Datasheet LTC3670 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | Monolithic 400mA Buck Regulator with Dual 150mA LDOs in 3mm × 2mm DFN |
| Pages / Page | 14 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted). … |
| Revision | A |
| File Format / Size | PDF / 401 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted). Buck Regulated Feedback Voltage
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LTC3670
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted) Buck Regulated Feedback Voltage Regulated LDO Feedback Pin VIN Supply Current vs VIN vs Temperature Voltage vs Temperature
120 820 820 ALL THREE OUTPUTS ENABLED, UNITY GAIN, V(OUT) = V(BUCKFB) UNITY GAIN, V(OUT) = V(LDO_FB) NO LOAD 815 I(OUT) = 100mA 815 I(OUT) = 0.1mA 100 130°C TAGE (mV) 810 810 90°C TAGE (mV) 80 25°C 805 VIN = 5.5V VIN = 4.2V 805 60 –45°C 800 800 Y CURRENT (µA) VIN = 2.5V 795 V 795 SUPPL 40 IN = 3.6V TED BUCKFB PIN VOL V IN 790 790 VIN = 2.5V 20 TED LDO FEEDBACK PIN VOL V 785 IN = 3.6V REGULA 785 VIN = 4.2V VIN = 5.5V 0 780 REGULA 780 2.5 3 3.5 4 4.5 5 5.5 –50 –30 –10 10 30 50 70 90 110 130 –50 –30 –10 10 30 50 70 90 110 130 VIN (V) TEMPERATURE (˚C) TEMPERATURE (˚C) 3670 G02 3670 G01 3670 G03
LDO Dropout vs Load Current Buck Load Regulation LDO Load Regulation at VIN = 2.5V
820 820 300 VIN = 3.6V VIN = 3.6V VIN = 2.5V 815 815 130°C 250 810 810 TAGE (mV) 200 805 TAGE (mV) 805 90°C TAGE (mV) 800 800 150 –45°C 795 795 100 BUCKFB PIN VOL 790 790 DROPOUT VOL 25°C 50 785 LDO FEEDBACK PIN VOL 785 780 780 0 0 50 100 150 200 250 300 350 400 0 25 50 75 100 125 150 0 25 50 75 100 125 150 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3670 G04 3670 G05 3670 G06
LDO Dropout vs Load Current Buck Oscillator Frequency at VIN = 3.6V LDO Short-Circuit Current vs VIN vs Temperature
300 500 2.35 VIN = 3.6V VIN = 5.5V V 450 2.30 IN = 4.2V 250 400 2.25 V 350 IN = 3.6V 200 130°C 2.20 300 V TAGE (mV) 2.15 IN = 2.5V 150 90°C 250 2.10 200 TOR FREQUENCY (MHz) 100 –45°C 2.05 T-CIRCUIT CURRENT (mA) 150 DROPOUT VOL 2.00 50 SHOR 100 – 45°C OSCILLA 25°C 50 25°C 1.95 90°C 0 0 1.90 0 25 50 75 100 125 150 2.5 3 3.5 4 4.5 5 5.5 –50 –30 –10 10 30 50 70 90 110 130 LOAD CURRENT (mA) VIN (V) TEMPERATURE (˚C) 3670 G07 3670 G09 3670 G08 Rev A 4 For more information www.analog.com Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted) Buck Regulated Feedback Voltage Regulated LDO Feedback Pin VIN Supply Current vs VIN vs Temperature Voltage vs Temperature
120 820 820 ALL THREE OUTPUTS ENABLED, UNITY GAIN, V(OUT) = V(BUCKFB) UNITY GAIN, V(OUT) = V(LDO_FB) NO LOAD 815 I(OUT) = 100mA 815 I(OUT) = 0.1mA 100 130°C TAGE (mV) 810 810 90°C TAGE (mV) 80 25°C 805 VIN = 5.5V VIN = 4.2V 805 60 –45°C 800 800 Y CURRENT (µA) VIN = 2.5V 795 V 795 SUPPL 40 IN = 3.6V TED BUCKFB PIN VOL V IN 790 790 VIN = 2.5V 20 TED LDO FEEDBACK PIN VOL V 785 IN = 3.6V REGULA 785 VIN = 4.2V VIN = 5.5V 0 780 REGULA 780 2.5 3 3.5 4 4.5 5 5.5 –50 –30 –10 10 30 50 70 90 110 130 –50 –30 –10 10 30 50 70 90 110 130 VIN (V) TEMPERATURE (˚C) TEMPERATURE (˚C) 3670 G02 3670 G01 3670 G03
LDO Dropout vs Load Current Buck Load Regulation LDO Load Regulation at VIN = 2.5V
820 820 300 VIN = 3.6V VIN = 3.6V VIN = 2.5V 815 815 130°C 250 810 810 TAGE (mV) 200 805 TAGE (mV) 805 90°C TAGE (mV) 800 800 150 –45°C 795 795 100 BUCKFB PIN VOL 790 790 DROPOUT VOL 25°C 50 785 LDO FEEDBACK PIN VOL 785 780 780 0 0 50 100 150 200 250 300 350 400 0 25 50 75 100 125 150 0 25 50 75 100 125 150 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3670 G04 3670 G05 3670 G06
LDO Dropout vs Load Current Buck Oscillator Frequency at VIN = 3.6V LDO Short-Circuit Current vs VIN vs Temperature
300 500 2.35 VIN = 3.6V VIN = 5.5V V 450 2.30 IN = 4.2V 250 400 2.25 V 350 IN = 3.6V 200 130°C 2.20 300 V TAGE (mV) 2.15 IN = 2.5V 150 90°C 250 2.10 200 TOR FREQUENCY (MHz) 100 –45°C 2.05 T-CIRCUIT CURRENT (mA) 150 DROPOUT VOL 2.00 50 SHOR 100 – 45°C OSCILLA 25°C 50 25°C 1.95 90°C 0 0 1.90 0 25 50 75 100 125 150 2.5 3 3.5 4 4.5 5 5.5 –50 –30 –10 10 30 50 70 90 110 130 LOAD CURRENT (mA) VIN (V) TEMPERATURE (˚C) 3670 G07 3670 G09 3670 G08 Rev A 4 For more information www.analog.com Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Application Related Parts
