mp1543dj MPS, mp1543dj Datasheet - Page 4

• Manufacturer Part Number: mp1543dj
• Description: 1.5a, 500khz Synchronous Rectified Step-up Converter
• Manufacturer: MPS

TYPICAL PERFORMANCE CHARACTERISTICS
PIN FUNCTIONS
MP1543 Rev. 1.0
1/11/2006
Pin #
88.10
88.05
88.00
87.95
87.90
87.85
87.80
1
2
3
4
5
-40
Maximum Duty Cycle
vs Temperature
Name Description
GND
OUT
SW
EN
FB
TM
TEMPERATURE (°C)
0
Regulation Feedback Input. Connect to an external resistive voltage divider from the output to
FB to set the output voltage.
Ground.
Supply Input for the MP1543. Connect to the output of the converter.
Output Switching Node. SW is the drain of the internal low-side N-Channel MOSFET and
high-side P-Channel MOSFET. Connect the inductor to SW to complete the step-up converter.
Regulator On/Off Control Input. A logic high input (V
low input (V
40
MP1543 — 1.5A, 500KHZ SYNCHRONOUS RECTIFIED STEP-UP CONVERTER
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
80
EN
MP1543-TPC10
< 0.4V) puts the MP1543 into low current shutdown mode.
120
380
370
360
350
340
330
320
310
300
© 2006 MPS. All Rights Reserved.
-40
www.MonolithicPower.com
Quiescent Current vs
Temperature
TEMPERATURE (°C)
0
40
80
MP1543-TPC11
EN
(continued)
120
> 1.4V) turns on the regulator. A logic
1.6
1.4
1.2
1.0
0.8
0
Current Limit vs
Duty Cycle
20
DUTY CYCLE (%)
40
60
80
MP1543-TPC12
100
4