ADP2116ACPZ-R7 datasheet(25/36 Pages) AD

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ADP2116

Rev. 0 | Page 25 of 36

OPERATION MODE CONFIGURATION

The dual-channel ADP2116 can be configured to one of four

modes of operation by connecting the OPCFG pin as detailed

in Table 7. The configuration sets the current limit for each

channel and enables or disables the transition to pulse skip

mode at light loads.

In the dual-phase configuration, the outputs of the two channels

are connected together and generate a single dc output voltage,

VOUT. For this single combined dual-phase output, only Mode 1

(see Table 7) can be used. In this mode, the error amplifiers of

both phases are used. The feedback pins (FB1 and FB2) are tied

together, the compensation pins (COMP1 and COMP2) are tied

together, the soft start pins (SS1 and SS2) are tied together, and

the enable pins (EN1 and EN2) are tied together.

In addition, if the power-good feature is used, PGOOD1 and

PGOOD2 should be tied together and then connected to VDD

using a single pull-up resistor.

When the ADP2116 is synchronized to an external clock, the

converters always operate in fixed-frequency CCM and do not

enter pulse skip mode at light loads. In this case, when configuring

the OPCFG pin, choose forced PWM mode.

Table 7. Current-Limit Operation Mode and Configuration

Maximum Output Current,

Peak Current Limit,

Mode

ROPCFG ± 5%

IOUT1 (A)/IOUT2 (A)

ILIMIT1 (A)/ILIMIT2 (A)

Power Savings at Light Load

0 Ω to VDD

3/3

4.5/4.5

Forced PWM

82 kΩ to GND

3/3

4.5/4.5

Pulse skip enabled

47 kΩ to GND

3/2

4.5/3.3

Forced PWM

27 kΩ to GND

3/2

4.5/3.3

Pulse skip enabled

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