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dc1596afa
DEMO MANUAL DC1596A
DESCRIPTION
LTC3607EUD
Dual 600mA 15V Monolithic
Synchronous Step-Down Regulator
Demonstration circuit DC1596 is a dual output regulator
consisting of two constant-frequency step-down convert-
ers, based on the
LTC
®
3607
monolithic dual channel
synchronous buck regulator. The DC1596 has an input
voltage range of 4.5V to 15V, with each regulator capable of
delivering up to 600mA of output current. The DC1596 can
operate in either Burst Mode
®
operation or pulse-skipping
mode. In shutdown, the DC1596 quiescent current is less
than 1µA. The DC1596 is a very efficient circuit attaining
up to 90%. The DC1596 uses the LTC3607’s16-lead QFN
L
, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
PERFORMANCE SUMMARY
package, which has an exposed pad on the bottom side
of the IC for better thermal performance. These features,
plus a set operating frequency range of 2.25MHz, make
the DC1596 demo board an ideal circuit for industrial or
distributed power applications.
Design files for this circuit board are available at
http://www.linear.com/demo
Specifications are at T
A
= 25°C
PARAMETER
CONDITIONS
VALUE
Minimum Input Voltage
4.5V
Maximum Input Voltage
15V
Run
RUN Pin = GND
RUN Pin = V
IN
Shutdown
Operating
Output Voltage V
OUT1
Regulation
V
IN1
= 4.5V to 15V, I
OUT1
= 0A to 600mA
1.2V ±4% (1.152V-1.148V)
1.5V ±4% (1.44V-1.56V)
1.8V ±4% (1.728V-1.872V)
Typical Output Ripple V
OUT1
V
IN1
= 12V, I
OUT1
= 600mA (20MHz BW)
<20mV
P-P
Output Voltage V
OUT2
Regulation
V
IN2
= 4.5V to 15V, I
OUT2
= 0A to 600mA
2.5V ±4% (2.425V-2.6V)
3.3V ±4% (3.168V-3.432V)
5V ±4% (4.8V-5.2V)
Typical Output Ripple V
OUT2
V
IN2
= 12V, I
OUT2
= 600mA (20MHz BW)
<20mV
P-P
Mode Setting
Mode Pin Floating
Mode Pin Grounded
Burst Mode Operation
Pulse-Skipping
Burst Mode Operation Output Current Thresholds Channel 1: PV
IN1
= 12V, V
OUT1
= 1.8V
Channel 2: PV
IN2
= 12V, V
OUT2
= 3.3V
I
OUT1
< 480mA
I
OUT2
< 360mA
Pulse-Skipping Operation Output Current
Thresholds
Channel 1: PV
IN1
= 12V, V
OUT1
= 1.8V
Channel 2: PV
IN2
= 12V, V
OUT2
= 3.3V
I
OUT1
< 330mA
I
OUT2
< 240mA
Switching Frequency
2.25MHz ±20%
