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| MP1543 Datasheet, PDF (3/9 Pages) Monolithic Power Systems – 1.5A, 500KHz Synchronous Rectified Step-up Converter | |||
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TM
MP1543 â 1.5A, 500KHZ SYNCHRONOUS RECTIFIED STEP-UP CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
Circuit on front page, VIN = 2.4V, VOUT = 3.3V, TA = +25°C, unless otherwise noted.
Efficiency vs
Load Current
100
VIN=3V
90
Efficiency vs
Load Current
100
VIN=4.2V
90
Discontinuous Mode
Operation
ILOAD = 25mA
80
70
VIN=2.4V
60
VIN=1.8V
80
VIN=3.6V
70
60
VIN=2.4V
VSW
2V/div.
VOUT AC
10mV/div.
50
50
IINDUCTOR
40
40
VOUT=5V
0.1A/div.
30
1
10
100
1000
LOAD CURRENT (mA)
MP1543-TPC01
30
1
10
100
1000
LOAD CURRENT (mA)
MP1543-TPC02
MP1543-TPC03
Continuous Mode
Operation
ILOAD = 400mA
Transient Response
ILOAD = 40mA to 400mA Step
w/o Feed-Forward Capacitor
Transient Response
ILOAD = 40mA to 400mA Step
with 220pF Feed-Forward Capacitor
VSW
2V/div.
VOUT AC
50mV/div.
VOUT AC
100mV/div.
VOUT AC
100mV/div.
IINDUCTOR
0.2A/div.
ILOAD
0.2A/div.
ILOAD
0.2A/div.
VEN
2V/div.
VSW
2V/div.
VOUT
2V/div.
MP1543-TPC04
MP1543-TPC05
MP1543-TPC06
MP1543-TPC07
Feedback Voltage vs
Temperature
1.190
1.186
1.182
1.178
1.174
1.170
-40
0
40
80 120
TEMPERATURE (°C)
MP1543-TPC08
Switching Frequency
vs Temperature
540
530
520
510
500
490
480
470
460
-40
0
40
80 120
TEMPERATURE (°C)
MP1543-TPC09
MP1543 Rev. 1.0
www.MonolithicPower.com
3
1/11/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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