LTC1773 LINER [Linear Technology], LTC1773 Datasheet - Page 20

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

RELATED PARTS
LTC1773
TYPICAL APPLICATIO
PART NUMBER
LTC1622
LTC1627/LTC1707 Low Voltage, Monolithic Synchronous Step-Down Regulator
LTC1735
LTC1735-1
LTC1771
LTC1772/B
LTC1778
LTC1779
LTC1877
LTC1878
LTC3404
20
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
C
R
D1: BAS16
40.2k
DESCRIPTION
Low Voltage Current Mode Step-Down DC/DC Controller
High Efficiency Synchronous Step-Down Switching Controller
High Efficiency Synchronous Step-Down Switching Controller
Low Quiescent Current Step-Down DC/DC Controller
SOT-23 Low Voltage Step-Down Controller
Wide Operating Range/Step-Down Controller, No R
SOT-23 Current Mode Step-Down Converter
High Efficiency Monolithic Synchronous Step-Down Regulator
High Efficiency Monolithic Synchronous Step-Down Regulator
1.4MHz Monolithic Synchronous Step-Down Regulator
IN
SENSE
33pF
0.1µF
1%
30k
, C
OUT1
: IRC LR1206-01-R050-F
●
FAX: [phone]
, C
V
200pF
IN
OUT2
: SANYO POSCAP 6TPA150M
1
2
3
4
5
I
V
RUN/SS
SYNC/FCB
GND
TH
FB
LTC1773
169k
U
1%
SENSE
Figure 16. Dual Output Synchronous Buck Converter
SW
●
V
TG
BG
IN
www.linear.com
–
249k
1%
10
9
8
7
6
Si6801DY
0.050Ω
R
SENSE
SENSE
0.1µF
10µH
3:1
L1
COMMENTS
V
Low Supply Voltage Range: 2.65V to 8V, I
Burst Mode Operation, 16-Pin Narrow SO, Fault Protection
Output Fault Protection 16-Pin GN, Burst Mode Operation,
Power Good
V
6-Pin SOT-23, 2V ≤ V
V
250mA Output Current, 2.5V ≤ V
V
V
Up to 95% Efficiency, I
No Schottky Diode Required, 8-Lead MSOP
IN
IN
IN
IN
IN
Si2302DS
: 2V to 10V, 550kHz, Burst Mode Operation, Synchronizable
: 2.8V to 18V, 10µA I
up to 36V, Current Mode, Power Good
from 2.65V to 10V, 10µA I
from 2.65V to 7V, 10µA I
47k
D1
IN
OUT
+
+
Q
≤ 10V, 550kHz
, MS8 Package
= 600mA at V
© LINEAR TECHNOLOGY CORPORATION 2006
C
150µF
6.3V
C
150µF
6.3V
Q
V
2.5V
1A
V
3.3V
500mA
OUT2
OUT1
OUT1
Q
, 550kHz, I
OUT2
, 550kHz, I
IN
4.5V ≤ V
≤ 9.8V, Up to 94% Efficiency
LT 1106 REV B • PRINTED IN USA
1773 TA04
+
IN
IN
OUT
OUT
OUT
≤ 5.5V
= 3.3V
C
150µF
6.3V
to 600mA,MS8
IN
to 0.5A
to 600mA,MS8
1773fb