Datasheet LT3509 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Dual 36V, 700mA Step-Down Regulator |
| Pages / Page | 24 / 5 — Typical perForMance characTerisTics. fSW vs Temperature. Max VIN for … |
| File Format / Size | PDF / 328 Kb |
| Document Language | English |
Typical perForMance characTerisTics. fSW vs Temperature. Max VIN for Constant Frequency. FB Pin Voltage vs Temperature
Model Line for this Datasheet
Text Version of Document
LT3509
Typical perForMance characTerisTics fSW vs Temperature Max VIN for Constant Frequency FB Pin Voltage vs Temperature (Measured at 1MHz) VOUT = 3.3V, fSW = 2MHz
0.810 1.04 30 TA = 25ºC 1.03 25 TA = 85ºC 0.805 ) 1.02 SW (V) 20 IN 1.01 0.800 15 1.00 NORMALIZED (f MAXIMUM V 10 0.795 0.99 FEEDBACK PIN VOLTAGE (V) 5 0.98 0.790 0.97 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 0.2 0.4 0.6 0.8 TEMPERATURE (°C) TEMPERATURE (˚C) ILOAD (A) 3509 G08 3509 G09 3509 G10
Max VIN for Constant Frequency Minimum On-Time vs VOUT = 5V, fSW = 2MHz Temperature, ILOAD = 0.3A
45 160 40 T 140 A = 25ºC 35 T 120 A = 85ºC (V) 30 IN 100 25 80 20 60 MAXIMUM V 15 MINIMUM ON-TIME (ns) 10 40 5 20 0 0 0 0.2 0.4 0.6 0.8 –50 –25 0 25 50 75 100 125 150 ILOAD (A) TEMPERATURE (°C) 3509 G11 3509 G12
ILIM vs Temperature ILIM vs Duty Cycle
1.5 1.8 TA = 25ºC 1.6 1.3 SWITCH 1.4 1.2 1.0 DA (A) (A) 1 I LIM I LIM 0.8 0.9 0.6 0.4 0.7 0.2 0.5 0 –50 –25 0 25 50 75 100 125 150 0 10 20 30 40 50 60 70 80 90 100 TEMPERATURE (°C) DUTY CYCLE (%) 3509 G13 3509 G14 3509fd For more information www.linear.com/LT3509 5 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Related Parts
Typical perForMance characTerisTics fSW vs Temperature Max VIN for Constant Frequency FB Pin Voltage vs Temperature (Measured at 1MHz) VOUT = 3.3V, fSW = 2MHz
0.810 1.04 30 TA = 25ºC 1.03 25 TA = 85ºC 0.805 ) 1.02 SW (V) 20 IN 1.01 0.800 15 1.00 NORMALIZED (f MAXIMUM V 10 0.795 0.99 FEEDBACK PIN VOLTAGE (V) 5 0.98 0.790 0.97 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 0.2 0.4 0.6 0.8 TEMPERATURE (°C) TEMPERATURE (˚C) ILOAD (A) 3509 G08 3509 G09 3509 G10
Max VIN for Constant Frequency Minimum On-Time vs VOUT = 5V, fSW = 2MHz Temperature, ILOAD = 0.3A
45 160 40 T 140 A = 25ºC 35 T 120 A = 85ºC (V) 30 IN 100 25 80 20 60 MAXIMUM V 15 MINIMUM ON-TIME (ns) 10 40 5 20 0 0 0 0.2 0.4 0.6 0.8 –50 –25 0 25 50 75 100 125 150 ILOAD (A) TEMPERATURE (°C) 3509 G11 3509 G12
ILIM vs Temperature ILIM vs Duty Cycle
1.5 1.8 TA = 25ºC 1.6 1.3 SWITCH 1.4 1.2 1.0 DA (A) (A) 1 I LIM I LIM 0.8 0.9 0.6 0.4 0.7 0.2 0.5 0 –50 –25 0 25 50 75 100 125 150 0 10 20 30 40 50 60 70 80 90 100 TEMPERATURE (°C) DUTY CYCLE (%) 3509 G13 3509 G14 3509fd For more information www.linear.com/LT3509 5 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Related Parts
