SIC403 datasheet(5/25 Pages) VISHAY

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Document Number: 66550

S11-1638-Rev. B, 15-Aug-11

www.vishay.com

Vishay Siliconix

SiC403

This document is subject to change without notice.

THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

Notes:

a. VIN UVLO is programmable using a resistor divider from VIN to ENL to AGND. The ENL voltage is compared to an internal reference.

b. Guaranteed by design.

c. The switch-over threshold is the maximum voltage diff erential between the VLDO and VOUT pins which ensures that VLDO will internally

switch-over to VOUT. The non-switch-over threshold is the minimum voltage diff erential between the VLDO and VOUT pins which ensures that

VLDO will not switch-over to VOUT.

d. The LDO drop out voltage is the voltage at which the LDO output drops 2 % below the nominal regulation point.

Power Good On-Resistance

PG_RDS-ON

VEN = 0 V



Fault Protection

ILIM Source Current

ILIM

8µA

Valley Current Limit

RILIM = 6 kVDD = 5 V

Output Under-Voltage Fault

VOUV_Fault

VFB with respect to Internal 500 mV

reference, 8 consecutive clocks

- 25

Smart Power-Save Protection

Threshold Voltageb

PSAVE_VTH

VFB with respect to internal 500 mV

reference

+ 10

Over-Voltage Protection Threshold

VFB with respect to internal 500 mV

reference

+ 20

Over-Voltage Fault Delayb

tOV-Delay

5µs

Over Temperature Shutdownb

TShut

10 °C hysteresis

150

°C

Logic Inputs/Outputs

Logic Input High Voltage

VIN+

EN, ENL, PSV

Logic Input Low Voltage

VIN-

0.4

EN/PSV Input Bias Current

IEN-

EN/PSV = VDD or AGND

- 10

+ 10

µA

ENL Input Bias Current

VIN = 28 V

FBL, FB Input Bias Current

FBL_ILK

FBL, FB = VDD or AGND

- 1

+ 1

Linear Dropout Regulator

VLDO Accuracy

VLDOACC

VLDO load = 10 mA

4.85

5.15

LDO Current Limit

LDO_ILIM

Start-up and foldback, VIN = 12 V

Operating current limit, VIN = 12 V

134

200

VLDO to VOUT Switch-Over Threshold

VLDO-BPS

- 50

+ 50

VLDO to VOUT Non-Switch-Over Threshold

VLDO-NBPS

- 550

+ 550

VLDO to VOUT Switch-Over Resistance

RLDO

VOUT = 5 V



LDO Drop Out Voltaged

From VIN to VVLDO, VVLDO = + 5 V,

IVLDO = 100 mA

1.2

ELECTRICAL SPECIFICATIONS

Parameter

Symbol

Test Conditions Unless Specified

VIN = 12 V, VDD = 5 V, TA = + 25 °C for typ.,

- 25 °C to + 85 °C for min. and max.,

TJ = < 125 °C

Min.

Typ.

Max.

Unit

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