RT2805A Datasheet | Richtek

Description The RT2805A is a current mode asynchronous step-down converter that achieves excellent load and line regulation. Over a wide input voltage range from 5.5V to 36V and supports output current up to 5A. The Current mode operation provides fast transient response and eases loop stabilization. An adjustable soft-start reduces the stress on the input source at startup. In shutdown mode, the regulator draws only 25μA of supply current. The RT2805A requires a minimum number of readily available external ponents, providing a pact solution. The RT2805A provides protection functions inducing input under voltage lockout, cycle-by-cycle current limit, short circuit protection and thermal shutdown protection. The RT2805A is available in the SOP-8 (Exposed Pad) package. Ordering Information RT2805A Package Type SP : SOP-8 (Exposed Pad-Option 2) Note : Lead Plating System G : Green (Halogen Free and Pb Free) 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. Features z 5A Output Current z Wide Operating Input Range 5.5V to 36V z Adjustable Output Voltage from 1.222V to 26V z High Efficiency up to 90% z Internal pensation Minimizes External Parts Count z Internal Soft-Start z 110mΩ Internal Power MOSFET Switch z 25μA Shutdown Mode z Fixed 500k Hz Frequency z Thermal Shutdown z Cycle-by-Cycle Current Limit z Available In an SOP8 (Exposed Pad) Package z Ro HS pliant and Halogen Free Applications z Distributive Power Systems z Battery Charger z DSL Modems z Pre-regulator for Linear Regulators Marking Information RT2805A GSPYMDNN RT2805AGSP : Product Number YMDNN : Date Code Simplified Application Circuit VIN Chip Enable BOOT EN FB CBOOT L1 VOUT D1 R1 COUT R2 Copyright ©2012 Richtek Technology Corporation. All rights reserved. DS2805A-00 November 2012 is a registered trademark of Richtek Technology Corporation. .richtek....