Datasheet LT8650S-1 (Analog Devices) - 8
| 制造商 | Analog Devices |
| 描述 | Dual Channel 4A, 42V, Synchronous Step-Down Silent Switcher 2 with 6.2µA Quiescent Current |
| 页数 / 页 | 32 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS. Transient Response External. … |
| 文件格式/大小 | PDF / 1.5 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Transient Response External. Compensation. Forced Continuous Mode (FCM)
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LT8650S-1
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 8650s1 G35 2µs/DIV 8650s1 G36 2µs/DIV 8650s1 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 8650s1 G40 500ns/DIV 8650s1 G38 1ns/DIV 100ms/DIV 8650s1 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 VIN 90 12VIN, 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 20 100ms/DIV 8650s1 G41 CASE TEMPERA 20 CASE TEMPERA 5Ω LOAD 10 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 8650s1 G42 8650s1 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 0 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 Typical Application Related Parts
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 8650s1 G35 2µs/DIV 8650s1 G36 2µs/DIV 8650s1 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 8650s1 G40 500ns/DIV 8650s1 G38 1ns/DIV 100ms/DIV 8650s1 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 VIN 90 12VIN, 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 20 100ms/DIV 8650s1 G41 CASE TEMPERA 20 CASE TEMPERA 5Ω LOAD 10 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 8650s1 G42 8650s1 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 0 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 Typical Application Related Parts