SAMHOP Microelectronics Corp.
SM8313F
52KHz, 3A PWM Buck Switching Regulator
ꢀ Absolute Maximum Ratings
Symbol
Parameter
Rating
+45
Unit
V
VCC
Supply Voltage
VSD
ON/OFF Pin input voltage
Feedback Pin voltage
Output voltage to Ground
Power dissipation
-0.3 to +25
-0.3 to +25
-1
V
VFB
V
VOUT
PD
V
Internally limited
-65 to +150
-40 to +125
+4.5 to +25
W
oC
oC
V
TST
Storage temperature
Operating temperature
Operating voltage
TOP
VOP
ꢀ 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 = 0.3A
Symbol
Parameter
Conditions
VFB=1.3V
(Adjustable version only)
Min.
Typ.
40
Max.
60
Unit
IB
Feedback bias current
nA
100
58
47
52
FOSC
Fscp
oscillator frequency
Khz
Khz
42
63
Oscillator frequency of When current limit occurred
short circuit protect
19
22
25
and VFB <0.55V
IOUT=3A
no outside circuit
VFB=0V force driver on
1.4
VSAT
DC
ICL
saturation voltage
1.25
V
1.5
Max. Duty Cycle(ON)
Min. Duty cycle(OFF)
VFB=0V force driver on
VFB=12V force driver off
100
0
%
peak current
current limit
no outside circuit
VFB=0 force driver on
no outside circuit
VFB=12 force driver off
4.0
4.5
5.2
A
Output = 0V Output
leakage
-200
-30
uA
IL
Output
-1V
=
current
VIN=24V
-2
5
mA
mA
IQ
ISTBY
VIL
Quiescent Current
VFB=12 force driver off
10
150
200
0.6
Standby Quiescent
Current
ON/OFF pin=5V
VIN=24V
70
uA
Low (regulator ON)
High (regulator OFF)
-
ON/OFF pin logic input
threshold voltage
1.3
V
VIH
2.0
-
ON/OFF pin logic
input current
IH
IL
VLOGIC=2.5V (OFF)
-0.01
-1
uA
oC
ON/OFF pin input current VLOGIC=0.5V (ON)
-0.1
175
150
Tj increasing
Tj decreasing
Over temperature
shutdown threshold
Ts
3
V1.0 May 17 ,2007
SAMHOP [ SAMHOP MICROELECTRONICS CORP. ]
