DA9061 datasheet(36/82 Pages) DIALOG

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DA9061

Entry level PMIC for applications requiring up to 6 A

Datasheet

Revision 3.2

01-Mar-2016

CFR0011-120-00 Rev 5

36 of 82

Operating mode

6.7.6

The operating mode of each converter can be set via the buck control (BUCK<x>_MODE) to

synchronous (PWM), sleep (PFM), or auto. In auto mode the buck converter switches between PWM

and PFM depending on the load current. This mode is recommended for applications that require fast

transitions from synchronous to sleep operation. The current consumption during PWM operation is

10 mA and drops to <1 µA in shutdown.

In addition, the buck mode can be controlled with the A and B setting. If BUCK<x>_SL_B is set, the

buck is forced to SLEEP mode when the B setting is active. Similarly, if BUCK<x>_SL_A is set, the

buck is forced to SLEEP mode when the A setting is active.

Half-current mode

6.7.7

Buck1 can operate in half-current mode where the quiescent current is reduced by disabling half of

the pass devices. As the name implies, enabling this option halves the output current, and therefore,

this feature is valuable in applications where quiescent current is critical and full current is not

needed. This feature is controlled with BUCK1_FCM. If the bit is asserted (BUCK1_FCM = 1), the

corresponding buck is in full-current mode and the full current is available. If the bit is de-asserted,

the corresponding buck is in half-current mode. Operating the bucks in full-current mode requires

twice as much output capacitance (2 x 47 µF) as the half-current mode (2 x 22 µF).

DA9061 bảng dữ liệu(PDF) 36 Page - Dialog Semiconductor