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DA9220

High-Performance Dual-Channel DC-DC Converter

Datasheet

Revision 2.1

17-Sep-2020

CFR0011-120-00

21 of 62

4.2

Internal Circuits

4.2.1

IC_EN/Chip Enable/Disable

IC_EN is chip enable/disable control input. When IC_EN = 0, all blocks except for low IQ POR are

powered-down and buck output is pulled-down.

4.2.2

nIRQ/Interrupt

The interrupt triggers events. Trigger conditions and control registers for each interrupt event are

listed in Table 13.

Some of these events are categorized as fault events and affect device operation (for example, buck

disable), see Section 4.1.6.

Table 13: Interrupt List

Name

Polarity

(Note 1)

Trigger

IRQ Status

IRQ Mask

Deglitch

Period

Thermal

warning

(event)

TJ rising above TWARN

E_TEMP_WARN

M_TEMP_WARN

0 s

Thermal

critical

(event)

TJ rising above TCRIT

E_TEMP_CRIT

M_TEMP_CRIT

0 s

System

good

(event)

E_SG

M_SG

0 s

Buck1

power-good

(event)

Buck1 VOUT is in power-good

voltage range

(not under- or over-voltage)

E_PG1

M_PG1

0 s

Buck2

power-good

(event)

Buck2 VOUT is in power-good

voltage range

(not under- or over-voltage)

E_PG2

M_PG2

0 s

Buck1

over-voltage

(event)

Buck1 VOUT rising above

over-voltage

threshold (target voltage +

150 mV)

E_OV1

M_OV1

Rise:8 µs

Fall:8 µs

Buck2

over-voltage

(event)

Buck2 VOUT rising above

over-voltage

threshold (target voltage +

150 mV)

E_OV2

M_OV2

Rise:8 µs

Fall:8 µs

Buck1

under-

voltage

(event)

Buck1 VOUT falling below

under-voltage

threshold (target voltage -

VTH_PG)

E_UV1

M_UV1

0 s

Buck2

under-

voltage

(event)

Buck2 VOUT falling below

under-voltage threshold

(target voltage - VTH_PG)

E_UV2

M_UV2

0 s

Buck1

over-current

(event)

Buck1 current rising above

over-current threshold

E_OC1

M_OC1

0 s

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