Datasheet LTC3630A (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | High Efficiency, 76V 500mA Synchronous Step-Down Converter |
| Pages / Page | 26 / 4 — elecTrical characTerisTics. Note 5:. Note 6:. Note 4:. Note 7:. Typical … |
| File Format / Size | PDF / 347 Kb |
| Document Language | English |
elecTrical characTerisTics. Note 5:. Note 6:. Note 4:. Note 7:. Typical perForMance characTerisTics. Soft-Start Waveform
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LTC3630A
elecTrical characTerisTics
Note that the maximum ambient temperature consistent with these
Note 5:
Dynamic supply current is higher due to the gate charge being specifications is determined by specific operating conditions in delivered at the switching frequency. See Applications Information. conjunction with board layout, the rated package thermal impedance and
Note 6:
For application concerned with pin creepage and clearance other environmental factors. distances at high voltages, the MSOP package should be used. See
Note 4:
This IC includes over temperature protection that is intended to Applications Information. protect the device during momentary overload conditions. The maximum
Note 7:
At very high input voltages, the minimum output voltage that can rated junction temperature will be exceeded when this protection is active. be maintained is limited to VIN – 65V if the load current is less than 5mA. Continuous operation above the specified absolute maximum operating Refer to the High Input Voltage Considerations in the Operation section. junction temperature may impair device reliability or permanently damage the device. The overtemperature protection level is not production tested.
Typical perForMance characTerisTics Soft-Start Waveform Load Step Transient Response Short-Circuit Response
OUTPUT VOLTAGE OUTPUT OUTPUT 2V/DIV VOLTAGE VOLTAGE 50mV/DIV 2V/DIV INDUCTOR LOAD INDUCTOR CURRENT CURRENT CURRENT 500mA/DIV 200mA/DIV 500mA/DIV C 3630a G01 3630a G02 3630a G03 OUT = 100µF 1ms/DIV VIN = 12V 500µs/DIV VIN = 12V 200µs/DIV FIGURE 13 CIRCUIT VOUT = 5V VOUT = 5V FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT
Efficiency and Power Loss Efficiency and Power Loss Efficiency and Power Loss vs Load Current, VOUT = 5V vs Load Current, VOUT = 3.3V vs Load Current, VOUT = 1.8V
100 100 100 VOUT = 1.8V 90 90 90 FIGURE 13 CIRCUIT EFFICIENCY 80 1000 80 EFFICIENCY 1000 80 EFFICIENCY 1000 POWER LOSS (mW) 70 70 POWER LOSS (mW) 70 POWER LOSS (mW) 60 100 60 100 60 100 50 50 50 40 POWER LOSS 10 40 10 POWER LOSS 40 10 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) POWER LOSS 30 30 30 V V 20 OUT = 5V 1 OUT = 3.3V FIGURE 13 CIRCUIT 20 FIGURE 13 CIRCUIT 1 20 1 10 VIN = 12V 10 VIN = 12V 10 VIN = 12V V V V 0 IN = 70V 0.1 0 IN = 68V 0.1 0 IN = 67V 0.1 0.1 1 10 100 1000 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3630a G04 3630a G05 3630a G06 3630afc 4 For more information www.linear.com/LTC3630A Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
elecTrical characTerisTics
Note that the maximum ambient temperature consistent with these
Note 5:
Dynamic supply current is higher due to the gate charge being specifications is determined by specific operating conditions in delivered at the switching frequency. See Applications Information. conjunction with board layout, the rated package thermal impedance and
Note 6:
For application concerned with pin creepage and clearance other environmental factors. distances at high voltages, the MSOP package should be used. See
Note 4:
This IC includes over temperature protection that is intended to Applications Information. protect the device during momentary overload conditions. The maximum
Note 7:
At very high input voltages, the minimum output voltage that can rated junction temperature will be exceeded when this protection is active. be maintained is limited to VIN – 65V if the load current is less than 5mA. Continuous operation above the specified absolute maximum operating Refer to the High Input Voltage Considerations in the Operation section. junction temperature may impair device reliability or permanently damage the device. The overtemperature protection level is not production tested.
Typical perForMance characTerisTics Soft-Start Waveform Load Step Transient Response Short-Circuit Response
OUTPUT VOLTAGE OUTPUT OUTPUT 2V/DIV VOLTAGE VOLTAGE 50mV/DIV 2V/DIV INDUCTOR LOAD INDUCTOR CURRENT CURRENT CURRENT 500mA/DIV 200mA/DIV 500mA/DIV C 3630a G01 3630a G02 3630a G03 OUT = 100µF 1ms/DIV VIN = 12V 500µs/DIV VIN = 12V 200µs/DIV FIGURE 13 CIRCUIT VOUT = 5V VOUT = 5V FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT
Efficiency and Power Loss Efficiency and Power Loss Efficiency and Power Loss vs Load Current, VOUT = 5V vs Load Current, VOUT = 3.3V vs Load Current, VOUT = 1.8V
100 100 100 VOUT = 1.8V 90 90 90 FIGURE 13 CIRCUIT EFFICIENCY 80 1000 80 EFFICIENCY 1000 80 EFFICIENCY 1000 POWER LOSS (mW) 70 70 POWER LOSS (mW) 70 POWER LOSS (mW) 60 100 60 100 60 100 50 50 50 40 POWER LOSS 10 40 10 POWER LOSS 40 10 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) POWER LOSS 30 30 30 V V 20 OUT = 5V 1 OUT = 3.3V FIGURE 13 CIRCUIT 20 FIGURE 13 CIRCUIT 1 20 1 10 VIN = 12V 10 VIN = 12V 10 VIN = 12V V V V 0 IN = 70V 0.1 0 IN = 68V 0.1 0 IN = 67V 0.1 0.1 1 10 100 1000 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3630a G04 3630a G05 3630a G06 3630afc 4 For more information www.linear.com/LTC3630A Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
