Datasheet LT8210 (Analog Devices) - 8

link to page 41 link to page 41 link to page 41 link to page 38 link to page 38 link to page 38 link to page 38 link to page 38 link to page 39 LT8210
TYPICAL PERFORMANCE CHARACTERISTICS Maximum Inductor Current: Maximum Inductor Current: Maximum Inductor Current: fSW = fSW(Optimal) fSW = 0.7 × fSW(Optimal) fSW = 1.3 × fSW(Optimal) (Figure 39) (Figure 39) (Figure 39) SW SW(OPTIMAL) Figure 39
8 144 8 144 8 144 BOOST BUCK BOOST BUCK REGION REGION 7 126 7 BOOST 126 7 REGION REGION 126 NORMALIZED CURRENT (%) REGION NORMALIZED CURRENT (%) NORMALIZED CURRENT (%) 6 108 6 BUCK 108 6 108 REGION 5 90 5 90 5 90 4 BB 72 4 72 4 72 REGION BB CURRENT (A) 3 54 CURRENT (A) 3 BB 54 CURRENT (A) 3 54 REGION REGION 2 IL PEAK 36 2 I 36 2 I 36 L PEAK I L PEAK L AVERAGE I IL AVERAGE 1 I L AVERAGE L VALLEY 18 1 I 18 1 18 L VALLEY IL VALLEY VOUT = 24V MAXIMUM IOUT V MAXIMUM IOUT VOUT = 24V MAXIMUM IOUT 0 0 OUT = 24V 0 0 0 0 6 12 18 24 30 36 42 48 6 12 18 24 30 36 42 48 6 12 18 24 30 36 42 48 INPUT VOLTAGE (V) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 8210 G10 8210 G11 8210 G12
Pre-Biased Output Start-Up Static Reverse Input Protection Start-Up (CCM Mode – Figure 36) (CCM Mode – Figure 36) (Figure 36)
DG DG 10V/DIV 10V/DIV DG VOUT = 12V V 10V/DIV OUT = 12V V V OUT OUT 5V/DIV 5V/DIV VOUT = 6V V VIN FROM 0V TO –14V IN 10V/DIV I I L IOUT = 3A L 5A/DIV V 5A/DIV INP 1V/DIV I PWGD V PWGD IN IN = 12V VIN = 12V 3V/DIV 1A/DIV 3V/DIV 400µs/DIV 8210 G13 400µs/DIV 8210 G14 2ms/DIV 8210 G15
Dynamic Reverse Input Protection Transition to Current Regulation Inductor Current at Light Load (Figure 36) (Figure 36) (Figure 37)
VOUT = 12V V DG IOUT IN = 48V; IOUT = 250mA IOUT = 1A 10V/DIV 10A/DIV IL (CCM) V 1A/DIV IN IL 10V/DIV VIN FROM 10V TO –6V 10A/DIV IL (DCM) V 1A/DIV INP IMON 10V/DIV 500mV/DIV IL (Burst) 2A/DIV V V OUT OUT 10V/DIV 5V/DIV IL (PASS– CCM MODE THRU) 1A/DIV 4ms/DIV 8210 G16 4ms/DIV 8210 G17 20µs/DIV 8210 G18 Rev. A 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Revision History Typical Application Related Parts