Datasheet

LTC1773
16
1773fb
1773 TA03
+
1
2
3
4
5
10
9
8
7
6
R
SENSE
0.025Ω
33pF
200pF
0.1µF
30k
249k
1%
80.6k
1%
V
OUT
3.3V
1A
2.7V ≤ V
IN
≤ 4.2V
+
LTC1773
RUN/SS
SYNC/FCB
GND
SENSE
–
V
IN
TG
I
TH
V
FB
BG
SW
L1
2µH
L1
2µH
C
IN
150µF
6.3V
Si9804DY
Si9803DY
C
OUT
220µF
6.3V
47µF
+
C
IN
: SANYO POSCAP 6TPA150M
C
OUT
: AVX TPSD227M006R0100
L1: COILTRONICS CTX2-4/BH ELECTRONICS 511-1010
R
SENSE
: IRC LR1206-01-R033-F
V
IN
Figure 10. Single Lithium-Ion to 3.3V/1A Synchronous Zeta Converter
TYPICAL APPLICATIONS
U
OUTPUT CURRENT (A)
0.001
EFFICIENCY (%)
100
90
80
70
60
50
40
30
20
0.01 0.1 1.0
1773 G18
V
OUT
= 3.3V
V
IN
= 2.7V
V
IN
= 5V
V
IN
= 3.3V
V
IN
= 4V
Efficiency Curve for Figure 10