Datasheet

SWITCH CURRENT LIMIT
(A)
1.1 1.7 2.3 2.8 3.4 4.0
SHDN PIN VOLTAGE (V)
1.2
1.0
0.9
0.7
0.6
0.4
LMR14206
www.ti.com SNVS733D –OCTOBER 2011–REVISED APRIL 2013
Typical Performance Characteristics
Input UVLO vs. Temperature SHDN Pin Current vs. SHDN Pin Voltage
Figure 3. Figure 4.
Switching Node and Output Voltage Waveforms Load Transient Waveforms
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 200 mA V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 300 mA to 200 mA to 300 mA
Top trace: V
OUT
, 10 mV/div, AC Coupled Top trace: V
OUT
, 20 mV/div, AC Coupled
Bottom trace: SW, 5V/div, DC Coupled Bottom trace: I
OUT
, 100 mA/div, DC Coupled
T = 1 µs/div T = 200 µs/div
Figure 5. Figure 6.
Switch Current Limit vs. SHDN Pin Voltage
Start-Up Waveform (Soft-Start Implementation)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 50 mA
Top trace: V
OUT
, 1V/div, DC Coupled
Bottom trace: SHDN, 2V/div, DC Coupled
T = 40 µs/div
Figure 7. Figure 8.
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