MAX629ESA+ Maxim Integrated Products, MAX629ESA+ Datasheet
MAX629ESA+
Specifications of MAX629ESA+
Related parts for MAX629ESA+
MAX629ESA+ Summary of contents
Page 1
... ISET FB POL MAX629 REF GND POSITIVE OUTPUT VOLTAGE ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 28V, Low-Power, High-Voltage, ____________________________Features Internal, 500mA, 28V N-Channel Switch (No External FET Required) Generates Positive or Negative Output Voltages 80µA Supply Current 1µ ...
Page 2
Low-Power, High-Voltage, Boost or Inverting DC-DC Converter ABSOLUTE MAXIMUM RATINGS Supply Voltage (V to GND) ..................................-0.3V to +6V CC SHDN to GND...........................................................-0.3V to +6V ISET, REF, FB, POL to GND .......................-0. GND ..............................................................-0.3V to +30V ...
Page 3
Boost or Inverting DC-DC Converter ELECTRICAL CHARACTERISTICS (continued +5V 0.1µ -40°C to +85°C, unless otherwise noted. Typical values are REF A PARAMETER REF Load Regulation I Circuit of Figure 2, V ...
Page 4
Low-Power, High-Voltage, Boost or Inverting DC-DC Converter ____________________________Typical Operating Characteristics (continued) (SHDN = 0.1µ +25°C, unless otherwise noted.) CC REF A SUPPLY CURRENT vs. INPUT VOLTAGE 700 600 ...
Page 5
Boost or Inverting DC-DC Converter ______________________________________________________________Pin Description PIN NAME Active-Low Shutdown Input. A logic low puts the MAX629 in shutdown mode and reduces supply current to SHDN 1 1µA. Polarity Input. Changes polarity and threshold allow regulation ...
Page 6
Low-Power, High-Voltage, Boost or Inverting DC-DC Converter POL 1.25V REF REF ERROR AMP FB COMPARATOR 1V SHDN CONTROL V CC GND Figure 1. Functional Diagram without a significant loss of accuracy. Begin by select- ing ...
Page 7
Boost or Inverting DC-DC Converter Setting the Current Limit External current-limit selection provides added control over the MAX629’s output performance. A higher cur- rent limit increases the amount of energy stored in the inductor during each cycle, which provides a ...
Page 8
Low-Power, High-Voltage, Boost or Inverting DC-DC Converter Diode Selection The MAX629’s high switching frequency demands a high-speed rectifier. Schottky diodes, such as the 1N5819 or MBR0530L, are recommended. Make sure that the diode’s peak current rating exceeds the peak ...
Page 9
Boost or Inverting DC-DC Converter FB MAX629 GND (REF ARE FOR NEGATIVE OUTPUT VOLTAGE CONFIGURATIONS. Figure 4. Adjustable Output Voltage increasing usable battery life. Using separate supplies for V and V also reduces noise injection onto V CC ...
Page 10
Low-Power, High-Voltage, Boost or Inverting DC-DC Converter __________________Pin Configuration TOP VIEW SHDN 1 8 POL 2 7 MAX629 3 6 REF ______________________________________________________________________________________ ___________________Chip Information TRANSISTOR COUNT: 653 SUBSTRATE CONNECTED TO GND ...
Page 11
Boost or Inverting DC-DC Converter ________________________________________________________Package Information ______________________________________________________________________________________ 28V, Low-Power, High-Voltage, 11 ...
Page 12
Low-Power, High-Voltage, Boost or Inverting DC-DC Converter 12 ______________________________________________________________________________________ NOTES ...