uModule Regulator. LTM8028 Datasheet

LTM8028 Regulator. Datasheet pdf. Equivalent


Part LTM8028
Description Low Output Noise 5A uModule Regulator
Feature LTM8028 36VIN, UltraFast, Low Output Noise 5A µModule Regulator Features n High Performance 5A Lin.
Manufacture Linear Technology
Datasheet
Download LTM8028 Datasheet


LTM8028 36VIN, UltraFast, Low Output Noise 5A µModule Regula LTM8028 Datasheet
Recommendation Recommendation Datasheet LTM8028 Datasheet




LTM8028
LTM8028
36VIN, UltraFast,
Low Output Noise 5A
µModule Regulator
Features
n High Performance 5A Linear Regulator with
Switching Step-Down Converter for High Efficiency
n Digitally Programmable VOUT: 0.8V to 1.8V
n Input Voltage Range: 6V to 36V
n Very Tight Tolerance Over Temperature, Line, Load
and Transient Response
n Low Output Noise: 40μVRMS (10Hz to 100kHz)
n Parallel Multiple Devices for 10A or More
n Accurate Programmable Current Limit to Allow
Asymmetric Power Sharing
n Analog Output Margining: ±10% Range
n Synchronization Input
n Stable with Low ESR Ceramic Output Capacitors
n 15mm × 15mm × 4.92mm Surface Mount
BGA Package
n SnPb or RoHS Compliant Finish
Applications
n FPGA and DSP Supplies
n High Speed I/O
n ASIC and Microprocessor Supplies
n Servers and Storage Devices
Description
The LTM®8028 is a 36VIN, 5A µModule® regulator, con-
sisting of an UltraFast™ 5A linear regulator preceded by a
high efficiency switching regulator. In addition to providing
tight output regulation, the linear regulator automatically
controls the output voltage of the switcher to provide
optimal efficiency and headroom for dynamic response.
The output voltage is digitally selectable in 50mV incre-
ments over a 0.8V to 1.8V range. An analog margining
function allows the user to adjust system output voltage
over a continuous ±10% range, and a single-ended feed-
back sense line may be used to mitigate IR drops due to
parasitic resistance.
The LTM8028 is packaged in a compact (15mm × 15mm ×
4.92mm) overmolded ball grid array (BGA) package suit-
able for automated assembly by standard surface mount
equipment. The LTM8028 is available with SnPb (BGA) or
RoHS compliant terminal finish.
L, LT, LTC, LTM, µModule, Linear Technology and the Linear logo are registered trademarks
and UltraFast is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Click to view associated TechClip Videos.
Typical Application
Low Output Noise, 1.2V, 5A µModule Regulator
VIN
9V TO 15V
10µF
150k
0.01µF
VIN
RUN
MARGA
IMAX
SS
82.5k
RT
SYNC
f = 500kHz
LTM8028
GND
LINEAR
VOUT
REGULATOR SENSEP
BKV
PGOOD
VOB VO0 VO1 VO2
+ 100µF
470µF
VOUT
1.2V
5A
137µF
VOUT
20mV/DIV
IOUT
2A/DIV
∆IOUT = 0.5A TO 5A
1µs RISE/FALL TIME
8028 TA01a
FULL LOAD
NOISE AND RIPPLE
500µV/DIV
For more information www.linear.com/LTM8028
10µs/DIV
1µs/DIV
MEASURED PER AN70, 150MHz BW
8028 TA01b
8028fb
1



LTM8028
LTM8028
Absolute Maximum Ratings
(Notes 1, 4)
VIN.............................................................................40V
VOUT.............................................................................3V
RUN, SS, SYNC ...........................................................6V
Current Into RUN...................................................100μA
VOB, VO0, VO1, VO2, TEST,
PGOOD, SENSEP, MARGA............................................4V
RT, BKV, IMAX..............................................................3V
Maximum Operating Junction Temperature
(Note 2).................................................................. 125°C
Peak Solder Reflow Body Temperature.................. 245°C
Maximum Storage Temperature............................. 125°C
Pin Configuration
TOP VIEW
11
10
9
SENSEP
8
TEST
7
PGOOD
VO1
VOB
MARGA
VO0
VO2
6
5
4
BANK 1 VOUT
BANK 2
BKV
BANK 3
GND
3
2
SS SYNC
BANK 4
1
IMAX RT RUN
ABCDE FGHJ
BGA PACKAGE
114 PADS (15mm × 15mm × 4.92mm)
TJMAX = 125°C, θJA = 17.7°C/W,
θJB = 6.0°C/W, θJCtop = 15°C/W,
θJCbottom = 6.0°C/W
θ VALUES DETERMINED PER JEDEC 51-9, 51-12
WEIGHT = 1.8 GRAMS
VIN
KL
Order Information
PART NUMBER
LTM8028EY#PBF
LTM8028IY#PBF
LTM8028IY
LTM8028MPY#PBF
LTM8028MPY
PAD OR BALL FINISH
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
SAC305 (RoHS)
SnPb (63/37)
PART MARKING*
DEVICE
FINISH CODE
LTM8028Y
e1
LTM8028Y
e1
LTM8028Y
e0
LTM8028Y
e1
LTM8028Y
e0
PACKAGE
TYPE
BGA
BGA
BGA
BGA
BGA
MSL
RATING
3
3
3
3
3
TEMPERATURE RANGE
(Note 2)
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
Consult Marketing for parts specified with wider operating temperature
ranges. *Device temperature grade is indicated by a label on the shipping
container. Pad or ball finish code is per IPC/JEDEC J-STD-609.
• Pb-free and Non-Pb-free Part Markings:
www.linear.com/leadfree
• Recommended LGA and BGA PCB Assembly and Manufacturing
Procedures:
www.linear.com/umodule/pcbassembly
• LGA and BGA Package and Tray Drawings:
www.linear.com/packaging
E lectrical Characteristics The l denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, RUN = 3V unless otherwise noted. (Note 2)
PARAMETER
CONDITIONS
MIN TYP MAX
Minimum Input Voltage
6
Output DC Voltage
l 0.788 0.8 0.812
l 0.985 1.0 1.015
l 1.182 1.2 1.218
l 1.477 1.5 1.523
l 1.773 1.8 1.827
Output DC Current
VOUT = 1.8V
5
2 For more information www.linear.com/LTM8028
UNITS
V
V
V
V
V
V
A
8028fb







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