Datasheet LT8610A, LT8610AB (Analog Devices) - 8
| 制造商 | Analog Devices |
| 描述 | 42V, 3.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current |
| 页数 / 页 | 26 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS. Burst Frequency. Minimum Load to … |
| 文件格式/大小 | PDF / 382 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Burst Frequency. Minimum Load to Full Frequency. Frequency Foldback. Soft-Start Tracking
文件文字版本
LT8610A/LT8610AB Series
TYPICAL PERFORMANCE CHARACTERISTICS Burst Frequency Minimum Load to Full Frequency Frequency Foldback
800 80 800 VOUT = 3.3V VOUT = 3.3V 700 70 fSW = 700kHz 700 VIN = 12V PULSE-SKIPPING MODE VSYNC = 0V 600 60 600 RT = 60.4k LT8610A 500 50 500 LT8610AB 400 40 400 300 30 300 LOAD CURRENT (mA) 200 20 200 SWITCHING FREQUENCY (kHz) SWITCHING FREQUENCY (kHz) V 100 IN = 12V 10 100 VOUT = 3.3V L = 4.7µH 0 0 0 0 100 200 300 400 500 600 700 800 5 10 15 20 25 30 35 40 0 0.2 0.4 0.6 0.8 1 LOAD CURRENT (mA) INPUT VOLTAGE (V) FB VOLTAGE (V) 8610ab G21 8610ab G39 8610ab G22
Soft-Start Tracking Soft-Start Current PG High Thresholds
1.2 2.4 12.0 VSS = 0.5V 2.3 11.5 1.0 (%) 11.0 2.2 REF 0.8 10.5 2.1 FB RISING 10.0 0.6 2.0 9.5 9.0 FB FALLING FB VOLTAGE (V) 1.9 0.4 SS PIN CURRENT (µA) 8.5 1.8 0.2 8.0 1.7 PG THRESHOLD OFFSET FROM V 7.5 0 1.6 7.0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 –50 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TR/SS VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 8610ab G23 8610ab G24 8610ab G25
RT Programmed Switching PG Low Thresholds Frequency VIN UVLO
–7.0 250 3.6 –7.5 225 3.4 (%) –8.0 200 REF 3.2 –8.5 175 –9.0 150 3.0 FB RISING –9.5 125 2.8 –10.0 100 FB FALLING 2.6 –10.5 RT PIN RESISTOR (kΩ) 75 INPUT VOLTAGE (V) 2.4 –11.0 50 –11.5 25 2.2 PG THRESHOLD OFFSET FROM V –12.0 0 2.0 –55 –25 5 35 65 95 125 155 0.2 0.6 1 1.4 1.8 2.2 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) SWITCHING FREQUENCY (MHz) TEMPERATURE (°C) 8610ab G27 8610ab G26 8610ab G28 8610abfa 8 For more information www.linear.com/LT8610A 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
TYPICAL PERFORMANCE CHARACTERISTICS Burst Frequency Minimum Load to Full Frequency Frequency Foldback
800 80 800 VOUT = 3.3V VOUT = 3.3V 700 70 fSW = 700kHz 700 VIN = 12V PULSE-SKIPPING MODE VSYNC = 0V 600 60 600 RT = 60.4k LT8610A 500 50 500 LT8610AB 400 40 400 300 30 300 LOAD CURRENT (mA) 200 20 200 SWITCHING FREQUENCY (kHz) SWITCHING FREQUENCY (kHz) V 100 IN = 12V 10 100 VOUT = 3.3V L = 4.7µH 0 0 0 0 100 200 300 400 500 600 700 800 5 10 15 20 25 30 35 40 0 0.2 0.4 0.6 0.8 1 LOAD CURRENT (mA) INPUT VOLTAGE (V) FB VOLTAGE (V) 8610ab G21 8610ab G39 8610ab G22
Soft-Start Tracking Soft-Start Current PG High Thresholds
1.2 2.4 12.0 VSS = 0.5V 2.3 11.5 1.0 (%) 11.0 2.2 REF 0.8 10.5 2.1 FB RISING 10.0 0.6 2.0 9.5 9.0 FB FALLING FB VOLTAGE (V) 1.9 0.4 SS PIN CURRENT (µA) 8.5 1.8 0.2 8.0 1.7 PG THRESHOLD OFFSET FROM V 7.5 0 1.6 7.0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 –50 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TR/SS VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 8610ab G23 8610ab G24 8610ab G25
RT Programmed Switching PG Low Thresholds Frequency VIN UVLO
–7.0 250 3.6 –7.5 225 3.4 (%) –8.0 200 REF 3.2 –8.5 175 –9.0 150 3.0 FB RISING –9.5 125 2.8 –10.0 100 FB FALLING 2.6 –10.5 RT PIN RESISTOR (kΩ) 75 INPUT VOLTAGE (V) 2.4 –11.0 50 –11.5 25 2.2 PG THRESHOLD OFFSET FROM V –12.0 0 2.0 –55 –25 5 35 65 95 125 155 0.2 0.6 1 1.4 1.8 2.2 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) SWITCHING FREQUENCY (MHz) TEMPERATURE (°C) 8610ab G27 8610ab G26 8610ab G28 8610abfa 8 For more information www.linear.com/LT8610A 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