XRP7704 Quad-Output Digital PWM Buck Controller June 2018 REV 1.1.1 KEY FEATURES GENERAL DESCRIPTION The XRP7704 is a quad-output pulse-width modulated Four switching buck (step-down) controllers each with (PWM) step-down DC-DC controller with a built-in LDO for internal FET drivers standby power and GPIOs. The device provides a complete 6.5V to 20V input voltage range no additional voltage power management solution in one IC and is fully rails required 2 programmable via the included IC serial interface. Output voltages programmable from 0.9V to 5.1V Independent Digital Pulse Width Modulator (DPWM) Up to 6 reconfigurable GPIO pins channels regulate output voltages and provide all required 2 Fully programmable via I C interface protection functions such as current limiting and over- voltage protection. Independent Digital Pulse Width Modulator (DPWM) Each output voltage can be programmed from 0.9V to 5.1V channels with five coefficient PID control without the need of an external voltage divider. The wide High Integration: elimination of external circuits and range of the programmable DPWM switching frequency components required for compensation, parameter (from 300 KHz to 1.5 MHz) enables the user to optimize adjustment and interface between efficiency and component size. Input voltage Programmable DPWM frequency range (300kHz to 1.5 range is from 6.5V to 20V. MHz) enables efficiency and component size 2 I C bus interface is provided to program the IC as well as to optimization communicate with the host for fault reporting and handling, Complete power monitoring and reporting power rail parameters monitoring, etc. The device offers a complete solution for soft-start and soft- Independently controlled start-up delay and ramp for stop. The start-up delay and ramp of each PWM regulator each regulator, including soft start with a pre-biased can be independently controlled. The device can start up a load voltage pre-biased PWM channel without causing large negative Independently controlled soft-stop delay and ramp for inductor current. each regulator with a programmable stop voltage Over-temperature protection (OTP) and Under Voltage APPLICATIONS Lockout (UVLO) per-channel over-current protection Computing: Servers, Storage Systems (OCP) and over-voltage protection (OVP) Consumer: Set-top box (STB), Game Systems Built-in LDO (configurable to 3.3V or 5V) with over- Industrial: ATE, DC-DC converters, Video Processing current protection Plasma Display Panel (PDP) Non-volatile memory for system configuration Networking and Telecommunications Equipment Configuration development tools 1 XRP7704 REV 1.1.1 Quad-Output Digital PWM Buck Controller ABSOLUTE MAXIMUM RATINGS VIN1, VIN2..... 22V These are stress ratings only and functional operation of the LXx... -1V to 22V device at these ratings or any other above those indicated in Logic Inputs............ 6V the operation sections of the specifications below is not BSTx, GHx.. 27V implied. Exposure to absolute maximum rating conditions for Storage Temperature... -65C to 150 C extended periods of time may affect reliability. Thermal Resistance... 18C/W Lead Temperature (Soldering, 10 sec)..300 C VCCA, VCCD, LDOOUT, GLx, VOUTx...6V AVDD, DVDD....2.0V ELECTRICAL SPECIFICATIONS Unless otherwise specified: TA = TJ = 25C, 6.5 VIN1 20V, 6.5 VIN2 20V, ENABLE = HIGH, CGL= CGH = 1nF. Those specifications denoted by a are guaranteed over the full operating temperature range, -40 C < TJ < 125 C. QUIESCENT CURRENT PARAMETER MIN TYP MAX UNITS CONDITIONS LDOOUT enabled (no load) No switching converter channels VIN Supply Current in 9 mA enabled STANDBY I2C Communication Active Switching Frequency = 400kHz VIN Supply Current in EN = 0V 180 A SHUTDOWN VIN1 = VIN2 = 12V 4 channels running GH and GL = 1nF Load each VIN Supply Current 28 mA VIN = 12V Switching Frequency = 300kHz 4 channels running GH and GL=1nF Load each VIN Supply Current 50 mA VIN = 12V Switching Frequency = 1MHz BUCK CONTROLLERS PARAMETER MIN TYP MAX UNITS CONDITIONS mV -20 20 0.9 VOUT 2.5V VOUT Regulation Accuracy mV -40 40 2.6 VOUT 5.1V Feedback Resolution 5 mV 0.9 VOUT 2.5V 2.6 VOUT 5.1V Feedback Resolution 10 mV VOUT input voltage Programmable range of each 0.9 5.1 V channel. regulation range 0.9 VOUT 2.5V VOUT set point resolution 50 mV VOUT set point resolution 100 mV 2.6 VOUT 5.1V 0.9 < VOUT 2.5V VOUT Input Current 1 A VOUT Input Resistance 120 k 2.6 VOUT 5.1V 2