LTM4657 datasheet(2/28 Pages) AD

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LTM4657

Rev. A

For more information www.analog.com

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

VIN ............................................................. –0.3V to 22V

VOUT............................................................. –0.3V to 6V

INTVCC...................................................... –0.3V to 3.6V

RUN ........................................................... –0.3V to 22V

PGOOD, FREQ, COMPa, COMPb,

PHMODE, CLKOUT, FB.............................. –0.3V to 3.6V

MODE/CLKIN, TRACK/SS .....................–0.3V to INTVCC

VOSNS+......................................................... –0.3V to 6V

VOSNS–...................................................... –0.3V to 0.3V

Internal Operating Temperature Range

(Notes 2, 3)............................................ –40°C to 125°C

Storage Temperature Range .................. –55°C to 125°C

Peak Solder Reflow Body Temperature ................. 250°C

(Note 1)

(See Pin Functions, Pin Configuration Table)

BGA PACKAGE

49-LEAD (6.25mm × 6.25mm × 3.87mm)

TJMAX = 125°C, θJA = 17°C/W,

θJCTOP = 9.4°C/W, θJCBOTTOM = 4.0°C/W

TOP VIEW

NOTE:

1) θ VALUES ARE DETERMINED BY SIMULATION PER JESD51 CONDITIONS.

2) θJA VALUE IS OBTAINED WITH DEMO BOARD.

3) REFER TO PAGE 19 FOR LAB MEASUREMENT AND DE-RATING INFORMATION.

4) WEIGHT = 497mg

VOUT

VIN

PHMODE

GND

TSENSE–

TSENSE+

CLKOUT

COMPb

FREQ

VOSNS–

MODE/CLKIN

TRACK/SS

VOSNS+

INTVCC

RUN

PGOOD

COMPa

VOUT

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the specified internal

operating temperature range (Note 2), otherwise specifications are at TA = 25°C. VIN = 12V per the typical application shown on the

front page.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Switching Regulator Section: per Channel

VIN

Input DC Voltage

VIN

3.1

VOUT

Output Voltage Range

0.5

5.5

VOUT(DC)

Output Voltage, Total

Variation with Line and Load

CIN = 22µF, COUT = 100µF Ceramic, RFB = 30.2k,

MODE = INTVCC, IOUT = 0A to 8A (Note 3)

–40°C to 125°C

1.477

1.50

1.523

VRUN

RUN Pin On Threshold

VRUN Rising

1.05

1.20

1.35

ORDER INFORMATION

PART NUMBER

PAD OR BALL FINISH

PART MARKING*

PACKAGE

TYPE

MSL

RATING

TEMPERATURE RANGE

(Note 2)

DEVICE

FINISH CODE

LTM4657EY#PBF

SAC305 (RoHS)

4657

BGA

–40°C to 125°C

LTM4657IY#PBF

SAC305 (RoHS)

4657

BGA

–40°C to 125°C

LTM4657IY

SnPb

4657

BGA

–40°C to 125°C

• Contact the factory for parts specified with wider operating temperature

ranges. *Pad or ball finish code is per IPC/JEDEC J-STD-609.

• Recommended LGA and BGA PCB Assembly and Manufacturing

Procedures

• LGA and BGA Package and Tray Drawings

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