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Analog Devices Inc./Maxim Integrated MAX860EUA+T
- Part No.:
- MAX860EUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX860EUA+T.pdf
- Description:
- IC REG CHARG PUMP INV 50MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,456
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Product details
Overview
MAX860EUA+T from Maxim Integrated is a frequency-selectable, 50mA switched-capacitor voltage converter that inverts +1.5V to +5.5V inputs or doubles +2.5V to +5.5V inputs. It operates at selectable switching frequencies of 6kHz, 50kHz, or 130kHz, delivers 87% efficiency at 50mA load, and features 12Ω output resistance and 200µA quiescent current. It serves as a compact, inductorless power solution for portable medical instruments and handheld test equipment.
For engineers reviewing the MAX860EUA+T datasheet, MAX860EUA+T pinout, MAX860EUA+T application, or MAX860EUA+T equivalent, key selection criteria include its three-frequency control (FC) pin, active-low shutdown (<1µA), µMAX-8 package compatibility, and ±1.5V to ±5.5V input/output voltage flexibility in inverter/doubler modes.
Technical Context
The MAX860EUA+T implements a BiCMOS charge-pump architecture with direct oscillator-to-switch coupling-no frequency division-enabling precise frequency selection via FC pin states (VDD, GND, or OUT). Its LV pin configures mode: grounded for inverting operation, connected to OUT for doubling.
It uses two external flying/output capacitors (C1/C2) and achieves regulated-like performance without feedback, relying on fixed internal switch resistance (~8Ω) and predictable ROUT = RO + 4×ESRC1 + ESRC2 + 1/(fS×C1). Shutdown disables all active circuitry, reducing supply current to <1µA while preserving reverse-current paths depending on load topology.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 50mA maximum continuous output-sufficient to replace inductive regulators in low-noise, space-constrained applications. |
| Switching Frequencies | 6kHz / 50kHz / 130kHz-selected by FC pin state; higher frequencies reduce required capacitor size but increase quiescent current. |
| Efficiency | 87% at 50mA load-enables battery-powered operation with minimal thermal impact and no inductor losses. |
| Quiescent Current | 200µA typical-supports ultra-low-power standby in portable instrumentation and sensor nodes. |
| Output Resistance | 12Ω typical (with 10µF/0.2Ω ESR caps)-defines voltage droop: e.g., −5.0V no-load → −4.4V at 50mA load from +5V input. |
| Shutdown Current | <1µA-enables system-level power gating without auxiliary circuitry or leakage concerns. |
| Input Voltage Range | +1.5V to +5.5V (inverter); +2.5V to +5.5V (doubler)-covers single-cell Li-ion, alkaline, and 3.3V/5V rail domains. |
Pinout & Package
MAX860EUA+T is housed in an 8-pin µMAX® package (1.11mm height, 3mm × 3mm footprint), RoHS-compliant, with exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FC | Frequency Control input | Selects switching frequency: FC = VDD → 6kHz; FC = GND → 50kHz; FC = OUT → 130kHz. |
| 2 C1+ | Flying capacitor positive terminal | Connects to positive plate of pump capacitor C1; forms charge-transfer path during switching cycle. |
| 3 GND | Ground reference | Primary return path for internal switches and external capacitors; must be low-impedance. |
| 4 C1− | Flying capacitor negative terminal | Connects to negative plate of pump capacitor C1; alternates polarity with C1+ to enable charge transfer. |
| 5 OUT | Inverted or doubled output | Delivers −VIN (LV = GND) or +2×VIN (LV = OUT); rated for 50mA continuous, 60mA peak. |
| 6 LV | Mode configuration input | LV = GND → inverter; LV = OUT → doubler; floating allowed only for ≥3V inputs in inverter mode. |
| 7 SHDN | Active-low shutdown control | Drives low to disable device; draws <1µA; connect to VDD if unused in inverter mode. |
| 8 VDD | Positive supply input | Accepts +1.5V to +5.5V (inverter) or +2.5V to +5.5V (doubler); powers internal oscillator and switches. |
Key Features
| Feature | Design Value |
|---|---|
| Three-frequency selection | Enables noise-sensitive designs to avoid interference bands (e.g., 6kHz avoids audio range; 130kHz shifts switching harmonics above RF receivers). |
| Inductorless architecture | Eliminates magnetic components, EMI filters, and layout sensitivity-reducing BOM count and PCB area by >30% vs. buck-boost solutions. |
| Low quiescent current | 200µA operation enables multi-year battery life in always-on medical sensors and portable diagnostics. |
| 1µA shutdown mode | Supports deep-sleep MCU states without external power switches or level shifters. |
| ±1.5V to ±5.5V operating range | Covers legacy 5V systems, modern 3.3V logic, and emerging 1.8V/2.5V analog rails-minimizing need for multiple converters. |
Applications
| Portable Medical Sensors | Handheld Test Equipment |
|---|---|
|
Use Scenario: Battery-powered ECG front-end requiring dual ±5V rails from a single 3.7V Li-ion cell. IC Role / Device Role / Timing Role: MAX860EUA+T generates clean −5V rail via inverter mode (LV = GND) while sharing C1/C2 with companion op-amp supply. Use Value: Eliminates bulky inductors and reduces board area by 40% versus discrete DC/DC modules, meeting IEC 60601 creepage requirements. |
Use Scenario: Digital multimeter needing stable ±3.3V for ADC reference and display driver from 9V alkaline battery. IC Role / Device Role / Timing Role: MAX860EUA+T operates in doubler mode (LV = OUT) to generate +6.6V, then feeds linear regulator for precision ±3.3V. Use Value: Achieves 87% efficiency at 20mA load-extending battery life 2.3× over resistor-zener solutions while maintaining <10mV ripple. |
| Industrial Interface Modules | Operational Amplifier Supplies |
|
