Datasheet LT3844 (Analog Devices) - 22
| Manufacturer | Analog Devices |
| Description | High Voltage, Current Mode Switching Regulator Controller with Programmable Operating Frequency |
| Pages / Page | 26 / 22 — Typical applicaTions. All Ceramic Capacitor Application, 24V to 3.3V at … |
| File Format / Size | PDF / 292 Kb |
| Document Language | English |
Typical applicaTions. All Ceramic Capacitor Application, 24V to 3.3V at 5A, fSW = 250kHz
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LT3844
Typical applicaTions All Ceramic Capacitor Application, 24V to 3.3V at 5A, fSW = 250kHz
VIN 24V CIN C5 (VOLTAGE 22µF R3 1 16 0.22µF TRANSIENTS ×3 1M VIN BOOST UP TO 60V) 2 15 SHDN TG M1 C1 2200pF 3 14 CSS SW 4 13 L1 R BURST_EN V D2 SENSE CC 6.8µH 0.01Ω V IN4148 OUT C4 LT3844 3.3V 5 12 2.2µF VFB PGND 5A R1 D1 6 C 11 OUT 3.32k VC SENSE+ 100µF R4 ×2 7 10k 10 SYNC SENSE– C2 C3 R2 680pF 100pF 8 9 5.62k f 3844 TA02 SET SGND L1 = VISHAY, IHLP5050FD-01 R5 M1 = VISHAY, SI7852DP 63.4k D1 = DIODES INC, PDS760 COUT = TDK, C4532X5R0J107K CIN = TDK, C4532X7R2A225K
8V to 20V to 8V, 25W SEPIC Application
VIN 12V C C5 IN1 CIN2 22µF • 22µF 1µF R4 1 16 25V 1M V L1 25V IN BOOST 25V ×3 ×3 D2 V 2 OUT 15 SHDN TG 8V C1 25W 3300pF 3 14 C M1 SS SW 4 13 BURST_EN VCC C4 R6 LT3844 1µF + 5 12 10Ω COUT1 COUT2 V L1 330µF 22µF FB PGND 25V 16V 25V • 6 11 R V SENSE C SENSE+ 56pF 0.01Ω R5 7 40.2k 10 SYNC SENSE– R1 R2 10k R7 C2 C3 8 9 54.9k fSET SGND 10Ω 3844 TA03 100pF 680pF R3 49.9k L1 = COILTRONICS, VERSAPAC VP5-0083 CIN, C5, COUT2 = TDK, C4532X7R1E226M D2 = ONSEMI, MBRD660 COUT = SANYO OS-CON, 16SVP330M CIN = VISHAY, Si7852DP 3844fc 22 For more information www.linear.com/LT3844 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
Typical applicaTions All Ceramic Capacitor Application, 24V to 3.3V at 5A, fSW = 250kHz
VIN 24V CIN C5 (VOLTAGE 22µF R3 1 16 0.22µF TRANSIENTS ×3 1M VIN BOOST UP TO 60V) 2 15 SHDN TG M1 C1 2200pF 3 14 CSS SW 4 13 L1 R BURST_EN V D2 SENSE CC 6.8µH 0.01Ω V IN4148 OUT C4 LT3844 3.3V 5 12 2.2µF VFB PGND 5A R1 D1 6 C 11 OUT 3.32k VC SENSE+ 100µF R4 ×2 7 10k 10 SYNC SENSE– C2 C3 R2 680pF 100pF 8 9 5.62k f 3844 TA02 SET SGND L1 = VISHAY, IHLP5050FD-01 R5 M1 = VISHAY, SI7852DP 63.4k D1 = DIODES INC, PDS760 COUT = TDK, C4532X5R0J107K CIN = TDK, C4532X7R2A225K
8V to 20V to 8V, 25W SEPIC Application
VIN 12V C C5 IN1 CIN2 22µF • 22µF 1µF R4 1 16 25V 1M V L1 25V IN BOOST 25V ×3 ×3 D2 V 2 OUT 15 SHDN TG 8V C1 25W 3300pF 3 14 C M1 SS SW 4 13 BURST_EN VCC C4 R6 LT3844 1µF + 5 12 10Ω COUT1 COUT2 V L1 330µF 22µF FB PGND 25V 16V 25V • 6 11 R V SENSE C SENSE+ 56pF 0.01Ω R5 7 40.2k 10 SYNC SENSE– R1 R2 10k R7 C2 C3 8 9 54.9k fSET SGND 10Ω 3844 TA03 100pF 680pF R3 49.9k L1 = COILTRONICS, VERSAPAC VP5-0083 CIN, C5, COUT2 = TDK, C4532X7R1E226M D2 = ONSEMI, MBRD660 COUT = SANYO OS-CON, 16SVP330M CIN = VISHAY, Si7852DP 3844fc 22 For more information www.linear.com/LT3844 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
