Datasheet LT1307, LT1307B (Analog Devices) - 6

LT1307/LT1307B
W U TYPICAL PERFOR A CE CHARACTERISTICS Feedback Voltage vs Oscillator Frequency vs Temperature LBI Reference vs Temperature Input Voltage
1.230 210 900 208 1.225 206 800 25°C 204 85°C 1.220 202 700 –40°C 1.215 200 198 600 1.210 196 FREQUENCY (kHz) FEEDBACK VOLTAGE (V) REFERENCE VOLTAGE (mV) 194 1.205 500 192 1.200 190 400 –50 –25 0 25 50 75 100 –50 –25 0 25 50 75 100 1 2 3 4 5 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 1307 G10 LT1307 • TPC11 LT1307 • TPC12
Transient Response (LT1307) Transient Response (LT1307B) Load Regulation (LT1307)
VOUT VOUT 200mV/DIV 200mV/DIV VOUT AC COUPLED AC COUPLED 50mV/DIV DC I COUPLED L IL 200mA/DIV OFFSET 200mA/DIV ADDED 55mA I 55mA LOAD I 5mA LOAD 5mA VIN = 1.25V 500µs/DIV 1307 G13 VIN = 1.25V 500µs/DIV 1307 G14 VIN = 0.92V ILOAD 10mA/DIV 1307 G15 VOUT = 3.3V VOUT = 3.3V VOUT = 3.3V
Load Regulation (LT1307) Load Regulation (LT1307) Load Regulation (LT1307)
V V V OUT OUT OUT 50mV/DIV 50mV/DIV 50mV/DIV DC DC DC COUPLED COUPLED COUPLED OFFSET OFFSET OFFSET ADDED ADDED ADDED V V IN = 1V ILOAD 20mA/DIV 1307 G16 IN = 1.15V ILOAD 20mA/DIV 1307 G17 VIN = 1V ILOAD 10mA/DIV 1307 G18 V V OUT = 3.3V OUT = 3.3V VOUT = 5V
Circuit Operation, L = 10
µ
H Circuit Operation, L = 22
µ
H Load Regulation (LT1307) (LT1307) (LT1307)
VOUT VOUT 50mV/DIV 50mV/DIV AC COUPLED VOUT AC COUPLED 50mV/DIV V DC SW 5V/DIV VSW COUPLED 5V/DIV OFFSET ADDED IL IL 100mA/DIV 100mA/DIV V V V IN = 1.25V 100µs/DIV 1307 G20 IN = 1.25V 100µs/DIV 1307 G21 IN = 1.15V ILOAD 10mA/DIV 1307 G19 V V V OUT = 5V OUT = 5V OUT = 5V I I LOAD = 1.5mA LOAD = 1.5mA 1307fa 6