Datasheet LTC3604 (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | 2.5A, 15V Monolithic Synchronous Step-Down Regulator |
| Seiten / Seite | 26 / 4 — ELECTRICAL CHARACTERISTICS Note 3:. Note 5:. Note 4:. TYPICAL PERFORMANCE … |
| Dateiformat / Größe | PDF / 394 Kb |
| Dokumentensprache | Englisch |
ELECTRICAL CHARACTERISTICS Note 3:. Note 5:. Note 4:. TYPICAL PERFORMANCE CHARACTERISTICS
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Textversion des Dokuments
LTC3604
ELECTRICAL CHARACTERISTICS Note 3:
TJ is calculated from the ambient temperature, TA, and power
Note 5:
This IC includes overtemperature protection that is intended dissipation, PD, according to the following formula: to protect the device during momentary overload conditions. Junction T temperature will exceed 125°C when overtemperature protection is active. J = TA + (PD • θJA) where θ Continuous operation above the specified maximum operating junction JA = 45°C/W for the QFN package and θJA = 38°C/W for the MSOP package. temperature may impair device reliability.
Note 4:
Maximum allowed current draw when used as a regulated output is 5mA. This supply is only intended to provide additional DC load current as needed and not intended to regulate large transient or AC behavior as these waveforms may impact LTC3604 operation.
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 12V, fO = 1MHz, L = 1.5µH unless otherwise noted. Efficiency vs Load Current Efficiency vs Load Current Burst Mode Operation Forced Continuous Mode Efficiency vs Load Current
100 100 100 VOUT = 1.8V VOUT = 1.8V 90 90 90 BURST 80 80 80 70 70 70 60 60 60 FORCED CONTINUOUS 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 30 20 V 20 20 IN = 4V VIN = 4V 10 VIN = 8V 10 VIN = 8V 10 VOUT = 3.3V VIN = 12V VIN = 12V V 0 0 0 OUT = 5V 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 3604 G01 3604 G02 3604 G03
Efficiency vs Input Voltage Efficiency vs Frequency Reference Voltage vs Burst Mode Operation Forced Continuous Mode Temperature
100 94 0.605 VOUT = 1.8V 95 ILOAD = 800mA 92 0.603 90 90 85 L = 1.5µH 0.601 (V) 80 88 V REF 0.599 EFFICIENCY (%) 75 EFFICIENCY (%) 86 L = 0.68µH 70 ILOAD = 500mA I 0.597 LOAD = 100mA 84 65 ILOAD = 10mA ILOAD = 2.5A 60 82 0.595 4 6 8 10 12 14 16 0.5 1 1.5 2 2.5 3 –50 –25 0 25 50 75 100 125 INPUT VOLTAGE (V) FREQUENCY (MHz) TEMPERATURE (°C) 3604 G04 3604 G05 3604 G06 3604fa 4 For more information www.linear.com/LTC3604 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Revision History Related Parts
ELECTRICAL CHARACTERISTICS Note 3:
TJ is calculated from the ambient temperature, TA, and power
Note 5:
This IC includes overtemperature protection that is intended dissipation, PD, according to the following formula: to protect the device during momentary overload conditions. Junction T temperature will exceed 125°C when overtemperature protection is active. J = TA + (PD • θJA) where θ Continuous operation above the specified maximum operating junction JA = 45°C/W for the QFN package and θJA = 38°C/W for the MSOP package. temperature may impair device reliability.
Note 4:
Maximum allowed current draw when used as a regulated output is 5mA. This supply is only intended to provide additional DC load current as needed and not intended to regulate large transient or AC behavior as these waveforms may impact LTC3604 operation.
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 12V, fO = 1MHz, L = 1.5µH unless otherwise noted. Efficiency vs Load Current Efficiency vs Load Current Burst Mode Operation Forced Continuous Mode Efficiency vs Load Current
100 100 100 VOUT = 1.8V VOUT = 1.8V 90 90 90 BURST 80 80 80 70 70 70 60 60 60 FORCED CONTINUOUS 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 30 20 V 20 20 IN = 4V VIN = 4V 10 VIN = 8V 10 VIN = 8V 10 VOUT = 3.3V VIN = 12V VIN = 12V V 0 0 0 OUT = 5V 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 3604 G01 3604 G02 3604 G03
Efficiency vs Input Voltage Efficiency vs Frequency Reference Voltage vs Burst Mode Operation Forced Continuous Mode Temperature
100 94 0.605 VOUT = 1.8V 95 ILOAD = 800mA 92 0.603 90 90 85 L = 1.5µH 0.601 (V) 80 88 V REF 0.599 EFFICIENCY (%) 75 EFFICIENCY (%) 86 L = 0.68µH 70 ILOAD = 500mA I 0.597 LOAD = 100mA 84 65 ILOAD = 10mA ILOAD = 2.5A 60 82 0.595 4 6 8 10 12 14 16 0.5 1 1.5 2 2.5 3 –50 –25 0 25 50 75 100 125 INPUT VOLTAGE (V) FREQUENCY (MHz) TEMPERATURE (°C) 3604 G04 3604 G05 3604 G06 3604fa 4 For more information www.linear.com/LTC3604 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Revision History Related Parts