SM8303 Datasheet, PDF (3/11 Pages) SamHop Microelectronics Corp. – 150KHz, 3A PWM Buck Switching Regulator

SAMHOP Microelectronics Corp.
150KHz, 3A PWM Buck Switching Regulator
SM8303
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
V_CC
Supply Voltage
+35
V
V_SD
ON/OFF Pin input voltage
-0.3 to +25
V
V_FB
Feedback Pin voltage
-0.3 to +25
V
V_OUT
Output voltage to Ground
-1
V
P_D
Power dissipation
Internally limited
W
T_ST
Storage temperature
-65 to +150
o_C
T_OP
Operating temperature
-40 to +125
o_C
V_OP
Operating voltage
+4.5 to +25
V
Electrical Characteristics (All Output Voltage Versions)
Unless otherwise specified, V_IN=12V for 3.3V, 5V, adjustable version and V_IN=24V for the 12V version. I_LOAD = 0.3A
Symbol
Parameter
Conditions
Min. Typ. Max.
I_B
Feedback bias current
V_FB=1.3V
(Adjustable version only)
60
40
100
F_OSC oscillator frequency
V_SAT saturation voltage
Max. Duty Cycle(ON)
DC
Min. Duty cycle(OFF)
I_CL current limit
Output = 0V ^Output
I_L
leakage
Output= -1V current
I_OUT=3A
no outside circuit
V_FB=0V force driver on
V_FB=0V force driver on
V_FB=12V force driver off
peak current
no outside circuit
V_FB=0 force driver on
no outside circuit
V_FB=12 force driver off
V_IN=32V
127
150
173
110
173
1.4
1.3
1.5
100
0
5.5
3.6
4.5
6.5
200
2
60
I_Q
I_STBY
Quiescent Current
Standby Quiescent
Current
V_FB=12 force driver off
ON/OFF pin=5V
V_IN=24V
5
10
250
150
300
V_IL
Low (regulator ON)
ON/OFF pin logic input
V_IH ^{threshold voltage}
High (regulator OFF)
-
0.6
1.3
2.0
-
I_H
ON/OFF pin logic
input current
V_LOGIC=2.5V (OFF)
I_L
ON/OFF pin input current V_LOGIC=0.5V (ON)
Θ_JC Thermal Resistance
TO220-5L _{Junction to}
TO263-5L ^case
Thermal Resistance
Θ_JA With copper area of
approximately 3 in²
TO220-5L _{Junction to}
TO263-5L ^ambient
15
25
0.02
5
2.5
3.5
28
23
Unit
nA
Khz
V
%
A
uA
mA
mA
uA
V
uA
o_C/W
o_C/W
3
V1.0 May 17 ,2007