STPMIC1APQR datasheet(18/140 Pages) STMICROELECTRONICS

18 / 140 page

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VOUT4-LO

Load transient

regulation

HP mode; 0<IBK4OUT<2.0 A, ΔIBK4OUT = 500 mA,

tR = tF ~250 ns

LP mode; 0<IBK4OUT<50 mA ΔIBK4OUT = 50 mA,

tR = tF ~250 ns

VOUT4-LI

Line transient

regulation

ΔVBK4IN = 600 mV, ΔIBK4OUT = 0, tR = tF ~10 μs,

HP mode

1.5

VOUT4-OVR

Power-up

overshoot

2.8 V<VBK4IN<5.5 V, IBK4OUT~1 mA, TA = +25 °C,

0.725 V<VOUT4<1.5 V

tLP-HP-BK4

Recovery time

from LP to HP

mode

VOUT4_LP = VOUT4_HP

µs

tSU_BK4

Startup delay

(delay before

voltage starts to

rise)

2.8 V<VBUCK4IN<5.5 V, refer to Figure 16. Buck4

load transient in LP mode.

0.05

0.5

tSS_BK4

Soft-start duration

2.8 V<VBUCK4IN<5.5 V, 1 mA<IBK4OUT<100 mA,

VOUT4 = 1.2 V, refer to Figure 46. BUCKx start-up/

shutdown timings

235

400

µs

SRBK4

Output voltage

slew rate

Slew rate during start-up

5.5

mV/µs

DVS slew rate of a voltage programmed change

low to high or high to low, from 0.8 V to 1.2 V

1.9

3.1

mV/µs

tSD_BK4

Shutdown

duration

From VOUT4 = 1.2 V to VOUT4<0.2 V, VIN=3.6 V,

COUT = 22 µF

Slow PD, IBK4OUT<1 mA

1.5

Fast PD, IBK4OUT<1 mA

0.15

Boost converter

VIN = 3.6 V, VBSTOUT = 5.2 V, TA = 25 °C, Tj = -40 °C to +125 °C, recommended BOM, unless otherwise specified

VIN

Main input

voltage range

2.8

5.5

VOUT

Output voltage

range

2.8 V<VBSTOUT<5.2 V, boost mode

5.2

5.2 V<VBSTOUT<5.5 V, bypass mode

~VBOOSTIN

VBST-ACC

Output voltage

accuracy

2.8 V<VBSTIN<3.3 V, 0<IBSTOUT<0.5 A or 3.3

V<VBSTIN<5.5 V, 0<IBSTOUT<1.1 A

-3.5

3.5

VBSTOVP

Overvoltage

threshold

5.5

5.7

5.85

IBSTOUT_HI

Continuous

output current

3.3 V<VBSTIN<5.5 V

1.1

IBSTOUT_LO

Continuous

output current

2.8 V<VBSTIN<3.3 V

0.5

IBSTOUT_LKG

Output leakage

current

BSTOUT, boost OFF, pull-down disabled

µA

IBSTLIM

Inductor peak

current limit LS

3.3

IBSTSH

Short-circuit

threshold HS

Quiescent current

IBSTOUT=0 mA

600

900

µA

EFFBST

Efficiency

IBSTOUT=2.5 mA, TA = 25 °C

STPMIC1

Electrical and timing parameters

DS12792 - Rev 7

page 18/140

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