Linear Technology LTC3118, Demo Manual, Page: 2 / 9

2
dc2045af
DEMO MANUAL DC2045A
Quick start proceDure
0
10
20
30
40
50
60
70
80
90
100
1 10 100 1000 10000
EFFICIENCY (%)
LOAD (mA)
V
IN
=3.3V, BURST MODE
V
IN
=5V, BURST MODE
V
IN
=12V, BURST MODE
V
IN
=3.3V, FIXED FREQ
V
IN
=5V, FIXED FREQ
V
IN
=12V, FIXED FREQ
Figure 1. Typical Efficiency as a Function of Input Voltage and Load Current
Figure 3. Transitioning from V
IN1
to V
IN2
and Back in PRIORITY Mode Operation with V
IN2
at 14V
Figure 2. Ideal Diode Mode Operation
V
OUT
= 100mV/DIV
V
OUT
DC = 5V
V
IN2
= 2V/DIV
V
IN2
DC = 8V
V
IN1
= 2V/DIV
V
IN1
PEAK = 10V
V
IN1
VALLEY = 4V
V
OUT
= 500mV/DIV
V
OUT
DC = 5V
I
IN1
= 500mA/DIV
V
IN2
= 14V and is Not Shown on Screen
V
IN1
= 2V/DIV
VOLTAGE PEAK = 10V
VOLTAGE VALLEY = 1V