STW4810 datasheet(46/72 Pages) STMICROELECTRONICS

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5 Electrical and timing characteristics

STw4810

46/72

Rev3

5.3.3

VCORE DC/DC step-down converter

Table 37.

VCORE DC/DC step-down converter

Symbol

Description

Test conditions

Min.

Typ.

Max.

Units

VCORE Regulator in Normal Mode (SLEEP = ‘0’) / Otherwise specified; VCORE = 1.2 V

VBAT

Input power supply

Battery voltage

2.7

3.6

4.8

VRIPPLE

Output voltage

ripple

mVpp

VOUT

Programmable

output voltage

VCORE_SEL[3:0]

1111

1110

1101

1100

1011

1010

1001

1000

0111

0110

0101

0100 (default)

0011

0010

0001

0000

-3.7%

-4.25%

-5%

1.50

1.40

1.38

1.36

1.34

1.32

1.30

1.28

1.26

1.24

1.22

1.20

1.15

1.10

1.05

1.00

+3.7%

+4.25%

+5%

IOUT

Output current

600

PEFF

Power efficiency

VBAT = 3.6 V

IOUT = 200 mA

LIR

Line regulation

VBAT: [2.7; 4.8]V

LDR

(1)

Load regulation

IOUT: [0.1; 600] mA

ISHORT

Short circuit current

limitation

0.9

1.2

1.4

Quiescent current

IOUT = 0 mA

130

250

µA

ILKG

Power-down

current

‘en_vcore’ = 0

µA

PSRR(1)

Power supply

rejection

Vpp = 0.3 V

[0; 20] kHz

LIRT

Transient line

regulation

∆VBAT = 300 mV

tR = tF = 10 µs

7mV

LDRT

Transient load

regulation

IOUT = [1; 600] mA

tR = tF = 100 ns

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