Linear Technology DC1667A Demo Manual

DESCRIPTION
Demonstration circuit DC1667A is a step-down DC/
DC converter using LTC
®
buck regulator. DC1667A has an input voltage range of
4.5V to 15V, and is capable of delivering up to 1.5A of
output current. The output voltage of the DC1667 can be
set by a single resistor from 0V to (V
load conditions, DC1667 can operate in discontinuous
mode to improve the efficiency. During shutdown mode,
LTC3600 consumes less than 1µA. The switching frequency
of LTC3600 is programmable from 200kHz to 4MHz.
DC1667A uses low profile surface mount components.
PERFORMANCE SUMMARY
PARAMETER
Input Voltage Range
Default Output Voltage V
OUT
Maximum Continuous Output Current
Default Operating Frequency
Typical Output Voltage Ripple
Efficiency
3600 monolithic synchronous
– 0.5)V. At light
IN
(T = 25°C)
A
CONDITIONS
V = 4.5V to 15V, I
IN
V = 5V, V = 1.2V, I
IN OUT
V = 5V, V = 1.2V, I
IN OUT
DEMO MANUAL DC1667A
16V, 1.5A Synchronous
Step-Down Regulator with
Programmable Reference
These features and the availability of LTC3600 in a 12-lead
DFN/MSOP package, make it ideal for use in point-of-load
power supplies, battery-powered equipments and voltage
tracking systems. The LTC3600 data sheet must be read
in conjunction with this demo manual for working on or
modifying the demo circuit DC1667A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1667A
L, LT, LTC, LTM, µModule, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
= 0A to 1.5A, JP10: CCM
OUT
= 1.5A, f = 1MHz
OUT SW
= 1.5A, f = 1MHz
OUT SW
LTC3600
VALUE
4.5V to 15V
1.215V ± 2% (1.19V to 1.24V)
1.5A
1MHz
<10mV (See Figure 4)
78% (See Figure 3)
dc1667afa
1