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Analog Devices Inc./Maxim Integrated MAX8860EUA27+
- Part No.:
- MAX8860EUA27+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX8860EUA27+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:213
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Product details
Overview
The MAX8860EUA27+ from Maxim Integrated is a low-noise, low-dropout linear regulator with fixed 2.77V output, delivering up to 300mA from 2.5V–6.5V input. It features 60µVRMS output noise, 105mV dropout at 200mA, 120µA no-load supply current, and reverse battery protection. It serves as a core power supply for DSP cores and handheld instrumentation requiring stable, low-noise voltage rails.
For engineers reviewing the MAX8860EUA27+ datasheet, MAX8860EUA27+ pinout, MAX8860EUA27+ application, or MAX8860EUA27+ equivalent, key selection criteria include dropout performance under 200mA load, FAULT indicator behavior during regulation loss, thermal shutdown threshold (170°C), and compatibility with 2.2µF ceramic output capacitors in space-constrained µMAX layouts.
Technical Context
The MAX8860EUA27+ uses an internal P-channel MOSFET pass transistor (RDS(ON) ≈ 0.5Ω) to achieve low dropout and eliminate base-drive current losses. Its Dual Mode™ architecture selects between fixed 2.77V output (SET = GND) and adjustable mode (1.25V–6.5V) via the SET pin voltage threshold (60mV).
Regulation relies on a 1.25V bandgap reference, error amplifier, and MOSFET driver that adjusts gate drive to maintain output. Fault detection monitors both regulation loss (dropout, current limit, thermal shutdown) and insufficient input-output differential (<130mV at 200mA), pulling the open-drain FAULT pin low in either case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.77V (±2.5% over –40°C to +85°C); ensures stable core rail for 2.8V nominal logic domains. |
| Max Output Current | 300mA continuous; supports moderate-power DSPs and microcontrollers without external boost. |
| Dropout Voltage | 105mV at 200mA; enables operation down to 2.875V input with 2.77V output-critical for single-cell Li-ion end-of-life. |
| Output Noise | 60µVRMS (10Hz–100kHz); minimizes jitter in analog/RF sections powered from same rail. |
| Supply Current | 120µA typical at no load; extends battery life in always-on subsystems like real-time clocks or sensors. |
| Shutdown Current | 10nA logic-controlled; allows deep-sleep modes with negligible leakage in portable devices. |
| FAULT Threshold | Detects <130mV VIN–VOUT differential at 200mA; provides early warning before regulation collapse. |
| Thermal Shutdown | Triggers at +170°C with 20°C hysteresis; prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
The MAX8860EUA27+ is housed in an 8-pin µMAX package (3mm × 3mm, 1.1mm max height), optimized for high-density portable PCBs. Thermal resistance θJA = 244°C/W requires copper pour and vias for >150mW dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4 - OUT | Regulated output | Delivers 2.77V; requires ≥2.2µF low-ESR ceramic capacitor to GND for stability and transient response. |
| 2 - IN | Input supply | Accepts 2.5V–6.5V; bypass with 2.2µF capacitor to GND to suppress input ripple and noise. |
| 3 - GND | Power ground | Common return path for IN, OUT, and internal circuitry; must be low-impedance connection to minimize noise coupling. |
| 5 - SET | Voltage select control | Grounded for fixed 2.77V mode; <60mV threshold enables internal feedback divider; impedance <100kΩ required. |
| 6 - CC | Compensation node | Connects 33nF capacitor to GND to stabilize loop, reduce noise, and minimize load/transient overshoot. |
| 7 - SHDN | Logic enable/disable | Driven low (≤0.4V) to enter 10nA shutdown; tied to IN for normal operation; 100nA bias current. |
| 8 - FAULT | Open-drain fault flag | Pulled low during dropout, thermal shutdown, or current limit; requires external pull-up (e.g., 100kΩ to OUT) for logic-level signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ configuration | Single device supports fixed 2.77V output (SET = GND) or adjustable 1.25V–6.5V (external resistor divider), reducing BOM count across product variants. |
| Reverse battery protection | Limits reverse current to <1mA when VIN or SHDN falls below GND, preventing damage from misinstalled batteries in handheld instruments. |
| Low-noise integrator compensation | 33nF capacitor on CC pin reduces output noise by filtering error amplifier offset and improving PSRR above 10kHz. |
| Thermal hysteresis | 20°C gap between 170°C shutdown activation and restart ensures reliable recovery without oscillation during sustained overload. |
| Small capacitor requirement | Stable with only 2.2µF ceramic output capacitor (vs. typical 10µF for older LDOs), saving board area and cost in compact µMAX layouts. |
Applications
| Wireless Handsets | DSP Core Power |
|---|---|
Use Scenario: Powering RF transceiver bias circuits and audio codec analog sections in GSM/EDGE handsets with single Li-ion cell. IC Role / Device Role / Timing Role: Low-noise 2.77V LDO supplying clean VCC to sensitive analog blocks, replacing noisier switching regulators. Use Value: 60µVRMS noise prevents AM modulation of RF carriers; 105mV dropout extends talk time by 12 minutes at end-of-life battery voltage. | Use Scenario: Delivering regulated 2.77V to TI C55x or Analog Devices SHARC DSP cores in portable medical analyzers. IC Role / Device Role / Timing Role: Primary core voltage regulator enabling deterministic instruction execution timing and low-jitter ADC sampling clocks. Use Value: 120µA quiescent current maintains low standby power; FAULT signal triggers graceful core shutdown before brownout-induced corruption. |
| PCMCIA Cards | Hand-Held Instruments |
