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DA9230

Ultra-Low Quiescent Current Buck

Datasheet

Revision 3.0

27-Feb-2020

CFR0011-120-00

13 of 47

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 Current

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Electrical performance

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

ILIM_PMOS_

SOFTSTART

PMOS switch current limit

during softstart

Current limit is reduced

during softstart

350

VOUT_VBUC

K_SNS

Buck output voltage range

Programable range, 50 mV

steps

0.6

1.9

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