Datasheet LT3990, LT3990-3.3, LT3990-5 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 62V, 350mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes |
| Pages / Page | 22 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| File Format / Size | PDF / 307 Kb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
Model Line for this Datasheet
- LT3990EDD#PBF LT3990EDD#TRPBF LT3990EMSE#PBF LT3990EMSE#TRPBF LT3990EMSE-3.3#PBF LT3990EMSE-3.3#TRPBF LT3990EMSE-5#PBF LT3990EMSE-5#TRPBF LT3990EMSE-5#WTRPBF LT3990HMSE#PBF LT3990HMSE#TRPBF LT3990HMSE-3.3#PBF LT3990HMSE-3.3#TRPBF LT3990HMSE-5#PBF LT3990HMSE-5#TRPBF LT3990IDD#PBF LT3990IDD#TRPBF LT3990IMSE#PBF LT3990IMSE#TRPBF LT3990IMSE-3.3#PBF LT3990IMSE-3.3#TRPBF LT3990IMSE-5#PBF LT3990IMSE-5#TRPBF
Text Version of Document
LT3990/LT3990-3.3/LT3990-5
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) PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage l 4 4.2 V Quiescent Current from VIN VEN/UVLO Low 0.7 1.2 µA VEN/UVLO High 1.9 2.8 µA VEN/UVLO High l 4 µA LT3990 Feedback Voltage 1.195 1.21 1.225 V l 1.185 1.21 1.235 V LT3990-3.3 Output Voltage 3.26 3.3 3.34 V l 3.234 3.3 3.366 V LT3990-5 Output Voltage 4.94 5 5.06 V l 4.9 5 5.1 V LT3990 FB Pin Bias Current (Note 3) l 0.1 20 nA FB/Output Voltage Line Regulation 4.2V < VIN < 40V 0.0002 0.01 %/V Switching Frequency RT = 41.2k, VIN = 6V 1.84 2.3 2.76 MHz RT = 158k, VIN = 6V 672 840 1008 kHz RT = 768k, VIN = 6V 168 210 252 kHz Switch Current Limit VIN = 5V, VFB = 0V 535 700 865 mA Catch Schottky Current Limit VIN = 5V 360 450 540 mA Switch VCESAT ISW = 200mA 210 mV Switch Leakage Current 0.05 2 µA Catch Schottky Forward Voltage ISCH = 100mA, VIN = VBD = NC 725 mV Catch Schottky Reverse Leakage VSW = 12V 0.05 2 µA Boost Schottky Forward Voltage ISCH = 50mA, VIN = NC, VBOOST = 0V 900 mV Boost Schottky Reverse Leakage VREVERSE = 12V 0.02 2 µA Minimum Boost Voltage (Note 4) VIN = 5V l 1.4 1.8 V BOOST Pin Current ISW = 200mA, VBOOST = 15V 8.5 12 mA EN/UVLO Pin Current VEN/UVLO = 12V 1 30 nA EN/UVLO Voltage Threshold EN/UVLO Rising, VIN ≥ 4.2V l 1.14 1.19 1.28 V EN/UVLO Voltage Hysteresis 35 mV PG Threshold Offset from Feedback Voltage VFB Rising 6.5 10 13.5 % PG Hysteresis as % of Output Voltage 1.0 % PG Leakage VPG = 3V 0.01 1 µA PG Sink Current VPG = 0.4V l 30 80 µA Minimum Switch On-Time 115 ns Minimum Switch Off-Time VIN = 10V l 100 160 ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
Bias current flows into the FB pin. may cause permanent damage to the device. Exposure to any Absolute
Note 4:
This is the minimum voltage across the boost capacitor needed to Maximum Rating condition for extended periods may affect device guarantee full saturation of the switch. reliability and lifetime.
Note 2:
The LT3990E is guaranteed to meet performance specifications from 0°C to 125°C junction temperature. Specifications over the –40°C to 125°C operating junction temperature range are assured by design, characterization, and correlation with statistical process controls. The LT3990I is guaranteed over the full –40°C to 125°C operating junction temperature range. The LT3990H is guaranteed over the full –40°C to 150°C operating junction temperature range. High junction temperatures degrade operating lifetimes. Operating lifetime is derated at junction temperatures greater than 125°C. 3990fa 3 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) PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage l 4 4.2 V Quiescent Current from VIN VEN/UVLO Low 0.7 1.2 µA VEN/UVLO High 1.9 2.8 µA VEN/UVLO High l 4 µA LT3990 Feedback Voltage 1.195 1.21 1.225 V l 1.185 1.21 1.235 V LT3990-3.3 Output Voltage 3.26 3.3 3.34 V l 3.234 3.3 3.366 V LT3990-5 Output Voltage 4.94 5 5.06 V l 4.9 5 5.1 V LT3990 FB Pin Bias Current (Note 3) l 0.1 20 nA FB/Output Voltage Line Regulation 4.2V < VIN < 40V 0.0002 0.01 %/V Switching Frequency RT = 41.2k, VIN = 6V 1.84 2.3 2.76 MHz RT = 158k, VIN = 6V 672 840 1008 kHz RT = 768k, VIN = 6V 168 210 252 kHz Switch Current Limit VIN = 5V, VFB = 0V 535 700 865 mA Catch Schottky Current Limit VIN = 5V 360 450 540 mA Switch VCESAT ISW = 200mA 210 mV Switch Leakage Current 0.05 2 µA Catch Schottky Forward Voltage ISCH = 100mA, VIN = VBD = NC 725 mV Catch Schottky Reverse Leakage VSW = 12V 0.05 2 µA Boost Schottky Forward Voltage ISCH = 50mA, VIN = NC, VBOOST = 0V 900 mV Boost Schottky Reverse Leakage VREVERSE = 12V 0.02 2 µA Minimum Boost Voltage (Note 4) VIN = 5V l 1.4 1.8 V BOOST Pin Current ISW = 200mA, VBOOST = 15V 8.5 12 mA EN/UVLO Pin Current VEN/UVLO = 12V 1 30 nA EN/UVLO Voltage Threshold EN/UVLO Rising, VIN ≥ 4.2V l 1.14 1.19 1.28 V EN/UVLO Voltage Hysteresis 35 mV PG Threshold Offset from Feedback Voltage VFB Rising 6.5 10 13.5 % PG Hysteresis as % of Output Voltage 1.0 % PG Leakage VPG = 3V 0.01 1 µA PG Sink Current VPG = 0.4V l 30 80 µA Minimum Switch On-Time 115 ns Minimum Switch Off-Time VIN = 10V l 100 160 ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
Bias current flows into the FB pin. may cause permanent damage to the device. Exposure to any Absolute
Note 4:
This is the minimum voltage across the boost capacitor needed to Maximum Rating condition for extended periods may affect device guarantee full saturation of the switch. reliability and lifetime.
Note 2:
The LT3990E is guaranteed to meet performance specifications from 0°C to 125°C junction temperature. Specifications over the –40°C to 125°C operating junction temperature range are assured by design, characterization, and correlation with statistical process controls. The LT3990I is guaranteed over the full –40°C to 125°C operating junction temperature range. The LT3990H is guaranteed over the full –40°C to 150°C operating junction temperature range. High junction temperatures degrade operating lifetimes. Operating lifetime is derated at junction temperatures greater than 125°C. 3990fa 3 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
