Datasheet LT8335 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | Low IQ Boost/SEPIC/ Inverting Converter with 2A, 28V Switch |
| Seiten / Seite | 20 / 1 — FEATURES. DESCRIPTION. 3V to 25V Input Voltage Range. Ultralow Quiescent … |
| Dateiformat / Größe | PDF / 1.5 Mb |
| Dokumentensprache | Englisch |
FEATURES. DESCRIPTION. 3V to 25V Input Voltage Range. Ultralow Quiescent Current and Low Ripple Burst. Mode. Operation: IQ = 6µA
Modelllinie für dieses Datenblatt
Textversion des Dokuments
LT8335 Low IQ Boost/SEPIC/ Inverting Converter with 2A, 28V Switch
FEATURES DESCRIPTION
n
3V to 25V Input Voltage Range
The LT®8335 is a current mode DC/DC converter capable n
Ultralow Quiescent Current and Low Ripple Burst
of generating either positive or negative output voltages
Mode
®
Operation: IQ = 6µA
using a single feedback pin. It can be configured as a n
2A, 28V Power Switch
boost, SEPIC or inverting converter consuming as low as n
Positive or Negative Output Voltage Programming
6µA of quiescent current. Low ripple Burst Mode opera-
with a Single Feedback Pin
tion maintains high efficiency down to very low output n
Fixed 2MHz Switching Frequency
currents while keeping the output ripple below 15mV in n Programmable Undervoltage Lockout (UVLO) a typical application. The internally compensated current n Internal Compensation and Soft-Start mode architecture results in stable operation over a wide n Low Profile (0.75mm) 8-Lead (3mm × 2mm) DFN range of input and output voltages. Integrated soft-start Package and frequency foldback functions are included to control inductor current during start-up. The 2MHz operation combined with the small 8-lead DFN package, enables
APPLICATIONS
low cost, area efficient solutions. n Industrial and Automotive L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the n Telecom property of their respective owners. n Medical Diagnostic Equipment n Portable Electronics
TYPICAL APPLICATION 3V to 6V Input, 12V Boost Converter Efficiency and Power Loss
100 1000 1.2µH VIN VOUT 90 3V TO 6V 12V 4.7µF 275mA AT VIN = 3V 80 800 22µF 440mA AT V EFFICIENCY VIN SW IN = 5V POWER LOSS (mW) 520mA AT V 70 EN/UVLO GND IN = 6V 60 600 LT8335 1M 4.7pF 50 POWER LOSS FBX 40 400 V INT CC EFFICIENCY (%) 154k 30 1µF 20 V 200 IN = 3V V 10 IN = 5V 8335 TA01 VIN = 6V 0 0 0 100 200 300 400 500 600 LOAD CURRENT (mA) 8335 TA01b 8335f For more information www.linear.com/LT8335 1
FEATURES DESCRIPTION
n
3V to 25V Input Voltage Range
The LT®8335 is a current mode DC/DC converter capable n
Ultralow Quiescent Current and Low Ripple Burst
of generating either positive or negative output voltages
Mode
®
Operation: IQ = 6µA
using a single feedback pin. It can be configured as a n
2A, 28V Power Switch
boost, SEPIC or inverting converter consuming as low as n
Positive or Negative Output Voltage Programming
6µA of quiescent current. Low ripple Burst Mode opera-
with a Single Feedback Pin
tion maintains high efficiency down to very low output n
Fixed 2MHz Switching Frequency
currents while keeping the output ripple below 15mV in n Programmable Undervoltage Lockout (UVLO) a typical application. The internally compensated current n Internal Compensation and Soft-Start mode architecture results in stable operation over a wide n Low Profile (0.75mm) 8-Lead (3mm × 2mm) DFN range of input and output voltages. Integrated soft-start Package and frequency foldback functions are included to control inductor current during start-up. The 2MHz operation combined with the small 8-lead DFN package, enables
APPLICATIONS
low cost, area efficient solutions. n Industrial and Automotive L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the n Telecom property of their respective owners. n Medical Diagnostic Equipment n Portable Electronics
TYPICAL APPLICATION 3V to 6V Input, 12V Boost Converter Efficiency and Power Loss
100 1000 1.2µH VIN VOUT 90 3V TO 6V 12V 4.7µF 275mA AT VIN = 3V 80 800 22µF 440mA AT V EFFICIENCY VIN SW IN = 5V POWER LOSS (mW) 520mA AT V 70 EN/UVLO GND IN = 6V 60 600 LT8335 1M 4.7pF 50 POWER LOSS FBX 40 400 V INT CC EFFICIENCY (%) 154k 30 1µF 20 V 200 IN = 3V V 10 IN = 5V 8335 TA01 VIN = 6V 0 0 0 100 200 300 400 500 600 LOAD CURRENT (mA) 8335 TA01b 8335f For more information www.linear.com/LT8335 1