Datasheet LT1934, LT1934 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | Micropower Step-Down Switching Regulators in ThinSOT |
| Pages / Page | 20 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS. LT1934 Effi ciency, VOUT = 5V. LT1934 … |
| File Format / Size | PDF / 245 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. LT1934 Effi ciency, VOUT = 5V. LT1934 Effi ciency, VOUT = 3.3V
Model Line for this Datasheet
- LT1934EDCB#PBF LT1934EDCB#TRMPBF LT1934EDCB#TRPBF LT1934EDCB-1#PBF LT1934EDCB-1#TRMPBF LT1934EDCB-1#TRPBF LT1934ES6#TRMPBF LT1934ES6#TRPBF LT1934ES6-1#TRMPBF LT1934ES6-1#TRPBF LT1934IDCB#PBF LT1934IDCB#TRMPBF LT1934IDCB#TRPBF LT1934IDCB-1#PBF LT1934IDCB-1#TRMPBF LT1934IDCB-1#TRPBF LT1934IS6#PBF LT1934IS6#TRMPBF LT1934IS6#TRPBF LT1934IS6-1#PBF LT1934IS6-1#TRMPBF LT1934IS6-1#TRPBF
Text Version of Document
LT1934/LT1934-1
TYPICAL PERFORMANCE CHARACTERISTICS LT1934 Effi ciency, VOUT = 5V LT1934 Effi ciency, VOUT = 3.3V LT1934-1 Effi ciency, VOUT = 5V
100 100 100 LT1934 LT1934 LT1934-1 VOUT = 5V VOUT = 3.3V VOUT = 5V L = 47μH L = 47μH L = 150μH 90 90 90 TA = 25°C TA = 25°C TA = 25°C VIN = 12V VIN = 5V VIN = 12V 80 V 80 80 IN = 24V VIN = 24V V V IN = 24V IN = 12V 70 70 70 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 60 60 60 50 50 50 0.1 1 10 100 0.1 1 10 100 0.1 1 10 100 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 1934 G01 1934 G02 1934 G03
LT1934-1 Effi ciency, VOUT = 3.3V Current Limit vs Temperature Off Time vs Temperature
100 500 3.0 LT1934-1 V LT1934 OUT = 3.3V L = 100μH 2.5 90 400 TA = 25°C 2.0 s) 80 VIN = 12V 300 μ 1.5 VIN = 24V 70 200 EFFICIENCY (%) OFF TIME ( LT1934-1 1.0 60 SWITCH CURRENT LIMIT (mA) 100 0.5 50 0 0 0.1 1 10 100 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (mA) 1934 G04 1934 G05 1934 G06
SHDN Bias Current Frequency Foldback VFB vs Temperature vs SHDN Voltage
16 1.27 2.0 TA = 25oC TA = 25°C 14 1.26 1.5 s) 12 μ 10 1.25 8 1.0 6 1.24 PIN CURRENT (μA) SWITCH OFF TIME ( 4 FEEDBACK VOLTAGE (V) SHDN 0.5 1.23 2 0 1.22 0 0 0.2 0.4 0.6 0.8 1.0 1.2 –50 –25 0 25 50 75 100 125 0 2 4 6 8 10 12 FEEDBACK PIN VOLTAGE (V) TEMPERATURE (°C) SHDN PIN VOLTAGE (V) 1934 G07 1934 G08 1934 G09 1934fe 4
TYPICAL PERFORMANCE CHARACTERISTICS LT1934 Effi ciency, VOUT = 5V LT1934 Effi ciency, VOUT = 3.3V LT1934-1 Effi ciency, VOUT = 5V
100 100 100 LT1934 LT1934 LT1934-1 VOUT = 5V VOUT = 3.3V VOUT = 5V L = 47μH L = 47μH L = 150μH 90 90 90 TA = 25°C TA = 25°C TA = 25°C VIN = 12V VIN = 5V VIN = 12V 80 V 80 80 IN = 24V VIN = 24V V V IN = 24V IN = 12V 70 70 70 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 60 60 60 50 50 50 0.1 1 10 100 0.1 1 10 100 0.1 1 10 100 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 1934 G01 1934 G02 1934 G03
LT1934-1 Effi ciency, VOUT = 3.3V Current Limit vs Temperature Off Time vs Temperature
100 500 3.0 LT1934-1 V LT1934 OUT = 3.3V L = 100μH 2.5 90 400 TA = 25°C 2.0 s) 80 VIN = 12V 300 μ 1.5 VIN = 24V 70 200 EFFICIENCY (%) OFF TIME ( LT1934-1 1.0 60 SWITCH CURRENT LIMIT (mA) 100 0.5 50 0 0 0.1 1 10 100 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (mA) 1934 G04 1934 G05 1934 G06
SHDN Bias Current Frequency Foldback VFB vs Temperature vs SHDN Voltage
16 1.27 2.0 TA = 25oC TA = 25°C 14 1.26 1.5 s) 12 μ 10 1.25 8 1.0 6 1.24 PIN CURRENT (μA) SWITCH OFF TIME ( 4 FEEDBACK VOLTAGE (V) SHDN 0.5 1.23 2 0 1.22 0 0 0.2 0.4 0.6 0.8 1.0 1.2 –50 –25 0 25 50 75 100 125 0 2 4 6 8 10 12 FEEDBACK PIN VOLTAGE (V) TEMPERATURE (°C) SHDN PIN VOLTAGE (V) 1934 G07 1934 G08 1934 G09 1934fe 4
