Linear Technology DC2017A Demo Manual

Description
Demonstration circuit 2017A features the
buck-boost μModule regulator that accepts input volt-
®
ages lower, higher or the same as the output, but is also
highly efficient due to its four-switch architecture. The
output for DC2017A is 12V and the input voltage range
is 5V to 36V. The maximum output current is 6A and the
switching frequency is 600kHz.
DC2017A supports the adjustable and controllable features
of the LTM8055 including output voltage and current
regulation, switching frequency, RUN threshold, soft-start
period, synchronization and reverse inductor current in-
hibit. In most cases, adjustment is made by modifying the
appropriate resistor or capacitor component(s). DC2017A
provides output current monitoring and a clock output.
performance summary
PARAMETER
Minimum Input Voltage, V
IN
Maximum Input Voltage, V
IN
Maximum Output Current, I
OUT
Input Turn-On Voltage, V
IN
Input Turn-Off Voltage, V
IN
Output Voltage, V
OUT
Efficiency
Switching Frequency
Output Current Limit
DEMO MANUAL DC2017A
LTM 8055, a Input current monitoring and regulation requires the in-
®
stallation of a current sense resistor. The SV
controller power can be made a diode-OR of power V
and the output voltage to extend the operating range of
power V
optional components that add an LC input filter and also a
unity gain buffer to operate multiple DC2017As in parallel.
The LTM8055 data sheet must be read in conjunction with
this demo manual to properly use or modify DC2017A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2017A
L, LT, LTC, LTM, Linear Technology, µModule and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
Specifications are at T
A
CONDITIONS
12V < V < 36V, CTL = OPEN
IN
V = 6V, CTL = OPEN
IN
R10 = 332k, R11 = 121k, V Rising
IN
R10 = 332k, R11 = 121k, V Falling
IN
100mA < I < 6A, R2 = 11k, 1%
OUT
R3 = 100k 1%, R4 = 0.008Ω
V = 24V, I = 6A
IN OUT
R1 = 36.5k
R4 = 0.008Ω
36V , 8.5A Buck-Boost
IN
μModule
®
to lower voltages. There are places to mount
IN
= 25°C
MIN
36
6
3
11.72
LTM8055
Regulator
input for
IN
IN
TYP MAX UNITS
5 V
V
A
A
5.5 V
4.5 V
12.45 V
94 %
600 kHz
6.4 A
dc2017af
1