Datasheet LT1573 (Analog Devices) - 4

LT1573
W U TYPICAL PERFOR A CE CHARACTERISTICS Drive Pin Current vs Drive Pin Saturation Voltage vs Latch-Disable Threshold Feedback Pin Voltage Drive Pin Current (VIN – VOUT) vs Temperature
450 1.0 0.85 TJ = 130°C 400 0.9 0.80 350 0.8 T 0.75 J = 25°C 0.7 300 TJ = 130°C 0.70 TJ = –45°C 0.6 (V) 250 0.65 OUT 0.5 200 T – V J = –45°C 0.60 0.4 IN V 150 0.55 0.3 VIN = 5V DRIVE PIN VOLTAGE (V) T DRIVE PIN CURRENT (mA) 100 J = 25°C 0.50 LATCH DISABLED FOR 0.2 (VIN – VOUT) < LATCH DISABLE THRESHOLD 50 0.1 0.45 0 0 0.40 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 50 100 150 200 250 300 –50 –25 0 25 50 75 100 125 150 FEEDBACK PIN VOLTAGE (V) DRIVE PIN CURRENT (mA) TEMPERATURE (°C) 1573 G07 1573 G08 1573 G09
Latch Pin Latch-Off Threshold vs Latch Charging Current vs Input Voltage Input Voltage Latching Current vs Input Voltage
3.0 16 1.0 0.9 14 TJ = 25°C 2.5 A) µ 0.8 12 TJ = 125°C T T TJ = –45°C 0.7 J = –45°C 2.0 J = 25°C TJ = –45°C 10 0.6 T 1.5 8 J = 25°C 0.5 TJ = 125°C 0.4 6 1.0 T 0.3 4 J = 125°C LATCHING CURRENT (mA) 0.2 0.5 LATCH CHARGING CURRENT ( 2 LATCH PIN LATCH-OFF THRESHOLD (V) 0.1 0 0 0 2 3 4 5 6 7 8 2 3 4 5 6 7 8 2 3 4 5 6 7 8 INPUT VOLTAGE (V) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1573 G10 1573 G11 1573 G12
Shutdown Voltage Threshold vs Shutdown Pin Current vs Temperature Shutdown Pin Voltage
300 1.5 TJ = –45°C A) 250 1.4 µ TJ = 25°C 200 1.3 150 TJ = 125°C 1.2 100 SHUTDOWN THRESHOLD (V) 1.1 SHUTDOWN PIN CURRENT ( 50 1.0 0 0 1 2 3 4 5 6 7 –50 –25 0 25 50 75 100 125 150 SHUTDOWN PIN VOLTAGE (V) TEMPERATURE (°C) 1573 G14 1573 G13 sn1573 1573fas 4