Datasheet CAT102TDI-GT3 (ON Semiconductor) - 5
| Manufacturer | ON Semiconductor |
| Description | Precision, Adjustable Shunt Regulator (600 mV Reference) |
| Pages / Page | 9 / 5 — CAT102. APPLICATIONS INFORMATION. onsemi. Figure 1. Application circuits … |
| File Format / Size | PDF / 1.0 Mb |
| Document Language | English |
CAT102. APPLICATIONS INFORMATION. onsemi. Figure 1. Application circuits for 0.6 V output and 1.2 V output voltages
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CAT102 APPLICATIONS INFORMATION
The CAT102 adjustable shunt regulator features The current limit can be adjusted by using a resistor R3 isolated supply inputs and outputs, ideal for isolated connected between the IN and OUT pins. For example, power-supply applications using an optocoupler in a 3.3 V supply VIN is associated with R3 = 135 Ω, and a the feedback path. The CAT102 sinks 20 mA with 10 V supply works best with R3 = 470 Ω. The CAT102 VOUT at 0.3 V. The wide input supply range allows shunt regulator is limited to low-current applications with the device to operate from 2.2 V to 18 V. The the OUT pin capable of sinking up to 20 mA max. CAT102 compares the FB input to a precision 600mV reference. If the FB input is low, the OUT pin sinks no current. If FB rises above 600 mV, the OUT pin sinks up to 20 mA. Figure 1 shows the CAT102 configured as a shunt regulator. To generate an output voltage of 0.6 V, the FB pin has to be directly connected to the OUT pin. A 1.0 µF capacitor from OUT to GND is recommended when the output voltage is 0.6 V. A resistor-divider connected from OUT to GND is used to produce a higher output voltage as set by the following equation: VOUT = (1 + R1/R2) x 0.6 V
onsemi
TION
Figure 1. Application circuits for 0.6 V output and 1.2 V output voltages
YOUR V R IN 3 VOUT R INFORMA 3.3V 0.6V/20mA ACT 5 3 RECOMMENDED FOR NEW DESIGN IN OUT C1 C2 CONT
CAT102
0.1µF 1µF 2 1 ATIVE FO GND FB
DISCONTINUED
PLEASE V R IN 3 VOUT = (1 + R1/R2) x 0.6V THIS DEVICE IS NOT REPRESENT 3.3V 1.2V/20mA 5 3 IN OUT C1 C R 2 1
CAT102
0.1µF 10kΩ 1µF 2 1 GND FB R2 10kΩ Doc. No. MD-4007 Rev. 17 4 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice Document Outline CAT102 Precision, Adjustable Shunt Regulator (600 mV Reference) FEATURES APPLICATION DESCRIPTION FUNCTIONAL DIAGRAM PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS APPLICATIONS INFORMATION TYPICAL APPLICATION PACKAGE OUTLINE DRAWING EXAMPLE OF ORDERING INFORMATION ORDERING PART NUMBER REVISION HISTORY
The CAT102 adjustable shunt regulator features The current limit can be adjusted by using a resistor R3 isolated supply inputs and outputs, ideal for isolated connected between the IN and OUT pins. For example, power-supply applications using an optocoupler in a 3.3 V supply VIN is associated with R3 = 135 Ω, and a the feedback path. The CAT102 sinks 20 mA with 10 V supply works best with R3 = 470 Ω. The CAT102 VOUT at 0.3 V. The wide input supply range allows shunt regulator is limited to low-current applications with the device to operate from 2.2 V to 18 V. The the OUT pin capable of sinking up to 20 mA max. CAT102 compares the FB input to a precision 600mV reference. If the FB input is low, the OUT pin sinks no current. If FB rises above 600 mV, the OUT pin sinks up to 20 mA. Figure 1 shows the CAT102 configured as a shunt regulator. To generate an output voltage of 0.6 V, the FB pin has to be directly connected to the OUT pin. A 1.0 µF capacitor from OUT to GND is recommended when the output voltage is 0.6 V. A resistor-divider connected from OUT to GND is used to produce a higher output voltage as set by the following equation: VOUT = (1 + R1/R2) x 0.6 V
onsemi
TION
Figure 1. Application circuits for 0.6 V output and 1.2 V output voltages
YOUR V R IN 3 VOUT R INFORMA 3.3V 0.6V/20mA ACT 5 3 RECOMMENDED FOR NEW DESIGN IN OUT C1 C2 CONT
CAT102
0.1µF 1µF 2 1 ATIVE FO GND FB
DISCONTINUED
PLEASE V R IN 3 VOUT = (1 + R1/R2) x 0.6V THIS DEVICE IS NOT REPRESENT 3.3V 1.2V/20mA 5 3 IN OUT C1 C R 2 1
CAT102
0.1µF 10kΩ 1µF 2 1 GND FB R2 10kΩ Doc. No. MD-4007 Rev. 17 4 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice Document Outline CAT102 Precision, Adjustable Shunt Regulator (600 mV Reference) FEATURES APPLICATION DESCRIPTION FUNCTIONAL DIAGRAM PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS APPLICATIONS INFORMATION TYPICAL APPLICATION PACKAGE OUTLINE DRAWING EXAMPLE OF ORDERING INFORMATION ORDERING PART NUMBER REVISION HISTORY
