Datasheet

2 ms/DIV
VOUT 1V/DIV
IOUT 1A/DIV
PGOOD 1V/DIV
EN 1V/DIV
2 ms/DIV
VOUT
1V/DIV
EN 1V/DIV
IOUT 1A/DIV
PGOOD 1V/DIV
0 1 2 3 4 5
50
55
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
LOAD CURRENT (A)
VOUT = 3.3V
VOUT = 2.5V
VOUT = 1.8V
VOUT = 1.2V
0 1 2 3 4 5
50
55
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
LOAD CURRENT (A)
VOUT = 5V
VOUT = 3.3V
VOUT = 2.5V
VOUT = 1.8V
VOUT = 1.2V
Typical Performance Characteristics www.ti.com
8 Typical Performance Characteristics
Efficiency with PVIN = AVIN = 5V Efficiency with PVIN = AVIN = 12V
f
S
= 500 kHz f
S
= 500 kHz
Startup, No Load Startup, 5A Resistive Load
6
AN-2042 LM21305 Evaluation Board SNVA432C–March 2010–Revised May 2013
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