Datasheet LT1765, LT1765-1.8, LT1765-2.5, LT1765-3.3, LT1765-5 (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | Monolithic 3A, 1.25MHz Step-Down Switching Regulator |
| Seiten / Seite | 20 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS. FB vs Temperature (Adj). Switch On … |
| Dateiformat / Größe | PDF / 216 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS. FB vs Temperature (Adj). Switch On Voltage Drop. Oscillator Frequency
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Textversion des Dokuments
LT1765/LT1765-1.8/LT1765-2.5/ LT1765-3.3/LT1765-5
TYPICAL PERFORMANCE CHARACTERISTICS FB vs Temperature (Adj) Switch On Voltage Drop
1.220 350 1.215 T 300 A = 125°C 1.210 250 1.205 200 TA = –40°C 1.200 150 TA = 25°C 1.195 FB VOLTAGE (V) 100 1.190 SWITCH VOLTAGE (mV) 1.185 50 1.180 0 –50 –25 0 25 50 75 100 125 0 1 2 3 TEMPERATURE (°C) SWITCH CURRENT (A) 1765 G01 1765 G02
Oscillator Frequency SHDN Threshold vs Temperature
1.50 1.40 1.45 1.38 1.40 1.35 1.36 1.30 1.25 1.34 FREQUENCY (MHz) SHDN THRESHOLD (V) 1.20 1.32 1.15 1.10 1.30 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 1765 G03 1765 G04
SHDN Supply Current vs VIN SHDN IP Current vs Temperature
7 7 SHDN = 0V SHDN = 0V 6 6 5 5 4 4 3 3 CURRENT (μA) CURRENT (μA) IN IN V V 2 2 1 1 0 0 0 5 10 15 20 25 30 0 5 10 15 20 25 30 VIN (V) VIN (V) 1765 G05 1765 G05 1765fd 4
TYPICAL PERFORMANCE CHARACTERISTICS FB vs Temperature (Adj) Switch On Voltage Drop
1.220 350 1.215 T 300 A = 125°C 1.210 250 1.205 200 TA = –40°C 1.200 150 TA = 25°C 1.195 FB VOLTAGE (V) 100 1.190 SWITCH VOLTAGE (mV) 1.185 50 1.180 0 –50 –25 0 25 50 75 100 125 0 1 2 3 TEMPERATURE (°C) SWITCH CURRENT (A) 1765 G01 1765 G02
Oscillator Frequency SHDN Threshold vs Temperature
1.50 1.40 1.45 1.38 1.40 1.35 1.36 1.30 1.25 1.34 FREQUENCY (MHz) SHDN THRESHOLD (V) 1.20 1.32 1.15 1.10 1.30 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 1765 G03 1765 G04
SHDN Supply Current vs VIN SHDN IP Current vs Temperature
7 7 SHDN = 0V SHDN = 0V 6 6 5 5 4 4 3 3 CURRENT (μA) CURRENT (μA) IN IN V V 2 2 1 1 0 0 0 5 10 15 20 25 30 0 5 10 15 20 25 30 VIN (V) VIN (V) 1765 G05 1765 G05 1765fd 4