RT5789AGJ8F

RT5789A/B TM 6V, 6A, 1.5MHz ACOT Synchronous Step-Down Converter in 2.5mm x 2mm Package General Description Features 6A Converter With Built-In 18m/16m Low R DS(ON) The RT5789A/B is a simple, easy-to-use, 6A synchronous Power FETs step-down DC-DC converter with an input supply voltage Input Supply Voltage Range : 2.5V to 6V range of 2.5V to 6V. The device build-in an accurate 0.6V Output Voltage Range : 0.6V to 6V (1.5%) reference voltage and can operate in 100% duty Operates Up to 100% Duty Cycle cycle as a very low dropout voltage regulator. the TM Advanced Constant On-Time (ACOT ) Control RT5789A/B integrates low R power MOSFETs to DS(ON) Ultrafast Transient Response achieve high efficiency and is available in TSOT-23-8 (FC) No Needs For External Compensations package and UDFN-8L 2.5x2(FC) package. Optimized for Low-ESR Ceramic Output Capacitors The RT5789A/B adopts Advanced Constant On-Time 0.6V 1.5% High-Accuracy Feedback Reference TM (ACOT ) control architecture to provide an ultrafast Voltage transient response with few external components and to 35A Operation Quiescent Current (RT5789A) operate in nearly constant switching frequency over the Robust Over-Current Protection for Both FETs line, load, and output voltage range. The RT5789A/B is Optional for Operation Modes : designed to operate at 1.5MHz fixed frequency. While Power Saving Mode (PSM) (RT5789A) the RT5789A automatically enters power saving mode Forced PWM Mode (RT5789B) (PSM) operation at light load to maintain high efficiency. Fixed Switching Frequency : 1.5MHz RT5789B operates in Forced PWM over the loading range, Monotonic Start-Up for Pre-Biased Output that helps meet tight voltage regulation accuracy Individual Enable Control Input requirements. Power Good Indicator The RT5789A/B senses both FETs current for a robust Built-In Internally Fixed Soft-Start (Typ. 1.5ms) over-current protection. It prevents the device from the 100% Duty Cycle Mode catastrophic damage in output short circuit, over current Internal Output Discharge or inductor saturation. The individual enable control input Input Under-Voltage Lockout (UVLO) and power good indicator provides flexible system power Output Under-Voltage Protection (UVP) with Hiccup sequence control a built-in soft-start function prevents Mode inrush current during start-up. The device also includes Over-Temperature Protection input under-voltage lockout, output under-voltage Available in TSOT-23-8 (FC) Package and UDFN-8L protection, and over-temperature protection (thermal 2.5x2 (FC) Package shutdown) to provide safe and smooth operation in all operating conditions. Simplified Application Circuit L V IN VIN LX V OUT C IN R PGOOD RT5789A/B R1 C OUT FB PGOOD PGOOD R2 EN Enable VOUT PGND AGND Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS5789A/B-01 October 2017 www.richtek.com 1RT5789A/B Ordering Information Pin Configuration (TOP VIEW) RT5789A/B Package Type J8F : TSOT-23-8 (FC) QUF: UDFN-8L 2.5x2 (FC) (U-Type) 8 7 6 5 Lead Plating System G : Green (Halogen Free and Pb Free) 2 34 PWM Operation Mode A : Automatic PSM B : Forced PWM Note : Richtek products are : TSOT-23-8 (FC) RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. 8 EN 1 PGOOD Suitable for use in SnPb or Pb-free soldering processes. FB 2 7 VIN 3 6 AGND LX 4 5 VOUT PGND Applications UDFN-8L 2.5x2 (FC) WLAN ASIC Power / Storage (SSD and HDD) Mobile Phones and Handheld Devices STB, Cable Modem, and xDSL Platforms General Purpose for POL LV Buck Converter Marking Information RT5789AGJ8F RT5789AGQUF 01= : Product Code 16= : Product Code 01=W 16=DNN W : Date Code DNN : Date Code RT5789BGQUF RT5789BGJ8F 00= : Product Code 15= : Product Code 00=W W : Date Code 15=DNN DNN : Date Code Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS5789A/B-01 October 2017 2 EN PGOOD VIN FB LX AGND PGND VOUT