Datasheet

LTC1773
15
1773fb
TYPICAL APPLICATIONS
U
Figure 8. Dual Output 2.5V/2A and 5V/100mA Application
I
OUT
(mA)
1
EFFICIENCY (%)
100
10000
100
95
90
85
80
75
70
65
60
1773 • G17
10 1000
V
IN
= 3.3V
V
IN
= 5V
Efficiency Curve for Figure 9
1773 TA01
+
1
2
3
4
5
10
9
8
7
6
R
SENSE
0.033Ω
33pF
200pF
0.1µF
30k
169k
1%
80.6k
1%
422k
80.6k
V
OUT1
2.5V
2A
V
OUT2
5V
100mA
2.7V ≤ V
IN
≤ 8.4V
+
LTC1773
RUN/SS
SYNC/FCB
GND
SENSE
–
V
IN
TG
I
TH
V
FB
BG
SW
L1
5µH
1:1
Si9801DY
C
OUT
220µF
6.3V
+
22µF
6.2V
MBR0530LT1
C
IN
100µF
10V
C
IN
: SANYO POSCAP 10TPA100M
C
OUT
: AVX TPSD227M006R0100
L1: COILTRONICS CTX5-4/BH ELECTRONICS 511-0033
R
SENSE
: IRC LR1206-01-R033-F
1773 TA02
+
1
2
3
4
5
10
9
8
7
6
R
SENSE
0.015Ω
33pF
200pF
0.1µF
30k
169k
1%
80.6k
1%
V
OUT
2.5V
5A
2.7V ≤ V
IN
≤ 5.5V
+
LTC1773
RUN/SS
SYNC/FCB
GND
SENSE
–
V
IN
TG
I
TH
V
FB
V
IN
BG
SW
L1
2.8µH
C
IN
150µF
6.3V
Si9804DY
Si9803DY
C
OUT
220µF
6.3V
×3
C
IN
: SANYO POSCAP 6TPA150M
C
OUT
: AVX TPSD227M006R0100
L1: TOKO D104C 919AS-2R8M
R
SENSE
: DALE WSL-2010
Figure 9. Single Lithium-Ion to 2.5V/5A Regulator