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SM8312 데이터시트(PDF) 3 Page - SamHop Microelectronics Corp.

부품명 SM8312
상세설명  150KHz, 2A PWM Buck Switching Regulator
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제조업체  SAMHOP [SamHop Microelectronics Corp.]
홈페이지  http://www.samhop.com.tw
Logo SAMHOP - SamHop Microelectronics Corp.

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SAMHOP Microelectronics Corp.
SM8312
150KHz, 2A PWM Buck Switching Regulator
3
V1.0 May 17 ,2007
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
VCC
Supply Voltage
+45
V
VSD
ON/OFF Pin input voltage
-0.3 to +25
V
VFB
Feedback Pin voltage
-0.3 to +25
V
VOUT
Output voltage to Ground
-1
V
PD
Power dissipation
Internally limited
W
TST
Storage temperature
-65 to +150
oC
TOP
Operating temperature
-40 to +125
oC
VOP
Operating voltage
+4.5 to +25
V
Electrical Characteristics (All Output Voltage Versions)
Unless otherwise specified, VIN=12V for 3.3V, 5V, adjustable version and VIN=24V for the 12V version. ILOAD = 0.2A
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
-50
IB
Feedback bias current
VFB=1.3V
(Adjustable version only)
-10
-100
nA
127
150
173
FOSC
oscillator frequency
110
173
Khz
Fscp
Oscillator frequency of
short circuit protect
When current limit occurred
and VFB <0.55V
30
70
Khz
1.4
VSAT
saturation voltage
IOUT=2A
no outside circuit
VFB=0V force driver on
1.25
1.5
V
Max. Duty Cycle(ON)
VFB=0V force driver on
100
DC
Min. Duty cycle(OFF)
VFB=12V force driver off
0
%
3.3
ICL
current limit
peak current
no outside circuit
VFB=0 force driver on
2.4
2.8
3.6
A
Output = 0V
no outside circuit
VFB=12 force driver off
-200
uA
IL
Output= -1V
Output
leakage
current
VIN=24V
-5
-30
mA
IQ
Quiescent Current
VFB=12 force driver off
5
10
mA
150
ISTBY
Standby Quiescent
Current
ON/OFF pin=5V
VIN=24V
70
200
uA
VIL
Low (regulator ON)
-
0.6
VIH
ON/OFF pin logic input
threshold voltage
High (regulator OFF)
2.0
1.3
-
V
IH
ON/OFF pin logic
input current
VLOGIC=2.5V (OFF)
-0.01
IL
ON/OFF pin input current VLOGIC=0.5V (ON)
-0.1
-1
uA
Tj increasing
175
Ts
Over temperature
shutdown threshold
Tj decreasing
150
oC


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