uModule Regulator. LTM4634 Datasheet

LTM4634 Regulator. Datasheet pdf. Equivalent


Part LTM4634
Description Triple Output 5A/5A/4A Step-Down DC/DC uModule Regulator
Feature Features n Three Independent High Efficiency Regulator Channels n IOUT1,2 = 5A, IOUT3 = 4A n Input.
Manufacture Linear Technology
Datasheet
Download LTM4634 Datasheet


Features n Three Independent High Efficiency Regulator Chan LTM4634 Datasheet
Recommendation Recommendation Datasheet LTM4634 Datasheet




LTM4634
Features
n Three Independent High Efficiency Regulator
Channels
n IOUT1,2 = 5A, IOUT3 = 4A
n Input Voltage Range: 4.75V to 28V
n Independent VIN for Each Channel
n VOUT1,2 Voltage Range: 0.8V to 5.5V
n VOUT3 Voltage Range: 0.8V to 13.5V
n ±1.5% Maximum Total DC Output Error
n Current Mode Control/Fast Transient Response
n Frequency Synchronization
n Output Overvoltage and Overcurrent Protection
n PolyPhase® Operation with Current Sharing
n General Purpose Temperature Monitors
n Soft-Start/Voltage Tracking
n Power Good Monitors
n SnPb or RoHS Compliant Finish
n 15mm × 15mm × 5.01mm BGA Package
Applications
n Telecom, Networking and Industrial Equipment
n High Density Point of Load Voltage Regulation
LTM4634
Triple Output 5A/5A/4A
Step-Down DC/DC
µModule® Regulator
Description
The LTM®4634 integrates three complete 5A/5A/4A high
efficiency switching mode DC/DC converters into one small
package. Switching controllers, power FETs, inductors, and
most support components are included. Operating over an
input voltage range of 4.75V to 28V, the LTM4634 provides
three independent output voltages. VOUT1 and VOUT2 are
adjustable from 0.8V to 5.5V, while VOUT3 is adjustable
from 0.8V to 13.5V. Each output voltage is set by a single
external resistor.
High switching frequency and a current mode architecture
enable a very fast transient response to line and load
changes without sacrificing stability. The device supports
frequency synchronization, multiphase parallel opera-
tion, soft-start and output voltage tracking for supply rail
sequencing.
Fault protection features include overvoltage protection,
overcurrent protection and temperature monitoring. The
power module is offered in a space saving, thermally
enhanced 15mm × 15mm × 5.01mm BGA package. The
LTM4634 is available with SnPb (BGA) or RoHS compliant
terminal finish.
L, LT, LTC, LTM, µModule, PolyPhase, Burst Mode, Linear Technology and the Linear logo
are registered trademarks and PowerPath, LTpowerCAD and UltraFast are trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194,
6177787, 6304066, 6580258 and 8163643. Other patents pending.
Typical Application
24V Input to 3.3V, 5V and 12V Output Regulator
24VIN
40k
5V
2Ω VIN1 VIN2 VIN3 EXTVCC INTVCC FREQ/PLLLPF
CNTL_PWR
PGOOD12
10k 10k
4.7µF
6.3V
RUN1
1µF RUN2
RUN3
TK/SS1
TK/SS2
TK/SS3
LTM4634
PGOOD3
VOUT1
VFB1
19.1k
VOUT2
VFB2
11.5k
3.3V
5V
MODE/PLLIN GND SGND
VOUT3
VFB3
4.32k
12V
4634 TA01a
For more information www.linear.com/LTM4634
24V Input Efficiency
100
95
90
85
80
75
70 VEXTVCC = 5V
24V to 3.3V EFF (750kHz) CH1
65 24V to 5V EFF (750kHz) CH2
24V to 12V EFF (750kHz) CH3
60
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
LOAD CURRENT (A)
4634 TA01b
4634f
1



LTM4634
LTM4634
Absolute Maximum Ratings
(Note 1)
CNTL_PWR................................................ –0.3V to 30V
VIN1, VIN2, VIN3............................................ –0.3V to 30V
VOUT1, VOUT2............................................ –0.3V to 5.75V
VOUT3.......................................................... –0.3V to 14V
Switch Voltage (SW1, SW2 and SW3)............–1V to 30V
MODE/PLLIN, TK/SS1, TK/SS2, TK/SS3,
FREQ/PLLLPF........................................ –0.3V to INTVCC
COMP1, COMP2, COMP3, VFB1, VFB2, VFB3
(Note 3).................................................. –0.3V to INTVCC
RUN1, RUN2, RUN3, INTVCC, EXTVCC,
PGOOD12, PGOOD3...................................... –0.3V to 6V
TEMP1, TEMP2.......................................... –0.3V to 0.8V
INTVCC Peak Output Current.................................100mA
Operating Junction Temperature Range
(Note 2)................................................... –40°C to 125°C
Storage Temperature Range................... –55°C to 125°C
Peak Solder Reflow Body Temperature.................. 245°C
Pin Configuration
PGOOD12 M
PGOOD3
EXTVCC
L
K
J
COMP1
TOP VIEW
VFB1 GND
FREQ/PLLLPF
TKSS2
TK/SS1 TK/SS3
COMP2 VFB2
COMP3 VFB3 SGND
GND
GND
H
VIN3
G
VIN2
GND
VIN1
GND
MODE/PLLIN
RUN1
RUN2
RUN3
INTVCC
CNTL_PWR
F
SW3 E
D
GND
SW1
SW2
C
TEMP2 B
A
VOUT3
VOUT2
VOUT1
TEMP1
1 2 3 4 5 6 7 8 9 10 11 12
GND GND
BGA PACKAGE 144 LEAD (15mm × 15mm × 5.01mm)
TJMAX = 125°C, θJA = 7.5°C/W, θJCbottom = 4°C/W, θJCtop = 5°C/W
θJA DERIVED FROM 95mm × 76mm PCB WITH 4-LAYER, WEIGHT = 3.2g
θ VALUES DETERMINED PER JESD51-12
Order Information
PART NUMBER
LTM4634EY#PBF
LTM4634IY#PBF
LTM4634IY
PAD OR BALL FINISH
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
PART MARKING*
DEVICE
FINISH CODE
LTM4634Y
e1
LTM4634Y
e1
LTM4634Y
e0
PACKAGE
TYPE
BGA
BGA
BGA
MSL
RATING
4
4
4
TEMPERATURE RANGE
(See Note 2)
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
Consult Marketing for parts specified with wider operating temperature
ranges. *Device temperature grade is indicated by a label on the shipping
container. Pad or ball finish code is per IPC/JEDEC J-STD-609.
• Terminal Finish Part Markings:
www.linear.com/leadfree
• Recommended LGA and BGA PCB Assembly and Manufacturing
Procedures:
www.linear.com/umodule/pcbassembly
• LGA and BGA Package and Tray Drawings:
www.linear.com/packaging
4634f
2 For more information www.linear.com/LTM4634







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