Datasheet

LT3579/LT3579-1
38
35791fa
For more information www.linear.com/LT3579
TYPICAL APPLICATION
V
IN
2.8V TO 4.2V
L1
0.47µH
D1
C
OUT1
22µF
C
IN
10µF
V
OUT
5V
2A
C
OUT
22µF
C
IN
: 10µF, 16V, X7R, 1206
C
OUT1
, C
OUT
: 22µF, 16V, X7R, 1210
D1: CENTRAL SEMI CTLSH3-30M833
L1: VISHAY IHLP-2020BZ-01-R47
M1: SILICONIX SI7123DN
100k
35791 TA26
43.5k 10k
6.34k
2.2nF22nF
47pF
43.2k
M1
SW1 SW2
V
IN
FB
CLKOUT
V
C
SSGND
GATESHDN
SYNC
RT
FAULT
LT3579
2MHz, Boost Converter with Output Disconnect Generates a 5V Output from 2.8V to 4.2V Input
Efficiency and Power Loss
LOAD CURRENT (A)
0
20
30
50
90
EFFICIENCY (%)
POWER LOSS (W)
70
80
60
40
100
0
0.9
1.2
1.5
1.8
2.1
0.6
0.3
2.4
10.5 2.521.5
35791 TA27
V
IN
= 3.3V
100µs/DIV
V
OUT
200mV/DIV
AC COUPLED
I
LOAD
1A/DIV
I
L
1A/DIV
35791
TA28
Transient Response with 0.8A to 1.8A to 0.8A
Output Load Step (V
IN
= 3.3V)