DA9233 datasheet(22/50 Pages) RENESAS

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DA9233

Integrated Ultra-Low Quiescent Current, Ultra-Low

Output Ripple Buck Regulator with 100 mA LDO

Datasheet

Revision 2.2

13-Jun-2023

CFR0011-120-00 Rev 5

22 of 50

10 Feature Descriptions

10.1 Chip Enable and Disable Through IC_EN

DA9233 features a dedicated IC_EN pin to enable and disable the chip. When IC_EN = high, the

device is turned on. IC_EN voltage should not exceed VDD_SYS voltage on the device. When

EN = low, the device is shut down completely, including I2C communications.

10.2 VDD Under-Voltage Lockout

DA9233 features an under-voltage lockout (UVLO) on VDD. When VDD falls below UVLO falling

threshold, both buck and LDO are disabled, see Section 10.4.9 for fault behaviour and control, A

VIN_UV_Event will be flagged if it is not masked. When VDD rises above the UVLO rising threshold,

the device will be alive. VDD should be always tied to VDD_SYS on the PCB board so both VDD and

VDD_SYS will share the same UVLO protection.

10.3 Over-Temperature Protection

DA9233 also features an on-Chip over-temperature protection (TSD). The die junction temperature is

monitored when LDO is ON. When the junction temperature is higher than the thermal shutdown

threshold, both buck and LDO are disabled to prevent the device being damaged by over-heating,

see Section 10.4.9 for fault behavior and control. An OT_Event will be flagged if it is not masked.

10.4 Buck Regulator

DA9233 includes a nano-ampere standby buck regulator with an adjustable output voltage, Dynamic

Voltage Scaling capability and a maximum load current of 60 mA. It also has power saving mode

operation and different protection features.

10.4.1

Buck Output Voltage Programmability

The DA9233 buck regulator can be set to two different ranges based on the value of

VOUT_RANGE_HI. The value of BUCK_VOUT<4:0> is locked to a certain range based on the value

of VOUT_RANGE_HI, and VOUT_RANGE_HI can only be changed while the buck is disabled. The

buck can be set to the output voltages shown in Table 11. If a command is received outside of the

allowable range (that is above 1.3 V for VOUT_RANGE_HI = 0 or below 1.3 V for

VOUT_RANGE_HI = 1), digital will force the value of BUCK_VOUT<3:0> to 01110 (1.3 V).

Table 11: Buck Output Voltage Settings

VOUT_RANGE_HI

BUCK_VOUT<4:0>

Buck Output Voltage (V)

00000

0.60

00001

0.65

00010

0.70

00011

0.75

00100

0.80

00101

0.85

DA9233 Datasheet(PDF) 22 Page - Renesas Technology Corp

DA9233 Datasheet(HTML) 22 Page - Renesas Technology Corp

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