LTM4656/LTM4656-1
Synchronous Boost µModule Regulator
with Input-Output Short Protection
FEATURES
DESCRIPTION
The LTM®4656 is a complete high efficiency boost
µModule® (power module) regulator with the switch-
ing controller, power FETs, inductor, and all supporting
components. Only a few input and output capacitors are
needed. Operating over an input voltage range of 4.5V to
28V, the LTM4656 supports an output voltage range of 6V
to 36V, set by a single external resistor. Its high efficiency
design delivers up to 5A continuous output current. An
in-line protection circuit sets the maximum input current,
and will trip off the input power if exceeded and retry (see
Typical Applications section).
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Complete Boost Switch Mode Power Supply
Wide Input Voltage Range: 4.5V to 28V
Output Voltage Range: 6V to 36V
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4A Continuous Output Current (12V , 24V
)
IN
OUT
2% Maximum Total Output Voltage Regulation
Over Load, Line and Temperature
Input Disconnect in Shutdown
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Inrush Current Limit
External Frequency Synchronization
Programmable Frequency (350kHz to 780kHz)
Parallel Current Sharing
Up to 98% Efficiency
The high density boost design can convert up to 180W
of output power.
Selectable Burst Mode® Operation
In-Line Overcurrent Protection
Fault protection features include overtemperature pro-
tection, and overcurrent protection input referred with
auto-retry. The µmodule is offered in a space saving
and thermally enhanced 16mm × 16mm × 7.07mm BGA
package. The LTM4656 is Pb-free and RoHS compliant.
Overtemperature Protection
LTM4656-1 Adjustable Compensation Version
16mm × 16mm × 7.07mm BGA Package
APPLICATIONS
All registered trademarks and trademarks are the property of their respective owners. Protected
by U. S. Patents, including 5408150, 5481178, 5705919, 5929620, 6177787, 6498466,
6580258, 6611131.
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Telecom and Networking Equipment
Electronic Test Equipment
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TYPICAL APPLICATION
12VIN, 24VOUT at 4A
ꢀꢁꢂ ꢃRꢄꢅꢆꢇꢅꢆꢈ
24V Output Efficiency at 550kHz
ꢀ00
ꢀꢁ
ꢀꢁ
ꢀꢁ
ꢀꢁ
ꢀ0
ꢀꢀ
ꢀꢁ
ꢀꢁ
ꢀꢁ
ꢀ0
ꢀ.ꢁ
ꢀ.0
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0.ꢀ
0
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ꢀ
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ꢁꢂ
ꢄꢄ
ꢀꢁꢂꢃ
ꢄꢄ
ꢀꢁꢁꢂꢃꢂꢀꢄꢃꢅ
SHDN
ꢀ.ꢁꢂꢃ
ꢀ.ꢁꢂ
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ꢀ ꢁ
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0.ꢀꢁꢂ
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ꢀ00ꢁꢂ
ꢀꢁꢂꢃꢄꢅꢄ
FLT
ꢀꢁꢂ ꢃꢄ ꢁꢃ
ꢀ
ꢄꢅꢀ
ꢁꢂꢃ
ꢀ
ꢁꢂꢃ
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ꢀꢁꢂꢃꢄꢅꢆꢆꢇꢈ
ꢄꢄ
ꢀ
ꢁꢂ
ꢀ0ꢁꢂ
ꢀ0ꢁꢂ
ꢀꢁ0ꢂꢃ
Rꢀ
ꢁꢁ.ꢂꢃ
ꢀRꢁꢂ
ꢀ0.ꢁꢂ
ꢀꢁꢂꢃ
0
0.ꢀ
ꢀ
ꢀ.ꢁ
ꢀ
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ꢀꢁꢂꢃ
ꢀꢁꢂꢃꢁꢂ ꢄꢁRRꢅꢆꢂ ꢇꢈꢉ
ꢀꢁꢂꢁ ꢃꢄ0ꢅꢆ
ꢀꢁꢂꢁ ꢃꢄ0ꢅꢆ
PINS UNUSED IN THIS APPLICATION:
ꢀꢁ ꢀꢂꢃꢄ ꢃꢁꢅꢆꢀꢁR
ꢃꢇRꢈ Rꢉꢊꢈ ꢋꢌꢇꢍꢈ ꢎꢏꢊꢎꢏꢅꢈ ꢎꢐ
Rev. 0
1
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