Datasheet LT3973, LT3973-3.3, LT3973-5 (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | 42V, 750mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes |
| Seiten / Seite | 24 / 4 — ELECTRICAL. CHARACTERISTICS The. denotes the specifications which apply … |
| Dateiformat / Größe | PDF / 479 Kb |
| Dokumentensprache | Englisch |
ELECTRICAL. CHARACTERISTICS The. denotes the specifications which apply over the full operating
Modelllinie für dieses Datenblatt
- LT3973EDD#PBF LT3973EDD#TRPBF LT3973EDD-3.3#PBF LT3973EDD-3.3#TRPBF LT3973EDD-5#PBF LT3973EDD-5#TRPBF LT3973EMSE#PBF LT3973EMSE#TRPBF LT3973EMSE-3.3#PBF LT3973EMSE-3.3#TRPBF LT3973EMSE-5#PBF LT3973EMSE-5#TRPBF LT3973HDD#PBF LT3973HDD#TRPBF LT3973HDD-3.3#PBF LT3973HDD-3.3#TRPBF LT3973HDD-5#PBF LT3973HDD-5#TRPBF LT3973HMSE#PBF LT3973HMSE#TRPBF LT3973HMSE-3.3#PBF LT3973HMSE-3.3#TRPBF LT3973HMSE-5#PBF LT3973HMSE-5#TRPBF LT3973IDD#PBF LT3973IDD#TRPBF LT3973IDD-3.3#PBF LT3973IDD-3.3#TRPBF LT3973IDD-5#PBF LT3973IDD-5#TRPBF LT3973IMSE#PBF LT3973IMSE#TRPBF LT3973IMSE-3.3#PBF LT3973IMSE-3.3#TRPBF LT3973IMSE-5#PBF LT3973IMSE-5#TRPBF
Textversion des Dokuments
LT3973/LT3973-3.3/LT3973-5
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VBD = 3.3V unless otherwise noted. (Note 2)
EN/UVLO Pin Current VEN/UVLO = 12V 1 30 nA EN/UVLO Voltage Threshold EN/UVLO Falling, VIN ≥ 4.2V l 1.09 1.16 1.23 V EN/UVLO Voltage Threshold EN/UVLO Rising, VIN ≥ 4.2V l 1.12 1.19 1.28 V EN/UVLO Voltage Hysteresis 30 45 mV PG Threshold Offset from Feedback Voltage VFB Rising 6.5 10 13.5 % PG Hysteresis as % of Output Voltage 0.8 % PG Leakage VPG = 3V 0.01 1 µA PG Sink Current VPG = 0.4V l 220 350 µA Minimum Switch On-Time 70 ns Minimum Switch Off-Time (Note 5) VIN = 10V 130 180 ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
This is the minimum input voltage for operation with accurate FB may cause permanent damage to the device. Exposure to any Absolute reference voltage. Maximum Rating condition for extended periods may affect device
Note 4:
This is the minimum voltage across the boost capacitor needed to reliability and lifetime. guarantee full saturation of the switch.
Note 2:
The LT3973E is guaranteed to meet performance specifications
Note 5:
The LT3973 contains circuitry that extends the maximum duty from 0°C to 125°C junction temperature. Specifications over the –40°C cycle if there is sufficient voltage across the boost capacitor. See the to 125°C operating junction temperature range are assured by design, Application Information section for more details. characterization, and correlation with statistical process controls. The
Note 6:
This IC includes overtemperature protection that is intended LT3973I is guaranteed over the full –40°C to 125°C operating junction to protect the device during momentary overload conditions. Junction temperature range. The LT3973H is guaranteed over the full –40°C to temperature will exceed the maximum operating junction temperature 150°C operating junction temperature range. High junction temperatures when overtemperature protection is active. Continuous operation above degrade operating lifetimes. Operating lifetime is derated at junction the specified maximum operating junction temperature may impair device temperatures greater than 125°C. The junction temperature (TJ, in °C) is reliability or permanently damage the device. calculated from the ambient temperature (TA in °C) and power dissipation (PD, in Watts) according to the formula: TJ = TA + (PD • θJA) where θJA (in °C/W) is the package thermal impedance. 3973fb 4 For more information www.linear.com/LT3973 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 The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VBD = 3.3V unless otherwise noted. (Note 2)
EN/UVLO Pin Current VEN/UVLO = 12V 1 30 nA EN/UVLO Voltage Threshold EN/UVLO Falling, VIN ≥ 4.2V l 1.09 1.16 1.23 V EN/UVLO Voltage Threshold EN/UVLO Rising, VIN ≥ 4.2V l 1.12 1.19 1.28 V EN/UVLO Voltage Hysteresis 30 45 mV PG Threshold Offset from Feedback Voltage VFB Rising 6.5 10 13.5 % PG Hysteresis as % of Output Voltage 0.8 % PG Leakage VPG = 3V 0.01 1 µA PG Sink Current VPG = 0.4V l 220 350 µA Minimum Switch On-Time 70 ns Minimum Switch Off-Time (Note 5) VIN = 10V 130 180 ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
This is the minimum input voltage for operation with accurate FB may cause permanent damage to the device. Exposure to any Absolute reference voltage. Maximum Rating condition for extended periods may affect device
Note 4:
This is the minimum voltage across the boost capacitor needed to reliability and lifetime. guarantee full saturation of the switch.
Note 2:
The LT3973E is guaranteed to meet performance specifications
Note 5:
The LT3973 contains circuitry that extends the maximum duty from 0°C to 125°C junction temperature. Specifications over the –40°C cycle if there is sufficient voltage across the boost capacitor. See the to 125°C operating junction temperature range are assured by design, Application Information section for more details. characterization, and correlation with statistical process controls. The
Note 6:
This IC includes overtemperature protection that is intended LT3973I is guaranteed over the full –40°C to 125°C operating junction to protect the device during momentary overload conditions. Junction temperature range. The LT3973H is guaranteed over the full –40°C to temperature will exceed the maximum operating junction temperature 150°C operating junction temperature range. High junction temperatures when overtemperature protection is active. Continuous operation above degrade operating lifetimes. Operating lifetime is derated at junction the specified maximum operating junction temperature may impair device temperatures greater than 125°C. The junction temperature (TJ, in °C) is reliability or permanently damage the device. calculated from the ambient temperature (TA in °C) and power dissipation (PD, in Watts) according to the formula: TJ = TA + (PD • θJA) where θJA (in °C/W) is the package thermal impedance. 3973fb 4 For more information www.linear.com/LT3973 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