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MAX860, MAX861
50mA, Frequency-Selectable, Switched-Capacitor Voltage Converters

Inductorless Inverter/Positive Doubler Switches Up to 250kHz


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Data Sheet
FULL DATA SHEET (PDF, 496kB)
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Description
The MAX860/MAX861 charge-pump voltage converters invert input voltages ranging from +1.5V to +5.5V, or double input voltages ranging from +2.5V to +5.5V. Because of their high switching frequencies, these devices use only two small, low-cost capacitors. Their 50mA output makes switching regulators unnecessary, eliminating inductors and their associated cost, size, and EMI. Greater than 90% efficiency over most of the load-current range, combined with a typical operating current of only 200µA (MAX860), provides ideal performance for both battery-powered and board-level voltage-conversion applications.

A frequency-control (FC) pin provides three switching-frequencies to optimize capacitor size and quiescent current and to prevent interference with sensitive circuitry. Each device has a unique set of three available frequencies. A shutdown (active-low SHDN) pin reduces current consumption to less than 1µA. The MAX860/MAX861 are suitable for use in applications where the ICL7660 and MAX660's switching frequencies are too low. The MAX860/MAX861 are available in 8-pin µMax and SO packages.

Key Features   Applications/Uses
  • 8-Pin, 1.11mm High µMAX Package
  • Invert or Double the Input Supply Voltage
  • Three Selectable Switching Frequencies
  • High Frequency Reduces Capacitor Size
  • 87% Efficiency at 50mA
  • 200µA Quiescent Current (MAX860)
  • 1µA Shutdown Supply Current
  • 600mV Voltage Drop at 50mA Load
  • 12Ω Output Resistance

 
  • Handheld Instruments (PDAs, Palmtops)
  • Interface Power Supplies
  • Medical Instruments
  • Operational Amplifier Power Supplies
  • Portable Computing

    Key Specifications:   Charge Pumps
    Part Number Topology VIN (min) (V) VIN (max) (V) Operating Current, ICC (max) (mA) Unadjusted VOUT (V) IOUT (typ) (A) Operating Frequency (kHz) Features RoHS Available Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C) Price**
    MAX860  Doubler
    Inverter
    Unregulated
    1.5 5.5 0.3 +2xVIN
    -VIN
    0.05 130
    Shutdown
    Yes Ceramic DIP/8
    PDIP/8
    SOIC/8
    uMAX/8
    16 -40 to +85
    -55 to +125
    0 to +70
    $1.12 @ 1k
    MAX861  0.4 250 Ceramic DIP/8
    SOIC/8
    uMAX/8
    $1.12 @ 1k
    See All Charge Pumps (50)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX860, MAX861: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  • Application Note 656: Design Trade-Offs for Single-Supply Op Amps - MAX861
  • Application Note 725: DC/DC Conversion without Inductors - MAX860, MAX861
  • Application Note 1783: Two AA Cells Power Dual-Supply µP - MAX860

    Evaluation Kits
    none

    Design Guides
  • REFERENCE (PDF)
  • TEMP SENSORS (PDF)
  • WIRELESS (PDF)

    Reliability Reports
  • Show FIT data for:
  • Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-38 of 38

    MAX860 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX860MJA  
    Ceramic DIP;8 pin;81 mm²
    Dwg: 21-0045
    Use pkgcode/variation: J8-2*
    -55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX860CPA  
    PDIP;8 pin;82 mm²
    Dwg: 21-0043
    Use pkgcode/variation: P8-1*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX860CSA+  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+4*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX860CSA  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-4*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX860ESA+T  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX860ESA+  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX860ESA-T  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX860ESA  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX860ISA  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-4*
    -20°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX860ISA+T  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+4*
    -20°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX860ISA+  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+4*
    -20°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX860ISA-T  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-4*
    -20°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX860CUA+  
    uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    0°C to +70°C See data sheet
    Materials Analysis
    MAX860EUA+T  



    -40°C to +85°C See data sheet
    MAX860EUA+  
    uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX860CUA  
    uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX860IUA  
    uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    -20°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX860IUA-T  
    uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    -20°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX860IUA+T  
    uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    -20°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX860IUA+  
    uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    -20°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX861 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX861MJA  
    Ceramic DIP;8 pin;81 mm²
    Dwg: 21-0045
    Use pkgcode/variation: J8-2*
    -55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX861CSA+  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+4*
    -20°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX861ESA+  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX861ESA+T  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX861ESA  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX861ESA-T  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX861CSA  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-4*
    -20°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX861ISA+  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+4*
    -20°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX861ISA+T  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8+4*
    -20°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX861ISA-T  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-4*
    -20°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX861ISA  
    SOIC;8 pin;31 mm²
    Dwg: 21-0041B (PDF)
    Use pkgcode/variation: S8-4*
    -20°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX861CUA+  
    uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX861CUA+T  



    0°C to +70°C See data sheet
    MAX861CUA  
    uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX861IUA+  
    uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    -20°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX861IUA  
    uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    -20°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX861IUA-T  
    uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8-1*
    -20°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX861IUA+T  
    uMAX;8 pin;16 mm²
    Dwg: 21-0036J (PDF)
    Use pkgcode/variation: U8+1*
    -20°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Related Products
    MAX1680, MAX1681 125mA, Frequency-Selectable, Switched-Capacitor Voltage Converters

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    Document Ref.: 19-0239; Rev 2; 2003-05-15
    This page last modified: 2007-06-07



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