Datasheet LT8618, LT8618-3.3 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | High Efficiency 65V/100mA Synchronous Buck |
| Pages / Page | 20 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Frequency Foldback. Soft-Start … |
| File Format / Size | PDF / 2.9 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Frequency Foldback. Soft-Start Tracking. Soft-Start Current vs Temperature. VIN UVLO
Model Line for this Datasheet
- LT8618EDDB#TRMPBF LT8618EDDB#TRPBF LT8618EDDB#WTRMPBF LT8618EDDB#WTRPBF LT8618EDDB-3.3#TRMPBF LT8618EDDB-3.3#TRPBF LT8618EDDB-3.3#WTRMPBF LT8618EDDB-3.3#WTRPBF LT8618IDDB#TRMPBF LT8618IDDB#TRPBF LT8618IDDB#WTRMPBF LT8618IDDB#WTRPBF LT8618IDDB-3.3#TRMPBF LT8618IDDB-3.3#TRPBF LT8618IDDB-3.3#WTRMPBF LT8618IDDB-3.3#WTRPBF
Text Version of Document
LT8618/LT8618-3.3
TYPICAL PERFORMANCE CHARACTERISTICS Frequency Foldback Soft-Start Tracking
2500 1.0 2250 0.9 2000 0.8 1750 0.7 1500 0.6 1250 TAGE (V) 0.5 1000 0.4 FB VOL 750 0.3 SWITCHING FREQUENCY (kHz) 500 0.2 250 0.1 RT = 18.2kΩ 0 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 FB VOLTAGE (V) 8618 G19 TR/SS VOLTAGE (V) 8618 G20
Soft-Start Current vs Temperature VIN UVLO
2.5 3.2 3.1 2.4 3.0 2.3 2.9 T CURRENT (μA) UVLO (V) AR 2.2 2.8 V IN T-ST 2.7 SOF 2.1 2.6 2.0 2.5 −50 −25 0 25 50 75 100 125 150 −50 −25 0 25 50 75 100 125 150 TEMPERATURE (°C) 8618 G21 TEMPERATURE (°C) 8618 G22
Start-Up Dropout Start-Up Dropout
7 7 7 7 RLOAD = 500Ω RLOAD = 50Ω 6 6 6 6 5 5 OUTPUT VOL 5 5 OUTPUT VOL 4 4 4 4 TAGE (V) V TAGE (V) IN V IN T 3 3 TAGE (V) 3 3 AGE (V) INPUT VOL 2 2 INPUT VOL 2 2 V OUT V OUT 1 1 1 1 0 0 0 0 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 INPUT VOLTAGE (V) INPUT VOLTAGE (V) 8618 G23 8618 G24 Rev. 0 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Frequency Foldback Soft-Start Tracking
2500 1.0 2250 0.9 2000 0.8 1750 0.7 1500 0.6 1250 TAGE (V) 0.5 1000 0.4 FB VOL 750 0.3 SWITCHING FREQUENCY (kHz) 500 0.2 250 0.1 RT = 18.2kΩ 0 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 FB VOLTAGE (V) 8618 G19 TR/SS VOLTAGE (V) 8618 G20
Soft-Start Current vs Temperature VIN UVLO
2.5 3.2 3.1 2.4 3.0 2.3 2.9 T CURRENT (μA) UVLO (V) AR 2.2 2.8 V IN T-ST 2.7 SOF 2.1 2.6 2.0 2.5 −50 −25 0 25 50 75 100 125 150 −50 −25 0 25 50 75 100 125 150 TEMPERATURE (°C) 8618 G21 TEMPERATURE (°C) 8618 G22
Start-Up Dropout Start-Up Dropout
7 7 7 7 RLOAD = 500Ω RLOAD = 50Ω 6 6 6 6 5 5 OUTPUT VOL 5 5 OUTPUT VOL 4 4 4 4 TAGE (V) V TAGE (V) IN V IN T 3 3 TAGE (V) 3 3 AGE (V) INPUT VOL 2 2 INPUT VOL 2 2 V OUT V OUT 1 1 1 1 0 0 0 0 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 INPUT VOLTAGE (V) INPUT VOLTAGE (V) 8618 G23 8618 G24 Rev. 0 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
