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LTM8051EY Datasheet

Silent Switcher uModule Regulator

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LTM8051
Quad 40VIN Silent Switcher μModule Regulator
with Configurable 1.2A Output Array
FEATURES
DESCRIPTION
n Four Complete Step-Down Switching Power Supplies
n Low Noise Silent Switcher® Architecture
n CISPR22 Class B Compliant
n CISPR25 Class 5 Compliant
n Wide Input Voltage Range: 3V to 40V
n Wide Output Voltage Range: 0.8V to 8V
n 1.2A Continuous Output Current per Channel at
12VIN, 3.3VOUT, TA = 85°C
n 1.5A Continuous Output Current per Channel at
12VIN, 3.3VOUT, TA = 60°C
n Multiphase or Multi-µModule Parallelable for
Increased Output Current
n Selectable Switching Frequency: 300kHz to 3MHz
n Compact Package (6.25mm × 11.25mm × 2.22mm)
Surface Mount BGA
APPLICATIONS
n Automated Test Equipment
n Distributed Supply Regulation
n Industrial Supplies
n Medical Equipment
All registered trademarks and trademarks are the property of their respective owners.
Click to view associated Video Design Idea.
The LTM®8051 is quad 40VIN, 1.2A step-down Silent
Switcher μModule® regulator. The Silent Switcher archi-
tecture minimizes EMI while delivering high efficiency at
frequencies up to 3MHz. Included in the package are the
controllers, power switches, inductors, and support com-
ponents. Operating over a wide input voltage range, the
LTM8051 supports output voltages from 0.8V to 8V, and
a switching frequency range of 300kHz to 3MHz, each set
by a single resistor. Only the bulk input and output filter
capacitors are needed to finish the design. The LTM8051
product video is available on website.
The LTM8051 is packaged in a compact (6.25mm ×
11.25mm × 2.22mm) over-molded Ball Grid Array (BGA)
package suitable for automated assembly by standard
surface mount equipment. The LTM8051 is available with
SnPb (BGA) or RoHS compliant.
Configurable Output Array
The LTM8051 outputs can be paralleled in an array for up
to 4.8A capability.
1.2A
1.2A
2.4A
3.6A
1.2A
1.2A
4.8A
1.2A
1.2A
1.2A
TYPICAL APPLICATION
1.8-5VOUT from 7-40VIN Quad Step-Down Converter
VIN
7V to 40V
VIN1
RUN14
23.2k
RT14
fSW = 1.3MHz
SYNC14
BIAS14
VOUT1
FB1
47.5k
VOUT1
5V
47µF 1.2A
SHARE14
VCC14
VIN4
PINS NOT USED:
TRSS1, TRSS2,
TRSS3, TRSS4,
PG1, PG2, PG3,
PG4, CLKOUT14,
CLKOUT23
VIN23
RUN23
24.9k
RT23
fSW = 1.2MHz
SYNC23
SHARE23
VCC23
1µF
x4
VOUT4
FB4
GND
200k
VOUT4
1.8V
100µF 1.2A
BIAS23
VOUT2
FB2
78.7k
VOUT2
3.3V
100µF 1.2A
VOUT3
FB3
GND
118k
8051 TA01a
VOUT3
2.5V
100µF 1.2A
EEffficcieiennccy,y,VVININ==2244VV,,BBIIAASS==55VV
95
90
85
80
75
70
65
60
3.3VOUT
5VOUT
55
0
0.5
1
1.5
2
LOAD CURRENT (A)
8051 TA01b
Document Feedback
For more information www.analog.com
Rev. 0
1


Analog Devices Semiconductor Electronic Components Datasheet

LTM8051EY Datasheet

Silent Switcher uModule Regulator

No Preview Available !

LTM8051
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VINn, RUNn, PGn ......................................................42V
VOUTn, BIASn ............................................................10V
FBn, TRSSn, SHAREn , RTn, VCCn..............................4V
SYNCn ........................................................................6V
Maximum Internal Temperature (Note 2)............... 125°C
Storage Temperature ............................. –55°C to 125°C
Peak Solder Reflow Package Body Temperature ... 260°C
PIN CONFIGURATION
TOP VIEW
RUN23 RUN14 VIN1 VIN4
7
BANK2
VOUT2 CLKOUT23 CLKOUT14 SYNC23 SYNC14
6
BIAS23
5
VCC23
4
SHARE23
3
TRSS2 FB2
2
BANK3
1
VOUT3
TRSS3 FB3
BANK6
GND
BANK5
VIN23
PG3 PG4
PG2 PG1
TRSS1 TRSS4 FB1
RT23 RT14 FB4
BANK4
VOUT4
SHARE14
VCC14
BIAS14
BANK1
VOUT1
A
B
C
D
E
F
G
H
J
K
L
M
N
BGA PACKAGE
91-LEAD (11.25mm × 6.25mm × 2.22mm)
TJMAX = 125°C, θJA = 16°C/W, θJCtop = 11.4°C/W,
θJCbot = 3.5°C/W, WEIGHT = 0.42g
θ VALUES DETERMINED PER JEDEC 51-9, 51-12
ORDER INFORMATION
PART NUMBER
PAD OR BALL FINISH
PART MARKING*
DEVICE
FINISH CODE
PACKAGE
TYPE
MSL
RATING
TEMPERATURE RANGE
(SEE NOTE 2)
LTM8051EY#PBF
SAC305 (RoHS)
e1
LTM8051IY#PBF
LTM8051Y
BGA
3
–40°C to 125°C
LTM8051IY
SnPb (63/37)
e0
• Device temperature grade is indicated by a label on the shipping container. • This product is not recommended for second side reflow.
• Pad or ball finish code is per IPC/JEDEC J-STD-609.
This product is moisture sensitive. For more information, go to
Recommended BGA PCB Assembly and Manufacturing Procedures.
BGA Package and Tray Drawings
Rev. 0
2
For more information www.analog.com


Part Number LTM8051EY
Description Silent Switcher uModule Regulator
Maker Analog Devices
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