MP1567 데이터 시트보기 (PDF) - Monolithic Power Systems
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MP1567 Datasheet PDF : 11 Pages
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MP1567 – 1.2A SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS (continued)
VIN = 5V, TA = +25°C, unless otherwise noted.
Parameter
Symbol Condition
Error Amplifier
Voltage Gain
Transconductance
COMP Maximum Output Current
AVEA
GEA
FB Regulation Voltage
FB Input Bias Current
Soft-Start
VFB
IFB
FB = 0.9V
Soft-Start Current
ISS
Output Switch On-Resistance
Switch On Resistance
Synchronous Rectifier On Resistance
Switch Current Limit (Source)
VIN = 5V
VIN = 3V
VIN = 5V
VIN = 3V
Synchronous Rectifier Current Limit (Sink)
Thermal Shutdown
Min Typ Max Units
400
V/V
300
µA/V
±30
µA
875 905 935 mV
–100
nA
2
µA
265
mΩ
330
mΩ
220
mΩ
270
mΩ
1.5 2.0
A
350
mA
160
°C
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 3.3V, VOUT = 1.8V, TA = +25°C, unless otherwise noted.
Current Limit vs.
Duty Cycle
2.5
Load Transient
0.1A to 1A Load Step
2.0
VOUT
50mV/div.
1.5
1.0
VSS
1V/div.
VOUT
1V/div.
0.5
0
0
ILOAD
0.5A/div.
20
40
60
80
DUTY CYCLE (%) MP1567-TPC01
Output Short Circuit
IOUT = 1.2A
IIN
0.5A/div.
MP1567-TPC02
Steady State
2ms/div.
MP1567-TPC03
VOUT
1V/div.
VSW
2V/div.
VSS
1mV/div.
IINDUCTOR
1A/div.
IINDUCTOR
1A/div.
2ms/div.
MP1567-TPC04
MP1567-TPC05
MP1567 Rev. 2.3
www.MonolithicPower.com
3
1/3/2006
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© 2006 MPS. All Rights Reserved.
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