BD8924G-GTR ROHM

1/4 Structure Silicon monolithic integrated circuit Product name Boost DCDC converter for TV tuner Type B8924G Package outline Fig. 1 Block Diagram Fig. 2 Features 1) For varactor voltage in the TV tuner. 2) Over current Protection circuit 3) SSOP-5 small size This chip is not designed to protect itself against radioactive rays. Absolute maximum ratingsTa=25 Parameter Symbol Ratings Unit Condition Maximum applied voltage1 Vmax1 7.0 V It applies to VIN terminal Maximum applied voltage 2 Vmax2 36 V It applies to SW, VOUT terminals Power dissipation Pd1 674.9 (Note1) mW At single unit o Operating temperature range Topr -30 +85 C o Storage temperature range Tstr -55 +150 C (Note1) Pd derated at 5.4mW/ for temperature above Ta=25, mounted on 70mm70mm1.6mm glass-epoxy PCB. Operation conditionTa=25 Parameter Symbol Ratings Unit Condition Power supply voltage range VCC 4.55.5 V VIN terminal voltage REV. A 2/4 LOT NO. Fig. 1 Package outline Fig. 1 Package Outline Pin assigns NO. Pin Name I/O Function 1 SW I Inductor connection terminal 2 GND - GND 3 VOUT O Boost voltage output 4 GND - GND 5 VIN - Power supply input VIN SW VOUT OPEN PROTECT PWM comp. S - Control - Q1 QR + + Current + ERRAMP Sense OSC GND Fig. 2 Block Diagram REV. A D 0