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UD38251G-SH2-R Fiches technique(PDF) 3 Page - Unisonic Technologies

No de pièce UD38251G-SH2-R
Description  Cycle-by-Cycle Over Current Protection
PDF  7 Pages
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Fabricant  UTC [Unisonic Technologies]
Site Internet  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UD38251G-SH2-R Fiches technique(HTML) 3 Page - Unisonic Technologies

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UD38251
CMOS IC
UNISONICTECHNOLOGIESCO.,LTD
3 of 7
www.unisonic.com.tw
QW-R115-007.B
ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VIN
-0.3 ~ +42
V
Switch Node Voltage
VSW
-0.3 ~ VIN+0.3
V
Boost Voltage
VBS
VSW-0.3 ~ VSW+ 6
V
All Other Pins Voltage
-0.3 ~ +6
V
Lead Temperature
TL
260
°C
Junction Temperature
TJ
150
°C
Storage Temperature
TSTG
-65 ~ +150
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
RATINGS
UNIT
Input Supply Voltage
VIN
8 ~ 38
V
Output Voltage
VOUT
VFB ~ 20
V
Ambient Temperature
TA
-40 ~ +85
°C
THERMAL CHARACTERISTICS
PARAMETER
SYMBOL
RATINGS
UNIT
Junction To Ambient
θJA
40
°C/W
Junction to Case
θJC
15
°C/W
Note: θJA is measured with the PCB copper area of approximately 1 in
2(Multi-layer). That need connect to exposed
pad.
ELECTRICAL CHARACTERISTICS (VIN=12V, TA=25°C, unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input Voltage Range
VIN
8
38
V
Shutdown Supply Current
ISD
VEN= 0V
0.7
1.3
mA
Quiescent Current
ICCQ
VEN=5.0V, VFB=1.05V
0.7
1.5
mA
Feedback Voltage
VFB
8V≤VIN≤38V
0.98
1.00
1.02
V
Feedback Overvoltage Threshold
OVP_FB
1.1X
VFB
High-Side Switch On Resistance (Note)
RDS(ON)_1
150
mΩ
Low-Side Switch On Resistance (Note)
RDS(ON)_2
140
mΩ
High-Side Switch Leakage Current
VEN=0V, VSW=0V
10
μA
Upper Switch Current Limit
Minimum Duty Cycle
2.9
3.5
A
Lower Switch Current Limit
From Drain to Source
0.9
A
Oscillation Frequency
FOSC1
160
KHz
Short Circuit Oscillation Frequency
FOSC2
VFB=<0.5V
60
KHz
Maximum Duty Cycle
DMAX
90
%
Minimum On Time (Note)
TON_MIN
220
ns
EN Lockout Threshold Voltage
ENH_LOCK
2.5
V
EN Lockout Hysterisis
210
mV
Input Under Voltage Lockout Threshold
UVLO
VIN Rising
6.5
7.0
7.5
V
Input Under Voltage Lockout Threshold
Hysteresis
UVLO-Hys
800
mV
Input Over Voltage Lockout Threshold
OVLO
VIN Rising
40
V
Input Over Voltage Lockout Threshold
Hysteresis
OVLO-Hys
5
V
Soft-Start Period
3
ms
Thermal Shutdown
TSD
150
°C
Thermal Shutdown Hysterisis
TSH
30
°C
Note: Guaranteed by design.



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