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Analog Devices Inc./Maxim Integrated MAX860EUA
- Part No.:
- MAX860EUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX860EUA.pdf
- Description:
- IC REG CHARGE PUMP 50MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,455
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Product details
Overview
MAX860EUA from Maxim Integrated is a frequency-selectable switched-capacitor voltage converter that inverts +1.5V to +5.5V inputs or doubles +2.5V to +5.5V inputs, delivering up to 50mA output with 12Ω output resistance, 87% efficiency at full load, and 200µA quiescent current - ideal for portable medical instruments and handheld test equipment requiring compact, inductorless negative/positive rail generation.
For engineers reviewing the MAX860EUA datasheet, MAX860EUA pinout, MAX860EUA application, or MAX860EUA equivalent, this device offers three user-selectable switching frequencies (6/50/130 kHz), active-low shutdown (<1µA), low-voltage operation support, and µMAX-8 packaging - enabling precise trade-offs between capacitor size, EMI, and quiescent power in space-constrained battery-powered systems.
Technical Context
The MAX860EUA implements a charge-pump topology with internal MOSFET switches driven directly at oscillator frequency (no division), supporting both inverting and doubling modes via LV pin configuration. Its FC pin selects one of three discrete switching frequencies without external components.
Output regulation is unregulated but highly predictable: output voltage droop follows VOUT = –VIN + (IOUT × ROUT), where ROUT ≈ 12Ω (including 0.2Ω capacitor ESR) and is stable across temperature and supply voltage. Shutdown disables all active circuitry, reducing supply current to <1µA while preserving reverse-current paths depending on load connection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 50mA maximum continuous - supports moderate-power op-amp supplies and interface rails without inductors. |
| Switching Frequencies | 6kHz / 50kHz / 130kHz - selectable via FC pin; enables optimization of capacitor size vs. EMI vs. quiescent current. |
| Quiescent Current | 200µA typical - minimizes standby drain in battery-critical applications like portable diagnostics. |
| Shutdown Current | <1µA - ensures negligible battery leakage during system sleep modes. |
| Output Resistance | 12Ω typical - defines predictable load-dependent voltage droop (e.g., –5.0V → –4.4V at 50mA). |
| Input Voltage Range | +1.5V to +5.5V (inverter), +2.5V to +5.5V (doubler) - compatible with single-cell Li-ion, alkaline, and 3.3V/5V logic rails. |
| Efficiency | 87% at 50mA load - exceeds ICL7660/MAX660 performance while eliminating magnetic components. |
Pinout & Package
MAX860EUA is housed in an 8-pin µMAX package (3.05mm × 3.05mm × 1.11mm), optimized for high-density PCB layouts and thermal performance in portable systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FC (Pin 1) | Frequency control input | Selects switching frequency: FC=VDD→6kHz, FC=GND→50kHz, FC=OUT→130kHz. |
| C1+ (Pin 2) | Flying capacitor positive terminal | Connects to positive plate of C1; forms charge-transfer path during pump cycle. |
| GND (Pin 3) | Ground reference | Primary return path for internal switches and external capacitors; must be low-impedance. |
| C1– (Pin 4) | Flying capacitor negative terminal | Connects to negative plate of C1; alternates polarity with C1+ to enable voltage inversion/doubling. |
| OUT (Pin 5) | Output terminal | Delivers inverted (–VIN) or doubled (+2VIN) voltage; connects to load and reservoir capacitor C2. |
| LV (Pin 6) | Low-voltage operation mode select | LV=GND→inverter mode; LV=OUT→doubler mode; floating allowed only for VIN >3V in inverter config. |
| SHDN (Pin 7) | Active-low shutdown control | Drives low to disable all switching; connect to VDD if unused in inverter mode. |
| VDD (Pin 8) | Positive input supply | Accepts +1.5V to +5.5V; powers internal oscillator and switches; must be bypassed near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless architecture | Eliminates magnetic components, reducing BOM cost, board area, and EMI concerns versus switching regulators. |
| Three-frequency selection | Enables EMI avoidance by shifting fundamental noise away from sensitive bands (e.g., audio, RF sections). |
| Low quiescent current | 200µA typical operation enables >1-year battery life in always-on portable instrumentation. |
| High-frequency operation | 130kHz max switching allows use of small 4.7µF ceramic capacitors instead of bulky 10µF electrolytics. |
| Robust shutdown behavior | <1µA shutdown current with defined reverse-current paths prevents unintended loading of input supply. |
Applications
| Portable Medical Sensors | Handheld Test Equipment |
|---|---|
Use Scenario: Powering dual-rail op-amps in battery-operated ECG front-ends requiring ±2.5V from a single 3.7V Li-ion cell. IC Role / Device Role / Timing Role: Inverting charge pump generating clean –2.5V rail with minimal ripple and no inductor-induced noise. Use Value: Enables high-precision analog signal conditioning without compromising ECG signal integrity or battery runtime. |
Use Scenario: Providing isolated ±5V rails for LCD bias and analog front-end in pocket-sized multimeters. IC Role / Device Role / Timing Role: Dual-mode operation: inverter for negative rail, doubler for positive rail - sharing one IC footprint. Use Value: Reduces component count and PCB area by 30% versus discrete inverter + LDO solutions. |
| Industrial Interface Modules | Low-Power Data Acquisition |
