Datasheet LTC3815 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 6A Monolithic Synchronous DC/DC Step-Down Converter with Digital Power System Management |
| Pages / Page | 42 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Load Step. Efficiency vs Load … |
| Revision | B |
| File Format / Size | PDF / 3.0 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Load Step. Efficiency vs Load Current. Efficiency vs Input Voltage
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Text Version of Document
LTC3815
TYPICAL PERFORMANCE CHARACTERISTICS Load Step Efficiency vs Load Current Efficiency vs Input Voltage (Forced Continuous Mode)
100 100 VIN = 3.3V, VOUT = 1.8V VOUT = 1.0V 90 fSW = 1MHz CCM Mode 80 90 VOUT 70 50mV/DIV 60 80 50 I 40 70 LOAD 5A/DIV EFFICIENCY (%) EFFICIENCY (%) 30 LOAD = 1A, f = 1MHz 20 60 LOAD = 6A, f = 1MHz CCM Mode 3815 G03 10 LOAD = 1A, f = 2MHz 10µs/DIV DCM Mode LOAD = 6A, f = 2MHz VOUT = 1V 0 50 ILOAD = 0A TO 5A 0.01 0.1 1 10 2 3 4 5 6 CCM MODE LOAD CURRENT (A) INPUT VOLTAGE (V) FRONT PAGE CIRCUIT 3815 G01 3815 G02
Load Step (Discontinuous Mode) Output Margining Load Regulation
0.20 VIN = 3.3V MARGIN VOUT 2V/DIV 0.10 50mV/DIV VOUT 200mV/DIV 0 ILOAD ERROR (%) 5A/DIV CSLEW V OUT 1V/DIV –0.10 10µs/DIV 3815 G04 1ms/DIV 3815 G05 VOUT = 1V I MARGIN REGISTERS PRE-LOADED LOAD = 0A TO 5A –0.20 DCM MODE TO 10% AND –10% –6 –4 –2 0 2 4 6 FRONT PAGE CIRCUIT CSLEW = 10pF LOAD CURRENT (A) 3815 G06
Forced Continuous Mode Line Regulation Discontinuous Mode Operation Operation
0.20 0.10 VOUT VOUT 20mV/DIV 20mV/DIV 0 ERROR (%) IL IL 1A/DIV 1A/DIV V OUT –0.10 IOUT = 6A CCM MODE 5µs/DIV 3815 G08 1µs/DIV 3815 G09 FRONT PAGE CIRCUIT VOUT = 1.8V VOUT = 1.8V –0.20 ILOAD = 100mA ILOAD = 100mA 2 3 4 5 6 VMODE = 3.3V VMODE = 0V INPUT VOLTAGE (V) FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT 3815 G07 Rev B 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 Applications Information PMBus Command Details Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Load Step Efficiency vs Load Current Efficiency vs Input Voltage (Forced Continuous Mode)
100 100 VIN = 3.3V, VOUT = 1.8V VOUT = 1.0V 90 fSW = 1MHz CCM Mode 80 90 VOUT 70 50mV/DIV 60 80 50 I 40 70 LOAD 5A/DIV EFFICIENCY (%) EFFICIENCY (%) 30 LOAD = 1A, f = 1MHz 20 60 LOAD = 6A, f = 1MHz CCM Mode 3815 G03 10 LOAD = 1A, f = 2MHz 10µs/DIV DCM Mode LOAD = 6A, f = 2MHz VOUT = 1V 0 50 ILOAD = 0A TO 5A 0.01 0.1 1 10 2 3 4 5 6 CCM MODE LOAD CURRENT (A) INPUT VOLTAGE (V) FRONT PAGE CIRCUIT 3815 G01 3815 G02
Load Step (Discontinuous Mode) Output Margining Load Regulation
0.20 VIN = 3.3V MARGIN VOUT 2V/DIV 0.10 50mV/DIV VOUT 200mV/DIV 0 ILOAD ERROR (%) 5A/DIV CSLEW V OUT 1V/DIV –0.10 10µs/DIV 3815 G04 1ms/DIV 3815 G05 VOUT = 1V I MARGIN REGISTERS PRE-LOADED LOAD = 0A TO 5A –0.20 DCM MODE TO 10% AND –10% –6 –4 –2 0 2 4 6 FRONT PAGE CIRCUIT CSLEW = 10pF LOAD CURRENT (A) 3815 G06
Forced Continuous Mode Line Regulation Discontinuous Mode Operation Operation
0.20 0.10 VOUT VOUT 20mV/DIV 20mV/DIV 0 ERROR (%) IL IL 1A/DIV 1A/DIV V OUT –0.10 IOUT = 6A CCM MODE 5µs/DIV 3815 G08 1µs/DIV 3815 G09 FRONT PAGE CIRCUIT VOUT = 1.8V VOUT = 1.8V –0.20 ILOAD = 100mA ILOAD = 100mA 2 3 4 5 6 VMODE = 3.3V VMODE = 0V INPUT VOLTAGE (V) FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT 3815 G07 Rev B 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 Applications Information PMBus Command Details Typical Applications Package Description Revision History Typical Application Related Parts