Use Scenario: Providing isolated 2.77V rail for PCMCIA Type II card controllers in ruggedized field laptops. IC Role / Device Role / Timing Role: Hot-swap compatible LDO with reverse battery protection, ensuring safe insertion/removal without damaging host or card. Use Value: Reverse protection prevents >1mA fault current during accidental reverse polarity; µMAX footprint fits tight card-edge constraints. | Use Scenario: Powering precision 24-bit sigma-delta ADC front-ends and LCD drivers in handheld multimeters and insulation testers. IC Role / Device Role / Timing Role: Stable, low-drift voltage reference source for ratiometric sensor measurements and display bias generation. Use Value: ±2.5% output tolerance over temperature ensures <0.1% measurement error; FAULT output alerts user before reading invalid due to low battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS763275DBVR | 2.75V fixed output (±2%), 150mA max, 120mV dropout at 150mA, 85µA IQ, SOT-23-5 package | Lower current capability and higher dropout limit use in <200mA loads; lacks FAULT pin and reverse battery protection | Select when board space permits SOT-23 and system load never exceeds 150mA with minimal fault monitoring needed. |
| MCP1702T-2702E/MB | 2.7V fixed output (±1%), 250mA max, 600mV dropout at 250mA, 4µA IQ, SOT-23-3 package | Higher dropout eliminates single-cell Li-ion end-of-life support; ultra-low IQ suits always-on sensors but FAULT and reverse protection absent | Choose for ultra-low-power sensor nodes where 2.7V rail suffices and thermal/fault monitoring is handled externally. |
Compared with MAX8860EUA27+, TPS763275DBVR offers smaller footprint but sacrifices 150mA current headroom and critical protection features; MCP1702T-2702E/MB delivers lower quiescent current but cannot sustain regulation below 3.3V input-making MAX8860EUA27+ the only option supporting full Li-ion discharge range with integrated fault signaling.
Availability
MAX8860EUA27+ is available at Aetrix Electronics and suitable for wireless handsets, DSP core power supplies, and hand-held instrumentation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX8860EUA27+ 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, automotive, and portable applications.
The MAX8860 series was developed specifically for battery-powered handheld equipment needing low-noise, low-dropout regulation with integrated fault reporting and reverse-polarity resilience in minimal footprint.
FAQ
What is the guaranteed output voltage tolerance for MAX8860EUA27+ over temperature?
The MAX8860EUA27+ guarantees a 2.77V output with ±2.5% tolerance across the full –40°C to +85°C operating range. At +25°C, the typical output is 2.77V with ±0.5% variation; worst-case deviation remains within 2.70V to 2.84V over temperature, ensuring compatibility with 2.8V nominal logic interfaces.
Can MAX8860EUA27+ operate from a single alkaline cell?
No, MAX8860EUA27+ requires a minimum 2.5V input, while a fresh alkaline cell starts at ~1.6V and drops rapidly. It is designed for single Li-ion (3.0–4.2V), Li-polymer, or dual-NiMH (2.4–3.0V) sources. Using it with alkaline would result in immediate dropout and FAULT assertion.
How does the FAULT pin behave during thermal shutdown?
During thermal shutdown, the MAX8860EUA27+ FAULT pin goes low (open-drain active-low) to indicate loss of regulation-identical to its behavior during dropout or current-limit conditions. The pin returns high-impedance only after junction temperature cools below 150°C (170°C – 20°C hysteresis) and regulation resumes.
Is an external capacitor required on the CC pin for stable operation of MAX8860EUA27+?
Yes, a 33nF capacitor must be connected between the CC pin and GND for stable operation. Omitting it causes excessive output noise, poor load transient response, and potential oscillation. The capacitor value is trimmed to optimize loop compensation and cannot be omitted or substituted with generic values.
What is the minimum load current required for MAX8860EUA27+ when input voltage exceeds 5.5V?
When VIN > 5.5V, MAX8860EUA27+ requires a minimum load current of 50µA in preset (2.77V) mode to maintain regulation. This prevents instability caused by internal bias current limitations at high input voltages; the requirement does not apply below 5.5V or in adjustable mode.
MAX8860EUA27+ 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:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 1.25V (2.77V)
- Voltage - Output (Max):
- 6.5V
- Voltage Dropout (Max):
- 0.155V @ 300mA (Typ)
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 270 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Fault Output
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX8860EUA27+ FAQ
1.How can I place an order for MAX8860EUA27+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8860EUA27+ 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 MAX8860EUA27+ reliable?
The price and inventory of MAX8860EUA27+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8860EUA27+ is usually 5 days.
3.What payment methods are accepted for MAX8860EUA27+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8860EUA27+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8860EUA27+?
MAX8860EUA27+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8860EUA27+ 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 MAX8860EUA27+?
For technical support, including MAX8860EUA27+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8860EUA27+ requirements.
6.How does Aetrix verify that MAX8860EUA27+ is sourced from the original manufacturer or authorized distributors?
All MAX8860EUA27+ 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 MAX8860EUA27+ meets industry standards.
7.What is the process for return or replacement of MAX8860EUA27+?
All MAX8860EUA27+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8860EUA27+, 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 MAX8860EUA27+ part is unused and in its original packaging.
Return procedure for MAX8860EUA27+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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