Datasheet LTC1778, LTC1778-1 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | Wide Operating Range, No RSENSE Step-Down Controller |
| Pages / Page | 24 / 6 — TYPICAL PERFOR A CE CHARACTERISTICS. Input and Shutdown Currents. Error … |
| Revision | B |
| File Format / Size | PDF / 273 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. Input and Shutdown Currents. Error Amplifier g. vs Input Voltage. INTV. m vs Temperature
Model Line for this Datasheet
Text Version of Document
LTC1778/LTC1778-1
W U TYPICAL PERFOR A CE CHARACTERISTICS Input and Shutdown Currents Error Amplifier g vs Input Voltage INTV m vs Temperature CC Load Regulation
2.0 1200 60 0 EXTVCC OPEN 1000 50 SHUTDOWN CURRENT ( 1.8 –0.1 A) µ 800 40 1.6 –0.2 SHUTDOWN (%) (mS) 600 30 CC g m INTV 1.4 ∆ –0.3 400 20 INPUT CURRENT ( µA) 1.2 –0.4 200 10 EXTVCC = 5V 1.0 0 0 –0.5 –50 –25 0 25 50 75 100 125 0 5 10 15 20 25 30 35 0 10 20 30 40 50 TEMPERATURE (°C) INPUT VOLTAGE (V) INTVCC LOAD CURRENT (mA) 1778 G13 1778 G24 1778 G25
EXTV RUN/SS Pin Current CC Switch Resistance vs Temperature FCB Pin Current vs Temperature vs Temperature
10 0 3 ) Ω –0.25 8 2 A) A) µ µ PULL-DOWN CURRENT –0.50 6 1 –0.75 4 0 –1.00 SWITCH RESISTANCE ( CC FCB PIN CURRENT ( FCB PIN CURRENT ( PULL-UP CURRENT 2 –1 –1.25 EXTV 0 –1.50 –2 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 1778 G14 1778 G15 1778 G16
RUN/SS Latchoff Thresholds Undervoltage Lockout Threshold vs Temperature vs Temperature
5.0 4.0 4.5 3.5 LATCHOFF ENABLE 4.0 3.0 RUN/SS THRESHOLD (V) 3.5 2.5 LATCHOFF THRESHOLD UNDERVOLTAGE LOCKOUT THRESHOLD (V) 3.0 2.0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (C) 1778 G17 1778 G18 1778fb 6
W U TYPICAL PERFOR A CE CHARACTERISTICS Input and Shutdown Currents Error Amplifier g vs Input Voltage INTV m vs Temperature CC Load Regulation
2.0 1200 60 0 EXTVCC OPEN 1000 50 SHUTDOWN CURRENT ( 1.8 –0.1 A) µ 800 40 1.6 –0.2 SHUTDOWN (%) (mS) 600 30 CC g m INTV 1.4 ∆ –0.3 400 20 INPUT CURRENT ( µA) 1.2 –0.4 200 10 EXTVCC = 5V 1.0 0 0 –0.5 –50 –25 0 25 50 75 100 125 0 5 10 15 20 25 30 35 0 10 20 30 40 50 TEMPERATURE (°C) INPUT VOLTAGE (V) INTVCC LOAD CURRENT (mA) 1778 G13 1778 G24 1778 G25
EXTV RUN/SS Pin Current CC Switch Resistance vs Temperature FCB Pin Current vs Temperature vs Temperature
10 0 3 ) Ω –0.25 8 2 A) A) µ µ PULL-DOWN CURRENT –0.50 6 1 –0.75 4 0 –1.00 SWITCH RESISTANCE ( CC FCB PIN CURRENT ( FCB PIN CURRENT ( PULL-UP CURRENT 2 –1 –1.25 EXTV 0 –1.50 –2 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 1778 G14 1778 G15 1778 G16
RUN/SS Latchoff Thresholds Undervoltage Lockout Threshold vs Temperature vs Temperature
5.0 4.0 4.5 3.5 LATCHOFF ENABLE 4.0 3.0 RUN/SS THRESHOLD (V) 3.5 2.5 LATCHOFF THRESHOLD UNDERVOLTAGE LOCKOUT THRESHOLD (V) 3.0 2.0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (C) 1778 G17 1778 G18 1778fb 6
