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PDF MP2122 Data sheet ( Hoja de datos )
| Número de pieza | MP2122 | |
| Descripción | SYNC Buck Regulator | |
| Fabricantes | MPS | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MP2122 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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The Future of Analog IC Technology
MP2122
6V, 2A, Low Quiescent Current
Dual, SYNC Buck Regulator
DESCRIPTION
The MP2122 is an internally-compensated,
1MHz fixed-frequency, dual PWM, synchronous,
step-down regulator. The MP2122 operates
from a 2.7V-to-6V input, generates an output
voltage as low as 0.608V, and has a 45µA
quiescent current that makes it ideal for
powering portable equipment that runs on a
single cell lithium-ion (Li+) battery.
The MP2122 integrates dual 80mΩ high-side
switches and 35mΩ synchronous rectifiers for
high efficiency without an external Schottky
diode. Peak-current mode control and internal
compensation limits the minimum number of
readily-available external components.
Fault-condition protections include cycle-by-cycle
current limiting and thermal shutdown.
The MP2122 is available in an 8-pin TSOT23-8
package.
FEATURES
• Dual 2A-Output Current
• >93% Peak Efficiency
• >80% Light-Load Efficiency
• Wide 2.7V-to-6V Operating Input Range
• 80mΩ and 35mΩ Internal Power MOSFET
• 1MHz Fixed Switching Frequency
• Adjustable Output from 0.608V to VIN
• 180° Phase-Shifted Operation
• 100% Duty-Cycle Operation
• 45µA Quiescent Current
• Cycle-by-Cycle Over-Current Protection
• Short-Circuit Protection with Hiccup Mode
• Thermal Shutdown
• Available in an 8-pin TSOT23-8 Package
APPLICATIONS
• Small/Handhold Devices
• DVD Drivers
• Portable Instruments
• Smartphones and Feature Phones
• Battery-Powered Devices
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
5V
EN1
VOUT1
1.8V
COUT1
22µF
CIN
22µF
L1
1.5uH
R1
806kO
EN1 IN EN2
SW1 SW2
MP2122
FB1 GND FB2
L2
1.5uH
R3
806kO
EN2
VOUT2
1.2V
COUT 2
22µF
R2
412kO
R4
825kO
100
90
80
70
60
50
40
30
0.01
0.1
1
10
MP2122 Rev. 1.01
www.MonolithicPower.com
5/31/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1
1 page  
MP2122 –6V, 2A, LOW QUIESCENT CURRENT, DUAL, SYNC BUCK REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, VOUT1 = 1.8V, VOUT2 = 1.2V, L = 1.5µH, COUT1=COUT2=22µF, TA = 25°C, unless otherwise
noted.
40
35
30
25
20
15
10
5
0
0 0.5 1 1.5 2 2.5
MP2122 Rev. 1.01
www.MonolithicPower.com
5/31/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
5
5 Page 
MP2122 –6V, 2A, LOW QUIESCENT CURRENT, DUAL, SYNC BUCK REGULATOR
UVLO &
Bandgap
UVLO
0.608V
INTERNAL SS
0.608V
FB1
COMP1
PWM
EN1
EN2
PH1
1MHz
OSCILLATOR
PH2
ISLOPE1
Slope
Comp
OSC1
Slope
Comp
OSC2
INTERNAL SS
0.608V
FB2
ISLOPE2
COMP2
PWM
CONTROL
LOGIC
Hi-Z
CONTROL
LOGIC
Hi-Z
VIN
MAIN
SWITCH
PCH
SW1
LOW SIDE
GATE DRIVER
SYNCHRONOUS
RECTIFIER
NCH
GND
VIN
MAIN
SWITCH
PCH
SW2
LOW SIDE
GATE DRIVER
SYNCHRONOUS
RECTIFIER
NCH
GND
Figure 1: Functional Block Diagram
MP2122 Rev. 1.01
www.MonolithicPower.com
5/31/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet MP2122.PDF ] | |
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