DA9021 datasheet(43/142 Pages) DIALOG

43 / 142 page

DA9021/22

System PMIC with high efficiency USB power manager

Datasheet

Revision 2.5

17-Feb-2017

CFR0011-120-00 Rev 5

43 of 142

10 Typical characteristics

10.1 Buck regulator performance

Figure 7: BUCKPERI efficiency curves

Figure 8: BUCKCORE efficiency curves

Figure 9: BUCKPRO efficiency curves

Figure 10: BUCKMEM efficiency curves

Figure 11: Typical buck line transient

Figure 12: Typical buck load transient

Note 1

Ch2: VBAT, Ch3: VOUT, Ch4: ICOIL

VOUT = 2.5 V, no load,

VBAT = 3.0 V to 3.6 V step,

t_rise = t_fall = ~10 µs

Note 1

Ch1: ICOIL, Ch2: VOUT, Ch4: ILOAD

VOUT = 1.8 V, VBAT = 4 V,

ILOAD = 0 V to 500 mA, dI/dt~50 mA/µs, rising

Buck Peri, Vbat=3.7V, Vout=3.3V

100

0.0010

0.0100

0.1000

1.0000

Iload (A)

Auto Model

PFM mode

PWM Mode

Buck Core, Vbat=3.2V, Vout=2.075V

100

0.0010

0.0100

0.1000

1.0000

Iload (A)

Auto Model

PFM mode

PWM Mode

Buck Pro, Vbat=3.2V, Vout=2.075V

100

0.0010

0.0100

0.1000

1.0000

Iload (A)

Auto Model

PFM mode

PWM Mode

Buck Mem, Vbat=3.7V, Vout=2V

100

0.0010

0.0100

0.1000

1.0000

Iload (A)

Auto Model

PFM mode

PWM Mode

DA9021 Datasheet(PDF) 43 Page - Dialog Semiconductor

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