DA9231 datasheet(13/55 Pages) DIALOG

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DA9231

Ultra-Low Quiescent Current Buck and LDO

Datasheet

Revision 2.4

3-Sep-2018

CFR0011-120-00 Rev 5

13 of 55

Electrical Characteristics

VDD = VDD_SYS = 3.6 V, TJ = –40°C to 85°C. Typical values are at TJ = 25°C (unless otherwise

noted).

Table 5: Input Currents

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Electrical performance

IQ_BUCK_LD

O_ON_NO_L

Buck and LDO no load

quiescent current

-40 °C < TJ < 85 °C

Buck enabled and regulating

with no load

LDO enabled

2.5 V

≤ VVDD_SYS ≤ 5.5 V

VBUCK = 1.8 V

VVLDO = 0.8 V

1.35

4.25

μA

IQ_BUCK_ON

_NO_LD

Buck no load quiescent

current

-40 °C < TJ < 85 °C

Buck enabled and regulating,

no load

2.5 V

≤ VVDD_SYS ≤ 5.5 V

VBUCK = 1.8 V

0.75

3.5

μA

Table 6: Buck Output

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Electrical performance

RON_PMOS

On resistance of PMOS

pass device

VVDD_SYS = 3.6 V

IOUT = 50 mA

600

800

RON_NMOS

On resistance of NMOS

pass device

VVDD_SYS = 3.6 V

IOUT = 50 mA

300

450

RSYS_DHCG

MOSFET on-resistance for

buck discharge

VVDD_SYS = 3.6 V

IOUT = -10 mA into VOUT pin

tSTART

Buck start-up time

VVDD_SYS = 3.6 V

VBUCK = 1.8 V

IOUT = 0 A from BUCK_EN =

1 to switching start

ILIM_SW_PM

SW current limit PMOS

VVDD_SYS = 3.6 V

VBUCK = 1.8 V

600

tOFF

Off time in continuous

conduction mode

VBUCK = 1.8 V

270

fSW

Switching frequency in

continuous conduction

mode

MHz

IOUT_MAX

Maximum DC output

current

300

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