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Analog Devices Inc./Maxim Integrated MAX8866TEUA
- Part No.:
- MAX8866TEUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX8866TEUA.pdf
- Description:
- IC REG LIN POS ADJ 100MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,631
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Product details
Overview
MAX8866TEUA 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 sourcing up to 100mA from a +2.5V to +5.5V input. It features 55mV dropout at 50mA, 145µA operating supply current, and auto-discharge functionality on shutdown-enabling precise power sequencing in battery-powered portable electronics such as cellular phones and modems.
For engineers reviewing the MAX8866TEUA datasheet, MAX8866TEUA pinout, MAX8866TEUA application, or MAX8866TEUA equivalent, key selection criteria include its dual-mode operation (fixed/adjustable), thermal shutdown at +170°C, reverse battery protection, ±2% output voltage accuracy over temperature, and µMAX-8 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX8866TEUA integrates two independent P-channel MOSFET-based LDO regulators sharing a 1.25V bandgap reference and thermal sensor. Each regulator employs an error amplifier, MOSFET driver, and Dual Mode™ comparator to select between internal feedback (for preset 3.15V output) or external resistor divider (for adjustable output).
Its auto-discharge function-exclusive to the MAX8866 family-actively pulls either OUT1 or OUT2 to ground when the corresponding SHDN pin is asserted low. Reverse battery protection limits reverse current to <1mA when VIN or SHDN falls below GND, and thermal shutdown engages at +170°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.15V (fixed, T-version); ±2% accuracy over –40°C to +85°C - ensures stable bias for RF front-ends and baseband ICs. |
| Dropout Voltage | 55mV @ 50mA - enables operation down to 3.205V input for 3.15V output, extending usable battery life in single-cell Li-ion systems. |
| Supply Current | 145µA @ 200mA total load - maintains ultra-low quiescent draw even in dropout, critical for standby power budgets. |
| Output Noise | 350µVRMS (10Hz–1MHz) - low enough for powering 12-bit ADCs without additional filtering in handheld instruments. |
| Thermal Shutdown | +170°C activation with +20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| Input Voltage Range | +2.5V to +5.5V - supports direct connection to Li-ion, NiMH, or regulated 3.3V/5V rails without pre-regulation. |
| Current Limit | 120mA min / 320mA max per channel - protects against short circuits while allowing safe transient surges during modem burst transmission. |
Pinout & Package
MAX8866TEUA is housed in an 8-pin µMAX package (3.05mm × 3.05mm × 0.8mm, 0.65mm pitch), optimized for high-density portable PCBs. Thermal performance is enhanced by soldering the exposed pad (GND) to a large copper plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 (Pin 1) | Regulator 1 output | Sources up to 100mA; bypass with 1µF ceramic capacitor to GND for stability and noise suppression. |
| IN (Pin 2) | Input supply | Accepts +2.5V to +5.5V; requires 2µF ceramic bypass capacitor to minimize input ripple and improve transient response. |
| GND (Pin 3) | Ground reference | Common return for both regulators and thermal sensor; must connect to large PCB ground plane for thermal dissipation. |
| OUT2 (Pin 4) | Regulator 2 output | Independent 100mA output with identical specs to OUT1; supports dual-rail systems like analog/digital core separation. |
| SET2 (Pin 5) | Feedback input for OUT2 | Connect to GND for 3.15V fixed output; connect external resistor divider for adjustable mode (1.25V–5.5V). |
| SET1 (Pin 6) | Feedback input for OUT1 | Same function as SET2; enables independent configuration of each output (e.g., 3.15V + 2.84V). |
| SHDN1 (Pin 7) | Active-low shutdown for OUT1 | Pulling low disables OUT1 and triggers auto-discharge to GND - enables controlled power-down sequencing. |
| SHDN2 (Pin 8) | Active-low shutdown for OUT2 | Independent control of OUT2; auto-discharge active only on MAX8866 (not MAX8865). |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ operation | Single-pin (SETx) selection between factory-trimmed 3.15V output or user-adjustable 1.25V–5.5V via external resistors - eliminates need for multiple SKUs in design-in. |
| Auto-discharge (MAX8866 only) | Active pull-down of OUT1/OUT2 to GND during shutdown - prevents floating voltages that could cause latch-up in downstream logic or RF stages. |
| Reverse battery protection | Limits reverse current to <1mA when VIN or SHDN pins go below GND - safeguards battery and system during incorrect insertion or fault conditions. |
| Low-noise regulation | 350µVRMS output noise with no added filtering - meets noise requirements for precision analog signal chains in palmtop computers and electronic planners. |
| Thermal overload protection | Self-resetting shutdown at +170°C with 20°C hysteresis - allows safe recovery after brief overloads without manual reset or system intervention. |
Applications
| Cellular Telephones | Cordless Telephones |
|---|---|
Use Scenario: Powering RF transceiver and baseband processor from a single Li-ion cell. IC Role / Device Role / Timing Role: Dual LDO provides isolated 3.15V rails for analog RF section and digital core, minimizing crosstalk and supply-induced jitter. Use Value: 55mV dropout extends talk time by enabling regulation until battery voltage drops to 3.205V; auto-discharge prevents residual charge from interfering with fast power cycling. |
Use Scenario: Supplying DSP, codec, and display controller in DECT handsets with tight PCB area constraints. IC Role / Device Role / Timing Role: Dual-output LDO replaces two discrete regulators, reducing BOM count and layout complexity while maintaining rail independence. Use Value: 145µA quiescent current minimizes standby drain; reverse battery protection guards against accidental reversed battery installation during consumer replacement. |
| Modems | Palmtop Computers |
