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DA9073

Ultra-Low Quiescent Current PMIC

Datasheet

Revision 3.3

13-Oct-2020

37 of 130

9.2

Battery-Powered Operation

When the power source is unplugged (VDD_PWR < UVLO ), the DA9073 is battery-powered

provided that VBAT exceeds VBAT_UVLO (register 0x0E) In this condition, the device will be in one

of three modes: Ship mode, Active battery mode, or High Impedance mode (Hi-Z).

9.2.1

Ship Mode

Ship mode is an ultra-low leakage standby state that minimizes battery depletion while the product

sits on the shelf. Typical battery current in ship mode is 5nA.

There are two methods to enter Ship mode:

1. By Register Write

a. VDD_PWR disconnected

b. MODE pin high

c. Enter Ship mode by setting EN_SHIPMODE bit high: 0x0D [0] = 1

d. The IC enters Ship mode immediately

(If VDD_PWR is plugged in, Ship mode entry is delayed until power is removed)

2. By Pushbutton Timer pin, RIN_N

a. VDD_PWR disconnected

b. MODE pin high

c. Enable RIN_N control of ship mode: 0x10 [1:0] = 0x01

d. Pull RIN_N low for longer than the reset period: RIN_N_PER_RST (0x10 [7:6])

e. The IC enters Ship mode when RIN_N is released (internally pulled up)

To exit Ship mode, apply VDD_PWR or toggle RIN_N low for longer than 50msec. Upon waking from

Ship mode, all pre-programmed OTP values are loaded.

9.2.2

Active Battery and High Impedance Modes

Under battery power there are two modes of operation, controlled by the MODE pin. A rising edge on

MODE puts the DA9073 in Active Battery mode. In this mode, all functions are active.

Conversely, a falling edge on MODE puts the DA9073 into Hi-Z mode, intended to be used during

system standby states with low power consumption. In this mode, the following communication

functions are placed in a high impedance mode to reduce leakage from the battery: I2C interface, the

SYS_FLT and PWR_FLT status outputs, and watchdog timer (WD).

All other functions and outputs remain active, with the exception of TSD.

Caution: The Thermal Shutdown function is not active in Hi-Z mode. Hi-Z mode should not be used in

high power dissipation or heavy load conditions.

Hi-Z mode can also be entered by setting the HZ_MODE bit to 1 (0x0D [1]); or by using RIN_N

pushbutton by setting 0x10 [1:0] to 2 and pulling RIN_N low for more than the RIN_N reset time

(0x10 [7:6]).

The DA9073 exits Hi-Z mode at a MODE pin rising edge or when VDD_PWR is applied. When

VDD_PWR is removed, the part will enter Active Battery mode regardless of the MODE pin state.

The behavior of the MODE pin depends on whether VDD_PWR is connected, shown in Table 21.

The MODE pin is internally pulled low.

DA9073 Datasheet(PDF) 37 Page - Dialog Semiconductor

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