Use Scenario: Generating RS-232-compatible ±10V levels from a 3.3V microcontroller supply in isolated field transceivers. IC Role / Device Role / Timing Role: Cascaded MAX860EUA devices producing –10V output with controlled output resistance. Use Value: Achieves legacy interface compliance without external transformers or high-voltage DC-DC converters. |
Use Scenario: Supplying ±3.3V to precision ADC drivers in wireless sensor nodes operating from coin-cell batteries. IC Role / Device Role / Timing Role: Low-noise inverter with FC=GND (50kHz) to minimize switching interference with 24-bit sigma-delta conversion. Use Value: Maintains ENOB >20 bits by limiting supply ripple to <1mVpp under 10mA dynamic load. |
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 |
|---|---|---|---|
| MAX660CPA | 100mA output, 5/40kHz switching, 6.5Ω output resistance, PDIP-8 package | Higher current, lower frequency - better for low-EMI, high-load industrial sensors | Choose MAX660CPA when >50mA load or lower EMI floor is required; not pin-compatible with MAX860EUA. |
| ICL7660SAKO | 10mA output, 5kHz fixed frequency, 55Ω output resistance, SO-8 package | Lower cost, lower performance - suitable for low-current logic-level shifting | Choose ICL7660SAKO only for sub-5mA loads where size and efficiency are secondary to unit cost. |
Compared with MAX660CPA and ICL7660SAKO, the MAX860EUA delivers optimal balance of output current, frequency flexibility, and µMAX footprint - making it the preferred choice for modern portable instrumentation where board space, battery life, and EMI control are co-constrained.
Availability
MAX860EUA is available at Aetrix Electronics and suitable for portable medical instruments, handheld test equipment, industrial interface modules, and low-power data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX860EUA 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, medical, and communications applications.
The MAX860EUA belongs to Maxim's switched-capacitor voltage converter product line, engineered specifically to replace inductive DC-DC solutions in space- and noise-sensitive portable electronics.
FAQ
What is the maximum output current capability of the MAX860EUA?
The MAX860EUA delivers up to 50mA continuous output current in both inverting and doubling configurations. This rating assumes proper capacitor selection (e.g., 10µF low-ESR types), ambient temperature ≤+85°C, and adequate PCB copper pour for thermal dissipation. Peak transient current may reach 60mA for short durations without damage, per absolute maximum ratings.
How does the FC pin affect MAX860EUA performance?
The FC pin on the MAX860EUA selects one of three discrete switching frequencies: 6kHz (FC=VDD), 50kHz (FC=GND), or 130kHz (FC=OUT). Higher frequencies reduce required capacitor size and output ripple but increase quiescent current; lower frequencies improve efficiency at light loads and minimize EMI in sensitive bands. The choice directly impacts C1/C2 sizing and system-level noise profile.
Can the MAX860EUA operate from a 1.5V supply?
Yes, the MAX860EUA supports input voltages from +1.5V to +5.5V in inverter mode (LV=GND) and from +2.5V to +5.5V in doubler mode (LV=OUT). At 1.5V input, it generates –1.5V nominal output with ~12Ω output resistance - sufficient for low-voltage analog circuits such as rail-to-rail op-amps in ultra-low-power sensor nodes.
What is the purpose of the LV pin on the MAX860EUA?
The LV pin on the MAX860EUA configures operational mode: connecting LV to GND enables voltage inversion (VOUT ≈ –VIN); connecting LV to OUT enables voltage doubling (VOUT ≈ +2VIN). In inverter mode with VIN >3V, LV may be left floating for compatibility with legacy MAX660 footprints, but this is not recommended for VIN <3V due to potential instability.
Does the MAX860EUA require external diodes or inductors?
No, the MAX860EUA is a fully integrated switched-capacitor converter requiring only two external capacitors (C1 and C2) - no external diodes, inductors, or resistors are needed. Its internal MOSFET switches and oscillator eliminate magnetic components entirely, simplifying layout and reducing EMI compared to inductive DC-DC solutions.
MAX860EUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- 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):
- -
- 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 FAQ
1.How can I place an order for MAX860EUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX860EUA 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 reliable?
The price and inventory of MAX860EUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX860EUA is usually 5 days.
3.What payment methods are accepted for MAX860EUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX860EUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX860EUA?
MAX860EUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX860EUA 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?
For technical support, including MAX860EUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX860EUA requirements.
6.How does Aetrix verify that MAX860EUA is sourced from the original manufacturer or authorized distributors?
All MAX860EUA 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 meets industry standards.
7.What is the process for return or replacement of MAX860EUA?
All MAX860EUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX860EUA, 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 part is unused and in its original packaging.
Return procedure for MAX860EUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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