Use Scenario: Delivering clean, sequenced power to V.34/FAX modem ICs during line negotiation bursts. IC Role / Device Role / Timing Role: Independent SHDN1/SHDN2 pins enable staggered enable/disable of analog and digital supplies to meet modem specification timing windows. Use Value: Auto-discharge ensures rapid voltage collapse on analog rail before digital reset, preventing data corruption during reconnection sequences. |
Use Scenario: Regulating power for LCD controller, flash memory, and touch-screen interface in compact handheld devices. IC Role / Device Role / Timing Role: Dual LDO supplies separate 3.15V rails with low 350µVRMS noise to avoid digitization errors in touch-sensing ADCs. Use Value: 8-pin µMAX footprint saves >40% board area vs. SO-8 alternatives; thermal shutdown prevents overheating during extended CPU-intensive tasks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2020PDQNR | Single-channel, 2.0V fixed output; 250mA rating; 165mV dropout @ 300mA; no auto-discharge or reverse battery protection. | Requires two devices for dual-rail use; lacks shutdown-controlled discharge and reverse polarity safety - unsuitable for battery-reversal-prone consumer ports. | Select when higher output current per rail is needed and dual-rail independence is less critical than cost-per-channel. |
| ADP7156ARDZ-3.15-R7 | Single-channel, 3.15V fixed LDO; 200mA; 120mV dropout @ 200mA; 7µVRMS noise; no dual output or auto-discharge. | Lower noise but no second output or sequencing capability; requires external logic for coordinated shutdown - increases design complexity. | Prefer for ultra-low-noise analog subsystems where dual outputs are not required and board space allows discrete implementation. |
Compared with TPS7A2020PDQNR and ADP7156ARDZ-3.15-R7, the MAX8866TEUA uniquely delivers dual independent 3.15V rails with integrated auto-discharge, reverse battery protection, and sub-150µA quiescent current in a single 8-pin µMAX package - making it optimal for space- and safety-critical portable designs requiring coordinated power management.
Availability
MAX8866TEUA is available at Aetrix Electronics and suitable for cellular telephones, cordless telephones, and modems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing for production programs.
Supply support for MAX8866TEUA 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 MAX8865/MAX8866 product line was designed specifically for battery-powered portable equipment demanding ultra-low quiescent current, dual independent regulation, and robust fault protection-including reverse battery and thermal overload scenarios.
FAQ
What output voltage does the MAX8866TEUA deliver?
The MAX8866TEUA delivers two independent 3.15V fixed outputs (T-version) with ±2% accuracy over –40°C to +85°C. This voltage is factory-trimmed and selected by connecting SET1 and SET2 to GND. The device also supports adjustable outputs from 1.25V to 5.5V using external resistor dividers on the SET pins - but the MAX8866TEUA variant is specified and tested for 3.15V operation.
Does the MAX8866TEUA support independent shutdown of each output?
Yes, the MAX8866TEUA supports fully independent shutdown via SHDN1 (Pin 7) and SHDN2 (Pin 8). Each is an active-low control input: pulling SHDN1 low disables OUT1 and actively discharges it to GND; pulling SHDN2 low does the same for OUT2. Both can be tied to IN for always-on operation, or driven by microcontroller GPIOs for dynamic power sequencing.
What is the dropout voltage specification for the MAX8866TEUA?
The MAX8866TEUA has a typical dropout voltage of 55mV at 50mA load per channel, defined as VIN – VOUT when VOUT drops 100mV below its nominal value. At full 100mA load, dropout rises proportionally due to the P-channel MOSFET's RDS(ON); the datasheet guarantees ≤120mV under worst-case conditions - enabling reliable regulation down to ~3.27V input for 3.15V output.
How does the auto-discharge function work on the MAX8866TEUA?
The auto-discharge function is exclusive to the MAX8866 family (including MAX8866TEUA) and activates when either SHDN1 or SHDN2 is pulled low. An internal NMOS transistor connects the corresponding OUT pin directly to GND, rapidly discharging output capacitance. This prevents floating voltages that could cause unintended logic states or latch-up in downstream circuitry - a critical feature for modem and cellular phone power sequencing.
Is reverse battery protection built into the MAX8866TEUA?
Yes, the MAX8866TEUA includes integrated reverse battery protection. If VIN or either SHDN pin falls below GND, internal circuitry disconnects parasitic paths and limits reverse current to less than 1mA. This protects both the IC and the battery from damage during incorrect installation or system-level fault conditions - a key reliability feature for consumer handheld devices.
MAX8866TEUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for MAX8866TEUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8866TEUA 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 reliable?
The price and inventory of MAX8866TEUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8866TEUA is usually 5 days.
3.What payment methods are accepted for MAX8866TEUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8866TEUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8866TEUA?
MAX8866TEUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8866TEUA 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?
For technical support, including MAX8866TEUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8866TEUA requirements.
6.How does Aetrix verify that MAX8866TEUA is sourced from the original manufacturer or authorized distributors?
All MAX8866TEUA 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 meets industry standards.
7.What is the process for return or replacement of MAX8866TEUA?
All MAX8866TEUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX8866TEUA, 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 part is unused and in its original packaging.
Return procedure for MAX8866TEUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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