Datasheet LT8619, LT8619-5 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | 60V, 1.2A Synchronous Monolithic Buck Regulator with 6μA Quiescent Current |
| Pages / Page | 28 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS. Forced Continuous Mode No Load. … |
| Revision | A |
| File Format / Size | PDF / 1.2 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Forced Continuous Mode No Load. Forced Continuous Mode Switching. Switching Waveform
Model Line for this Datasheet
LT8619
Text Version of Document
LT8619/LT8619-5
TYPICAL PERFORMANCE CHARACTERISTICS Forced Continuous Mode No Load Forced Continuous Mode Switching Switching Waveform Waveform at Minimum On-time
IL VOUT (AC) 200mA/DIV 2mV/DIV SW 20V/DIV IL 200mA/DIV SW SW (ZOOM IN) 10V/DIV 10V/DIV 200ns/DIV 8619 G28 TOP = 200ns/DIV, BOT = 5ns/DIV, 8619 G29 V PERSISTENCE MODE IN = 12V, VOUT = 3.3V fSW = 2MHz, L = 3.3μH, COUT = 22μF VIN = 53.7V, VOUT = 3.3V, 0.5A LOAD fSW = 2MHz, L = 3.3μH, COUT = 22μF
Forced Continuous Mode Transient Pulse-Skipping Mode Transient Load Step from 10mA to 1A Load Step from 10mA to 1A
VOUT VOUT 200mV/DIV 200mV/DIV I I LOAD LOAD 1A/DIV 1A/DIV SW SW 10V/DIV 10V/DIV 20μs/DIV 8619 G30 20μs/DIV 8619 G31 VIN = 12V, VOUT = 3.3V VIN = 12V, VOUT = 3.3V fOSC = 2MHz, L = 3.3μH, COUT = 22μF fOSC = 2MHz, L = 3.3μH, COUT = 22μF
Bust Mode Transient Load Step Forced Continuous Mode from 10mA to 1A Frequency Synchronization
VOUT (AC) 20mV/DIV VOUT SYNC 200mV/DIV 2V/DIV SW 10V/DIV ILOAD 1A/DIV VOUT (AC, ZOOM IN) 20mV/DIV SYNC (ZOOM IN) SW 2V/DIV 10V/DIV SW (ZOOM IN) 10V/DIV 20μs/DIV 8619 G32 8619 G33 TOP = 10μs/DIV, BOT = 200ns/DIV VIN = 12V, VOUT = 3.3V VIN = 12V, VOUT = 3.3V, NO LOAD fOSC = 2MHz, L = 3.3μH, COUT = 22μF fOSC = 700kHz, L = 10μH, COUT = 22μF fSW (FREE RUNNING) = 700kHZ, fSYNC = 1.2MHz Rev A 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Forced Continuous Mode No Load Forced Continuous Mode Switching Switching Waveform Waveform at Minimum On-time
IL VOUT (AC) 200mA/DIV 2mV/DIV SW 20V/DIV IL 200mA/DIV SW SW (ZOOM IN) 10V/DIV 10V/DIV 200ns/DIV 8619 G28 TOP = 200ns/DIV, BOT = 5ns/DIV, 8619 G29 V PERSISTENCE MODE IN = 12V, VOUT = 3.3V fSW = 2MHz, L = 3.3μH, COUT = 22μF VIN = 53.7V, VOUT = 3.3V, 0.5A LOAD fSW = 2MHz, L = 3.3μH, COUT = 22μF
Forced Continuous Mode Transient Pulse-Skipping Mode Transient Load Step from 10mA to 1A Load Step from 10mA to 1A
VOUT VOUT 200mV/DIV 200mV/DIV I I LOAD LOAD 1A/DIV 1A/DIV SW SW 10V/DIV 10V/DIV 20μs/DIV 8619 G30 20μs/DIV 8619 G31 VIN = 12V, VOUT = 3.3V VIN = 12V, VOUT = 3.3V fOSC = 2MHz, L = 3.3μH, COUT = 22μF fOSC = 2MHz, L = 3.3μH, COUT = 22μF
Bust Mode Transient Load Step Forced Continuous Mode from 10mA to 1A Frequency Synchronization
VOUT (AC) 20mV/DIV VOUT SYNC 200mV/DIV 2V/DIV SW 10V/DIV ILOAD 1A/DIV VOUT (AC, ZOOM IN) 20mV/DIV SYNC (ZOOM IN) SW 2V/DIV 10V/DIV SW (ZOOM IN) 10V/DIV 20μs/DIV 8619 G32 8619 G33 TOP = 10μs/DIV, BOT = 200ns/DIV VIN = 12V, VOUT = 3.3V VIN = 12V, VOUT = 3.3V, NO LOAD fOSC = 2MHz, L = 3.3μH, COUT = 22μF fOSC = 700kHz, L = 10μH, COUT = 22μF fSW (FREE RUNNING) = 700kHZ, fSYNC = 1.2MHz Rev A 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Revision History Typical Application Related Parts
