LTC1773 LINER [Linear Technology], LTC1773 Datasheet - Page 16

• Manufacturer Part Number: LTC1773
• Description: Synchronous Step-Down DC/DC Controller
• Manufacturer: LINER [Linear Technology]

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