Datasheet LT3959 (Analog Devices) - 21
| Manufacturer | Analog Devices |
| Description | Wide Input Voltage Range Boost/SEPIC/Inverting Converter with 6A, 40V Switch |
| Pages / Page | 26 / 21 — Typical applicaTions. 2.5V to 24V Input, 12V Output SEPIC Converter. … |
| File Format / Size | PDF / 341 Kb |
| Document Language | English |
Typical applicaTions. 2.5V to 24V Input, 12V Output SEPIC Converter. Efficiency vs Output Current
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Text Version of Document
LT3959
Typical applicaTions 2.5V to 24V Input, 12V Output SEPIC Converter
4.7µF L1A 50V D1 VOUT VIN 12V • 2.5V TO 24V C • 500mA AT V C IN = 2.5V IN OUT1 22µF 1.5A AT V 47µF IN > 8v 50V 124k V SW L1B IN 16V ×2 X5R EN/UVLO GND ×2 150k 121k LT3959 PGOOD DRIVE TIE TO SGND IF SYNC NOT USED RT 105k FBX SS VC SGND GNDK INTVCC 27.4k 7.5k 4.7µF 300kHz 15.8k 0.1µF 22nF 3959 TA03 L1A, L1B: COILTRONICS DRQ127-150 D1: VISHAY 6CWQ06FN
Efficiency vs Output Current
100 VIN = 12V 95 90 85 80 EFFICIENCY (%) 75 70 65 60 0 200 400 600 800 1000 OUTPUT CURRENT (mA) 3759 TA03b
Frequency Foldback Waveforms Load Step Response at VIN = 12V When Output Short-Circuits
VOUT V 10V/DIV OUT 500mV/DIV (AC) VSW 20V/DIV I 0.8A OUT IL1A+L1B 500mA/DIV 2.5A/DIV 0.2A 3959 TA03c 500µs/DIV 3959 TA03d 500µs/DIV 3959fa For more information www.linear.com/LT3959 21 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Related Parts
Typical applicaTions 2.5V to 24V Input, 12V Output SEPIC Converter
4.7µF L1A 50V D1 VOUT VIN 12V • 2.5V TO 24V C • 500mA AT V C IN = 2.5V IN OUT1 22µF 1.5A AT V 47µF IN > 8v 50V 124k V SW L1B IN 16V ×2 X5R EN/UVLO GND ×2 150k 121k LT3959 PGOOD DRIVE TIE TO SGND IF SYNC NOT USED RT 105k FBX SS VC SGND GNDK INTVCC 27.4k 7.5k 4.7µF 300kHz 15.8k 0.1µF 22nF 3959 TA03 L1A, L1B: COILTRONICS DRQ127-150 D1: VISHAY 6CWQ06FN
Efficiency vs Output Current
100 VIN = 12V 95 90 85 80 EFFICIENCY (%) 75 70 65 60 0 200 400 600 800 1000 OUTPUT CURRENT (mA) 3759 TA03b
Frequency Foldback Waveforms Load Step Response at VIN = 12V When Output Short-Circuits
VOUT V 10V/DIV OUT 500mV/DIV (AC) VSW 20V/DIV I 0.8A OUT IL1A+L1B 500mA/DIV 2.5A/DIV 0.2A 3959 TA03c 500µs/DIV 3959 TA03d 500µs/DIV 3959fa For more information www.linear.com/LT3959 21 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Related Parts
