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Linear Technology Electronic Components Datasheet

LTM4623 Datasheet

3A Step-Down DC/DC uModule Regulator

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LTM4623
Ultrathin 20VIN, 3A Step-Down
DC/DC µModule Regulator
FEATURES
n <2mm Height, Complete Solution in <1cm2
(Single-Sided PCB) or 0.5cm2 (Dual-Sided PCB)
n Wide Input Voltage Range: 4V to 20V
n Input Voltage Down to 2.375V with External Bias
n 0.6V to 5.5V Output Voltage
n 3A DC Output Current
n ±1.5% Maximum Total DC Output Voltage Error
n Current Mode Control, Fast Transient Response
n Low EMI EN55022 Class B Compliant
n External Frequency Synchronization
n Multiphase Operation with Current Sharing
n Output Voltage Tracking
n Selectable Discontinuous Mode
n Power Good Indicator
n Overvoltage, Overcurrent and Overtemperature Pro-
tection
n Ultrathin (6.25mm × 6.25mm × 1.82mm) LGA Package
and (6.25mm × 6.25mm × 2.42mm) BGA Package
APPLICATIONS
n PCIe and Backside PCB Mounting
n Telecom, Datacom, Networking and Industrial
Equipment
n Data Storage Rack Units and Cards
DESCRIPTION
The LTM®4623 is a complete 3A step-down switching
mode µModule (micromodule) regulator in a tiny ultrathin
6.25mm × 6.25mm × 1.82mm LGA and 6.25mm×6.25mm
× 2.42mm BGA packages. Included in the package are the
switching controller, power FETs, inductor and support
components. Operating over an input voltage range of
4V to 20V or 2.375V to 20V with an external bias supply,
the LTM4623 supports an output voltage range of 0.6V to
5.5V, set by a single external resistor. Its high efficiency
design delivers 3A continuous output current. Only ceramic
input and output capacitors are needed.
The LTM4623 supports selectable discontinuous mode
operation and output voltage tracking for supply rail se-
quencing. Its high switching frequency and current mode
control enable a very fast transient response to line and
load changes without sacrificing stability.
Fault protection features include overvoltage, overcurrent
and overtemperature protection.
The LTM4623 is available with SnPb (BGA) or RoHS
compliant terminal finish.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
3A, 1.5V Output DC/DC µModule® Step-Down Regulator
VIN
4V TO 20V
10µF
25V
0.1µF
CLKIN CLKOUT
VIN VOUT
SVIN
RUN LTM4623
INTVCC
PGOOD
MODE
COMP
PHMODE
FB
TRACK/SS
FREQ
GND SGND
VOUT
47µF
6.3V
1.5V
3A
40.2k
4623 TA01a
1.5V Output Efficiency vs Load Current
95
90
85
80
75
70
65 VIN = 5V
VIN = 12V
60
0 0.5 1 1.5 2 2.5 3
LOAD CURRENT (A)
4623 TA01b
Document Feedback
For more information www.analog.com
Rev D
1


Linear Technology Electronic Components Datasheet

LTM4623 Datasheet

3A Step-Down DC/DC uModule Regulator

No Preview Available !

LTM4623
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VIN, SVIN .................................................... –0.3V to 22V
VOUT.................................................–0.3V to SVIN or 6V
RUN ........................................................... –0.3V to 22V
INTVCC ...................................................... –0.3V to 3.6V
PGOOD, MODE, TRACK/SS, FREQ,
PHMODE, CLKIN .................................. –0.3V to INTVCC
Internal Operating Junction Temperature Range
(Notes 2, 5)............................................ –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
Peak Solder Reflow Body Temperature ................. 260°C
PIN CONFIGURATION
(See Pin Functions, Pin Configuration Table)
TOP VIEW
CLKOUT
CLKIN
SVIN
SGND 5
FREQ 4
RUN
PHMODE 3
TRACK/SS
FB
2
COMP 1
VIN
MODE
INTVCC
GND
PGOOD
VOUT
ABCDE
LGA PACKAGE 25-LEAD (6.25mm × 6.25mm × 1.82mm)
BGA PACKAGE 25-LEAD (6.25mm × 6.25mm × 2.42mm)
TJMAX = 125°C, θJCtop = 17°C/W, θJCbottom = 11°C/W,
θJB + θBA = 22°C/W, θJA = 22°C/W,
θJA DERIVED FROM 95mm × 76mm PCB WITH 4 LAYERS
θ VALUES DETERMINED PER JESD51-12, WEIGHT = 0.5g
ORDER INFORMATION
PART NUMBER
PAD OR BALL FINISH
PART MARKING*
DEVICE
FINISH CODE
PACKAGE
TYPE
MSL
RATING
TEMPERATURE RANGE
(Note 2)
LTM4623EV#PBF
Au (RoHS)
LTM4623V
e4
LGA 3 –40°C to 125°C
LTM4623IV#PBF
Au (RoHS)
LTM4623V
e4
LGA 3 –40°C to 125°C
LTM4623EY#PBF
SAC305 (RoHS)
LTM4623Y
e1
BGA
3 –40°C to 125°C
LTM4623IY#PBF
SAC305 (RoHS)
LTM4623Y
e1
BGA
3 –40°C to 125°C
LTM4623IY
SnPb (63/37)
LTM4623Y
e0
BGA
3 –40°C to 125°C
• Consult Marketing for parts specified with wider operating temperature
ranges. *Pad or ball finish code is per IPC/JEDEC J-STD-609.
Recommended LGA and BGA PCB Assembly and Manufacturing
Procedures
LGA and BGA Package and Tray Drawings
Rev D
2 For more information www.analog.com


Part Number LTM4623
Description 3A Step-Down DC/DC uModule Regulator
Maker Linear Technology
Total Page 28 Pages
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