STPMIC1CPQR datasheet(15/140 Pages) STMICROELECTRONICS

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Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VOUT2-RIPP

Output voltage

ripple

IBK2OUT = 1000 mA, HP mode, TA = +25 °C

IOUT2

Continuous

output current

2.8<VBUCK2IN<5.5 V, HP mode

1000

2.8< VBUCK2IN<5.5 V, LP mode

IOUT2_LP_PEAK

Peak output

current in LP

mode

2.8< VBUCK2IN<5.5 V, LP mode, tPEAK < 10 us

200

IBK2LIM

Inductor peak

current limit

1.6

fREFCLK

Reference

switching

frequency

MHz

IQ_BK2

Total quiescent

current

IBUCK2OUT = 0 mA, HP mode

220

300

µA

IBUCK2OUT = 0 mA, LP mode

IBUCK2IN_LKG

Input leakage

current

BUCK OFF

µA

EFFBK2

Efficiency

IBK2OUT=150 mA, TA = +25 °C

IBK2OUT=750 mA, TA = +25 °C

IBK2OUT=1000 mA, TA = +25 °C

VOUT2-LO

Load transient

regulation

HP mode; 0<IBK2OUT<1.0 A, ΔIBK2OUT = 450 mA,

tR = tF ~250 ns

LP mode; 0<IBK2OUT<50 mA ΔIBK2OUT = 50 mA,

tR = tF ~250 ns

VOUT2-LI

Line transient

regulation

ΔVBK2IN = 600 mV, ΔIBK2OUT = 0, tR = tF ~10 μs,

HP mode

1.5

VOUT2-OVR

Power-up

overshoot

2.8 V<VBK2IN<5.5 V, IBK2OUT~1 mA, TA = +25 °C,

0.725 V<VOUT2<1.5 V

tLP-HP-BK2

Recovery time

from LP to HP

mode

VOUT2_LP = VOUT2_HP

µs

tSU_BK2

Start-up delay

(delay before

voltage starts to

rise)

2.8 V<VBUCK2IN<5.5 V, refer to Figure 46. BUCKx

start-up/shutdown timings.

0.05

0.5

tSS_BK2

Soft-start duration

2.8 V<VBUCK2IN<5.5 V, 1 mA<IBK2OUT<100 mA,

VOUT2=1.2 V, refer to Figure 16. Buck4 load

transient in LP mode

235

400

µs

SRBK2

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

3.1

mV/µs

tSD_BK2

Shutdown

duration

From VOUT2 = 1.2 V to VOUT2<0.2 V, VIN=3.6 V,

COUT=22 µF

Slow PD, IBK2OUT<1 mA

1.5

Fast PD, IBK2OUT<1 mA

0.15

Buck converter 3

VBUCK3IN = 3.6 V, VOUT3 = 1.8 V, recommended BOM, Tj = -40 °C to +125 °C, unless otherwise specified

VBUCK3IN

Main input

voltage range

2.8(2)

5.5

STPMIC1

Electrical and timing parameters

DS12792 - Rev 7

page 15/140

STPMIC1CPQR Datasheet(PDF) 15 Page - STMicroelectronics

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