LT1776C Linear Technology, LT1776C Datasheet - Page 17

• Manufacturer Part Number: LT1776C
• Description: Wide Input Range/ High Efficiency/ Step-Down Switching Regulator
• Manufacturer: Linear Technology

TYPICAL APPLICATIONS
C1: PANASONIC HFQ 39 F AT 63V
C2: AVX D CASE 100 F 10V
D1: MOTOROLA 100V, 1A,
L1: COILCRAFT DO3316-104
Figure 7. Burst Mode Operation Configuration for High Efficiency at Light Load
TPSD107M010R0080
SMD SCHOTTKY
MBRS1100 (T3)
NC
Q2
2N2369
R7
10M
U
Q1
PN2484
+
90
80
70
60
50
40
30
20
1
C1
V
IN
V
IN
= 10V
6
1
8
= 20V
V
V
IN
SYNC
SHDN
OUT
IN
V
= 30V
LTC1440
= 40V
LOAD CURRENT (mA)
LT1776
–
2
GND
10
V
V
U1
V
U2
IN
IN
+
5
4
7
HYST
GND
V
REF
V
IN
IN
SW
(a)
FB
V
CC
1
(b)
C
+
–
2
3
7
8
3
4
6
5
100
C3
100pF
D1
L1
R5
22k
R6
2.4M
1776 F07b
1000
+
C2
R1
39k
5%
R2
10k
5%
R3
323k
1%
R4
100k
1%
1776 F07a
V
5V
OUT
LT1776
17