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Part Number: MAX870
Description: The ultra-small MAX870/MAX871 monolithic, CMOS charge-pump inverters accept input voltages ranging fro...
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MAX870
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DataSheet
General Description
MAX870 General Description
The ultra-small MAX870/MAX871 monolithic, CMOS charge-pump inverters accept input voltages ranging from +1.4V to +5.5V. The MAX870 operates at 125kHz, and the MAX871 operates at 500kHz. Their high efficiency (90%) and low operating current (0.7mA for the MAX870) make these devices ideal for both battery-powered and board-level voltage-conversion applications.
Oscillator control circuitry and four power MOSFET switches are included on-chip. A typical MAX870/ MAX871 application is generating a -5V supply from a +5V logic supply to power analog circuitry. Both parts come in a 5-pin SOT23-5 package and can deliver 25mA with a voltage drop of 500mV.
For applications requiring more power, the MAX860 delivers up to 50mA with a voltage drop of 600mV, in a space-saving MAX package.
MAX870 Maximum Ratings
IN to GND..............................................................+6.0V to -0.3V
OUT to GND ..........................................................-6.0V to +0.3V
C1+..............................................................(VIN + 0.3V) to -0.3V
C1-............................................................(VOUT - 0.3V) to +0.3V
OUT Output Current ...........................................................50mA
OUT Short Circuit to GND .............................................Indefinite
Continuous Power Dissipation (TA = +70°C)
SOT23-5 (derate 7.1mW/°C above +70°C)................571mW
Operating Temperature Range
MAX870EUK/MAX871EUK ...............................-40°C to +85°C
Storage Temperature Range ...........................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
OUT to GND ..........................................................-6.0V to +0.3V
C1+..............................................................(VIN + 0.3V) to -0.3V
C1-............................................................(VOUT - 0.3V) to +0.3V
OUT Output Current ...........................................................50mA
OUT Short Circuit to GND .............................................Indefinite
Continuous Power Dissipation (TA = +70°C)
SOT23-5 (derate 7.1mW/°C above +70°C)................571mW
Operating Temperature Range
MAX870EUK/MAX871EUK ...............................-40°C to +85°C
Storage Temperature Range ...........................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
MAX870 Features
· 5-Pin SOT23-5 Package
· 99% Voltage Conversion Efficiency
· Invert Input Supply Voltage
· 0.7mA Quiescent Current (MAX870)
· +1.4V to +5.5V Input Voltage Range
· Require Only Two Capacitors
· 25mA Output Current
· Shutdown Control
· 99% Voltage Conversion Efficiency
· Invert Input Supply Voltage
· 0.7mA Quiescent Current (MAX870)
· +1.4V to +5.5V Input Voltage Range
· Require Only Two Capacitors
· 25mA Output Current
· Shutdown Control
MAX870 Typical Application
·Local -5V Supply from 5V Logic Supply
·Small LCD Panels
·Cell Phones
·Medical Instruments
·Handy-Terminals, PDAs
·Battery-Operated Equipment
·Small LCD Panels
·Cell Phones
·Medical Instruments
·Handy-Terminals, PDAs
·Battery-Operated Equipment
MAX870 Connection Diagram
MAX870
PDF/DataSheet Download
- Datasheet: MAX870
- File Size: 100169 KB
- Manufacturer: MAXIM [Maxim Integrated Products]
- Click here to Download
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