XRP7740

Programmable Power Management System

Description

The XRP7740 is a quad-output Pulse-Width Modulated (PWM) step-down DC-DC controller with a built-in LDO for standby power and GPIOs. The device provides a complete power management solution in one IC and is fully programmable via the included I2C serial interface. Independent Digital Pulse Width Modulator (DPWM) channels regulate output voltages and provide all required protection functions such as current limiting and overvoltage protection.

Each output voltage can be programmed from 0.9V to 5.1V without the need of an external voltage divider. The wide range of the programmable DPWM switching frequency (from 300 KHz to 1.5 MHz) enables the user to optimize between efficiency and component size. Input voltage range is from 6.5V to 20V. Two controllers support a load of up to 5A, while the other two controllers support up to 15A.

I2C bus interface is provided to program the IC as well as to communicate with the host for fault reporting and handling, power rail parameters monitoring, etc.

The device offers a complete solution for soft-start and soft-stop. The start-up delay and ramp of each PWM regulator can be independently controlled. The device can start up a pre-biased PWM channel without causing large negative inductor current.

The Exar Configuration Model XR77xxEVB-XCM-V80 interface board provides designers with a simple, quick and inexpensive means of evaluating and prototyping new designs using Programmable Universal PMIC devices with PowerArchitect4. This Evaluation Board is designed only for low volume engineering purposes; not production volumes. For production requirements commercial programmers must be used. The Evaluation Board is provided “as is and whereas” and without any warranty as to results, merchantability or purpose. Exar is not responsible for misuse of the Evaluation Board.

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Features

  • Four switching buck (step-down) controllers each with internal FET drivers. Two controllers (2 & 4) support loads up to 15A; two controllers (1 & 3) support load up to 5A.
  • 6.5V to 20V input voltage range – no additional voltage rails required
  • Output voltages programmable from 0.9V to 5.1V
  • Up to 6 reconfigurable GPIO pins
  • Fully programmable via I2C interface
  • Independent Digital Pulse Width Modulator (DPWM) channels with five coefficient PID control
  • High integration: elimination of external circuits and components required for compensation, parameter adjustment and interface
  • Programmable DPWM frequency range (300 kHz to 1.5 MHz) enables efficiency and component size optimization
  • Complete power monitoring and reporting
  • Independently controlled start-up delay and ramp for each regulator, including soft-start with a pre-biased load voltage
  • Independently controlled soft-stop delay and ramp for each regulator with a programmable stop voltage
  • Over temperature protection (OTP) and undervoltage lockout (UVLO); per-channel overcurrent protection (OCP) and overvoltage protection (OVP)
  • Built-in LDO (configurable to 3.3V or 5V) with overcurrent protection
  • Non-volatile memory for system configuration
  • Evaluation Board and Configuration Module (XCM) are available for evaluation and development purposes only
  • PowerArchitect™ Design and Configuration Software

Application

  • Computing: servers, storage systems
  • Consumer: set-top box (STB), game systems
  • Industrial: ATE, DC-DC converters, video processing
  • Plasma display panel (PDP)
  • Networking and telecommunications equipment

Design Tools

Evaluation Hardware and Software

Packaging

Pkg Code Details Quantities Dimensions PDF
TQFN40 6x6
  • JEDEC Reference: MO-220
  • MSL Pb-Free: L3 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 18.1ºC/W
  • Bulk Pack Style: Tray
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 3000
  • Quantity per Tube: n/a
  • Quantity per Tray: 490
  • Reel Size (Dia. x Width x Pitch): 330 x 16 x 12
  • Tape & Reel Unit Orientation: Pin 1 at sprocket hole.
  • Dimensions: mm
  • Length: 6.00
  • Width: 6.00
  • Thickness: 0.75
  • Lead Pitch: 0.50

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
XRP7740ILB-0X18-F TQFN40 6x6 Active
XRP7740ILB-F TQFN40 6x6 Active
XRP7740ILBTR-0X18-F TQFN40 6x6 Active
XRP7740ILBTR-F TQFN40 6x6 EOL
XR77XXEVB-XCM-V80 Board Active
XRP7740EVB Board Active
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Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Distribution Date Description File
07/11/2017 Product Discontinuation Notification PDN_17-0623-01-1033.pdf
01/05/2017 Addition of an alternate qualified location, ANST, China. PCN 16-0835-01 ANST-1033.pdf
10/15/2010 Package/Shipping Change: New carrier tape dimension. Standardization. PCN_10-1011-01-1033.pdf