Linear Technology LTM4613EV Demo Board: Ultralow EMI, 36V, 8A Step-down µModule Regulator DC1743A DC1743A Ficha De Dados
Códigos do produto
DC1743A
LTM4613
1
4613f
PGOOD
RUN
COMP
INTV
RUN
COMP
INTV
CC
DRV
CC
f
SET
TRACK/SS
FCB
MARG0
MARG1
MARG1
MPGM
V
OUT
V
FB
V
IN
0.1µF
10µF
× 3
22pF
C
OUT
V
OUT
12V
8A
C
IN
V
IN
24V
TO 36V
PLLIN
CLOCK SYNC
LTM4613
SGND
V
D
PGND
MARGIN
CONTROL
51k
5.23k
392k
5% MARGIN
4613 TA01
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
EN55022B Compliant
36V
IN
, 15V
OUT
, 8A,
DC/DC µModule Regulator
The LTM
®
4613 is a complete, ultralow noise, 8A switch
mode DC/DC power supply. Included in the package are the
switching controller, power FETs, inductor and all support
components. Operating over an input voltage range of 5V
to 36V, the LTM4613 supports an output voltage range of
3.3V to 15V, set by a single external resistor. Only bulk
input and output capacitors are needed to finish the design.
High switching frequency and an adaptive on-time current
High switching frequency and an adaptive on-time current
mode architecture enables a very fast transient response
to line and load changes without sacrificing stability.
The onboard input filter and noise cancellation circuits
The onboard input filter and noise cancellation circuits
achieve low noise coupling, thus effectively reducing
the electromagnetic interference (EMI)—see Figure 7.
Furthermore, the DC/DC µModule
®
regulator can be syn-
chronized with an external clock to reduce undesirable
frequency harmonics and allow PolyPhase
®
operation for
high load currents.
The LTM4613 is offered in a space saving and thermally
The LTM4613 is offered in a space saving and thermally
enhanced 15mm
× 15mm × 4.32mm LGA package, which
enables utilization of unused space on the bottom of PC
boards for high density point-of-load regulation. The
LTM4613 is Pb-free and RoHS compliant.
12V/8A Ultralow Noise µModule with 24V to 36V Input
n
Complete Low EMI Switch Mode Power Supply
n
EN55022 Class B Compliant
n
Wide Input Voltage Range: 5V to 36V
n
8A Output Current
n
3.3V to 15V Output Voltage Range
n
Low Input and Output Referred Noise
n
Output Voltage Tracking and Margining
n
PLL Frequency Synchronization
n
2% Maximum Total DC Error
n
Power Good Tracks with Margining
n
Current Foldback Protection
n
Parallel/Current Sharing
n
Ultrafast Transient Response
n
Current Mode Control
n
Programmable Soft-Start
n
Output Overvoltage Protection
n
–55°C to 125°C Operating Temperature Range
(LTM4613MPV)
n
Small Surface Mount Footprint, Low Profile
(15mm
× 15mm × 4.32mm) LGA Package
n
Telecom and Networking Equipment
n
Industrial and Avionic Equipment
n
RF Systems
Radiated Emission Scan with 24V
IN
to 12V
OUT
at 8A
L
, LT, LTC, LTM, µModule, PolyPhase, Linear Technology, and the Linear logo are registered
trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
70
60
50
40
30
SIGNAL AMPLITUDE (dB uV
/m)
20
10
0
30
226.2
422.4
613.6
FREQUENCY (MHz)
4613 TA01b
814.3
1010.0
–10
EN55022B LIMIT