HTC LM1501BT-5.0-5L 5.0a, 300khz, step-down switching regulator Datasheet

5.0A, 300kHz, Step-down Switching Regulator
LM1501B
FEATURES
z 3.3V, 5V, 12V, and adjustable output versions
z Adjustable version output voltage range, 1.23V to 37V
± 3% max over line and load conditions
z Guaranteed 5A output load current
z Input voltage range up to 40V
z Requires only 4 external components
z 300kHz ±15% fixed frequency internal oscillator
z Excellent line and load regulation specifications
z Low power standby mode, IQ typically 80uA
z Thermal shutdown and current limit protection
TO-263 PKG
TO-220 PKG
APPLICATION
z Simple high-efficiency step-down regulator
z On-card switching regulators
z Positive to negative converter
Ordering Information
Device
LM1501BR-X.X
LM1501BT-X.X
PKG
TO-263 5L
TO-220 5L
X.X = Output Voltage = 3.3, 5.0, 12, ADJ
DESCRIPTION
The LM1501B series of regulators are monolithic integrated circuits that provide all the active functions for a
step-down switching regulator, capable of driving a 5A load with excellent line and load regulation. These
devices are available in fixed output voltages of 3.3V, 5V, 12V and an adjustable output version. Requiring a
minimum number of external components, these regulators are simple to use. The LM1501B series operates at
a switching frequency of 300kHz. Available in standard 5-lead TO-263 and TO-220 packages.
Other features include a guaranteed ±3% tolerance on output voltage under specified input voltage and output
load conditions, and ± 15% on the oscillator frequency. External shutdown is included, featuring typically 80uA
standby current. Self protection features include a current limit for output switch and an over temperature
shutdown for complete protection under fault conditions. The over temperature shutdown level is about 145℃
with 5℃ hysteresis.
Absolute Maximum Ratings (TA = 25oC) (Note 1)
Characteristic
Maximum Input Supply Voltage
ON/OFF Pin Input Voltage
Feedback Pin Voltage
Output Voltage to Ground
Power Dissipation
Storage Temperature Range
Operating Temperature Range
ESD Susceptibility (Human Body Model)
Operating Supply Voltage
Symbol
Value
Unit
VI
VIN
VFB
VO
PD
Tstg
TJ
VESD
VIN
45
-0.3 ≤ V ≤ +25
-0.3 ≤ V ≤ +25
-1
Internally limited
-65 to +150
-40 ≤ TJ ≤ +125
2
4.5 to 45
V
V
V
V
W
o
C
o
C
kV
V
Note 1. Absolute Maximum Rating indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test
conditions, see the Electrical Characteristics.
Mar. 2011 – Ver. 1.2
1
HTC
5.0A, 300kHz, Step-down Switching Regulator
LM1501B
Ordering Information
VOUT
ADJ
3.3V
5.0V
12V
Package
Order No.
Description
Package Marking
Supplied As
TO-263 5L
LM1501BR-ADJ-5L
5A, 300kHz
LM1501B-ADJ
Reel
TO-220 5L
LM1501BT-ADJ-5L
5A, 300kHz
LM1501B-ADJ
Tube
TO-263 5L
LM1501BR-3.3-5L
5A, 300kHz
LM1501B-3.3
Reel
TO-220 5L
LM1501BT-3.3-5L
5A, 300kHz
LM1501B-3.3
Tube
TO-263 5L
LM1501BR-5.0-5L
5A, 300kHz
LM1501B-5.0
Reel
TO-220 5L
LM1501BT-5.0-5L
5A, 300kHz
LM1501B-5.0
Tube
TO-263 5L
LM1501BR-12-5L
5A, 300kHz
LM1501B-12
Reel
TO-220 5L
LM1501BT-12-5L
5A, 300kHz
LM1501B-12
Tube
LM 1501B R – 3.3 V – 5 L
Lead Count : 5L
Output Voltage : ADJ / 3.3V / 5.0V / 12V
Package Type
R : TO-263
T : TO-220
Root Name
Product Code
PIN CONFIGURATION
SD
FB
GND
OUTPUT
VIN
SD
FB
GND
OUTPUT
VIN
TO-263 5L
TO-220 5L
PIN DESCRIPTION
Pin No.
Mar. 2011 – Ver. 1.2
TO-263 / TO-220 5 LEAD
Name
Function
1
VIN
Operating Input Voltage
2
OUTPUT
Switching Output Voltage
3
GND
Ground
4
FB
Output Voltage Feedback Control
5
SD
ON/OFF Shutdown
2
HTC
5.0A, 300kHz, Step-down Switching Regulator
LM1501B
Electrical Characteristics
Unless otherwise specified, TJ=25℃ VIN= 12V for the 3.3V, 5V, and Adjustable version and VIN = 24V for the 12V
version. ILOAD = 500mA.
Characteristic
Efficiency
Symb
ol
η
Test Condition
VOUT
Typ
LM1501B -ADJ
VOUT = 3V, ILOAD = 5A
73
LM1501B-3.3
VIN = 12V, ILOAD = 5A
73
LM1501B-5
VIN = 12V, ILOAD = 5A
80
LM1501B-12
VIN = 25V, ILOAD = 5A
90
4.75V≤VIN≤40V
LM1501B-3.3
Output Voltage
Min
0.2A≤ILOAD≤5A
7V≤VIN≤40V
LM1501B-5
0.2A≤ILOAD≤5A
15V≤VIN≤40V
LM1501B-12
0.2A≤ILOAD≤5A
Max
Unit
%
3.20
3.3
3.40
4.85
5
5.15
11.64
12
12.36
1.180
1.215
1.250
255
300
345
kHz
15
50
nA
1.4
V
V
4.5V≤VIN≤40V
Feedback Voltage
VFB
0.2A≤ILOAD≤5A
LM1501B-ADJ
VOUT programmed for 3V
Oscillator Frequency
fO
Feedback Bias Current
ID
Saturation Voltage
Max Duty Cycle (ON)
Max Duty Cycle (OFF)
Current Limit
Output
Leakage Current
VSAT
DC
ICL
LM1501B-ADJ; VFB=1.215V
IOUT = 5A, (Note 2, 3)
(Note 3)
100
(Note 4)
0
Peak Current, (Note 2, 3)
6.5
Output = 0V (Note 2, 4)
IL
Quiescent Current
IQ
Standby Quiescent
Current
ISTBY
%
A
50
μA
2
30
mA
(Note 4)
4.5
10
mA
ON/OFF pin = 5V(OFF), VIN = 40V
80
200
μA
0.6
V
Output = -1V, VIN=40V
1.3
ON/OFF Pin Logic Input
Threshold voltage
ON/OFF Pin Logic Input
current
VIH
Low (Regulator ON)
VIL
High (Regulator OFF)
IH
VLOGIC = 2.5V (regulator OFF)
IL
VLOGIC = 0.5V (regulator ON)
2.0
5
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
5.0A, 300kHz, Step-down Switching Regulator
LM1501B
TYPICAL APPLICATION
LM1501B-5.0
TYPICAL OPERATING CHARACTERISTICS
T.B.D
APPLICATION INFORMAION
T.B.D
Mar. 2011 – Ver. 1.2
4
HTC
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