Datasheet LT1374 (Analog Devices) - 5

LT1374
W U TYPICAL PERFOR A CE CHARACTERISTICS Shutdown Supply Current Error Amplifier Transconductance Error Amplifier Transconductance
70 2500 3000 200 60 PHASE A) 2000 2500 150 µ VIN = 25V 50 Mho) µ V GAIN PHASE (DEG) IN = 10V 1500 2000 100 40 Mho) µ VC 30 1000 1500 R C OUT OUT GAIN ( 50 VFB 2 ( × 10–3) 200k 12pF 20 INPUT SUPPLY CURRENT ( 500 1000 ERROR AMPLIFIER EQUIVALENT CIRCUIT TRANSCONDUCTANCE ( 0 10 RLOAD = 50Ω 0 0 500 –50 0 0.1 0.2 0.3 0.4 –50 –25 0 25 50 75 100 125 100 1k 10k 100k 1M 10M SHUTDOWN VOLTAGE (V) JUNCTION TEMPERATURE (°C) FREQUENCY (Hz) 1374 G07 1374 G09 1374 G08
Minimum Input Voltage Frequency Foldback Switching Frequency with 5V Output
A) 550 6.4 µ 500 540 6.2 400 530 MINIMUM SWITCHING 6.0 STARTING FREQUENCY 520 VOLTAGE 300 510 5.8 500 5.6 MINIMUM 200 490 RUNNING FREQUENCY (kHz) INPUT VOLTAGE (V) 480 5.4 VOLTAGE 100 470 FEEDBACK PIN 5.2 CURRENT 460 450 5.0 SWITCHING FREQUENCY (kHz) OR CURRENT ( 0 0 0.5 1.0 1.5 2.0 2.5 – 50 –25 0 25 50 75 100 125 1 10 100 1000 FEEDBACK PIN VOLTAGE (V) TEMPERATURE ( LOAD CURRENT (mA) °C) 1374 G12 1374 G10 1374 G11
Maximum Load Current Maximum Load Current Maximum Load Current at VOUT = 10V at VOUT = 3.3V at VOUT = 5V
4.5 4.5 4.5 V L = 20 OUT = 10V µH L = 20 L = 20 µH µH L = 10µH L = 10µH L = 10µH 4.0 4.0 L = 5µH 4.0 L = 5µH L = 5µH CURRENT (A) CURRENT (A) CURRENT (A) 3.5 3.5 3.5 VOUT = 3.3V VOUT = 5V 3.0 3.0 3.0 0 5 10 15 20 25 0 5 10 15 20 25 0 5 10 15 20 25 INPUT VOLTAGE (V) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1374 G13 1374 G14 1374 G15 1374fd 5