Datasheet LT3988 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Dual 60V Monolithic 1A Step-Down Switching Regulator |
| Pages / Page | 24 / 5 — Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. … |
| File Format / Size | PDF / 287 Kb |
| Document Language | English |
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. No-Load Supply Current vs
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LT3988
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. No-Load Supply Current vs Switch Voltage Drop vs Load Input Voltage Current Boost Current vs Load Current
3.5 1.0 20 3.4 3.3 0.8 15 3.2 3.1 0.6 (mA) 3.0 10 I Q 2.9 TAGE DROP (V) 0.4 2.8 VOL BOOST CURRENT (mA) 5 2.7 0.2 2.6 2.5 0 0 0 5 10 15 20 25 30 35 40 45 50 55 60 0 0.2 0.4 0.6 0.8 1.0 0 0.2 0.4 0.6 0.8 1.0 VIN (V) LOAD CURRENT (A) LOAD CURRENT (A) 3988 G10 3988 G11 3988 G12
Boost Diode Voltage vs Boost Maximum VIN for Full Frequency Minimum Switch On-Time vs Diode Current vs Load Current Temperature
1.00 40 250 200 0.75 30 150 0.50 (V) 20 V IN 100 MINIMUM ON-TIME (ns) BOOST DIODE VOLTAGE (V) 0.25 10 50 f = 1MHz 0 0 0 0 20 40 60 80 100 0 0.2 0.4 0.6 0.8 1.0 –50 –25 0 25 50 75 100 125 150 BOOST DIODE CURRENT (mA) LOAD CURRENT (A) TEMPERATURE (°C) 3988 G13 3988 G14 3988 G15
Minimum Switch Off-Time vs Undervoltage Lockout Temperature vs Temperature
350 VIN1 RISING 300 4 V 250 IN1 FALLING 3 V 200 IN2 RISING 150 UVLO (V) 2 VIN2 FALLING V IN 100 MINIMUM OFF-TIME (ns) 1 50 0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) 3988 G16 3988 G17 3988f 5 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 Typical Application Related Parts
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. No-Load Supply Current vs Switch Voltage Drop vs Load Input Voltage Current Boost Current vs Load Current
3.5 1.0 20 3.4 3.3 0.8 15 3.2 3.1 0.6 (mA) 3.0 10 I Q 2.9 TAGE DROP (V) 0.4 2.8 VOL BOOST CURRENT (mA) 5 2.7 0.2 2.6 2.5 0 0 0 5 10 15 20 25 30 35 40 45 50 55 60 0 0.2 0.4 0.6 0.8 1.0 0 0.2 0.4 0.6 0.8 1.0 VIN (V) LOAD CURRENT (A) LOAD CURRENT (A) 3988 G10 3988 G11 3988 G12
Boost Diode Voltage vs Boost Maximum VIN for Full Frequency Minimum Switch On-Time vs Diode Current vs Load Current Temperature
1.00 40 250 200 0.75 30 150 0.50 (V) 20 V IN 100 MINIMUM ON-TIME (ns) BOOST DIODE VOLTAGE (V) 0.25 10 50 f = 1MHz 0 0 0 0 20 40 60 80 100 0 0.2 0.4 0.6 0.8 1.0 –50 –25 0 25 50 75 100 125 150 BOOST DIODE CURRENT (mA) LOAD CURRENT (A) TEMPERATURE (°C) 3988 G13 3988 G14 3988 G15
Minimum Switch Off-Time vs Undervoltage Lockout Temperature vs Temperature
350 VIN1 RISING 300 4 V 250 IN1 FALLING 3 V 200 IN2 RISING 150 UVLO (V) 2 VIN2 FALLING V IN 100 MINIMUM OFF-TIME (ns) 1 50 0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) 3988 G16 3988 G17 3988f 5 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 Typical Application Related Parts
