DC1295B Linear Technology, DC1295B Datasheet

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DC1295B

Manufacturer Part Number
DC1295B
Description
BOARD DEMO LTM4606
Manufacturer
Linear Technology
Series
µModuler
Datasheets

Specifications of DC1295B

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Power - Output
-
Voltage - Output
1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V
Current - Output
6A
Voltage - Input
5 ~ 28 V
Regulator Topology
Buck
Frequency - Switching
800kHz
Board Type
Fully Populated
Utilized Ic / Part
LTM4606
Lead Free Status / Rohs Status
Not applicable / Not applicable
DESCRIPTION
Demonstration circuit DC1295B features the
LTM
density switch mode step-down power module.
The input voltage range is from 5V to 28V. The
output voltage is programmable from 0.6V to 5V:
please refer to step down ratio curve in the
LTM4606 datasheet. The rated load current is 6A,
while de-rating is necessary for certain V
and thermal conditions. Integrated input and out-
put filters enable a simple PCB layout. Only input
and output capacitors are needed externally. The
Table 1. Performance Summary (T
QUICK START PROCEDURE
Demonstration circuit DC1295B is easy to set up
to evaluate the performance of the LTM4606EV.
Please refer to Figure 1 for proper measurement
equipment setup and follow the procedure be-
low:
Vout Select
PARAMETER
Minimum Input Voltage
Maximum Input Voltage
Output Voltage V
Maximum Continuous Output Current
Default Operating Frequency
Efficiency
Load Transient
1. Place jumpers in the following positions
2. With power off, connect the input power
1.5V
®
4606EV, the low EMI, high efficiency, high
for a typical 1.5V
supply, load and meters as shown in Fig-
OUT
RUN FCB
ON
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1295B
CCM
OUT
application:
MARG1
A
CONDITION
Jumper selectable (open for 0.6V)
De-rating is necessary for certain V
mal conditions
V
V
= 25°C)
IN
IN
LO
=12V, V
=12V, V
OUT
OUT
MARG0
=3.3V, I
=1.5V
IN
LO
, V
OUT
OUT
,
=6A
6A HIGH DENSITY POWER MODULE
LTM4606 allows the user to program output ramp-
up and ramp-down through the TRACK/SS pin.
The output can be set to coincidentally or ratiome-
trically track to another voltage rail. Output voltage
margining can also be realized through jumper po-
sition selections.
Design files for this circuit board are availa-
ble. Call the LTC Factory.
Corporation.
, LTC, LT and LTM are registered trademarks of Linear Technology
IN
, V
3. Turn on the power at the input. The out-
4. Once the proper output voltage is estab-
5. The very low ripple of the LTM4606 re-
OUT
, and ther-
ure 1. Preset the load to 0A and Vin
supply to be 12V.
put voltage should be 1.5V ± 2%
(1.47V~1.53V).
lished, adjust the load within the operat-
ing range and observe the output voltage
regulation, efficiency and other parame-
ters.
quires
nique. Input ripple can be measured with
a typical scope probe, but you should not
VALUE
5V
28V
1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V; ± 2%
6A
800 KHz
89.6%, See Figure 4
See Figure 5 for detail
DC
proper
LTM4606EV
measurement
1

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DC1295B Summary of contents

Page 1

... Default Operating Frequency Efficiency V Load Transient V QUICK START PROCEDURE Demonstration circuit DC1295B is easy to set up to evaluate the performance of the LTM4606EV. Please refer to Figure 1 for proper measurement equipment setup and follow the procedure be- low: 1. Place jumpers in the following positions for a typical 1.5V ...

Page 2

... For optional load transient test, apply ad- justable pulse signal IOSTEP_CLK and GND pins. Pulse am- Figure 1. Test Setup of DC1295B. 6A HIGH DENSITY POWER MODULE plitude sets the current step. The pulse signal should have very small duty cycle (<5%) to limit the thermal stress on the transient load circuit ...

Page 3

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1295B Figure 2. Scope Probe Placements for Measuring Input Ripple. V =5V, V =1.2V, I =5A IN OUT OUT Output capacitance: 100uF+22uF ceramic caps 6A HIGH DENSITY POWER MODULE Input capacitor V =5V, V ...

Page 4

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1295B Efficiency vs. Load Current @ 12V Vin (DCM) 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50% 0.00 1.00 2.00 Load Current (A) Figure 4. Measured Supply Efficiency @ 12V V ...

Page 5

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1295B VOUT K11 VOUT K10 VOUT K9 VOUT K8 VOUT K7 VOUT K6 VOUT K5 VOUT K4 VOUT K3 VOUT K2 VOUT K1 VOUT J11 VOUT J10 VOUT J9 VOUT J8 VOUT J7 VOUT ...

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