Use Scenario: RS-485 transceiver module requiring isolated ±5V bias for fail-safe termination in factory automation PLCs. IC Role / Device Role / Timing Role: MAX860EUA+T provides −5V rail in inverter mode, synchronized to system clock via FC pin to suppress conducted EMI into CAN bus lines. Use Value: 130kHz FC setting reduces 10µF capacitor size by 75% vs. 6kHz mode-enabling 0805 ceramic placement and lowering cost by $0.18/unit. |
Use Scenario: Low-noise instrumentation amplifier stage needing symmetric ±15V supplies from +12V input in portable oscilloscope front-end. IC Role / Device Role / Timing Role: Two MAX860EUA+T devices cascade (Figure 1) to generate −12V, then feed LDOs for precision ±15V rails. Use Value: Cascaded configuration achieves 2.4Ω effective output resistance-cutting voltage droop to <100mV at 30mA, critical for THD <−100dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX861EUA+T | Higher base frequencies: 13kHz/100kHz/250kHz; identical pinout, package, and electrical specs except fS. | Better suited for high-frequency noise environments (e.g., near RF transceivers) where 130kHz may interfere; requires re-optimization of C1/C2 values. | Select MAX861EUA+T when system EMI profile demands minimum switching frequency >100kHz and capacitor size reduction is prioritized over quiescent current. |
| MAX660CPA+ | 100mA output, 6.5Ω output resistance, fixed 5kHz/40kHz dual-frequency; SO-8 package only; no FC or LV pins. | Higher current capability but lower efficiency at light loads (2.6mA no-load vs. 200µA); lacks mode/frequency flexibility. | Choose MAX660CPA+ only when 100mA output is mandatory and design can accept larger capacitors, higher quiescent draw, and fixed frequency operation. |
Compared with MAX860EUA+T, MAX861EUA+T offers higher-frequency operation for tighter EMI control but increases supply current, while MAX660CPA+ delivers more current with simpler control but sacrifices efficiency, flexibility, and package options.
Availability
MAX860EUA+T is available at Aetrix Electronics and suitable for portable medical instruments, handheld test equipment, industrial interface modules, and operational amplifier supplies requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX860EUA+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, medical, and communications applications.
The MAX860/MAX861 product line was designed specifically to replace aging ICL7660-based solutions with higher efficiency, wider input range, and programmable frequency-targeting space- and power-constrained portable electronics.
FAQ
What is the maximum continuous output current of the MAX860EUA+T?
The MAX860EUA+T delivers up to 50mA continuous output current in both inverter and doubler configurations. Absolute maximum ratings specify 60mA peak, but sustained operation above 50mA risks exceeding thermal limits in the µMAX package. Derating is recommended above +70°C ambient per the 4.2mW/°C thermal coefficient.
How does the FC pin select switching frequency on the MAX860EUA+T?
The FC pin on the MAX860EUA+T selects one of three discrete switching frequencies: FC = VDD or open → 6kHz; FC = GND → 50kHz; FC = OUT → 130kHz. These frequencies are fixed per device variant and verified in the Electrical Characteristics table; no external resistor or clock signal is required.
Can the MAX860EUA+T be used as a voltage doubler, and what is required?
Yes, the MAX860EUA+T operates as a voltage doubler when the LV pin is connected to the OUT pin. Input voltage must be between +2.5V and +5.5V, and the output will be approximately +2×VIN under no load. Output droop follows the same ROUT model as in inverter mode, with identical 12Ω typical output resistance.
What is the shutdown current specification for the MAX860EUA+T?
The MAX860EUA+T draws less than 1µA supply current when the SHDN pin is driven low. This shutdown state disables all internal oscillator and switching activity while preserving pin states. The device exits shutdown in under 500µs when SHDN is returned high, as confirmed in the Electrical Characteristics table.
Is the MAX860EUA+T pin-compatible with the ICL7660 or MAX660?
No, the MAX860EUA+T is not pin-compatible with the ICL7660 or MAX660 due to functional pin reassignments: pin 1 is FC (not OSC), pin 6 is LV (not NC), and pin 7 is SHDN (not OSC). Direct socket replacement requires at minimum rewiring of pins 1 and 7, and proper LV connection per operating mode.
MAX860EUA+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:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive or Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V, 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 50mA
- Frequency - Switching:
- 6kHz, 50kHz, 130kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX860EUA+T FAQ
1.How can I place an order for MAX860EUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX860EUA+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 MAX860EUA+T reliable?
The price and inventory of MAX860EUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX860EUA+T is usually 5 days.
3.What payment methods are accepted for MAX860EUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX860EUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX860EUA+T?
MAX860EUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX860EUA+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 MAX860EUA+T?
For technical support, including MAX860EUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX860EUA+T requirements.
6.How does Aetrix verify that MAX860EUA+T is sourced from the original manufacturer or authorized distributors?
All MAX860EUA+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 MAX860EUA+T meets industry standards.
7.What is the process for return or replacement of MAX860EUA+T?
All MAX860EUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX860EUA+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 MAX860EUA+T part is unused and in its original packaging.
Return procedure for MAX860EUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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