Datasheet Linear Technology LTC3499 — Даташит

LTC3499/LTC3499B
750mA Synchronous
Step-Up DC/DC Converters
with Reverse-Battery Protection
FEATURES DESCRIPTION Reverse-Battery Protection for DC/DC Converter and Load
n High Efficiency: Up to 94%
n Generates 5V at 175mA from a 1.8V Input
n Operates from 1.8V to 5.5V Input Supply
n 2V to 6V Adjustable Output Voltage
n Inrush Current Controlled During Start-Up
n Output Disconnnect in Shutdow Low Noise 1.2MHz PWM Operatio Tiny External Components
n Automatic Burst Mode® Operation (LTC3499)
n Continuous Switching at Light Loads (LTC3499B)
n Overvoltage Protectio 8-Lead (3mm × 3mm × 0.75mm) DFN and MSOP Packages The LTC®3499/LTC3499B are synchronous, fixed frequency
step-up DC/DC power converters with integrated reverse
battery protection that protect and disconnect the devices
and load when the battery polarity is reversed while
delivering high efficiency in a small (3mm × 3mm) DFN
package. True output disconnect eliminates inrush current
and allows zero load current in shutdown. n APPLICATIONS n n Medical Equipment
Digital Cameras
MP3 Players
Handheld Instruments L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. …