Datasheet

0 2 4 6 8 10 12
80
82
84
86
88
90
92
94
96
98
100
EFFICIENCY (%)
OUTPUT CURRENT (A)
VIN = 3.3V
VIN = 4.0V
VIN = 5.0V
VIN = 5.5V
0 2 4 6 8 10 12
-0.04
-0.03
-0.02
-0.01
0.00
0.01
0.02
0.03
0.04
ûOUTPUT VOLTAGE (%)
OUTPUT CURRENT (A)
VIN = 3.3V
VIN = 5.0V
0 2 4 6 8 10 12
80
82
84
86
88
90
92
94
96
EFFICIENCY (%)
OUTPUT CURRENT (A)
FSW = 500kHz
FSW = 1MHz
FSW = 1.5MHz
0 2 4 6 8 10 12
80
82
84
86
88
90
92
94
96
98
100
EFFICIENCY (%)
OUTPUT CURRENT (A)
VOUT = 3.3
VOUT = 1.2
LM21212-1
www.ti.com SNVS671E –FEBRUARY 2011–REVISED MARCH 2013
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise specified: V
VIN
= 5V, V
OUT
= 1.2V, L= 0.56µH (1.8mΩ R
DCR
), C
SS
= 33nF, f
SW
= 1 MHz, T
A
= 25°C for
efficiency curves, loop gain plots and waveforms, and T
J
= 25°C for all others.
Efficiency Efficiency
Figure 2. Figure 3.
Efficiency
(VOUT = 2.5 V, f
SW
= 300 kHz , Inductor P/N SER2010-
102MLD) Load Regulation
Figure 4. Figure 5.
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