ltc3612 Linear Technology Corporation, ltc3612 Datasheet - Page 21

• Manufacturer Part Number: ltc3612
• Description: 3a, 4mhz Monolithic Synchronous Step-down Dc/dc Converter
• Manufacturer: Linear Technology Corporation

APPLICATIONS INFORMATION
PIN VOLTAGE
PIN VOLTAGE
TRACK/SS
TRACK/SS
VOLTAGE
VOLTAGE
VOLTAGE
RUN PIN
SV
VOLTAGE
VOLTAGE
VOLTAGE
RUN PIN
SV
V
V
FB
IN
FB
IN
PIN
PIN
PIN
PIN
SHUTDOWN
SHUTDOWN
0.45V
0.45V
0.6V
0.6V
0.2V
STATE
STATE
0.3V
0.3V
0.2V
V
V
V
V
0V
0V
0V
0V
0V
0V
0V
0V
IN
IN
IN
IN
Figure 8. DDR Pin Tied to SV
SOFT-START
SOFT-START
t
t
SS
SS
STATE
STATE
> 1ms
> 1ms
Figure 7. DDR Pin Not Tied to S
REFERENCE 0.45V
RUN STATE
RUN STATE
EXTERNAL
VOLTAGE
IN
. Example DDR Application
DOWN
TRACKING
STATE
DOWN
TRACKING
STATE
FREQUENCY
SWITCHING
REDUCED
FREQUENCY
SWITCHING
REDUCED
TRACKING
VIN
TRACKING
STATE
STATE
UP
UP
RUN STATE
RUN STATE
TIME
TIME
3612 F07
3612 F08
LTC3612
21
3612f