LTM4604A
Low Voltage, 4A DC/DC
Module Regulator with Tracking
Fea T Descrip T
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Complete Standalone Power Supply
The LTM 4604A is a complete 4A switch mode step-down
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1.75% Max Total DC Output Error (40C to 125C)
Module (micromodule) regulator with 1.75% maximum
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Wide Input Voltage Range: 2.375V to 5.5V
total output voltage error. Included in the package are the
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4A DC, 5A Peak Output Current
switching controller, power FETs, inductor and all support
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0.8V to 5V Output
components. Operating over an input voltage range of
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Output Voltage Tracking
2.375V to 5.5V, the LTM4604A supports an output volt-
TM
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UltraFast Transient Response
age range of 0.8V to 5V, set by a single resistor. This high
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Power Good Indicator
efficiency design delivers up to 4A continuous current
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Current Mode Control
(5A peak). Only input and output capacitors are needed
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Current Foldback Protection, Parallel/Current Sharing
to complete the design.
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Up to 95% Efficiency
The 0.630mm LGA pads with 1.27mm pitch simplify
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Programmable Soft-Start
PCB layout by providing standard trace routing and via
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Micropower Shutdown: I 7A
Q
placement. (The LTM4604A has smaller pads than the
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Overtemperature Protection
LTM4604). The low profile package enables utilization of
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9mm 15mm 2.32mm LGA and
unused space on the bottom of PC boards for high density
9mm 15mm 3.42mm BGA Packages
point of load regulation. High switching frequency and
a current mode architecture enable a very fast transient
a T
response to line and load changes without sacrificing
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Telecom and Networking Equipment
stability.
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Servers
Fault protection features include foldback current protec-
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Storage Cards
tion, thermal shutdown and a programmable soft-start
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ATCA Cards
function. The LTM4604A is offered with SnPb (BGA) or
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Industrial Equipment
RoHS-compliant terminal finish.
L, LT, LTC, LTM, Linear Technology, LTspice, Module and the Linear logo are registered
trademarks and UltraFast and LTpowerCAD are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Typical a T Efficiency vs Output Current
100
3.3V to 2.5V/4A Module Regulator V = 3.3V
IN
V = 2.5V
OUT
95
V
IN
3.3V
90
10F
85
6.3V
V
IN
V
OUT
80
2.5V
PGOOD V
OUT
4A
LTM4604A
75
22F
COMP FB
6.3V
V
RUN/SS TRACK 70
IN
2
2.37k
GND
65
4604A TA01a
0 1 2 3 4
OUTPUT CURRENT (A)
4604A TA01b
4604afc
1
For more information www.linear.com/LTM4604A
EFFICIENCY (%)
ion pplica
ions pplica
ion uresLTM4604A
a T e Maxi Mu M r a T (Note 1)
V , PGOOD ................................................. 0.3V to 6V Internal Operating Temperature Range
IN
COMP, RUN/SS, FB, TRACK ........................ 0.3V to V (Note 2) .................................................. 40C to 125C
IN
SW, V ...................................... 0.3V to (V + 0.3V) Storage Temperature Range .................. 55C to 125C
OUT IN
Peak Solder Reflow Body Temperature ................. 245C
p c F T
TOP VIEW TOP VIEW
TRACK PGOOD TRACK PGOOD
A B C D E F G A B C D E F G
V V
IN IN
1 COMP 1 COMP
RUN/ RUN/
2 FB 2 FB
SW SW
SS SS
3 3
GND GND
4 4
5 5
6 6
7 7
8 8
9 9
10 10
11 11
GND V GND V
OUT OUT
BGA PACKAGE LGA PACKAGE
66-PIN (15mm 9mm 3.42mm) 66-PIN (15mm 9mm 2.32mm) 0.630mm PAD
T = 125C, = 25C/W, = 7C/W, = 50C/W, WEIGHT = 1.1g T = 125C, = 25C/W, = 7C/W, = 50C/W, WEIGHT = 1.0g
JMAX JA JC(BOTTOM) JC(TOP) JMAX JA JC(BOTTOM) JC(TOP)
o r D i n F Ma T
PART NUMBER PAD OR BALL FINISH PART MARKING* PACKAGE MSL TEMPERATURE RANGE
TYPE RATING (SEE NOTE 2)
DEVICE FINISH CODE
LTM4604AEV#PBF Au (RoHS) LTM4604AV e4 LGA 3 40C to 125C
LTM4604AIV#PBF Au (RoHS) LTM4604AV e4 LGA 3 40C to 125C
LTM4604AEY#PBF SAC305 (RoHS) LTM4604AY e1 BGA 3 40C to 125C
LTM4604AIY#PBF SAC305 (RoHS) LTM4604AY e1 BGA 3 40C to 125C
LTM4604AIY SnPb (63/37) LTM4604AY e0 BGA 3 40C to 125C
Consult Marketing for parts specified with wider operating temperature Recommended LGA and BGA PCB Assembly and Manufacturing
ranges. *Device temperature grade is indicated by a label on the shipping
Procedures:
container. Pad or ball finish code is per IPC/JEDEC J-STD-609. www.linear.com/umodule/pcbassembly
LGA and BGA Package and Tray Drawings:
Terminal Finish Part Markings: