1
DEMO MANUAL DC2529A
UG-1311 Rev 0
DESCRIPTION
LTC7810ELXE
High Input Voltage Dual Output
Synchronous Buck Converter
Demonstration circuit 2529A is a dual output synchro-
nous buck converter featuring the LTC
48-lead eLQFP package.
Key features of this board include: an optional on-board
NMOS LDO for DRVCC; jumper for spread-spectrum
option; optional resistors for single output dual phase
operation; a mode selector that allows the converter to
run in CCM, pulse-skipping, adjustable burst clamp or
default Burst Mode
®
operation; SYNC turret for Poly-
Phase
®
operation.
L
, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and PolyPhase are registered
trademarks of Analog Devices, Inc. All other trademarks are the property of their respective
owners.
PERFORMANCE SUMMARY
The input voltage range of this demo board is from 16V to
130V and it uses a sense resistor for overcurrent protec-
tion. The LTC7810 data sheet gives a complete descrip-
tion of the part, operation and application information and
must be read in conjunction with this demo manual for
DC2529A.
Design files for this circuit board are available at
Specifications are at T
A
= 25°C
Table 1.
PARAMETER
CONDITIONS
VALUE
Input Voltage Range
16V to 130V
Output Voltage V
OUT1
V
IN
= 16V to 130V, I
OUT1
= 0A to 10A, JP4: FCM
5V ± 2%
Output Voltage V
OUT2
V
IN
= 16V to 130V, I
OUT2
= 0A to 5A, JP4: FCM
12V ± 2%
Maximum Output Current I
OUT1,MAX
V
IN
= 16V to 130V, I
OUT1,MAX
10A
Maximum Output Current I
OUT2,MAX
V
IN
= 16V to 130V, I
OUT2,MAX
5A
Default Operating Frequency (Typical)
100kHz
External Clock Sync. Frequency Range
75kHz to 750kHz
Typical Full Load Efficiency (See Figure 4)
V
IN
= 48V, V
OUT1
= 5V, I
OUT1
= 10A
V
IN
= 48V, V
OUT2
= 12V, I
OUT
= 5A
88.7%
95.4%
