STPMIC25BPQR datasheet(23/145 Pages) STMICROELECTRONICS

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3. Guaranteed by design - not tested in production.

4. See 1: startup sequence.

3.4.12

BUCK7

Table 17. Electrical and timing parameter specifications (BUCK7)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

BUCK7

VBUCKIN

Main input voltage

range

2.8

5.5

VOUT

Output voltage

VBUCKIN > Vout 0.8 V, VBUCKIN > 2.8 V programmable value

1.5 to

4.2

Voltage programming step

100

VOUT-ACC

Output voltage open

loop accuracy

HP mode

1.5 V < VOUT < 4.2 V

-1.5

+1.5

LP mode,

0 < IOUT < 50 mA

-4

VOUT-REG

Output load

regulation (1)

HP mode, CCM mode

1 mA < IOUT < 2.5 A

-1

VOUT-RIPP

Output voltage ripple

(3)

HP mode, 2.8 V < VBUCKIN< 5.5 V, 5 mA < IOUT < 2500 mA

15 (2)

mVPP

LP mode, 3.0 V < VBUCKIN < 5.5 V, 1.5 V < VOUT < 4.2 V

1 mA < IOUT < 50 mA

20 (2)

IOUT_LP_PEAK

Peak output current

in LP mode

2.8 V < VBUCKIN < 5.5 V, tPEAK up to 1 ms

200

IBKLIM

Inductor peak current

limit (with typical BoM

list)

Programmable value in NVM_BUCKS_IOUT_SHR

Ref. Table 1 NVM setting A and B version

Max output current steps (1 A, 1.5 A, 2 A, 2.5 A) can be defined based

on the selected inductor peak current limit level

1.2

1.8

2.5

3.0

2.1

2.6

3.1

3.6

2.6

3.1

3.6

4.1

fREFCLK

Reference switching

frequency

CCM mode

MHz

IQ_BCK

Total quiescent

current

IOUT = 0 mA, HP mode

115

300

µA

IOUT = 0 mA, LP mode

IBUCKIN_LKG Input leakage current BUCK output disabled, Tj = 25 °C

0.01

EFFBCK

Efficiency

VBUCKIN = 5 V, VOUT = 3.3 V,

HP mode, Tj = 50 °C

IOUT = 10 mA

IOUT = 100 mA

IOUT = 600 mA

IOUT = 2500 mA

VOUT-LO

Load transient

regulation (1)

HP mode, 5 mA < IOUT < 2500 mA,

ΔIOUT = 1000 mA, tR = tF = 1µs,

3.0 V < VBUCKIN < 5.5 V, ΔV (in-out) > 1.5 V

LP mode, 0 < IOUT < 50 mA, ΔIOUT = 50 mA, tR = tF = 1 µs

VOUT-LI

Line transient

regulation

ΔVBUCKIN = 600 mV, ΔIOUT = 0, tR = tF = 10 μs, ΔV (in-out) > 1.5 V

STPMIC25

Electrical and timing characteristics

DS14278 - Rev 3

page 23/145

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