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MP1411 Datasheet Preview

MP1411 Datasheet

Step Down Converter

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MP1411 pdf
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TM
The Future of Analog IC Technology TM
DESCRIPTION
The MP1411 is a monolithic step-down switch
mode converter with a built in internal power
MOSFET. It achieves 2A 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. In
shutdown mode the regulator draws 23µA of
supply current. Programmable soft-start
minimizes the inrush supply current and the
output overshoot at initial startup.
The MP1411 requires a minimum number of
readily available standard external components.
MP1411
2A, 18V, 380KHz
Step-Down Converter
FEATURES
2A Output Current
0.2Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
Up to 95% Efficiency
23µA Shutdown Mode
Fixed 380KHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75V to 18V Operating Input Range
Output Adjustable from 0.92V to 16V
Programmable Under Voltage Lockout
Available in an MSOP10 with Exposed Pad
Package
APPLICATIONS
Distributed Power Systems
Battery Charger
DSL Modems
Pre-Regulator for Linear Regulators
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.75V - 18V
OPEN = AUTOMATIC
STARTUP
C5
10nF
42
9 IN
EN
BS 5
SW
10 MP1411 7
SS FB
GND
COMP
68
C6
OPEN
C3
3.9nF
D1
B220A
VOUT
3.3V/2A
MP1411_TAC_S01
Efficiency vs
Output Current
95
90 5.0V
85 3.3V
80 2.5V
75
70
65
60
0
0.5 1.0 1.5 2.0
OUTPUT CURRENT (A)
2.5
MP1411_EC01
MP1411 Rev. 1.2
12/5/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
1



MPS
MPS

MP1411 Datasheet Preview

MP1411 Datasheet

Step Down Converter

No Preview Available !

MP1411 pdf
TM
www.DataSheet4U.com
MP1411 – 2A, 18V, 380KHz STEP-DOWN CONVERTER
PACKAGE REFERENCE
TOP VIEW
NC 1
BS 2
NC 3
IN 4
SW 5
10 SS
9 EN
8 COMP
7 FB
6 GND
EXPOSED PAD
CONNECT TO PIN 6
MP1411_PD01_MSOP10
Part Number*
MP1411DH
Package
MSOP10
Temperature
–40°C to +85°C
* For Tape & Reel, add suffix –Z (eg. MP1411DH–Z)
For Lead Free, add suffix –LF (eg. MP1411DH–LF–Z)
ABSOLUTE MAXIMUM RATINGS (1)
Supply Voltage (VIN) .................................... 20V
Switch Node Voltage (VSW).......................... 21V
Bootstrap Voltage (VBS) ....................... VSW + 6V
Feedback Voltage (VFB) ................. –0.3V to +6V
Enable/UVLO Voltage (VEN)........... –0.3V to +6V
Comp Voltage (VCOMP) ................... –0.3V to +6V
SS Voltage (VSS)............................ –0.3V to +6V
Junction Temperature.............................+150°C
Lead Temperature ..................................+260°C
Storage Temperature ..............–65°C to +150°C
Recommended Operating Conditions (2)
Supply Voltage (VIN) ...................... 4.75V to 18V
Operating Temperature.................–40°C to +85°C
Thermal Resistance (3) θJA θJC
MSOP10 with Exposed Pad .. 105 ..... 19... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
3) Measured on approximately 1” square of 1 oz copper.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25°C, unless otherwise noted.
Parameter
Symbol Condition
Feedback Voltage
Upper Switch On Resistance
Lower Switch On Resistance
Upper Switch Leakage
Current Limit (4)
VFB
RDS(ON)1
RDS(ON)2
4.75V VIN 18V
VEN = 0V, VSW = 0V
Current Sense Transconductance
Output Current to Comp Pin Voltage
GCS
Error Amplifier Voltage Gain
Error Amplifier Transconductance
Oscillator Frequency
Short Circuit Frequency
Soft-Start Pin Equivalent
Output Resistance
AVEA
GEA
fS
IC = ±10µA
VFB = 0V
Min
0.892
2.8
550
Typ
0.920
0.2
10
0
3.4
1.95
400
830
380
240
9
Max
0.948
10
1150
Units
V
µA
A
A/V
V/V
µA/V
KHz
KHz
k
MP1411 Rev. 1.2
12/5/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
2


Part Number MP1411
Description Step Down Converter
Maker MPS
Total Page 8 Pages
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