Datasheet LT8603 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 42V, Low IQ, Quad Output Triple Monolithic Buck Converter and Boost Controller |
| Pages / Page | 38 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| File Format / Size | PDF / 1.9 Mb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
Text Version of Document
LT8603
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, EN/UVLO = 3V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Bias and Internal Regulators
Minimum Operating VIN for Channels 1, 2 and 3 l 2.7 3.0 V Minimum VIN to Start for Channels 1, 2 and 3 l 3.1 3.3 V Minimum Operating VIN for Channel 4 l 3.0 3.2 V Minimum VIN to Start for Channel 4 l 4.0 4.15 V VIN Quiescent Current, Shutdown VBIAS = 0V, EN/UVLO = 0.4V 0.1 1 μA Total Operating Current VBATT VBATT = 12V, Channels 1 and 2 Active, No-Load (Note 4) 28 μA VBATT = 12V, All Channels Active, No-Load (Note 4) 50 μA EN/UVLO Threshold EN/UVLO Rising l 1.15 1.2 1.25 V EN/UVLO Falling l 1.1 1.15 1.2 V EN/UVLO Input Current EN/UVLO = 1.2V –50 50 nA INTVCC4 Regulated Voltage VBIAS = 0V l 4.4 4.6 4.8 V VBIAS = 6V l 4.7 5 5.2 V INTVCC4 Regulator Load Regulation INTVCC4 at 1mA – INTVCC4 at 40mA 70 mV
Oscillator
Switching Frequency RT = 28.7kΩ l 1.8 2 2.2 MHz RT = 243kΩ l 0.224 0.25 0.284 MHz SYNC Input Frequency Range l 0.25 2.2 MHz SYNC Input Voltage Low l 0.3 V SYNC Input Voltage High l 1.2 V SYNC Input Current –100 100 nA FSEL4A, FSEL4B Input Voltage Low l 0.4 V FSEL4A, FSEL4B Input Voltage High l 2 V FSEL4A, FSEL4B Input Current l –100 100 nA
Channel 1
Feedback Voltage FB1 l 0.985 1 1.015 V Input Current FB1 l –100 100 nA FB1 Line Regulation VIN = 3V to 42V 0.002 0.01 %/V SW1 Peak Current Limit (Note 3) 2.0 2.7 3.7 A SW1 Leakage Current 0.1 1 μA SW1 Top On-Resistance ISW1 = 1A 240 mΩ SW1 Bottom On-Resistance ISW1 = 1A 170 mΩ Lower FB1 Power Good Threshold Percentage of VFB1, VFB1 Falling l 89 92 95 % Upper FB1 Power Good Threshold Percentage of VFB1, VFB1 Rising l 104 107 110 % Power Good Threshold Hysteresis 0.8 % PG1 Output Voltage Low IPG1 = 350μA l 0.13 0.3 V PG1 Leakage Current PG1 = 5V, FB1 = 1V l 6 μA TRKSS1 Pull-Up Current TRKSS1 = 0.2V 1.5 2.4 3.1 μA 8603f For more information www.linear.com/LT8603 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information System Architecture Boost Controller Buck Regulators General Functions PCB Layout Thermal Considerations Typical Applications Package Description Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, EN/UVLO = 3V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Bias and Internal Regulators
Minimum Operating VIN for Channels 1, 2 and 3 l 2.7 3.0 V Minimum VIN to Start for Channels 1, 2 and 3 l 3.1 3.3 V Minimum Operating VIN for Channel 4 l 3.0 3.2 V Minimum VIN to Start for Channel 4 l 4.0 4.15 V VIN Quiescent Current, Shutdown VBIAS = 0V, EN/UVLO = 0.4V 0.1 1 μA Total Operating Current VBATT VBATT = 12V, Channels 1 and 2 Active, No-Load (Note 4) 28 μA VBATT = 12V, All Channels Active, No-Load (Note 4) 50 μA EN/UVLO Threshold EN/UVLO Rising l 1.15 1.2 1.25 V EN/UVLO Falling l 1.1 1.15 1.2 V EN/UVLO Input Current EN/UVLO = 1.2V –50 50 nA INTVCC4 Regulated Voltage VBIAS = 0V l 4.4 4.6 4.8 V VBIAS = 6V l 4.7 5 5.2 V INTVCC4 Regulator Load Regulation INTVCC4 at 1mA – INTVCC4 at 40mA 70 mV
Oscillator
Switching Frequency RT = 28.7kΩ l 1.8 2 2.2 MHz RT = 243kΩ l 0.224 0.25 0.284 MHz SYNC Input Frequency Range l 0.25 2.2 MHz SYNC Input Voltage Low l 0.3 V SYNC Input Voltage High l 1.2 V SYNC Input Current –100 100 nA FSEL4A, FSEL4B Input Voltage Low l 0.4 V FSEL4A, FSEL4B Input Voltage High l 2 V FSEL4A, FSEL4B Input Current l –100 100 nA
Channel 1
Feedback Voltage FB1 l 0.985 1 1.015 V Input Current FB1 l –100 100 nA FB1 Line Regulation VIN = 3V to 42V 0.002 0.01 %/V SW1 Peak Current Limit (Note 3) 2.0 2.7 3.7 A SW1 Leakage Current 0.1 1 μA SW1 Top On-Resistance ISW1 = 1A 240 mΩ SW1 Bottom On-Resistance ISW1 = 1A 170 mΩ Lower FB1 Power Good Threshold Percentage of VFB1, VFB1 Falling l 89 92 95 % Upper FB1 Power Good Threshold Percentage of VFB1, VFB1 Rising l 104 107 110 % Power Good Threshold Hysteresis 0.8 % PG1 Output Voltage Low IPG1 = 350μA l 0.13 0.3 V PG1 Leakage Current PG1 = 5V, FB1 = 1V l 6 μA TRKSS1 Pull-Up Current TRKSS1 = 0.2V 1.5 2.4 3.1 μA 8603f For more information www.linear.com/LT8603 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information System Architecture Boost Controller Buck Regulators General Functions PCB Layout Thermal Considerations Typical Applications Package Description Typical Application Related Parts
