet.
MAX8866TEUA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.25V (3.15V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.12V @ 50mA, 0.12V @ 50mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 270 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX8866TEUA-T FAQ
1.How can I place an order for MAX8866TEUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8866TEUA-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 MAX8866TEUA-T reliable?
The price and inventory of MAX8866TEUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8866TEUA-T is usually 5 days.
3.What payment methods are accepted for MAX8866TEUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8866TEUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8866TEUA-T?
MAX8866TEUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8866TEUA-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 MAX8866TEUA-T?
For technical support, including MAX8866TEUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8866TEUA-T requirements.
6.How does Aetrix verify that MAX8866TEUA-T is sourced from the original manufacturer or authorized distributors?
All MAX8866TEUA-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 MAX8866TEUA-T meets industry standards.
7.What is the process for return or replacement of MAX8866TEUA-T?
All MAX8866TEUA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8866TEUA-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 MAX8866TEUA-T part is unused and in its original packaging.
Return procedure for MAX8866TEUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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