Datasheet LT8650S (Analog Devices) - 8

LT8650S
TYPICAL PERFORMANCE CHARACTERISTICS Transient Response External Compensation Forced Continuous Mode (FCM) Burst Mode Operation
ILOAD 2A/DIV SW SW 5V/DIV 5V/DIV VOUT 100mV/DIV IL IL 1A/DIV 1A/DIV 20µs/DIV 8650S G35 2µs/DIV 8650S G36 2µs/DIV 8650S G37 40mA TO 2A TRANSIENT 12VIN TO 5VOUT AT 100mA 12VIN TO 5VOUT AT 100mA 3.3VOUT SYNC = FLOAT SYNC = 0V COUT = 47µF ×2 FCM, fSW = 2MHz CC = 220pF, RC = 14kΩ
CH1, CH2, and CLKOUT Switch Rising Edge Start-Up Dropout Performance
FCM SW1 (SYNC FLOAT) 10V/DIV VIN 2V/DIV SW2 10V/DIV VSW 2V/DIV VOUT CLKOUT 2V/DIV 2V/DIV 500ns/DIV 8650S G38 1ns/DIV 8650S G40 100ms/DIV 8650S G40 VIN = 12V 5Ω LOAD CH1 = 5VOUT (1A IN REGULATION) CH2 = 3.3VOUT SYNC = FLOAT
Start-Up Dropout Performance Case Temperature Rise Case Temperature Rise
120 100 Burst Mode OPERATION DC2407A DEMO BOARD 110 24VIN, LOAD2 = LOAD1 (SYNC = 0V) 12V 90 IN, LOAD2 = LOAD1 VIN1,2 = 12V, fSW = 2MHz 100 12VIN, LOAD2 = 4A 80 VOUT1 = 5V, VOUT2 = 3.3V V 12V IN 90 IN, LOAD2 = 0A 2V/DIV 70 80 70 60 V TURE RISE (°C) TURE RISE (°C) OUT 60 50 2V/DIV 50 40 40 30 30 CASE TEMPERA 20 CASE TEMPERA 100ms/DIV 8650S G41 20 10 5Ω LOAD 10 (1A IN REGULATION) 0 0 0 1 2 3 4 5 6 0 0.2 0.4 0.6 0.8 1 LOAD1 CURRENT (A) DUTY CYCLE OF PULSED LOAD 8650S G42 8650S G43 DC2407A DEMO BOARD CH1 = 0.5A STANDBY, 6A PULSED; CH2 = 0A DC VOUT1 = 5V, VOUT2 = 3.3V, fSW = 2MHz CH1 = 0.5A STANDBY, 6A PULSED; CH2 = 4A DC CH1 = CH2 = 2A STANDBY, 6A PULSED Rev A 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts