LTC7106

1

Rev A

For more information www.analog.com

Document Feedback

TYPICAL APPLICATION

FEATURES

DESCRIPTION

A 7-Bit Current DAC with

PMBus Interface

The LTC®7106 is a precision, PMBus controlled, bidi-

rectional current digital-to-analog converter that adjusts

regulator. The LTC7106 can work with the vast majority

of power management controllers or regulators to enable

digital control of the output voltage. Internal power-on

reset circuitry keeps the DAC output current at zero

(high impedance IDAC) until a valid write takes place.

Features include a range bit for easy interfacing to almost

any impedance resistor divider, and an open-drain GPO

output for controlling the Run or Enable pin of the DC/

DC regulator. For most applications, the current DAC error

is significantly attenuated with proper design. See more

section of this data sheet. The LTC7106 is supported by

the ADI LTpowerPlay® development tool with graphical

user interface (GUI).

APPLICATIONS

n

(Over Temp)

n

(Over Temp)

n

n

Input Voltage Range: 2.5V to 5.5V

n

High Impedance at IDAC Output When Disabled

n

Wide IDAC Operation Voltage (0.4V to 2.0V)

n

7-Bit Programmable DAC Output Current for DC/DC

n

Wide Range IDAC Output Current: ±16μA to ±256μA

n

Programmable Slew Rate: 500ns ~ 3ms per Bit

n

Available in a 10-Lead (3mm × 2mm) DFN Package

n

General Purpose Power Systems

n

Telecom Systems

n

Industrial Applications

All registered trademarks and trademarks are the property of their respective owners.

Margin High and Margin Low

CIRCUIT OF FIGURE 11

100ms/DIV

EN

2V/DIV

5V/DIV

7106 TA01b

C1

1µF

10k

R1

10k

R2

C2

330µF

L1

R4

10k

LTC7106

GND

IDAC

SDA

SCL

ALERT

GPO

ASEL0

ASEL1

2.5V

TO 5.5V

SDA

ALERT

SCL

DC/DC

SW

RUN

EN

(0.4V to 2V)

10k

R3

PMBus INTERFACE

–64 A TO 0 A

0 A TO 63 A

7106 TA01a