Document Number: 69062
S10-1367-Rev. D, 14-Jun-10
www.vishay.com
5
Vishay Siliconix
SiC417
Notes:
a.V
IN UVLO
is programmable using a resistor divider from V
IN
to ENL to A
GND
. 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 V
LDO
and V
OUT
pins which ensures that V
LDO
will internally
switch-over to V
OUT
. The non-switch-over threshold is the minimum voltage diff erential between the V
LDO
and V
OUT
pins which ensures that
V
LDO
will not switch-over to V
OUT
.
d.The LDO drop out voltage is the voltage at which the LDO output drops 2 % below the nominal regulation point.
ELECTRICAL CHARACTERISTICS
Fault Protection
I
LIM
Source Current
I
LIM
10
礎(chǔ)
Valley Current Limit
R
ILIM
= 5.9 k?/DIV>
6    8   10   A
I
LIM
Comparator Offset Voltage
V
ILM-LK
With respect to A
GND
- 10   0   + 10  mV
Output Under-Voltage Fault
V
OUV_Fault
V
FB
with respect to Internal 500 mV reference,
8 consecutive clocks
- 25
%
Smart Power-Save Protection
Threshold Voltage
b
P
SAVE_VTH
V
FB
with respect to internal 500 mV reference
+ 10
%
Over-Voltage Protection Threshold
V
FB
with respect to internal 500 mV reference
+ 20
Over-Voltage Fault Delay
b
t
OV-Delay
5
祍
Over Temperature Shutdown
b
T
Shut
10 癈 hysteresis
150
癈
Logic Inputs/Outputs
Logic Input High Voltage
V
IN+
EN, ENL, PSV
2
V
Logic Input Low Voltage
V
IN-
0.4
EN/PSV Input Bias Current
I
EN-
EN/PSV = V5V or A
GND
- 10
+ 10
礎(chǔ)
ENL Input Bias Current
V
IN
= 28 V
11   18
FBL, FB Input Bias Current
FBL_I
LK
FBL, FB = V5V or A
GND
- 1
+ 1
Linear Dropout Regulator
FBL Accuracy
FBL
ACC
V
LDO
load = 10 mA
0.735  0.75  0.765   V
LDO Current Limit
LDO_I
LIM
Start-up and foldback, V
IN
= 12 V
85
mA
Operating current limit, V
IN
= 12 V
135  200
V
LDO
to V
OUT
Switch-Over Threshold
c
V
LDO-BPS
- 140
+ 140
mV
V
LDO
to V
OUT
Non-Switch-Over Threshold
c
V
LDO-NBPS
- 450
+ 450
V
LDO
to V
OUT
Switch-Over Resistance
R
LDO
V
OUT
= 5 V
2
?/DIV>
LDO Drop Out Voltage
d
From V
IN
to V
VLDO
, V
VLDO
= + 5 V,
I
VLDO
= 100 mA
1.2
V
ELECTRICAL SPECIFICATIONS
Parameter
Symbol
Test Conditions Unless Specified
V
IN
= 12 V, V5V = 5 V, T
A
= + 25 癈 for typ.,
- 25 癈 to + 85 癈 for min. and max.,
T
J
= < 125 癈
Min.   Typ.  Max.  Unit
Efficiency vs. Output Current (V
OUT
= 1.2 V)
I
OUT
(A)
50
55
60
65
70
75
80
85
90
95
100
0   1   2   3   4   5   6   7   8   9  10
V
IN
=9 V
V
IN
=19 V
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