XRP7740 XRP7740 Quad Channel Digital PWM Step Down Controller Quad Channel Digital PWM Step Down Controller February 2020 Rev. 1.3.0 GENERAL DESCRIPTION APPLICATIONS The XRP7740 is a quad-output pulse-width Multi Channel Programmable modulated (PWM) step-down DC-DC controller Power Supplies with a built-in LDO for standby power and Audio-Video Equipment GPIOs. The device provides a complete power Industrial & Telecom Equipment management solution in one IC and is fully 2 Processors & DSPs Based Equipment programmable via an IC serial interface. Independent Digital Pulse Width Modulator FEATURES (DPWM) channels regulate output voltages and provide all required protection functions 4 Channel Step Down Controller such as current limiting and over-voltage 3ohm/1.8ohm driver protection. Programmable Output Voltage Each output voltage can be programmed from 0.9V to 5.1V 0.9V to 5.1V without the need of an external Programmable 1.5MHz DPWM Frequency voltage divider. The wide range of the 6.5V-20V Single Input Voltage Range programmable DPWM switching frequency (from 300 KHz to 1.5 MHz) enables the user to Up to 6 Reconfigurable GPIO Pins optimize between efficiency and component 2 Fully Programmable via I C Interface size. Input voltage range is from 6.5V to 20V. Independent Digital Pulse Width 2 An I C bus interface is provided to program Modulator (DPWM) channels the IC as well as to communicate with the host Complete Monitoring and Reporting for fault reporting and handling, power rail parameters monitoring, etc. Complete Power Up/Down Sequencing Full On Board Protection The device offers a complete solution for soft- OTP, UVLO, OCP and OVP start and soft-stop. The start-up delay and ramp of each PWM regulator can be Built-in 3.3V/5V LDO independently controlled. The device can start PowerArchitect Design Software up a pre-biased PWM channel without causing Green/Halogen Free 40-pin TQFN large negative inductor current. TYPICAL APPLICATION DIAGRAM Fig. 1: XRP7740 Application Diagram 1/30 Rev. 1.3.0 XRP7740 XRP7740 Quad Channel Digital PWM Step Down Controller Quad Channel Digital PWM Step Down Controller ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS These are stress ratings only and functional operation of Operating Input Voltage VINX ........................ 6.5V to 20V the device at these ratings or any other above those Junction Temperature Range .................... -40C to 125C indicated in the operation sections of the specifications Thermal Resistance ....................................24.3C/W JA below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. VCCA, VCCD, LDOOUT, GLx, VOUTx ............................ 6V AVDD, DVDD ........................................................ 2.0V VIN1, VIN2 ............................................................ 22V LXx .............................................................. -1V to 22V Logic Inputs ............................................................. 6V BSTx, GHx .................................................... VLXx + 5V Storage Temperature .............................. -65C to 150C Lead Temperature (Soldering, 10 sec) ................... 300C ELECTRICAL SPECIFICATIONS Specifications with standard type are for an Operating Junction Temperature of T = 25C only limits applying over the full J Operating Junction Temperature range are denoted by a . Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25C, and are provided for reference purposes only. Unless otherwise indicated, VIN = 6.5V to 20V, VIN = 6.5V to 20V, Enable=HIGH, 1 2 C = C = 1nF. GL GH Quiescent Current Parameter Min. Typ. Max. Units Conditions LDOOUT enabled (no load) No switching converter channels enabled VIN Supply Current in STANDBY 9 mA 2 I C communication active Switching frequency = 400kHz VIN Supply Current in 180 A EN = 0V, VIN1 = VIN2 = 12V SHUTDOWN 4 channels running, VIN Supply Current 28 mA GH and GH = 1nF load each VIN=12V, Switching frequency = 300kHz 4 channels running, VIN Supply Current 50 mA GH and GH = 1nF load each VIN=12V, Switching frequency = 1MHz Step Down Controllers Parameter Min. Typ. Max. Units Conditions 20 mV 0.9V VOUT 2.5V -20 VOUT Regulation Accuracy 40 mV 2.6V VOUT 5.1V -40 1 VOUT regulation range 0.9 5.1 Programmable range of each channel VOUT set point resolution 50 0.9V VOUT 2.5V VOUT set point resolution 100 2.6V VOUT 5.1V VOUT Input Current 1 A 0.9V < VOUT 2.5V VOUT Input Resistance 120 k 2.6V VOUT 5.1V Note 1: Voltages above 5.1V can be obtained by using an external voltage divider. 2/30 Rev. 1.3.0