Datasheet LT1941 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Triple Monolithic Switching Regulator |
| Pages / Page | 24 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Effi ciency, VOUT1 = 1.8V. Effi … |
| File Format / Size | PDF / 237 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Effi ciency, VOUT1 = 1.8V. Effi ciency, VOUT2 = 3.3V. Effi ciency, VOUT3 = –12V. SW1 VCESAT
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Text Version of Document
LT1941
TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency, VOUT1 = 1.8V Effi ciency, VOUT2 = 3.3V Effi ciency, VOUT3 = –12V
90 90 90 VIN = 5V VIN = 5V VIN = 5V TA = 25°C TA = 25°C TA = 25°C 80 80 80 70 70 70 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 60 60 60 50 50 50 0 0.5 1 1.5 2 2.5 0 0.25 0.5 0.75 1 1.25 1.5 0 50 100 150 200 250 300 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (mA) 1941 G01 1941 G07 1941 G08
SW1 VCESAT SW2 VCESAT SW3 VCESAT
500 600 500 T T A = 25°C A = 25°C TA = 25°C 500 400 400 400 300 300 TAGE (mV) TAGE (mV) TAGE (mV) 300 200 200 200 SWITCH VOL SWITCH VOL SWITCH VOL 100 100 100 0 0 0 0 0.5 1 1.5 2 2.5 3 0 0.5 1 1.5 2 0 0.25 0.5 0.75 1 1.25 1.5 SWITCH CURRENT (A) SWITCH CURRENT (A) SWITCH CURRENT (A) 1941 G02 1941 G09 1941 G10
SW1 Current Limit vs Duty Cycle SW2 Current Limit vs Duty Cycle BOOST2 Pin Current
5.0 3.0 40 TA = 25°C 4.5 TYPICAL 2.5 4.0 TYPICAL 30 3.5 2.0 3.0 MINIMUM MINIMUM 2.5 1.5 20 2.0 CURRENT LIMIT (A) 1.0 1.5 CURRENT LIMIT (A) BOOST CURRENT (mA) 10 1.0 0.5 0.5 0 0 0 0 20 40 60 80 100 0 20 40 60 80 100 0 0.5 1 1.5 2 DUTY CYCLE (%) DUTY CYCLE (%) SW2 PIN CURRENT (A) 1941 G03 1941 G06 1941 G11 1941fb 5
TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency, VOUT1 = 1.8V Effi ciency, VOUT2 = 3.3V Effi ciency, VOUT3 = –12V
90 90 90 VIN = 5V VIN = 5V VIN = 5V TA = 25°C TA = 25°C TA = 25°C 80 80 80 70 70 70 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 60 60 60 50 50 50 0 0.5 1 1.5 2 2.5 0 0.25 0.5 0.75 1 1.25 1.5 0 50 100 150 200 250 300 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (mA) 1941 G01 1941 G07 1941 G08
SW1 VCESAT SW2 VCESAT SW3 VCESAT
500 600 500 T T A = 25°C A = 25°C TA = 25°C 500 400 400 400 300 300 TAGE (mV) TAGE (mV) TAGE (mV) 300 200 200 200 SWITCH VOL SWITCH VOL SWITCH VOL 100 100 100 0 0 0 0 0.5 1 1.5 2 2.5 3 0 0.5 1 1.5 2 0 0.25 0.5 0.75 1 1.25 1.5 SWITCH CURRENT (A) SWITCH CURRENT (A) SWITCH CURRENT (A) 1941 G02 1941 G09 1941 G10
SW1 Current Limit vs Duty Cycle SW2 Current Limit vs Duty Cycle BOOST2 Pin Current
5.0 3.0 40 TA = 25°C 4.5 TYPICAL 2.5 4.0 TYPICAL 30 3.5 2.0 3.0 MINIMUM MINIMUM 2.5 1.5 20 2.0 CURRENT LIMIT (A) 1.0 1.5 CURRENT LIMIT (A) BOOST CURRENT (mA) 10 1.0 0.5 0.5 0 0 0 0 20 40 60 80 100 0 20 40 60 80 100 0 0.5 1 1.5 2 DUTY CYCLE (%) DUTY CYCLE (%) SW2 PIN CURRENT (A) 1941 G03 1941 G06 1941 G11 1941fb 5
