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MP1593DN-LF-Z

P1-P3P4-P6P7-P9P10-P12P13-P13
MP1593
3A, 28V, 385kHz
Step-Down Converter
MP1593 Rev. 2.11 www.MonolithicPower.com 1
1/10/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP1593 is a step-down regulator with an
internal Power MOSFET. It achieves 3A of
continuous output current over a wide input
supply range with excellent load and line
regulation.
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.
The MP1593 requires a minimum number of
readily available external components,
providing a compact solution.
EVALUATION BOARD REFERENCE
Board Number Dimensions
EV1593DN-00A 2.1”X x 1.3”Y x 0.4”Z
FEATURES
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 28V Operating Input Range
Output Adjustable from 1.22V
Under-Voltage Lockout
Available in 8-Pin SOIC Package
APPLICATIONS
Distributed Power Systems
Battery Chargers
Pre-Regulator for Linear Regulators
Flat Panel TVs
Set-Top Boxes
Cigarette Lighter Powered Devices
DVD/PVR Devices
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.75V to 28V
OUTPUT
3.3V
3A
C1
10μ F/35V
CERAMIC
x2
C2
22μ F/6.3V
CERAMIC
x2
C4
0.1μ F
C3
8.2nF
D1
B340A
C5
10nF
L1
10μ H
4A
R3
5.6kΩ
R2
10kΩ
1%
R1
16.9kΩ
1%
MP1593
BSIN
FB
SW
SS
GND COMP
EN
C6
(optional)
1
3
5
6
4
8
7
2
OFF ON
EFFICIENCY (%)
100
95
90
85
80
75
70
65
60
55
50
LOAD CURRENT (A)
Efficiency vs
Load Current
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
V
IN
= 9V
V
IN
= 12V
V
IN
= 24V
MP1593 – 3A, 28V, 385kHz STEP-DOWN CONVERTER
MP1593 Rev. 2.11 www.MonolithicPower.com 2
1/10/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking Free Air Temperature (T
A
)
MP1593DN SOIC8E MP1593DN
-40C to +85C
* For Tape & Reel, add suffix –Z (e.g. MP1593DN–Z).
For RoHS Compliant packaging, add suffix –LF (e.g. MP1593DN–LF–Z)
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage V
IN
........................-0.3V to +30V
Switch Voltage V
SW
...............-0.5V to V
IN
+ 0.3V
Boost Voltage V
BS
..........V
SW
– 0.3V to V
SW
+ 6V
All Other Pins..................................-0.3V to +6V
Continuous Power Dissipation (T
A
= +25°C)
(2)
………………………………………………....2.5W
Junction Temperature...............................150C
Lead Temperature ....................................260C
Storage Temperature .............. -65°C to +150C
Recommended Operating Conditions
(3)
Input Voltage V
IN
............................4.75V to 28V
Operating Junct. Temp (T
J
)........-40C to +125C
Thermal Resistance
(4)
θ
JA
θ
JC
SOIC8E (Exposed Pad) ..........50 ...... 10 ... C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature T
J
(MAX), the junction-to-
ambient thermal resistance θ
JA
, and the ambient temperature
T
A
. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by P
D
(MAX) = (T
J
(MAX)-T
A
)/θ
JA
. Exceeding the maximum allowable powe
r
dissipation will cause excessive die temperature, and the
regulator will go into thermal shutdown. Internal thermal
shutdown circuitry protects the device from permanent
damage.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on JESD51-7, 4-layer PCB.
BS
IN
SW
GND
SS
EN
COMP
FB
1
2
3
4
8
7
6
5
TOP VIEW
EXPOSED PAD
ON BACKSIDE
CONNECT TO PIN 4
MP1593 – 3A, 28V, 385kHz STEP-DOWN CONVERTER
MP1593 Rev. 2.11 www.MonolithicPower.com 3
1/10/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, T
A
= +25C, unless otherwise noted.
Parameter Symbol Condition Min Typ Max Units
Shutdown Supply Current V
EN
= 0V 20 30 μA
Supply Current V
EN
=3V, V
FB
= 1.4V 1.0 1.2 mA
Feedback Voltage V
FB
4.75V V
IN
28V
V
COMP
< 2V
1.194 1.222 1.250 V
Error Amplifier Voltage Gain A
EA
400 V/V
Error Amplifier
Transconductance
G
EA
I
COMP
= 10μA
500 800 1120 μA/V
High-Side Switch
On-Resistance
R
DS(ON)1
100 140 mΩ
Low-Side Switch
On-Resistance
R
DS(ON)2
10 Ω
High-Side Switch Leakage
Current
V
EN
= 0V, V
SW
= 0V 0 10 μA
Current Limit 4.8 6.2 7.6 A
Current Sense to COMP
Transconductance
G
CS
5.4 A/V
Oscillation Frequency f
OSC1
335 385 435 kHz
Short Circuit Oscillation
Frequency
f
OSC2
V
FB
= 0V 25 45 60 kHz
Maximum Duty Cycle D
MAX
V
FB
= 1.0V 90 %
Minimum Duty Cycle D
MIN
V
FB
= 1.5V 0 %
EN Rising Threshold 2.05 2.5 2.95 V
EN Threshold Hysteresis 150 mV
Enable Pull Up Current V
EN
= 0V 1.0 1.7 2.5 μA
Under-Voltage Lockout
Threshold
V
IN
Rising 3.75 4.05 4.35 V
Under-Voltage Lockout
Threshold Hysteresis
210 mV
Soft-Start Period C
SS
= 0.1μF 10 ms
Thermal Shutdown
160
C
P1-P3P4-P6P7-P9P10-P12P13-P13

MP1593DN-LF-Z

Mfr. #:
Buy MP1593DN-LF-Z
Manufacturer:
Monolithic Power Systems (MPS)
Description:
Switching Voltage Regulators 3A 28V 385kHz Step-Down Converter
Lifecycle:
New from this manufacturer.
Delivery:
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