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| LTC3542-1_15 Datasheet, PDF (14/16 Pages) Linear Technology – 500mA, 2.25MHz 2.8V Output Synchronous Step-Down DC/DC Converter | |||
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LTC3542-1
APPLICATIONS INFORMATION
VIN
3V TO 5.5V
CIN**
10μF
VIN
SW
LTC3542-1
L*
2.2μH
VOUT
2.8V
500mA
RUN VOUT
MODE/SYNC
GND
COUT**
10μF
35421 F03a
*SUMIDA CDRH2D18HP-2R2NC
**TDK C2012X5R0J106M
Figure 3a. Typical Application
GND
VIN
VOUT 1
6 RUN VIA TO VOUT
VIN 2
GND
5
MODE/
SYNC
CIN
GND 3
4 SW
L
GND
COUT
VOUT
Figure 3b. Layout Diagram
35421 F03b
100
VIN = 3.6V
90
80
70
60
50
40
30
20
10
0 FIGURE 3a CIRCUIT
0.1
1
10
100
LOAD CURRENT (mA)
1000
35421 F03c
Figure 3c. Efï¬ciency Curve
VOUT
100mV/DIV
AC COUPLED
IL
500mA/DIV
ILOAD
500mA/DIV
VIN = 3.6V
20μs/DIV
ILOAD = 30mA TO 500mA
FIGURE 3a CIRCUIT
Figure 3d. Load Step
35421 G05
14
35421f
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