Datasheet Linear Technology LTM8048

Manufacturer	Linear Technology
Series	LTM8048

3.1VIN to 32VIN Isolated µModule (Power Module) DC/DC Converter with LDO Post Regulator

Datasheets

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PDF, 267 Kb, Revision: G, File uploaded: Sep 25, 2017

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Packaging

	LTM8048EY#PBF	LTM8048IY	LTM8048IY#PBF	LTM8048MPY	LTM8048MPY#PBF
N	1	2	3	4	5
Package	11.25mm x 9mm x 4.92mm BGA Package Outline Drawing	11.25mm x 9mm x 4.92mm BGA Package Outline Drawing	11.25mm x 9mm x 4.92mm BGA Package Outline Drawing	11.25mm x 9mm x 4.92mm BGA Package Outline Drawing	11.25mm x 9mm x 4.92mm BGA Package Outline Drawing
Package Code	BGA	BGA	BGA	BGA	BGA
Package Index	05-08-1869	05-08-1869	05-08-1869	05-08-1869	05-08-1869
Pin Count	45	45	45	45	45

Parametrics

Parameters / Models	LTM8048EY#PBF	LTM8048IY	LTM8048IY#PBF	LTM8048MPY	LTM8048MPY#PBF
Architecture	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode	Variable Frequency Current Mode
Demo Boards	DC1560A	DC1560A	DC1560A	DC1560A	DC1560A
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File
Export Control	no	no	no	no	no
Features	Isolated Module, LDO	Isolated Module, LDO	Isolated Module, LDO	Isolated Module, LDO	Isolated Module, LDO
Integrated Inductor	yes	yes	yes	yes	yes
Ishutdown, µA	1	1	1	1	1
Isupply, mA	0.85	0.85	0.85	0.85	0.85
Max Phases	1	1	1	1	1
Monolithic	yes	yes	yes	yes	yes
Number of Outputs	2	2	2	2	2
Operating Temperature Range, °C	0 to 85	-40 to 85	-40 to 85	-55 to 125	-55 to 125
Output Current, A	0.44	0.44	0.44	0.44	0.44
Polyphase	no	no	no	no	no
Synchronous	no	no	no	no	no
Topology	Flyback, LDO	Flyback, LDO	Flyback, LDO	Flyback, LDO	Flyback, LDO
Topology 1	Buck	Buck	Buck	Buck	Buck
Topology 2	LDO	LDO	LDO	LDO	LDO
Vin Max, V	32	32	32	32	32
Vin Min, V	3.1	3.1	3.1	3.1	3.1
Vout Max, V	13	13	13	13	13
Vout Maximum	13V	13V	13V	13V	13V
Vout Min, V	1.2	1.2	1.2	1.2	1.2
Vref Accuracy Over Temp, %	2.5	2.5	2.5	2.5	2.5

Eco Plan

	LTM8048EY#PBF	LTM8048IY	LTM8048IY#PBF	LTM8048MPY	LTM8048MPY#PBF
RoHS	Compliant	Not Compliant	Compliant	Not Compliant	Compliant

Design Notes

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Increasing Output Voltage and Current Range Using Series- Connected Isolated ОјModule Converters &mdash DN530
PDF, 172 Kb, File published: Jul 22, 2014
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Increasing Output Voltage and Current Range Using SeriesConnected Isolated ВµModule Converters вЂ“ Design Note 530
Jesus Rosales and Willie Chan
Linear TechnologyвЂ™s isolated ВµModule В® converters
are compact solutions for breaking ground loops.
These converters employ a flyback architecture whose
maximum output current varies with input voltage and
output voltage. Although their output voltage range
is limited to a maximum of 12V, one can increase the
output voltage or the output current range. The solution simply involves connecting the secondary side
of two or more isolated ВµModule converters in series.
The LTM В®8057 and LTM8058 UL60950-recognized
2kV AC isolated ВµModule converters will be used to
demonstrate this design approach, which can also be
applied to the LTM8046, LTM8047 and LTM8048. LetвЂ™s
assume an output of 10V at 300mA is desired from
a 20V input. Reviewing the maximum output current
curve from Figure 1, we notice that a single LTM8057
is insufficient to meet the output current requirement
under these conditions.
However, upon noticing that a single LTM8057 can
deliver 300mA at 5V from a 20V input, a solution becomes apparent. Since the output voltage is isolated
from the input, the outputs of two LTM8057s set at
5V can be connected in series to achieve a 10V output …

Articles

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µModule Converters Take the Hassle Out of Designing Isolated Power Supplies &mdash LT Journal
PDF, 2.1 Mb, File published: Apr 24, 2012
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design ideas ВµModule Converters Take the Hassle Out of Designing
Isolated Power Supplies
David Ng Sometimes a system needs a little bit of isolated power, but designing an isolated power
supply is rarely easy. The nature of isolated supplies makes them complicated and touchy,
resulting in late nights and long weekends spent on design and debug. The LTM8047
and LTM8048 ВµModule converters take the hassle out of designing isolated power
supplies, placing a flyback regulator in a compact 9mm Г— 11.25mm Г— 4.92mm BGA
RoHS compliant package. The controller, power switching and rectification elements,
as well as transformer and isolated feedback circuitry are all integrated. Both parts
operate from 3.1V to 32V inputs and produce over 1W of isolated power. The LTM8048
is identical to the LTM8047, but adds an integrated 300mA linear post regulator. The linear post regulator integrated
into the LTM8048 is a high performance 300m A device, boasting a low
dropout of less than 450mV at room
temp, full load. As shown in Figure 4,
the output noise and ripple of the post LTM8047
VIN 2.2ВµF RUN
BIAS 4.7ВµF 7.15k LTspice IV ADJ circuits.linear.com/553 VOUT
5V
280mA
(15VIN) VOUT
ISOLATION BARRIER VIN
3.1V TO 29V SS
GND 22ВµF VOUTвЂ“ 725VDC ISOLATION Figure 2. The LTM8048 is the …

Model Line

Series: LTM8048 (5)

LTM8048EY#PBF LTM8048IY LTM8048IY#PBF LTM8048MPY LTM8048MPY#PBF

Manufacturer's Classification

µModule Solutions > µModule Regulators > Isolated µModule Converters | Extended Temperature (H & MP) µModule Regulators