Datasheet LT3477 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | 3A, DC/DC Converter with Dual Rail-to-Rail Current Sense |
| 页数 / 页 | 22 / 4 — Typical perForMance characTerisTics. Switch VCE(SAT). Switch Current … |
| 文件格式/大小 | PDF / 585 Kb |
| 文件语言 | 英语 |
Typical perForMance characTerisTics. Switch VCE(SAT). Switch Current Limit. VREF. SHDN Pin Turn-On Threshold. SHDN Pin Current
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LT3477
Typical perForMance characTerisTics Switch VCE(SAT) Switch Current Limit VREF
0.50 5 1.27 0.45 1.26 0.40 4 0.35 125°C 1.25 (V) 0.30 3 25°C T) 0.25 (V) 1.24 VIN = 25V V REF V CE(SA 0.20 –50°C CURRENT (A) 2 V 0.15 1.23 IN = 2.5V 0.10 1 1.22 0.05 0 0 1.21 0 0.5 1 1.5 2 2.5 3 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 150 SWITCH CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 3477 G01 3477 G02 3477 G03
SHDN Pin Turn-On Threshold SHDN Pin Current Quiescent Current
1.6 50 6 VC = 0.3V –50°C 40 5 1.4 30 25°C 4 THRESHOLD (V) PIN CURRENT (µA) 20 1.2 125°C SHDN SHDN 3 10 QUIESCENT CURRENT (mA) 1.0 0 2 –50 –25 0 25 50 75 100 125 0 5 10 15 20 25 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) VSHDN (V) TEMPERATURE (°C) 3477 G04 3477 G05 3477 G06
Soft-Start Pin Current Oscillator Frequency Feedback Amplifier Offset Voltage
20 2.0 4 R 3 T = 10kΩ 1.6 15 2 VC = 1V 1.2 R 1 T = 15kΩ (µA) 10 0 VC = 0.5V I SS RT = 20kΩ 0.8 –1 FREQUENCY (MHz) 5 OFFSET VOLTAGE (mV) –2 0.4 –3 0 0 –4 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3477 G07 3477 G08 3477 G09 3477fd 4 For more information www.linear.com/LT3477 Document Outline Description Typical Application Absolute Maximum Ratings Electrical Characteristics Typical Performance Characteristics Pin Functions Package Description Typical Application Related Parts
Typical perForMance characTerisTics Switch VCE(SAT) Switch Current Limit VREF
0.50 5 1.27 0.45 1.26 0.40 4 0.35 125°C 1.25 (V) 0.30 3 25°C T) 0.25 (V) 1.24 VIN = 25V V REF V CE(SA 0.20 –50°C CURRENT (A) 2 V 0.15 1.23 IN = 2.5V 0.10 1 1.22 0.05 0 0 1.21 0 0.5 1 1.5 2 2.5 3 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 150 SWITCH CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 3477 G01 3477 G02 3477 G03
SHDN Pin Turn-On Threshold SHDN Pin Current Quiescent Current
1.6 50 6 VC = 0.3V –50°C 40 5 1.4 30 25°C 4 THRESHOLD (V) PIN CURRENT (µA) 20 1.2 125°C SHDN SHDN 3 10 QUIESCENT CURRENT (mA) 1.0 0 2 –50 –25 0 25 50 75 100 125 0 5 10 15 20 25 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) VSHDN (V) TEMPERATURE (°C) 3477 G04 3477 G05 3477 G06
Soft-Start Pin Current Oscillator Frequency Feedback Amplifier Offset Voltage
20 2.0 4 R 3 T = 10kΩ 1.6 15 2 VC = 1V 1.2 R 1 T = 15kΩ (µA) 10 0 VC = 0.5V I SS RT = 20kΩ 0.8 –1 FREQUENCY (MHz) 5 OFFSET VOLTAGE (mV) –2 0.4 –3 0 0 –4 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3477 G07 3477 G08 3477 G09 3477fd 4 For more information www.linear.com/LT3477 Document Outline Description Typical Application Absolute Maximum Ratings Electrical Characteristics Typical Performance Characteristics Pin Functions Package Description Typical Application Related Parts