XXRRPP77772244 Quad Channel Digital PWM/PFM Quad Channel Digital PWM/PFM PPrrooggrraammmmaabbllee PPoowweerr MMaannaaggeemmeenntt SSyysstteemm October 2012 Rev. 1.0.1 GENERAL DESCRIPTION APPLICATIONS Servers The XRP7724 is a quad channel Digital Pulse Base Stations Width Modulated (DPWM) Step down (buck) Switches/Routers controller. A wide 4.75V to 5.5V and 5.5V to Broadcast Equipment 25V input voltage dual range allows for single Industrial Control Systems supply operation from standard power rails. Automatic Test Equipment With integrated FET gate drivers, two LDOs for Video Surveillance Systems standby power and a 105kHz to 1.23MHz FEATURES independent channel to channel programmable Quad Channel Step-down Controller constant operating frequency, the XRP7724 reduces overall component count and solution Digital PWM 105kHz-1.23MHz Operations footprint and optimizes conversion efficiencies. Individual Channel Frequency Selection A selectable digital Pulse Frequency Mode Patented digital PFM with Ultrasonic mode (DPFM) capable of better than 80% efficiency at light current load and low operating current Patented Over Sampling Feedback allow for portable and Energy Star compliant Integrated MOSFET Drivers applications. Each XRP7724 output channel is Programmable 5 coefficient PID control individually programmable as low as 0.6V with a resolution as fine as 2.5mV, and 4.75V to 25V Input Voltage configurable for precise soft start and soft stop 4.75V-5.5 and 5.5V-25V Input Ranges sequencing, including delay and ramp control. 0.6V to 5.5V Output voltage The XRP7724 operations are fully controlled 2 SMBus Compliant - I C Interface 2 via a SMBus-compliant I C interface allowing Full Power Monitoring and Reporting for advanced local and/or remote reconfiguration, full performance monitoring 3 x 15V Capable PSIO + 2 x GPIOs and reporting as well as fault handling. Full Start/Stop Sequencing Support Built-in independent output over voltage, over Built-in Thermal, Over-Current, UVLO temperature, over-current and under voltage and Output Over-Voltage Protections lockout protections insure safe operation On Board 5V and 3.3V Standby LDOs under abnormal operating conditions. On Board Non-volatile Memory The XRP7724 is offered in a RoHS compliant, green/halogen free 44-pin TQFN package. Supported by PowerArchitect TYPICAL APPLICATION DIAGRAM Fig. 1: XRP7724 Application Diagram Exar Corporation www.exar.com 48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 Fax. +1 510 668-7001 XXRRPP77772244 QQuuaadd CChhaannnneell DDiiggiittaall PPWWMM//PPFFMM Programmable Power Management System Programmable Power Management System ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS These are stress ratings only and functional operation of Input Voltage Range V ............................... 5.5V to 25V CC the device at these ratings or any other above those Input Voltage Range V = LDO5 ................ 4.75V to 5.5V CC indicated in the operation sections of the specifications VOUT1, 2, 3, 4 ...................................................... 5.5V below is not implied. Exposure to absolute maximum Junction Temperature Range ....................-40C to 125C rating conditions for extended periods of time may affect JEDEC Thermal Resistance JA ..........................30.2C/W reliability. VCCD, LDO5, LDO3 3, GLx, VOUTx ............. -0.3V to 7.0V ENABLE, 5V EXT ....................................... -0.3V to 7.0V GPIO0/1, SCL, SDA................................................ 6.0V PSIOs Inputs, BFB .................................................. 18V DVDD, AVDD ........................................................ 2.0V VCC ...................................................................... 28V LX ............................................................. -1V to 28V BSTx, GHx .................................................... VLXx + 6V Storage Temperature .............................. -65C to 150C Power Dissipation ................................ Internally Limited Lead Temperature (Soldering, 10 sec).................... 300C ESD Rating (HBM - Human Body Model) .................... 2kV 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, V = 5.5V to 25V, 5V EXT open. Note that in cases where there is a CC discrepancy in values shown in this section and other sections of the datasheet, the values in the Electrical Specification section shall be deemed correct and supersede the other values. QUIESCENT CURRENT Parameter Min. Typ. Max. Units Conditions VCC Supply Current in SHUTDOWN 10 20 A EN = 0V, VCC = 12V ENABLE Turn On Threshold 0.95 V VCC = 12V Enable Rising 0.82 10 uA EN=5V ENABLE Pin Leakage Current -10 EN=0V LDO3 3 disabled, all channels disabled A VCC Supply Current in STANDBY 440 600 GPIOs programmed as inputs VCC=12V,EN = 5V 2 channels on set at 5V, VOUT forced to VCC Supply Current 2ch PFM mA 3.1 5.1V, no load, non-switching, Ultra-sonic 2 off, VCC=12 V, No I C activity. 4 channels on set at 5V, VOUT forced to VCC Supply Current 4ch PFM 4.0 mA 5.1V, no load, non-switching, Ultra-sonic 2 off, VCC=12V, No I C activity. All channels enabled, Fsw=600kHz, gate VCC Supply Current ON 18 mA 2 drivers unloaded, No I C activity. 2012 Exar Corporation 2/29 Rev. 1.0.1