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MP1567 Datasheet(PDF) 3 Page - Monolithic Power Systems

Part # MP1567
Description  1.2A Synchronous Rectified Step-Down Converter
PDF  11 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP1567 Datasheet(HTML) 3 Page - Monolithic Power Systems

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MP1567 – 1.2A SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
MP1567 Rev. 2.3
www.MonolithicPower.com
3
1/3/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
TM
ELECTRICAL CHARACTERISTICS (continued)
VIN = 5V, TA = +25°C, unless otherwise noted.
Parameter
Symbol
Condition
Min
Typ
Max
Units
Error Amplifier
Voltage Gain
AVEA
400
V/V
Transconductance
GEA
300
µA/V
COMP Maximum Output Current
±30
µA
FB Regulation Voltage
VFB
875
905
935
mV
FB Input Bias Current
IFB
FB = 0.9V
–100
nA
Soft-Start
Soft-Start Current
ISS
2
µA
Output Switch On-Resistance
VIN = 5V
265
mΩ
Switch On Resistance
VIN = 3V
330
mΩ
VIN = 5V
220
mΩ
Synchronous Rectifier On Resistance
VIN = 3V
270
mΩ
Switch Current Limit (Source)
1.5
2.0
A
Synchronous Rectifier Current Limit (Sink)
350
mA
Thermal Shutdown
160
°C
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 3.3V, VOUT = 1.8V, TA = +25°C, unless otherwise noted.
MP1567-TPC01
Current Limit vs.
Duty Cycle
VOUT
50mV/div.
ILOAD
0.5A/div.
MP1567-TPC02
Load Transient
0.1A to 1A Load Step
VSS
1V/div.
VOUT
1V/div.
IIN
0.5A/div.
2ms/div.
MP1567-TPC03
VOUT
1V/div.
VSS
1mV/div.
IINDUCTOR
1A/div.
2ms/div.
MP1567-TPC04
Output Short Circuit
IOUT = 1.2A
VSW
2V/div.
IINDUCTOR
1A/div.
MP1567-TPC05
Steady State
2.5
2.0
1.5
1.0
0.5
0
0
20406080
DUTY CYCLE (%)



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