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SIC424 Datasheet(PDF) 5 Page - Vishay Siliconix

Part # SIC424
Description  6 A, microBUCK SiC414, SiC424 Integrated Buck Regulator with 5 V LDO
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Manufacturer  VISHAY [Vishay Siliconix]
Direct Link  http://www.vishay.com
Logo VISHAY - Vishay Siliconix

SIC424 Datasheet(HTML) 5 Page - Vishay Siliconix

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Document Number: 63388
S13-0248-Rev. B, 04-Feb-13
www.vishay.com
5
Vishay Siliconix
SiC414, SiC424
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 questions, contact: powerictechsupport@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 differential 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 differential 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
Power Good Threshold Voltage
PG_VTH_UPPER
Upper limit, VFB > internal reference 750 mV
+ 20
%
Lower limit, VFB < internal reference 750 mV
- 10
Start-Up Delay Time
(between PWM enable and PGOOD high)
PG_Td
V5V = 5 V
4
ms
V5V = 3 V
2
Fault (noise-immunity) Delay Timeb
PG_ICC
5µs
Power Good Leakage Current
PG_ILK
1µA
Power Good On-Resistance
PG_RDS-ON
10
Fault Protection
Valley Current Limit
V5V = 5 V, RILIM = 5 k
34
5
A
ILIM Source Current
ILIM
8µA
ILIM Comparator Offset Voltage
VILM-LK
With respect to AGND
- 8
0
+ 8
mV
Output Under-Voltage Fault
VOUV_Fault
VFB with respect to Internal 750 mV
reference, 8 consecutive clocks
- 25
%
Smart Power-Save Protection
Threshold Voltageb
PSAVE_VTH
VFB with respect to internal 750 mV
reference
+ 10
Over-Voltage Protection Threshold
VFB with respect to internal 750 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
VIH
ENL
1
V
Logic Input Low Voltage
VIL
0.4
EN/PSV
Input for PSAVE Operationb
% of V5V
45
100
%
EN/PSV
Input for Forced Continuous Operationb
1V
42
EN/PSV Input for Disabling Switcher
00.4
V
EN/PSV Input Bias Current
IEN
EN/PSV = V5V or AGND
- 10
+ 10
µA
ENL Input Bias Current
VIN = 28 V
11
18
FB Input Bias Current
FBL_ILK
FB = V5V or AGND
- 1
+ 1
Linear Dropout Regulator
VLDO Accuracy
VLDO_ACC
VLDO load = 10 mA
4.9
5
5.1
V
LDO Current Limit
LDO_ILIM
Start-up and foldback, VIN = 12 V
115
mA
Operating current limit, VIN = 12 V
135
200
VLDO to VOUT Switch-Over Threshold
c
VLDO-BPS
- 140
+ 140
mV
VLDO to VOUT Non-Switch-Over Threshold
c
VLDO-NBPS
- 450
+ 450
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, V5V = 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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