5.0A, 300kHz, Step-down Switching Regulator
Electrical Characteristics
LM1501B
Unless otherwise specified, T
J
=25℃ V
IN
= 12V for the 3.3V, 5V, and Adjustable version and V
IN
= 24V for the 12V
version. I
LOAD
= 500mA.
Characteristic
Symb
ol
Test Condition
LM1501B -ADJ
Min
Typ
73
73
80
90
Max
Unit
V
OUT
= 3V, I
LOAD
= 5A
V
IN
= 12V, I
LOAD
= 5A
V
IN
= 12V, I
LOAD
= 5A
V
IN
= 25V, I
LOAD
= 5A
4.75V≤V
IN
≤40V
0.2A≤I
LOAD
≤5A
7V≤V
IN
≤40V
0.2A≤I
LOAD
≤5A
15V≤V
IN
≤40V
0.2A≤I
LOAD
≤5A
4.5V≤V
IN
≤40V
0.2A≤I
LOAD
≤5A
V
OUT
programmed for 3V
3.20
4.85
11.64
Efficiency
η
LM1501B-3.3
LM1501B-5
LM1501B-12
LM1501B-3.3
%
3.3
5
12
3.40
5.15
12.36
V
Output Voltage
V
OUT
LM1501B-5
LM1501B-12
Feedback Voltage
Oscillator Frequency
Feedback Bias Current
Saturation Voltage
Max Duty Cycle (ON)
Max Duty Cycle (OFF)
Current Limit
Output
Leakage Current
Quiescent Current
Standby Quiescent
Current
ON/OFF Pin Logic Input
Threshold voltage
V
FB
f
O
I
D
V
SAT
DC
I
CL
I
L
I
Q
I
STBY
LM1501B-ADJ
1.180
255
1.215
300
15
1.250
345
50
1.4
kHz
nA
V
%
A
50
μA
mA
mA
μA
LM1501B-ADJ; V
FB
=1.215V
I
OUT
= 5A, (Note 2, 3)
(Note 3)
(Note 4)
Peak Current, (Note 2, 3)
Output = 0V (Note 2, 4)
Output = -1V, V
IN
=40V
(Note 4)
ON/OFF pin = 5V(OFF), V
IN
= 40V
100
0
6.5
2
4.5
80
1.3
30
10
200
V
IH
V
IL
Low (Regulator ON)
High (Regulator OFF)
V
LOGIC
= 2.5V (regulator OFF)
V
LOGIC
= 0.5V (regulator ON)
2.0
5
0.6
V
ON/OFF Pin Logic Input
current
I
H
I
L
15
5
uA
Note 2. No elements connected to output pin
Note 3. Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 4. Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the A version, and 15V for the 12V version. To force the
output transistor switch OFF
Mar. 2011 – Ver. 1.2
3
HTC
HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
