Linear Technology LTC3626EUDC Demo Manual

DESCRIPTION
Demonstration circuit 1768A is a step-down converter,
using the LTC3626 monolithic synchronous buck regulator,
which has current and temperature monitoring capabilities.
The 1768A has an input voltage range of 3.6V to 20V, and
is capable of delivering up to 2.5A of output current. The
output voltage of the 1768A can be set as low as 0.6V, the
reference voltage of the LTC3626. At light load currents, the
1768A is capable of operating in Burst Mode
for greater efficiency, and during shutdown, it consumes
less than 2μA of quiescent current. In continuous mode
operation, the 1768A is a high efficiency circuit over 90%.
The 1768A can also track another voltage with the LTC3626
PERFORMANCE SUMMARY
PARAMETER
Input Voltage Range
Output Voltage Range
Run/Shutdown
Output Voltage Regulation
Typical Output
Ripple Voltage
Burst Mode-to-Continuous Mode
Transition Current Values
Mode
Nominal Switching Frequency
DEMO MANUAL DC1768A
20V, 2.5A Synchronous Monolithic
Step-Down Regulator with Current
and Temperature Monitoring
track function. Because of the current and temperature
monitoring and limiting capabilities of the LTC3626, the
1768A input or output current, as well as its maximum
temperature can be limited or clamped. The 1768A uses
low profile surface mount components, due to the high
switching frequency capability of the LTC3626, which is
programmable up to 3MHz. All these features make the
™ , which makes 1768A an ideal circuit for use in industrial applications.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
CONDITIONS
V = 3.6V to 20V, I = 0A to 2.5A
IN OUT
V = 3.6V to 20V, I = 0A to 2.5A
IN OUT
V = 4V to 20V, I = 0A to 2.5A
IN OUT
V = 12V, V = 1.8V
IN OUT
I = 2.5A (20MHz BW)
OUT
V = 12V, V = 1.2V
IN OUT
V = 12V, V = 1.8V
IN OUT
V = 12V, V = 3.3V
IN OUT
Mode Pin = INTV
CC
Mode = GND
Mode = Floating
R = 324k
T
R connected to INTV
T CC
LTC3626EUDC
VALUE
3.6V –20V
0.6V-6V
GND = Shutdown
V = Run
IN
1.2V ±2% Typ. (1.176V – 1.224V)
1.8V ±2% Typ. (1.764V – 1.836V)
3.3V ±2% Typ. (3.234V – 3.366V)
< 20mV
P-P
I < 680mA
OUT
I < 880mA
OUT
I < 1.2A
OUT
Burst Mode
FCM (Forced Continuous Mode)
Synchronized or Burst Mode
1MHz ±20%
2MHz ±30%
dc1768af
1