Datasheet

0.0 0.1 0.2 0.3
LOAD (A)
0
20
40
60
80
100
EFFICIENCY (%)
V
IN
= 12V
V
IN
= 24V
0.4 0.5 0.6
V
IN
= 36V
www.ti.com Typical Performance Characteristics
7 Typical Performance Characteristics
VIN = 12V, VOUT = 3.3V, IOUT = 200 mA
Top Trace: VOUT, 10 mV/div, AC Coupled
Bottom Trace: SW, 5V/div, DC Coupled
T = 1 µs/div
Figure 2. Efficiency vs. Load Current Figure 3. Switching Node and Output Voltage
Waveforms
VIN = 12V, VOUT = 3.3V, IOUT = 200 mA to 300 mA VIN = 12V, VOUT = 3.3V, IOUT = 50 mA
Top Trace: VOUT, 20 mV/div, AC Coupled Top Trace: VOUT, 1V/div, DC Coupled
Bottom Trace: IOUT, 100 mA/div, DC Coupled Bottom Trace: SHDN, 2V/div, DC Coupled
T = 200 µs/div T = 40 µs/div
Figure 4. Load Transient Waveforms Figure 5. Startup Waveform
3
SNVA377D–March 2009–Revised April 2013 AN-1908 LM2842 Evaluation Board
Submit Documentation Feedback
Copyright © 2009–2013, Texas Instruments Incorporated