RTQ2522AGQW(2) Richtek

RTQ2522A/B 2A Ultra-Low Dropout Voltage LDO Regulators with Soft-Start General Description Features Ultralow V Range : 0.8V to 5.5V IN The RTQ2522A/B is a very low dropout linear regulator VBIAS Voltage Range : 2.7V to 5.5V which operates from input voltage as low as 0.8V. The VOUT Voltage Range : 0.8V to 3.6V device is capable of supplying 2A of output current with a Low Dropout : 135mV Typ at 2A, V = 5V BIAS typical dropout voltage of only 135mV. A VBIAS supply is 2% Accuracy Over Line/Load/ Temperature required to run the internal reference and LDO circuitry PGOOD Indicator for Easy Sequence Control while output current comes directly from the VIN supply Programmable Soft-Start Provides Linear Voltage for high efficiency regulation. User-programmable soft-start Startup limits the input inrush current and minimizes stress on Stable with Any Output Capacitor 2.2F the input power. The enable input and power good output Over-Current and Over-Temperature Protection allow easy sequencing with external regulators. This complete flexibility provides an easy-to-use robust power management solution for a wide variety of applications. Ordering Information The RTQ2522A/B is stable with output capacitor greater RTQ2522A/B than or equal to 2.2F. A precise reference and error Pin 1 Orientation*** amplifier deliver 2% accuracy over load, line and (2) : Quadrant 2, Follow EIA-481-D temperature. Over-current limit and over-temperature Package Type protection are also included. The RTQ2522A/B is available QW : WDFN-10L 3x3 (W-Type) QW : WQFN-20L 5x5 (W-Type) in the WDFN-10L 3x3 and WQFN-20L 5x5 packages. Lead Plating System G : Green (Halogen Free and Pb Free) Applications A : WDFN-10L 3x3 PCs, Servers, Modems, and Set-Top-Boxes B : WQFN-20L 5x5 FPGA Applications Note : DSP Core and I/O Voltages ***Empty means Pin1 orientation is Quadrant 1 Instrumentation Richtek products are : Post-Regulation Applications RoHS compliant and compatible with the current require- Applications With Sequencing Requirements ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. Simplified Application Circuit RTQ2522A/B V VIN PGOOD IN R C PGOOD IN EN VOUT V OUT V C BIAS VBIAS OUT R1 C BIAS FB SS R2 C SS GND Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DSQ2522A/B-00 April 2017 www.richtek.com 1RTQ2522A/B Pin Configuration (TOP VIEW) 20 19 18 17 16 VOUT 1 15 SS NC 2 14 NC VIN 1 10 VOUT 9 VIN 2 VOUT 3 13 NC GND NC 3 PGOOD 8 FB 4 7 4 12 VBIAS SS NC GND 5 11 6 GND EN 5 11 VIN EN 21 6 78 9 10 WDFN-10L 3x3 WQFN-20L 5x5 Marking Information RTQ2522AGQW RTQ2522BGQW KK= : Product Code RTQ2522BGQW : Product Number YMDNN : Date Code RTQ2522B YMDNN : Date Code KK=YM GQW DNN YMDNN Functional Pin Description Pin No. Pin Name Pin Function WDFN-10L 3x3 WQFN-20L 5x5 1, 2 5, 6, 7, 8 VIN Power input of the device. Regulated output voltage. A minimum of 2.2F capacitor 9, 10 1, 18, 19, 20 VOUT should be placed directly at this pin. Power good indicator. An open-drain, active-high output that indicates the status of VOUT. A pull-up resistor from 10k to 3 9 PGOOD 1M should be connected from this pin to a supply of up to 5.5V. Bias input pin. Providing input voltage for internal control 4 10 VBIAS circuitry. Chip enable (Active-High). Pulling this pin below 0.4V turns 5 11 EN the regulator off, reducing the quiescent current to a fraction of its operating value. Connect to VIN if not being used. 6, 12, Ground. The Exposed Pad must be soldered to a large PCB GND 11 (Exposed Pad) 21 (Exposed Pad) and connected to GND for maximum power dissipation. Connect a capacitor between this pin and the ground to set 7 15 SS the soft-start ramp time of the output voltage. Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DSQ2522A/B-00 April 2017 2 GND VIN VOUT VIN VOUT VIN VOUT PGOOD NC VBIAS FB