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PDF MP2364 Data sheet ( Hoja de datos )
| Número de pieza | MP2364 | |
| Descripción | 1.4MHz Step-Down Converter | |
| Fabricantes | MPS | |
| Logotipo |  |
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TM
The Future of Analog IC Technology TM
MP2364
Dual 1.5A, 23V, 1.4MHz
Step-Down Converter
DESCRIPTION
The MP2364 is a dual monolithic step-down
switch mode converter with built-in internal
power MOSFETs. It achieves 1.5A continuous
output current for each output 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 40µA of
supply current.
The MP2364 requires a minimum number of
readily available standard external components.
EVALUATION BOARD REFERENCE
Board Number
EV2364DF-01A
Dimensions
2.2”X x 1.6”Y x 0.4”Z
FEATURES
• 1.5A Current for Each Output
• 0.18Ω Internal Power MOSFET Switches
• Stable with Low ESR Output Ceramic
Capacitors
• Up to 90% Efficiency
• 40µA Shutdown Mode
• Fixed 1.4MHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Wide 4.75V to 23V Operating Input Range
• Each Output Adjustable from 0.92V to 16V
• Configurable for Single Output with Double
the Current
• Programmable Under Voltage Lockout
• Programmable Soft-Start
• Available in TSSOP20 with Exposed Pad
and SOIC Packages
APPLICATIONS
• Distributed Power Systems
• I/O and Core supplies
• DSL Modems
• Set top boxes
• Cable Modems
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
12V
3.3V @ 1.5A
OFF ON
10nF
2A
Schottky
1 20
SSA
ENA
2 19
NC1
COMPA
3 18
BSA
FBA
4 17
INA SGB
5 16
SWA
6
MP2364
PGB
15
PGA
SWB
7 14
SGA
8
INB 13 10nF
FBB
NC2
9 12
COMPB
BSB
10 11
ENB
SSB
82pF
2A
Schottky
3.3nF
OFF ON
2.2nF
2.5V @ 1.5A
MP2364_TAC_S01
Efficiency vs
Load Current
100
90 VOUT=3.3V
VOUT=5V
80 VOUT=2.5V
70
60
50
0
0.5 1.0
LOAD CURRENT (A)
1.5
MP2364_EC01
MP2364 Rev. 1.4
3/22/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
1
1 page  
TM
MP2364 — DUAL 1.5A, 23V, 1.4MHz STEP-DOWN CONVERTER
PIN FUNCTIONS (SOIC16)
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Name
SSA
BSA
INA
SWA
GNDA
FBB
COMPB
ENB
SSB
BSB
INB
SWB
GNDB
FBA
COMPA
ENA
Description
Soft-Start Control for Channel A. 9kΩ output resistance from the pin. Set RC time constant
with external capacitor for soft start ramp time. Ramp Time = 2.2 x 9kΩ x C.
High-Side Driver Boost Pin. Connect a 10nF capacitor from this pin to SWA.
Supply Voltage Channel A. The MP2364 operates from a +4.75V to +23V unregulated input.
Input Ceramic Capacitors should be close to this pin.
Switch Channel A. This connects the inductor to either INA through M1A or to PGA through M2A.
Ground A.
Feedback Voltage for Channel B. This pin is the feedback voltage. The output voltage is ratio scaled
through a voltage divider, and the center point of the divider is connected to this pin. The voltage is
compared to the on board 0.92V reference.
Compensation Channel B. This is the output of the transconductance error amplifier. A series
RC is placed on this pin for proper control loop compensation. Please refer to more in the
datasheet.
Enable/UVLO Channel B. A voltage greater than 2.62V enables operation. Leave ENB
unconnected for automatic startup. An Under Voltage Lockout (UVLO) function can be
implemented by the addition of a resistor divider from VIN to GND. For complete low current
shutdown the ENB pin voltage needs to be less than 700mV.
Soft-Start Control for Channel B. 9kΩ output resistance from the pin. Set RC time constant
with external capacitor for soft start ramp time. Ramp Time = 2.2x9kΩxC.
High-Side Driver Boost Pin. Connect a 10nF capacitor from this pin to SWB.
Supply Voltage Channel B. The MP2364 operates from a +4.75V to +23V unregulated input.
Input Ceramic Capacitors should be close to this pin.
Switch Channel B. This connects the inductor to either INB through M1B or to PGB through M2B.
Ground B.
Feedback Voltage for Channel A. This pin is the feedback voltage. The output voltage is ratio scaled
through a voltage divider, and the center point of the divider is connected to this pin. The voltage is
compared to the on board 0.92V reference.
Compensation Channel A. This is the output of the transconductance error amplifier. A series
RC is placed on this pin for proper control loop compensation. Please refer to more in the
datasheet.
Enable/UVLO Channel A. A voltage greater than 2.62V enables operation. Leave ENA
unconnected for automatic startup. An Under Voltage Lockout (UVLO) function can be
implemented by the addition of a resistor divider from VIN to GND. For complete low current
shutdown the ENA pin voltage needs to be less than 700mV.
MP2364 Rev. 1.4
3/22/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
5
5 Page 
TM
MP2364 — DUAL 1.5A, 23V, 1.4MHz STEP-DOWN CONVERTER
PACKAGE INFORMATION
0.0256(0.650)TYP
TSSOP20F
0.105 (2.67)
0.118 (3.00)
pad width
0.030(0.750)
PIN 1
IDENT.
0.030(0.750)
0.150 (3.80)
0.165 (4.19)
pad length
0.169
0.177
0.244
0.260
(4.300) (6.200)
(4.500) (6.600)
0.047(1.200)
max
0.252 (6.400)
0.260 (6.600)
0.007(0.190)
0.012(0.300)
0.032(0.800)
0.041(1.050) SEATING PLANE
0.002(0.050)
0.006(0.150)
NOTE:
1) Control dimension is in inches. Dimension in bracket is millimeters.
0.004(0.090)
0.010(0.250)
GATE PLANE
0o-8o
0.018(0.450)
0.030(0.750)
0.004(0.090)
DETAIL "A"
0.039(1.000)REF
SEE DETAIL "B"
SEE DETAIL "A"
0.075(0.190)
0.012(0.300)
0.004(0.090)
0.006(0.160)
0.004(0.090)
0.008(0.200)
0.007(0.190)
0.010(0.250)
DETAIL "B"
MP2364 Rev. 1.4
3/22/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MP2364.PDF ] | |
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