Linear Technology LTM4628 Demo Board, Dual 26V, 8A Step-Down µModule Regulator DC1663A DC1663A 数据表

LTM4628

1

4628fe

For more information 

www.linear.com/LTM4628

Dual 8A or Single 16A  

DC/DC µModule Regulator

The 

 is a complete dual 8A output switching 

mode DC/DC power supply and can be easily configured 

to provide a single 2-phase 16A output. Included in the 

package are the switching controller, power FETs, inductor, 

and all supporting components. Operating from an input 

voltage range of 4.5V to 26.5V, the LTM4628 supports 

two outputs each with an output voltage range of 0.6V to 

5.5V, set by a single external resistor. Its high efficiency 

design delivers 8A continuous current for each output. 

Only a few input and output capacitors are needed.
The  device  supports  frequency  synchronization,  multi-

phase operation, Burst Mode operation and output voltage 

tracking  for  supply  rail  sequencing.  It  has  an  onboard 

temperature  diode  for  device  temperature  monitoring. 

High switching frequency and a current mode architec-

ture enable a very fast transient response to line and load 

changes without sacrificing stability. 
Fault protection features include overvoltage and over-

current protection. The power module is offered in space 

saving and thermally enhanced 15mm × 15mm × 4.32mm 

LGA and 15mm × 15mm × 4.92mm BGA packages. The 

LTM4628 is available with SnPb (BGA) or RoHS compli-

ant terminal finish.

L

, LT, LTC, LTM, Linear Technology, the Linear logo, µModule, Burst Mode and PolyPhase 

are registered and LTpowerCAD is a trademarks of Linear Technology Corporation. All other 

trademarks are the property of their respective owners.

®

n

  Complete Standalone Dual Power Supply 

n

  Single 16A or Dual 8A Output

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  Wide Input Voltage Range: 4.5V to 26.5V

n

  Output Voltage Range: 0.6V to 5.5V 

n

  ±1.5% Total DC Output Error 

n

  Differential Remote Sense Amplifier

n

  Current Mode Control/Fast Transient Response

n

  Adjustable Switching Frequency

n

  Overcurrent Foldback Protection

n

  Multiphase Parallel Current Sharing with 

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  Frequency Synchronization

n

  Internal Temperature Sensing Diode Output

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  Selectable Burst Mode

®

 Operation

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  Soft-Start/Voltage Tracking

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  Output Overvoltage Protection 

n

  Small Surface Mount Footprint, Low Profile 

15mm × 15mm × 4.32mm LGA and 

15mm × 15mm × 4.92mm BGA Packages

n

  Telecom and Networking Equipment

n

  Storage and ATCA Cards

n

  Industrial Equipment

4628 TA01a

LTM4628

V

IN

TEMP
RUN1
RUN2
TRACK1
TRACK2
f

SET

470µF

6.3V

40.2k

100µF

6.3V

PHASMD

V

OUT1

V

OUTS1

SW1

V

FB1

V

FB2

COMP1
COMP2

V

OUTS2

V

OUT2

V

OUT2

1.2V AT 8A

V

OUT1

1.5V AT 8A

SW2

PGOOD2

MODE_PLLIN CLKOUT INTV

CC

EXTV

CC

PGOOD1

SGND

GND

DIFFP

DIFFN

DIFFOUT

60.4k

470µF

6.3V

100µF

6.3V

100k

10k

5.1V ZENER

*

*

* PULL-UP RESISTOR AND 

ZENER ARE OPTIONAL.

V

IN

4.5V TO 

26.5V

120k

0.1µF

10µF

35V

×4

4.7µF

LOAD CURRENT (A)

0

EFFICIENCY (%)

POWER LOSS (W)

95

90

80

85

75

70

65

60

55

50

2.0

1.8

1.4

1.2

1.6

1.0

0

0.2

0.4

0.6

0.8

4

2

4628 TA01b

8

3

1

5

6

7

POWER LOSS

EFFICIENCY

1.2V 

1.5V