STW4510 datasheet(40/57 Pages) STMICROELECTRONICS

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STw4510

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4.2.5

LDO regulators

Vana1 and Vana3 low drop regulators have the same characteristics, the parameters given

Table 20 are applicable to both regulators, in Table 20, Vana(i) stands for Vana3 with the

new design to reach 3.3V maximum voltage output.

Vana1

Table 20.

LDO regulators - Vana 1

Symbol

Description

Test conditions

Min.

Typ.

Max.

Units

Vana(i) regulator in high power mode (pdn_vana1 = 1, SLEEP = ‘0’)

VBAT

Input power supply

Vana1 =

1.5 V/1.8 V/ 2.5 V

2.7

3.6

5.5

Vana1 = 2.8 V

3.6

5.5

VOUT

Output voltage

Vana1_sel[1:0]pads

-3 %

1.5

1.8

2.5

2.8

+3 %

IOUT

Output current

150

ISHORT

(1)

Short-circuit limitation

230

340

550

(2)

Quiescent current

IOUT = 0 mA

µA

ILKG

Power-down current

µA

PSRR(1)

Power supply rejection

Vana1 = 2.8 V

IOUT = 150 mA

Vpp = 0.3 V,

F: [0; 20] kHz

Vana1 = 2.8 V

IOUT = 10 mA

Vpp = 0.3 V,

F: [0; 10] kHz

F: [10; 100] kHz

Rising time

(10 % to 90 %)

Vana1 = 2.8 V

IOUT = 10 mA

1.5

Lir

Line regulation

VBAT: [2.7; 5.5] V

Ldr

Load regulation

IOUT= [0.1; 150] mA

Lirt

Transient line regulation

Vana1 = 2.8 V

IOUT = 150 mA

VBAT= [3.0; 3.3] V

tR = tF = 10 µs

2mV

Ldrt

Transient load regulation

Vana1 = 2.8 V

IOUT= [1; 150] mA

tR = tF = 1 µs

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