Datasheet LTC3870-1 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | PolyPhase Step-Down Slave Controller for Digital Power System Management |
| Pages / Page | 20 / 5 — Typical perForMance characTerisTics. Start-Up into a Pre-Biased Load. … |
| File Format / Size | PDF / 1.1 Mb |
| Document Language | English |
Typical perForMance characTerisTics. Start-Up into a Pre-Biased Load. 2-Phase Operation LTC3887-1. Current Sense Threshold
Model Line for this Datasheet
Text Version of Document
LTC3870-1
Typical perForMance characTerisTics Start-Up into a Pre-Biased Load 2-Phase Operation LTC3887-1 Current Sense Threshold and LTC3870-1 vs ITH Voltage
80 RANGE HIGH RUN RANGE LOW ALL RUN PINS 60 TIED TOGETHER 2V/DIV 40 V (mV) OUT 20 LTC3870–1 IN DCM V ISENSE 500mV/DIV VIN = 12V 0 VOUT = 1.8V 2ms/DIV 38701 G07 –20 –40 0 0.5 1 1.5 2 2.5 VITH (V) 38701 G08
DC Output Current Matching in a 4-Phase Operation INTVCC Line Regulation LTC3887-1 and LTC3870-1
6.0 30 5.0 25 4.0 20 TAGE (V) 3.0 15 VOL V CC 2.0 INT 10 CHANNEL CURRENT (A) LTC3887–1 CH0 1.0 5 LTC3887–1 CH1 LTC3870–1 CH0 0 LTC3870–1 CH1 0 0 10 20 30 40 50 60 0 10 20 30 40 50 60 70 80 90 100 INPUT VOLTAGE (V) TOTAL OUTPUT CURRENT (A) 38701 G09 38701 G10
Dynamic Current Sharing During a Load Transient in a 4-Phase System Quiescent Current vs Input LTC3887-1 and LTC3870-1 Voltage without EXTVCC
3.5 LTC3887–1 CH0 3.0 10A/DIV 2.5 LTC3887–1 CH1 10A/DIV 2.0 LTC3870–1 CH0 10A/DIV 1.5 Y CURRENT (mA) LTC3870–1 CH1 10A/DIV 1.0 SUPPL 50µs/DIV 38701 G11 0.5 VIN = 12V VOUT = 1.0V 0 ILOAD = 0A TO 32A TO 0A 0 10 20 30 40 50 60 INPUT VOLTAGE (V) 38701 G12 38701f For more information www.linear.com/LTC3870-1 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
Typical perForMance characTerisTics Start-Up into a Pre-Biased Load 2-Phase Operation LTC3887-1 Current Sense Threshold and LTC3870-1 vs ITH Voltage
80 RANGE HIGH RUN RANGE LOW ALL RUN PINS 60 TIED TOGETHER 2V/DIV 40 V (mV) OUT 20 LTC3870–1 IN DCM V ISENSE 500mV/DIV VIN = 12V 0 VOUT = 1.8V 2ms/DIV 38701 G07 –20 –40 0 0.5 1 1.5 2 2.5 VITH (V) 38701 G08
DC Output Current Matching in a 4-Phase Operation INTVCC Line Regulation LTC3887-1 and LTC3870-1
6.0 30 5.0 25 4.0 20 TAGE (V) 3.0 15 VOL V CC 2.0 INT 10 CHANNEL CURRENT (A) LTC3887–1 CH0 1.0 5 LTC3887–1 CH1 LTC3870–1 CH0 0 LTC3870–1 CH1 0 0 10 20 30 40 50 60 0 10 20 30 40 50 60 70 80 90 100 INPUT VOLTAGE (V) TOTAL OUTPUT CURRENT (A) 38701 G09 38701 G10
Dynamic Current Sharing During a Load Transient in a 4-Phase System Quiescent Current vs Input LTC3887-1 and LTC3870-1 Voltage without EXTVCC
3.5 LTC3887–1 CH0 3.0 10A/DIV 2.5 LTC3887–1 CH1 10A/DIV 2.0 LTC3870–1 CH0 10A/DIV 1.5 Y CURRENT (mA) LTC3870–1 CH1 10A/DIV 1.0 SUPPL 50µs/DIV 38701 G11 0.5 VIN = 12V VOUT = 1.0V 0 ILOAD = 0A TO 32A TO 0A 0 10 20 30 40 50 60 INPUT VOLTAGE (V) 38701 G12 38701f For more information www.linear.com/LTC3870-1 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
