LTM4618 Datasheet PDF - Linear
| Part Number | LTM4618 | |
| Description | 6A DC/DC uModule Regulator | |
| Manufacturers | Linear | |
| Logo |  |
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LTM4618
6A DC/DC µModule
Regulator with Tracking and
Frequency Synchronization
FEATURES
DESCRIPTION
n Complete Standalone Power Supply
n Wide Input Voltage Range: 4.5V to 26.5V
n 6A DC Typical, 8A Peak Output Current
n 0.8V to 5V Output
n Output Voltage Tracking
n ±1.75% Maximum Total DC Error
n Current Mode Control/Fast Transient Response
n Phase-Lockable Fixed Frequency 250kHz to 780kHz
n On-Board Frequency Synchronization
n Selectable Burst Mode® Operation
n Power Good Voltage Indicator
n Output Overvoltage Protection
n Output Current Foldback Limiting
n 9mm × 15mm × 4.32mm LGA Package
APPLICATIONS
n Telecom and Networking Equipment
n Servers
n Storage Cards
n ATCA Cards
n Industrial Equipment
n Point of Load Regulation
n Medical Systems
The LTM®4618 is a complete 6A output switching mode
DC/DC power supply in a 9mm × 15mm × 4.32mm LGA
package. Included in the package are the switching con-
troller, power FETs, inductor and all support components.
Operating over an input voltage range of 4.5V to 26.5V,
the LTM4618 supports an output voltage range of 0.8V
to 5V set by a single external resistor. Its high efficiency
design delivers 6A continuous current (8A peak). Only a
few input and output capacitors are needed.
High switching frequency and a current mode architecture
enable a very fast transient response to line and load
changes without sacrificing stability. The device supports
frequency synchronization and output voltage tracking for
supply rail sequencing. Burst Mode operation or pulse-
skipping mode can be selected for light load operations.
Fault protection features include overvoltage protection,
overcurrent protection and foldback current limit for
short-circuit protection.
The LTM4618 is Pb-free and RoHS compliant.
L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and μModule are registered
trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
TYPICAL APPLICATION
2.5V/6A DC/DC Power μModule® with 6V to 26.5V Input
VIN
6V to 26.5V
CIN
0.1μF
MODE/PLLIN INTVCC EXTVCC
VIN FREQ
COMP
TK/SS
LTM4618
VOUT
VFB
RUN
SGND
PGOOD
PGND
4618 TA01
28.7k
VOUT
2.5V/6A
COUT
Efficiency and Power Loss vs Load Current
95 3.0
EFFICIENCY
90
2.5
2.0
85
1.5
80
1.0
POWER LOSS
75 0.5
12VIN TO 2.5VOUT
24VIN TO 2.5VOUT
70 0
0123456
LOAD CURRENT (A)
4618 TA01b
4618fa
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TYPICAL PERFORMANCE CHARACTERISTICS
LTM4618
Efficiency vs Load Current with
5VIN (CCM)
100
Efficiency vs Load Current with
12VIN (CCM)
100
Efficiency vs Load Current with
24VIN (CCM)
95
95 95 90
90
85
80 5V TO 0.8VOUT
5V TO 1.2VOUT
75 5V TO 1.5VOUT
5V TO 2.5VOUT
5V TO 3.3VOUT
70
0123456
LOAD CURRENT (A)
4618 G01
90
85
80 12V TO 1.2VOUT
12V TO 1.5VOUT
75 12V TO 2.5VOUT
12V TO 3.3VOUT
12V TO 5VOUT
70
0123456
LOAD CURRENT (A)
4618 G02
85
80
75 24V TO 2.5VOUT
24V TO 3.3VOUT
24V TO 5VOUT
70
0123456
LOAD CURRENT (A)
4618 G03
Efficiency vs Load Current with
Different Mode Settings
(12V to 3.3V)
100
VIN = 12V
90 VOUT = 3.3V
80
70
60
50
40
30
20
10
0
0.01
BURST
PULSE SKIP
CCM
0.1
LOAD CURRENT (A)
1
4618 G04
1.2V Transient Response
1.5V Transient Response
IOUT
1A/DIV
IOUT
1A/DIV
VOUT
50mV/DIV
VOUT
50mV/DIV
50μs/DIV
4618 G05
VIN = 12V AND VOUT = 1.2V AT 3A/μs LOAD STEP
COUT = 2= 22μF 6.3V CERAMIC CAPACITOR
1= 100μF 6.3V CERAMIC CAPACITOR
1= 220μF SANYO POSCAP
50μs/DIV
4618 G06
VIN = 12V AND VOUT = 1.5V AT 3A/μs LOAD STEP
COUT = 2= 22μF 6.3V CERAMIC CAPACITOR
1= 100μF 6.3V CERAMIC CAPACITOR
1= 220μF SANYO POSCAP
2.5V Transient Response
3.3V Transient Response
5V Transient Response
IOUT
1A/DIV
IOUT
1A/DIV
IOUT
1A/DIV
VOUT
50mV/DIV
VOUT
50mV/DIV
VOUT
100mV/DIV
50μs/DIV
4618 G07
VIN = 12V AND VOUT = 2.5V AT 3A/μs LOAD STEP
COUT = 2= 22μF 6.3V CERAMIC CAPACITOR
1= 100μF 6.3V CERAMIC CAPACITOR
1= 220μF SANYO POSCAP
50μs/DIV
4618 G08
VIN = 12V AND VOUT = 3.3V AT 3A/μs LOAD STEP
COUT = 2= 22μF 6.3V CERAMIC CAPACITOR
1= 100μF 6.3V CERAMIC CAPACITOR
1= 220μF SANYO POSCAP
50μs/DIV
4618 G09
VIN = 12V AND VOUT = 5V AT 3A/μs LOAD STEP
COUT = 2= 22μF 6.3V CERAMIC CAPACITOR
1= 100μF 6.3V CERAMIC CAPACITOR
1= 220μF SANYO POSCAP
4618fa
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LTM4618 electronic component. |
| Information | Total 24 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ LTM4618.PDF Datasheet ] | |
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