Datasheet LT3380 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | Multioutput Power Management Solution with 4 Buck Switching and 3 LDO Linear Regulators with I2C |
| Pages / Page | 28 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS VIN = 3.8V, TA = 25°C unless … |
| File Format / Size | PDF / 1.6 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS VIN = 3.8V, TA = 25°C unless otherwise noted. Step-Down Switching Regulator
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LT3380
TYPICAL PERFORMANCE CHARACTERISTICS VIN = 3.8V, TA = 25°C unless otherwise noted Step-Down Switching Regulator Standby IVIN vs VIN LDO1 to LDO3 IVIN vs VIN IVIN vs VIN
16 250 900 PULSE-SKIPPING MODE ENABLE 3 LDOs 14 800 ENABLE FOUR BUCKS 200 12 700 ENABLE 2 LDOs ENABLE THREE BUCKS 600 10 150 500 ENABLE TWO BUCKS (µA) 8 (µA) ENABLE 1 LDO (µA) I VIN I VIN I VIN 400 ENABLE ONE BUCK 6 100 300 4 50 200 2 100 0 0 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 2.50 3.50 4.50 5.50 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VIN (V) VIN (V) VIN (V) 3380 G01 3380 G02 3380 G03
Step-Down Switching Regulator Input Supply Current Oscillator Frequency IVIN vs VIN vs Temperature vs Temperature
180 1200 2.30 Burst Mode OPERATION ALL REGULATORS ENABLED 160 1000 2.25 140 ENABLE FOUR BUCKS PULSE-SKIPPING 120 ENABLE THREE BUCKS 800 2.20 100 (µA) ENABLE TWO BUCKS (µA) 600 2.15 I VIN 80 I VIN ENABLE ONE BUCK 60 400 Burst Mode OPERATION FREQUENCY (MHz) 2.10 40 200 2.05 20 STANDBY 0 0 2.00 2.5 3.0 3.5 4.0 4.5 5.0 5.5 –50 0 50 100 150 –50 0 50 100 150 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 3380 G04 3380 G05 3380 G06
Oscillator Frequency Change Step-Down Switching Regulators 3 Step-Down Switching Regulators 3 vs VIN and 4 Efficiency vs IOUT and 4 Efficiency vs IOUT
0.8 100 100 0.6 90 90 80 80 0.4 BURST BURST 70 70 0.2 60 60 PULSE 0 50 PULSE 50 SKIPPING SKIPPING –0.2 40 40 EFFICIENCY (%) FORCED EFFICIENCY (%) FORCED PERCENT CHANGE (%) 30 30 –0.4 CONTINUOUS CONTINUOUS 20 20 –0.6 10 VIN = 3.3V 10 VIN = 5V VOUT = 1.2V VOUT = 1.2V –0.8 0 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1 10 100 1000 1 10 100 1000 VIN (V) IOUT (mA) IOUT (mA) 3380 G07 3380 G08 3380 G09 Rev. 0 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Introduction Step-Down Switching Regulators Slewing DAC Reference Operation Power On Sequencing Power Off Sequencing Fault Detectionand Reporting I2C Operation Applications Information Thermal Considerations and Board Layout Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS VIN = 3.8V, TA = 25°C unless otherwise noted Step-Down Switching Regulator Standby IVIN vs VIN LDO1 to LDO3 IVIN vs VIN IVIN vs VIN
16 250 900 PULSE-SKIPPING MODE ENABLE 3 LDOs 14 800 ENABLE FOUR BUCKS 200 12 700 ENABLE 2 LDOs ENABLE THREE BUCKS 600 10 150 500 ENABLE TWO BUCKS (µA) 8 (µA) ENABLE 1 LDO (µA) I VIN I VIN I VIN 400 ENABLE ONE BUCK 6 100 300 4 50 200 2 100 0 0 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 2.50 3.50 4.50 5.50 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VIN (V) VIN (V) VIN (V) 3380 G01 3380 G02 3380 G03
Step-Down Switching Regulator Input Supply Current Oscillator Frequency IVIN vs VIN vs Temperature vs Temperature
180 1200 2.30 Burst Mode OPERATION ALL REGULATORS ENABLED 160 1000 2.25 140 ENABLE FOUR BUCKS PULSE-SKIPPING 120 ENABLE THREE BUCKS 800 2.20 100 (µA) ENABLE TWO BUCKS (µA) 600 2.15 I VIN 80 I VIN ENABLE ONE BUCK 60 400 Burst Mode OPERATION FREQUENCY (MHz) 2.10 40 200 2.05 20 STANDBY 0 0 2.00 2.5 3.0 3.5 4.0 4.5 5.0 5.5 –50 0 50 100 150 –50 0 50 100 150 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 3380 G04 3380 G05 3380 G06
Oscillator Frequency Change Step-Down Switching Regulators 3 Step-Down Switching Regulators 3 vs VIN and 4 Efficiency vs IOUT and 4 Efficiency vs IOUT
0.8 100 100 0.6 90 90 80 80 0.4 BURST BURST 70 70 0.2 60 60 PULSE 0 50 PULSE 50 SKIPPING SKIPPING –0.2 40 40 EFFICIENCY (%) FORCED EFFICIENCY (%) FORCED PERCENT CHANGE (%) 30 30 –0.4 CONTINUOUS CONTINUOUS 20 20 –0.6 10 VIN = 3.3V 10 VIN = 5V VOUT = 1.2V VOUT = 1.2V –0.8 0 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1 10 100 1000 1 10 100 1000 VIN (V) IOUT (mA) IOUT (mA) 3380 G07 3380 G08 3380 G09 Rev. 0 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Introduction Step-Down Switching Regulators Slewing DAC Reference Operation Power On Sequencing Power Off Sequencing Fault Detectionand Reporting I2C Operation Applications Information Thermal Considerations and Board Layout Typical Applications Package Description Typical Application Related Parts
