CRCW25121R00FKTA datasheet(5/26 Pages) VISHAY

Part #	CRCW25121R00FKTA

Description	microBUCK SiC403 6 A, 28 V Integrated Buck Regulator with Programmable LDO

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Manufacturer	VISHAY [Vishay Siliconix]

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Document Number: 66550

S12-0628-Rev. C, 19-Mar-12

www.vishay.com

5

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

For technical support, please contact: analogswitchtechsupport@vishay.com

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.

Fault Protection

ILIM Source Current

ILIM

8µA

Valley Current Limit

RILIM = 6 kVDD = 5 V,

25°C bench testing

4.5

6

7.2

A

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, 25°C bench testing

+ 10

%

Over-Voltage Protection Threshold

VFB with respect to internal 500 mV

reference

+ 20

Over-Voltage Fault Delayb

tOV-Delay

25°C bench testing

5

µs

Over Temperature Shutdownb

TShut

10 °C hysteresis, 25°C bench testing

150

°C

Logic Inputs/Outputs

Logic Input High Voltage

VIH

EN, ENL, PSV

1

V

Logic Input Low Voltage

VIL

0.4

EN/PSV Input Bias Current

IEN

EN/PSV = VDD or AGND

- 10

+ 10

µA

ENL Input Bias Current

IENL

VIN = 28 V

11

18

FBL, FB Input Bias Current

FBL_ILK

FBL, FB = VDD or AGND

- 1

+ 1

Linear Dropout Regulator

FBL Accuracy

FBLACC

VLDO load = 10 mA

0.735

0.750

0.765

V

LDO Current Limit

LDO_ILIM

Start-up and foldback, VIN = 12 V

115

mA

Operating current limit, VIN = 12 V

134

200

VLDO to VOUT Switch-Over Threshold

c

VLDO-BPS

- 130

+ 130

mV

VLDO to VOUT Non-Switch-Over Threshold

c

VLDO-NBPS

- 500

+ 500

VLDO to VOUT Switch-Over Resistance

RLDO

VOUT = 5 V

2



LDO Drop Out Voltaged

From VIN to VVLDO, VVLDO = + 5 V,

IVLDO = 100 mA

1.2

V

ELECTRICAL SPECIFICATIONS

Parameter

Symbol

Test Conditions Unless Specified

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

- 40 °C to + 85 °C for min. and max.,

TJ = < 125 °C

Min.

Typ.

Max.

Unit

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