RT8105A
RT8105A is 5V/12V Synchronous Buck PWM DC/DC Controller manufactured by Richtek.
5V/12V Synchronous Buck PWM DC/DC Controller
General Description
The RT8105A is a synchronous buck PWM controller with embedded MOSFET gate drivers. This part operates with 5V/12V supply voltage, has fixed 300k Hz switching frequency, and utilizes voltage mode control. The feedback control loop is pensated internally to simplify the converter design.
The RT8105A provides enable/disable function to support power sequence control. This device also provides full fault protection functions to protect the load. This part uses lossless low side MOSFET RDS(ON) current sense technique for over current protection with adjustable threshold. Other Features include internal soft-start and VIN detection function.
Ordering Information
Package Type S : SOP-8 Lead Plating System G : Green (Halogen Free and Pb Free) Z : ECO (Ecological Element with
Halogen Free and Pb free)
Note : Richtek products are :
` Ro HS pliant and patible with the current requirements of IPC/JEDEC J-STD-020.
` Suitable for use in Sn Pb or Pb-free soldering processes.
Marking Information
RT8105AGS
RT8105AGS : Product Number
RT8105A GSYMDNN
YMDNN : Date Code
Features z 5V or 12V Supply Voltage z Embedded Non-Overlapping N-MOSFET Driver z 300k Hz Fixed Switching Frequency z Internal Control Loop pensation z Enable/Disable Control z Full 0 to 100% Duty Ratio z Low Side MOSFET RDS(ON) Current Sense z Adjustable Over Current Protection with Improved
Noise Immunity z Full-Time Over Voltage Protection z Fast Transient Response z Internal Soft-Start z Ro HS pliant and Halogen Free
Applications z Graphic Card z Motherboard z IA Equipment z Telem Equipment z Mid-Power DC/DC Regulator
Pin Configurations
(TOP VIEW)
BOOT UGATE 2
GND 3 LGATE 4
PHASE
SOP-8
RT8105AZS
RT8105A ZSYMDNN
RT8105AZS : Product Number YMDNN : Date Code
DS8105A-02 April 2011
.richtek. 1
Typical Application...
