XRP7708 datasheet(2/27 Pages) EXAR

2 / 27 page

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Rev. 1.0.3

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

LXx..............................................................-1V to 22V

Logic Inputs............................................................. 6V

BSTx, GHx.................................................... 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 θJA ...................................... 18°C/W

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.

Typ.

Max.

Units

Conditions

VIN Supply Current in STANDBY

LDOOUT enabled (no load)

No switching converter channels enabled

I2C communication active

Switching frequency = 400kHz

VIN Supply Current in

SHUTDOWN

180

µA

EN=0V, VIN1=VIN2=12V

VIN Supply Current

4 channels running,

GH and GH = 1nF load each

VIN=12V, Switching frequency = 300kHz

VIN Supply Current

4 channels running,

GH and GH = 1nF load each

VIN=12V, Switching frequency = 1MHz

Step Down Controllers

Parameter

Min.

Typ.

Max.

Units

Conditions

VOUT Regulation Accuracy

-20

•

0.9V ≤ VOUT ≤ 2.5V

-40

•

2.6V ≤ VOUT ≤ 5.1V

VOUT regulation range

0.9

5.1

•

Programmable range of each channel1

VOUT set point resolution

0.9V ≤ VOUT ≤ 2.5V

VOUT set point resolution

100

2.6V ≤ VOUT ≤ 5.1V

VOUT Input Current

TBD

•

0.9V < VOUT <= 2.5V

VOUT Input Resistance

120

kΩ

2.6V ≤ VOUT ≤ 5.1V

Load Current

Controllers 1 and 3 can each be

configured up to a 5A load.

Controllers 2 and 4 can each be

configured up to a 8A load.

Note 1: Voltages above 5.1V can be obtained by using an external voltage divider.

Low Drop-out Regulator

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