LTM4603EV#PBF Linear Technology, LTM4603EV#PBF Datasheet - Page 9

• Manufacturer Part Number: LTM4603EV#PBF
• Description: IC DC/DC UMODULE 6A 118-LGA
• Manufacturer: Linear Technology
• Series: µModuler
• Type: Point of Load (POL) Non-Isolatedr

Specifications of LTM4603EV#PBF

• Design Resources: LTM4603 Spice Model
• Output: 0.6 ~ 5 V
• Number Of Outputs: 1
• Power (watts): 30W
• Mounting Type: Surface Mount
• Voltage - Input: 4.5 ~ 20V
• Package / Case: 118-LGA
• 1st Output: 0.6 ~ 5 VDC @ 6A
• Size / Dimension: 0.59" L x 0.59" W x 0.11" H (15mm x 15mm x 2.8mm)
• Power (watts) - Rated: 30W
• Operating Temperature: -40°C ~ 85°C
• Efficiency: 93%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 2nd Output: -

Power Module Description
The LTM4603 is a standalone nonisolated switching mode
DC/DC power supply. It can deliver up to 6A of DC output
current with few external input and output capacitors.
This module provides precisely regulated output voltage
programmable via one external resistor from 0.6V
5.0V
application schematic is shown in Figure 18.
The LTM4603 has an integrated constant on-time current
mode regulator, ultralow R
speed and integrated Schottky diodes. The typical switching
frequency is 1MHz at full load. With current mode control
and internal feedback loop compensation, the LTM4603
module has suffi cient stability margins and good transient
performance under a wide range of operating conditions
and with a wide range of output capacitors, even all ceramic
output capacitors.
Current mode control provides cycle-by-cycle fast current
limit. Besides, foldback current limiting is provided in an
overcurrent condition while V
and undervoltage comparators pull the open-drain PGOOD
output low if the output feedback voltage exits a ±10%
window around the regulation point. Furthermore, in an
overvoltage condition, internal top FET Q1 is turned off
DECOUPLING REQUIREMENTS
SYMBOL
C
C
OPERATION
IN
OUT
DC
over a 4.5V to 20V wide input voltage. The typical
PARAMETER
External Input Capacitor Requirement
(V
External Output Capacitor Requirement
(V
IN
IN
= 4.5V to 20V, V
= 4.5V to 20V, V
DS(ON)
FB
drops. Internal overvoltage
OUT
OUT
FETs with fast switching
= 1.5V)
= 1.5V)
CONDITIONS
I
I
OUT
OUT
T
DC
A
= 6A
= 6A
= 25°C, V
to
and bottom FET Q2 is turned on and held on until the
overvoltage condition clears.
Pulling the RUN pin below 1V forces the controller into its
shutdown state, turning off both Q1 and Q2. At low load
current, the module works in continuous current mode by
default to achieve minimum output voltage ripple.
When DRV
5V linear regulator powers the internal gate drivers. If a
5V external bias supply is applied on the DRV
an effi ciency improvement will occur due to the reduced
power loss in the internal linear regulator. This is especially
true at the higher input voltage range.
The LTM4603 has a very accurate differential remote
sense amplifi er with very low offset. This provides for
very accurate remote sense voltage measurement. The
MPGM pin, MARG0 pin and MARG1 pin are used to sup-
port voltage margining, where the percentage of margin
is programmed by the MPGM pin, and the MARG0 and
MARG1 select margining.
The PLLIN pin provides frequency synchronization of the
device to an external clock. The TRACK/SS pin is used for
power supply tracking and soft-start programming.
IN
= 12V. Use Figure 1 confi guration.
CC
pin is connected to INTV
LTM4603/LTM4603-1
MIN
100
20
TYP
200
CC
an integrated
MAX
CC
pin, then
UNITS
4603fa
9
μF
μF