NPM1100-CAAA-R datasheet(10/58 Pages) NORDIC

10 / 58 page

Product overview

VOUTSET1) for different application circuit requirements. BUCK is supplied by VINT (from SYSREG or the

battery). See BUCK — Buck regulator on page 28 for more information and electrical parameters.

The device also features Ship mode, the lowest quiescent current state. It disconnects the battery from

the system and reduces the quiescent current of the device to extend battery life when products are in

storage. See Using Ship mode on page 10 and Charging and Error LED drivers on page 11 for more

information.

3.3 Power-on reset (POR) and brownout reset (BOR)

When one of the following conditions are met, a power-on reset (POR) occurs.

•

VBUS voltage rises above VBUSPOR

•

VBAT voltage rises above VBATPOR

VBATPOR has a minimum and maximum range. To ensure the device exits reset, the voltage should be

above the maximum of the parameter.

When both of the following conditions are met, a brownout reset (BOR) occurs.

•

VBUS voltage falls below VBUSBOR

•

VBAT voltage falls below VBATBOR

BOR may occur if both supply voltages are below the maximum of the parameter range. BOR occurs if

both supply voltages are below the minimum of the parameter range.

The device is held in reset, or System OFF, when both supply voltages

VBAT and VBUS are below

minimum thresholds.

3.4 DPPM — Dynamic power-path management

Dynamic power-path management (DPPM) is a feature that regulates internal voltage (VINT) as system

load (ISYS) changes to maintain supply to the application circuit (supplied by the

VSYS and VOUTB pins).

CHARGER applies DPPM during charging, after charging completes, or when the

VBUS pin is disconnected,

to dynamically control current in and out of the battery. See DPPM — Dynamic power-path management

on page 23.

3.5 Using Ship mode

Ship mode isolates the battery, reducing quiescent current.

To enter Ship mode,

SHPACT must be set high for a minimum period of tactiveToShip when VBUS is

disconnected and

SHPHLD held high (VIH). SHPACT has an internal pull-down resistor. SHIPACT can be

connected to a microcontroller GPIO (using logic levels in the range VIL and VIH) or to a PCB test pin for

activation at the end of production.

Note:

VBUS must be discharged to below minimum level VBUSMIN which may require waiting for

any capacitive discharge before activating

SHPACT.

There are two ways to exit Ship mode. Either connect the USB (

VBUS) or set SHPHLD low for a minimum

period of tshipToActive. The battery supply (

VBAT) is used to hold SHPHLD high through a weak pull-up

resistor when Ship mode is enabled. A circuit to pull

SHPHLD down is optional (see the Button switch

shown in the following figure). If no pull-down circuit is present, Ship mode is exited when

VBUS is

connected.

4445_367 v1.0

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