XRP7708EVB

XRP7708EVB Datasheet


XRP7708 and XRP7740

Part Datasheet
XRP7708EVB XRP7708EVB XRP7708EVB (pdf)
Related Parts Information
XRP7708ILB-F XRP7708ILB-F XRP7708ILB-F
PDF Datasheet Preview
April 2011

XRP7708 and XRP7740

Quad Channel Digital PWM Step Down Controllers

The XRP7708 and XRP7740 are quad-output pulse-width modulated PWM step-down DCDC controllers with a built-in LDO for standby power and GPIOs. The devices provide a complete power management solution in one IC and are fully programmable via an I2C serial interface. Independent Digital Pulse Width Modulator DPWM channels regulate output voltages and provide all required protection functions such as current limiting and over-voltage 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 MHz enables the user to optimize between efficiency and component size. Input voltage range is from 6.5V to 20V. An 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 softstart 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.

TYPICAL APPLICATION DIAGRAM
• Multi Channel Programmable Power Supplies
• Audio-Video Equipment
• Industrial & Telecom Equipment
• Processors & DSPs Based Equipment
• 4 Channel Step Down Controller − 3ohm/1.8ohm driver XRP7740 − 5ohm/1.8ohm driver XRP7708 − Programmable Output Voltage 0.9V-5.1V − Programmable 1.5MHz DPWM Frequency
• 6.5V-20V Single Input Voltage Range
• Up to 6 Reconfigurable GPIO Pins
• Fully Programmable via I2C Interface
• Independent Digital Pulse Width

Modulator DPWM channels
• Complete Monitoring and Reporting
• Complete Power Up/Down Sequencing
• Full On Board Protection

OTP, UVLO, OCP and OVP
• Built-in 3.3V/5V LDO
• PowerArchitect Design Software
• Green/Halogen Free 40-pin TQFN

XRP7708 XRP7740

Fig. 1 XRP7708 or XRP7740 Application Diagram

Exar Corporation 48720 Kato Road, Fremont CA 94538, USA

Tel. +1 510 668-7000 Fax. +1 510 668-7001

XRP7708 and XRP7740

Quad Channel Digital PWM Step Down Controllers

ABSOLUTE MAXIMUM RATINGS

These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications 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 to 22V Logic 6V BSTx, VLXx + 5V Storage Temperature -65°C to 150°C Lead Temperature Soldering, 10 sec 300°C

OPERATING RATINGS

Operating Input Voltage VINX ........................6.5V to 20V Junction Temperature Range ....................-40°C to 125°C Thermal Resistance

ELECTRICAL SPECIFICATIONS

Specifications with standard type are for an Operating Junction Temperature of TJ = 25°C only limits applying over the full 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 = 25°C, and are provided for reference purposes only. Unless otherwise indicated, VIN1 = 6.5V to 20V, VIN2 = 6.5V to 20V, Enable=HIGH, CGL = CGH = 1nF.

Quiescent Current

Parameter

Min.

VIN Supply Current in STANDBY

VIN Supply Current in SHUTDOWN VIN Supply Current

Typ. 9
180 28

Max.

Units
µA mA

VIN Supply Current

Conditions

LDOOUT enabled no load No switching converter channels enabled I2C communication active Switching frequency = 400kHz

EN=0V, VIN1=VIN2=12V
4 channels running, GH and GH = 1nF load each VIN=12V, Switching frequency = 300kHz 4 channels running, GH and GH = 1nF load each VIN=12V, Switching frequency = 1MHz
ORDERING INFORMATION

Junction Temp Range

Marking

XRP7708ILB- F

XRP7708ILB YYWW X

XRP7708ILBTR-F

XRP7708ILB YYWW X

XRP7740ILB- F

XRP7740ILB YYWW X

XRP7740ILBTR-F

XRP7740ILB YYWW X

XRP7740ILB

XRP7740ILB-0X180-F

YYWW X 0X18

XRP7740ILB

XRP7740ILBTR-0X18-F

YYWW X 0X18

XRP7708EVB

XRP7708 Evaluation Board

XRP7740EVB

XRP7740 Evaluation Board

Package 40-pin TQFN

Packing Quantity

Bulk
40-pin TQFN 3K/Tape & Reel
40-pin TQFN

Bulk
40-pin TQFN 3K/Tape & Reel
40-pin TQFN

Bulk
40-pin TQFN 3K/Tape & Reel
“YY” = Year “WW” = Work Week “X” = Lot Number

Note 1 Halogen Free Halogen Free Halogen Free Halogen Free Halogen Free

Halogen Free

Default I2C Address
0X18
2011 Exar Corporation
7/28

XRP7708 and XRP7740

Quad Channel Digital PWM Step Down Controllers

TYPICAL PERFORMANCE CHARACTERISTICS
More datasheets: LPS152 | 383-2UYC/S400-A8 | AS1352 | AS1352V-T | AS1352-C0CF-T | AS1352_7BC0-T | AS1352-7BC0_EK_ST | AS1352V | FFA05U120DNTU | FSB127AHN


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Datasheet ID: XRP7708EVB 512935