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Document Number: 69062
S10-1367-Rev. D, 14-Jun-10
Vishay Siliconix
SiC417
Notes:
a. This device is ESD sensitive. Use of standard ESD handling precautions is required.
b. Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters
specififed in the Electrical Characteristicsw section is not recommended.
Thermal Resistance, Junction-to-Ambient
b
High-Side MOSFET
Low-Side MOSFET
PWM Controller and LDO Thermal Resistance
25
20
50
癈/W
Peak IR Reflow Temperature
T
Reflow
-
260
癈
THERMAL RESISTANCE RATINGS
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
Input Supplies
V
IN
Input Voltage
V
IN
3
28
V
V5V Voltage
V5V
4.5
5.5
V
IN
UVLO Threshold Voltage
a
V
IN_UV+
Sensed at ENL pin, rising edge
2.4   2.6  2.95
V
IN_UV-
Sensed at ENL pin, falling edge
2.235  2.4  2.565
V
IN
UVLO Hysteresis
V
IN_UV_HY
EN/PSV = High
0.2
V5V UVLO Threshold Voltage
V
5V_UV+
Measured at V5V pin, rising edge
3.7   3.9   4.1
V
5V_UV-
Measured at V5V pin, falling edge
3.5   3.6  3.75
V5V UVLO Hysteresis
V
5V_UV_HY
0.3
V
IN
Supply Current
I
IN
EN/PSV, ENL = 0 V, V
IN
= 28 V
8.5   20
礎(chǔ)
Standby mode:
ENL = V5V, EN/PSV = 0 V
130
V5V Supply Current
I
5V
EN/PSV, ENL = 0 V
3    7
EN/PSV = V5V, no load (f
SW
= 25 kHz),
V
FB
> 500 mV
b
2
mA
f
SW
= 250 kHz, EN/PSV = floating, no load
b
10
Controller
F
B
On-Time Threshold
V
FB-TH
Static V
IN
and load, - 40 癈 to + 85 癈   0.495  0.5  0.505   V
Frequency Range
F
PWM
continuous mode
200
1000  kHz
Bootstrap Switch Resistance
10
?/DIV>
Timing
On-Time
t
ON
Continuous mode operation V
IN
= 15 V,
V
OUT
= 5 V, f
SW
= 300 kHz, R
ton
= 133 k?/DIV>
999  1110  1220
ns
Minimum On-Time
b
t
ON
50
Minimum Off-Time
b
t
OFF
250
Soft Start
Soft Start Time
b
t
SS
I
OUT
= I
LIM
/2
0.85
ms
Analog Inputs/Outputs
V
OUT
Input Resistance
R
O-IN
500
k?/DIV>
Current Sense
Zero-Crossing Detector Threshold Voltage  V
Sense-th
LX-P
GND
- 3   0   + 3   mV
Power Good
Power Good Threshold Voltage
PG_V
TH
Internal reference 500 mV
- 10 %
+ 20 %  V
Start-Up Delay Time
PG_T
d
V
EN
= 0 V
2
ms
Fault (noise-immunity) Delay Time
b
PG_I
CC
V
EN
= 0 V
5
祍
Power Good Leakage Current
PG_I
LK
V
EN
= 0 V
1   礎(chǔ)
Power Good On-Resistance
PG_R
DS-ON
V
EN
= 0 V
10
?/DIV>
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