LTM4620AY Ver la hoja de datos (PDF) - Linear Technology

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Fabricante

LTM4620AY

Dual 13A or Single 26A DC/DC µModule Regulator

Linear Technology 

LTM4620A

Dual 13A or Single 26A

DC/DC µModule Regulator

FEATURES

DESCRIPTION

n Dual 13A or Single 26A Output

n Wide Input Voltage Range: 4.5V to 16V

n Output Voltage Range: 0.6V to 5.3V

n ±1.5% Maximum Total DC Output Error

n Multiphase Current Sharing with Multiple

LTM4620As Up to 100A

n Higher Efficiency and Wider VOUT Range Than LTM4620

n Differential Remote Sense Amplifier

n Current Mode Control/Fast Transient Response

n Adjustable Switching Frequency

n Overcurrent Foldback Protection

n Frequency Synchronization

n Internal Temperature Monitor

n Output Overvoltage Protection

n Pin Compatible with the LTM4628 (Dual 8A) and

LTM4620 (Dual 13A)

n Thermally Enhanced (15mm × 15mm × 4.41mm)

LGA Package and (15mm × 15mm × 5.01mm) BGA

Package

APPLICATIONS

n Telecom and Networking Equipment

n Industrial Equipment

L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule, Burst Mode, LTpowerCAD

and PolyPhase are registered trademarks of Analog Devices, Inc. All other trademarks are the

property of their respective owners. Protected by U.S. Patents, including 5481178, 5705919,

5929620, 6100678, 6144194, 6177787, 6304066 and 6580258. Other patents pending.

The LTM®4620A is a complete dual 13A, or single 26A out-

put switching mode DC/DC power supply with wider VOUT

range and higher efficiency than the LTM4620. Included

in the package are the switching controller, power FETs,

inductors and all supporting components. Operating from

an input voltage range of 4.5V to 16V, the LTM4620A

supports two outputs each with an output voltage range

of 0.6V to 5.3V, set by a single external resistor. Its high

efficiency design delivers up to 13A continuous current

for each output. Only a few input and output capacitors

are needed.

The device supports frequency synchronization, mul-

tiphase operation, Burst Mode® operation and output

voltage tracking for supply rail sequencing and has an

onboard temperature diode for device temperature mon-

itoring. High switching frequency and a current mode

architecture 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

a proprietary space saving and thermally enhanced

15mm × 15mm × 4.41mm LGA package and 15mm

× 15mm × 5.01mm BGA package. The LTM4620A is

available with SnPb (BGA) or RoHS compliant terminal

finish.

TYPICAL APPLICATION

26A, 5V Output DC/DC µModule® Regulator

VIN

7V TO 16V

10k*

22µF

25V 120k

×4

5.1V*

0.1µF INTVCC

* PULL-UP RESISTOR AND

ZENER ARE OPTIONAL

INTVCC

4.7µF

VOUT

INTVCC

5k

MODE_PLLIN CLKOUT INTVCC

VIN

TEMP

RUN1

RUN2

TRACK1

TRACK2

LTM4620A

fSET

PHASMD

SGND GND

DIFFP

EXTVCC PGOOD1

VOUT1

VOUTS1

DIFFOUT

SW1

VFB1

VFB2

COMP1

COMP2

VOUTS2

VOUT2

SW2

PGOOD2

DIFFN

PGOOD

100µF

6.3V

×2

220pF

8.25k

PGOOD

100µF

6.3V

×2

VOUT

5V

26A

4620A TA01a

For more information www.linear.com/LTM4620A

5V Efficiency vs IOUT

100

95

90

85

8V TO 5V EFF (650kHz)

12V TO 5V EFF (750kHz)

80

1 3 5 8 10 12 14 16 19 21 23

TOTAL OUTPUT CURRENT (A)

4620A TA01b

4620afc

1

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