NRF52811-QCAA-R datasheet(48/444 Pages) NORDIC

48 / 444 page

Power and clock management

5.2.1.10 WDT active

Symbol

Description

Min.

Typ.

Max.

Units

IWDT,STARTED

WDT started

1.3

µA

5.3 POWER — Power supply

This device has the following power supply features:

• On-chip LDO and DC/DC regulators

• Global System ON/OFF modes with individual RAM section power control

• Analog or digital pin wakeup from System OFF

• Supervisor HW to manage power on reset, brownout, and power fail

• Auto-controlled refresh modes for LDO and DC/DC regulators to maximize efficiency

• Automatic switching between LDO and DC/DC regulator based on load to maximize efficiency

Note: Two additional external passive components are required to use the DC/DC regulator.

5.3.1 Regulators

The following internal power regulator alternatives are supported:

• Internal LDO regulator

• Internal DC/DC regulator

The LDO is the default regulator.

The DC/DC regulator can be used as an alternative to the LDO regulator and is enabled through the

DCDCEN on page 59 register. Using the DC/DC regulator will reduce current consumption compared to

when using the LDO regulator, but the DC/DC regulator requires an external LC filter to be connected, as

shown in DC/DC regulator setup on page 49.

POWER

REG

LDO

DCDCEN

VDD

DCC

GND

DEC4

1.3V System power

Supply

DC/DC

Figure 13: LDO regulator setup

4454_140 v1.0

NRF52811-QCAA-R Datasheet(PDF) 48 Page - Nordic Semiconductor

NRF52811-QCAA-R Datasheet(HTML) 48 Page - Nordic Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL