XXRRPP77771144 QQuuaadd CChhaannnneell DDiiggiittaall PPWWMM SStteepp DDoowwnn CCoonnttrroolllleerr March 2011 Rev. 1.1.6 GENERAL DESCRIPTION APPLICATIONS The XRP7714 is a quad-output pulse-width Multi Channel Power Supplies modulated (PWM) step-down DC-DC controller Audio-Video Equipments with a built-in LDO for standby power and Industrial & Telecom Equipments GPIOs. The device provides a complete power Processors & DSPs Based Equipments management solution in one IC and is fully 2 programmable via an IC serial interface. FEATURES Independent Digital Pulse Width Modulator (DPWM) channels regulate output voltages 4 Channel Step Down Controller and provide all required protection functions Programmable Output Voltage 0.9V-5.1V such as current limiting and over-voltage Programmable 1.5MHz DPWM Frequency protection. Integrated FET Drivers Each output voltage can be programmed from 4.75V to 5.5V and 5.5V to 25V Input 0.9V to 5.1V without the need of an external Voltage Range voltage divider. The wide range of the programmable DPWM switching frequency Up to 6 Reconfigurable GPIO Pins 2 (from 300 KHz to 1.5 MHz) enables the user to Fully Programmable via I C Interface optimize between efficiency and component Independent Digital Pulse Width size. Input voltage range is from 4.75V to Modulator (DPWM) channels 2 25V. An I C bus interface is provided to Complete Monitoring and Reporting program the IC as well as to communicate with the host for fault reporting and handling, Complete Power Up/Down Sequencing power rail parameters monitoring, etc. Full On Board Protection OTP, UVLO, OCP and OVP The device offers a complete solution including independently programmable: soft-start, soft- Built-in 3.3V/5V LDO stop, start-up delay and ramp of each PWM PowerArchitect Design Software regulator. Green/Halogen Free 40-pin TQFN TYPICAL APPLICATION DIAGRAM Vout1 VIN: 4.75 TO 25V LX1 VOUT1 VCCA L1 Q1 C1 Vin GH1 C2 Q2 C3 GL1 LX1 LDO OUT GL1 GH1 C4 D1 C5 VCCD Vout2 LX2 VOUT2 Vin L2 Q3 C6 GH2 C7 Q4 1 30 C8 GL2 GL2 AVDD GL2 2 29 DVDD LX2 LX2 3 28 C9 GPIO0 GPIO0 GH2 GH2 D2 4 27 VCCD GPIO1 GPIO1 BST2 R1 Vout4 U1 LX4 5 26 VCCA Vin VOUT4 C10 GPIO2 GPIO2 VCCD D3 XRP7714 6 25 L3 Q5 GPIO3 GPIO3 BST4 R2 7 24 GH4 C13 SDA GPIO4 SDA GH4 GH4 Q6 ENABLE C11 I2C C12 GL4 8 23 SCL GPIO5 SCL LX4 LX4 C14 9 Exposed Pad: DGND 22 ENABLE ENABLE GL4 GL4 Vout3 10 21 DGND PGND4 LX3 VOUT3 Vin L4 Q7 D4 VCCD GH3 C16 C15 Q8 Vout4 GL3 GH3 C17 GL3 LX3 Vout3 Vout2 Vout1 Fig. 1: XRP7714 Application Diagram Exar Corporation www.exar.com 48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 Fax. +1 510 668-7001 11 40 AGND LDOOUT 12 39 VOUT1 VIN1 13 38 VOUT2 VIN2 14 37 VOUT3 VCCA 15 36 VOUT4 PGND1 16 35 PGND3 GL1 17 34 GL3 LX1 18 33 LX3 GH1 19 32 GH3 BST1 20 31 BST3 PGND2XXRRPP77771144 QQuuaadd CChhaannnneell DDiiggiittaall PPWWMM SStteepp DDoowwnn CCoonnttrroolllleerr ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS Input Voltage Range ..................................... 5.5V to 25V These are stress ratings only and functional operation of the device at these ratings or any other above those Input Voltage VIN=VCCA ........................... 4.75V to 5.5V indicated in the operation sections of the specifications Junction Temperature Range .................... -40C to 125C below is not implied. Exposure to absolute maximum Thermal Resistance ....................................24.3C/W JA rating conditions for extended periods of time may affect reliability. VCCA, VCCD, LDOOUT, GLx, VOUTx ............................ 6V VDD ..................................................................... 2.0V VIN1, VIN2 ............................................................ 27V LXx .............................................................. -1V to 27V 1 LXx ............................................................. -5V to -1V Logic Inputs, GPIOs, SDA, SCL ................................... 6V BSTx, GHx .................................................... VLXx + 6V ESD Rating (HBM - Human Body Model) .................... 2kV Storage Temperature .............................. -65C to 150C Lead Temperature (Soldering, 10 sec) ................... 300C Note 1: 200ns Transient 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 T = 25C, and are provided for J reference purposes only. Unless otherwise indicated, VIN = 4.75V to 25V, VIN = 4.75V to 25V. 1 2 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, VIN15.2V, VIN225V 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 0.9V VOUT 2.5V -20 20 mV VOUT Regulation Accuracy -40 40 mV 2.6V VOUT 5.1V 2 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 100 nA 0.9V < VOUT <= 2.5V VOUT Input Resistance 120 k 2.6V VOUT 5.1V Note 2: Voltages above 5.1V can be obtained by using an external voltage divider. 2011 Exar Corporation 2/29 Rev. 1.1.6