LM1583
LM1583
3A, 23V, 385KHz Step-Down Converter
DESCRIPTION
FEATURES
The LM1583 is a step-down regulator with a
built-in internal Power MOSFET. It achieves 3A
of continuous output current over a wide input
supply range with excellent load and line
regulation.
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3A Output Current
Programmable Soft-Start
100mΩ Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic Capacitors
Up to 95% Efficiency
20μA Shutdown Mode
Fixed 385KHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75V to 23V Operating Input Range
Output Adjustable from 1.22V to 21V
Under-Voltage Lockout
Current mode operation provides fast transient
response and eases loop stabilization.
Fault
condition
protection
includes
cycle-by-cycle current limiting and thermal
shutdown. An adjustable soft-start reduces the
stress on the input source at startup. In
shutdown mode the regulator draws 20μA of
supply current.
APPLICATIONS
The LM1583 requires a minimum number of
external components, providing a compact
solution.
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Distributed Power Systems
Battery Chargers
Pre-Regulator for Linear Regulators
TOP VIEW
SOIC8/PDIP8
BS
IN
1
2
3
4
8
7
6
5
SS
EN
SW
GND
COMP
FB
EXPOSED PAD
(SOIC8E ONLY)
CONNECT TO PIN 4
ORDERING INFORMATION
Part Number*
LM1583M
LM1583ME
LM1583P
Package
Top Marking
LM1583M
LM1583ME
LM1583P
Free Air Temperature (TA)
–40°C to +85°C
SOIC8
SOIC8E
PDIP8
–40°C to +85°C
–40°C to +85°C
TYPICAL APPLICATION
Efficiency Curve
C5
INPUT
V
= 10V
IN
6.5V to 23V
100
90
80
70
60
50
10nF
2
1
L1
V
=5.0V
OUT
15μ H
IN
BS
OUTPUT
5.0V
7
3
5
OPEN =
EN
SW
AUTOMATIC
3A
LM1583
STARTUP
30.9kΩ
C1
8
SS
GND
FB
V
=2.5V
10μ F
CERAMIC
OUT
COMP
R1
C2
22μ F
CERAMIC
4
6
V
=3.3V
D1
OUT
10kΩ
C3
4.7nF
R3
7.5kΩ
C4
10nF
R2
C6
NS
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5
LOAD CURRENT (A)
地址: 南京市珠江路 88 号,新世界中心 B 座 4004 室, 邮编:210008
ADD.: RM. 4004, BLOCK B, NEW WORLD CENTER, NO. 88 ZHUJIANG ROAD, NANJING 210008, CHINA
电话(TEL.): (86)-25-68853600 传真(FAX): (86)-25-68853600-810
WEB-SITE: WWW.HN-ELEC.COM
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