Datasheet LTC3855 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | Dual, Multiphase Synchronous DC/DC Controller with Differential Remote Sense |
| Pages / Page | 44 / 6 — Load Step. (Burst Mode Operation). (Forced Continuous Mode). … |
| File Format / Size | PDF / 2.2 Mb |
| Document Language | English |
Load Step. (Burst Mode Operation). (Forced Continuous Mode). (Pulse-Skipping Mode). Inductor Current at Light Load
Model Line for this Datasheet
Text Version of Document
LTC3855 Typical perForMance characTerisTics
Load Step Load Step (Burst Mode Operation) (Forced Continuous Mode)
I I LOAD LOAD 5A/DIV 5A/DIV 300mA TO 5A 300mA TO 5A IL IL 5A/DIV 5A/DIV VOUT VOUT 100mV/DIV 100mV/DIV AC-COUPLED AC-COUPLED 50µs/DIV 3855 G01 50µs/DIV 3855 G02 VIN = 12V VIN = 12V VOUT = 1.8V VOUT = 1.8V
Load Step (Pulse-Skipping Mode) Inductor Current at Light Load
ILOAD 5A/DIV FORCED 300mA TO 5A CONTINUOUS MODE 5A/DIV IL 5A/DIV Burst Mode OPERATION VOUT 5A/DIV 100mV/DIV PULSE-SKIPPING AC-COUPLED MODE 5A/DIV 50µs/DIV 3855 G03 1µs/DIV 3855 G04 VIN = 12V VIN = 12V VOUT = 1.8V VOUT = 1.8V ILOAD = 400mA
Prebiased Output at 2V Coincident Tracking
VOUT RUN 2V/DIV 2V/DIV VOUT1 VFB 500mV/DIV VOUT1 VOUT2 TK/SS VOUT2 500mV/DIV 1V/DIV 2ms/DIV 3855 G05 5ms/DIV 3855 G06 VIN = 12V V V OUT1 = 1.8V, 1.5Ω LOAD OUT = 3.3V VOUT2 = 1.2V, 1Ω LOAD 3855f Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Related Parts
Load Step Load Step (Burst Mode Operation) (Forced Continuous Mode)
I I LOAD LOAD 5A/DIV 5A/DIV 300mA TO 5A 300mA TO 5A IL IL 5A/DIV 5A/DIV VOUT VOUT 100mV/DIV 100mV/DIV AC-COUPLED AC-COUPLED 50µs/DIV 3855 G01 50µs/DIV 3855 G02 VIN = 12V VIN = 12V VOUT = 1.8V VOUT = 1.8V
Load Step (Pulse-Skipping Mode) Inductor Current at Light Load
ILOAD 5A/DIV FORCED 300mA TO 5A CONTINUOUS MODE 5A/DIV IL 5A/DIV Burst Mode OPERATION VOUT 5A/DIV 100mV/DIV PULSE-SKIPPING AC-COUPLED MODE 5A/DIV 50µs/DIV 3855 G03 1µs/DIV 3855 G04 VIN = 12V VIN = 12V VOUT = 1.8V VOUT = 1.8V ILOAD = 400mA
Prebiased Output at 2V Coincident Tracking
VOUT RUN 2V/DIV 2V/DIV VOUT1 VFB 500mV/DIV VOUT1 VOUT2 TK/SS VOUT2 500mV/DIV 1V/DIV 2ms/DIV 3855 G05 5ms/DIV 3855 G06 VIN = 12V V V OUT1 = 1.8V, 1.5Ω LOAD OUT = 3.3V VOUT2 = 1.2V, 1Ω LOAD 3855f Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Related Parts
