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Part Number: ADM8829

 

MFG: ADI

 

D/C: 09

Description: The ADM8828/ADM8829 is a charge-pump voltage inverter which may be used to generate a negative supply from a positive i...


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ADM8829 General Description


The ADM8828/ADM8829 is a charge-pump voltage inverter which may be used to generate a negative supply from a positive input. Input voltages ranging from +1.5 V to +5.5 V can be inverted into a negative 1.5 V to 5.5 V output supply. This inverting scheme is ideal for generating a negative rail in single power-supply systems. Only two small external capacitors are needed for the charge pump. Output currents up to 25 mA with greater than 99% efficiency are achievable.

The ADM8828 also features a low power shutdown (SHDN) pin. This can be used to disable the device and reduce the quiescent current to 20 nA.

The ADM8828/ADM8829 is available in a 6-lead SOT-23 package.

ADM8829 Maximum Ratings

(TA = +25°C unless otherwise noted)
Input Voltage (IN to GND) . . . . . . . . . . . . . . . 0.3 V to +6 V
OUT to GND . . . . . . . . . . . . . . . . . . . . . . . . .6.0 V to +0.3 V
OUT, IN Output Current (Continuous) . . . . . . . . . . . ... 50 mA
Output Short Circuit Duration to GND . . . . . . . . . . . ...10 secs
Power Dissipation, RT-6 . . . . . . . . . . . . . . . . . . . . . .. 570 mW
   (Derate 8.3 mW/°C above +70°C)
   JA, Thermal Impedance . . . . . . . . . . . . . . . . . . . .120°C/W
Operating Temperature Range
   Industrial (A Version) . . . . . . . . . . . . . . . 40°C to +85°C
   Storage Temperature Range . . . . . . . . .65°C to +150°C
Lead Temperature Range (Soldering 10 sec) . . . . . .. +300°C
   Vapor Phase (70 sec) . . . . . . . . . . . . . . . . . . . . . . . +215°C
   Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . .  . . . . +220°C
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>3500 V

*This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ADM8829 Features

Inverts Input Supply Voltage
99% Voltage Conversion Efficiency
25 mA Output Current
Shutdown Function
Requires Only Two Capacitors
1 F Capacitors
18 Output Resistance
+1.5 V to +5.5 V Input Range
600 A Quiescent Current
20 nA Shutdown Current (ADM8828)

ADM8829 Typical Application

Handheld Instruments
LCD Panels
Cellular Phones
PDAs
Remote Data Acquisition
Op Amp Power Supplies

ADM8829 Connection Diagram

ADM8829  Connection Diagram

ADM8829 datasheet

ADM8829
PDF/DataSheet Download

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