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Linear Technology Electronic Components Datasheet

LTM4609 Datasheet

High Efficiency Buck-Boost DC/DC uModule Regulator

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LTM4609
36VIN, 34VOUT High Efficiency
Buck-Boost DC/DC
µModule Regulator
Features
Description
n Single Inductor Architecture Allows VIN Above,
Below or Equal to VOUT
n Wide VIN Range: 4.5V to 36V
n Wide VOUT Range: 0.8V to 34V
n IOUT: 4A DC (10A DC in Buck Mode)
n Up to 98% Efficiency
n Current Mode Control
n Power Good Output Signal
n Phase-Lockable Fixed Frequency: 200kHz to 400kHz
n Ultrafast Transient Response
n Current Foldback Protection
n Output Overvoltage Protection
n Small Surface Mount Footprint, Low Profile
(15mm × 15mm × 2.82mm) LGA and
(15mm × 15mm × 3.42mm) BGA Packages
n SnPb (BGA) or RoHS Compliant (LGA and BGA)
Finish
Applications
n Telecom, Servers and Networking Equipment
n Industrial and Automotive Equipment
n High Power Battery-Operated Devices
The LTM®4609 is a high efficiency switching mode buck-
boost power supply. Included in the package are the
switching controller, power FETs and support components.
Operating over an input voltage range of 4.5V to 36V, the
LTM4609 supports an output voltage range of 0.8V to
34V, set by a resistor. This high efficiency design delivers
up to 4A continuous current in boost mode (10A in buck
mode). Only the inductor, sense resistor, bulk input and
output capacitors are needed to finish the design.
The low profile package enables utilization of unused space
on the bottom of PC boards for high density point of load
regulation. The high switching frequency and current
mode architecture enable a very fast transient response
to line and load changes without sacrificing stability. The
LTM4609 can be frequency synchronized with an external
clock to reduce undesirable frequency harmonics.
Fault protection features include overvoltage and foldback
current protection. The DC/DC µModule® regulator is of-
fered in small 15mm × 15mm × 2.82mm LGA and 15mm
× 15mm × 3.42mm BGA packages. The LTM4609 is avail-
able with SnPb (BGA) or RoHS compliant terminal finish.
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule, Burst Mode and PolyPhase are
registered trademarks and No RSENSE is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Typical Application
30V/2A Buck-Boost DC/DC µModule Regulator with 6.5V to 36V Input
VIN
6.5V TO 36V
10µF
50V
ON/OFF
0.1µF
CLOCK SYNC
VIN PLLIN VOUT
FCB
RUN LTM4609
SW1
SW2
RSENSE
SENSE+
SS
SGND
SENSE
PGND
VFB
5.6µH
R2
15mΩ
×2
2.74k
10µF +
50V
330µF
50V
VOUT
30V
2A
4609 TA01a
For more information www.linear.com/LTM4609
Efficiency and Power Loss
vs Input Voltage
99
6
98 5
97
96 4
95 3
94 2
93
92
1
EFFICIENCY
91
8
12
16
20
24
POWER LOSS
28 32 36
0
VIN (V)
4609 TA01b
4609ff
1


Linear Technology Electronic Components Datasheet

LTM4609 Datasheet

High Efficiency Buck-Boost DC/DC uModule Regulator

No Preview Available !

LTM4609
Absolute Maximum Ratings
(Note 1)
VIN.............................................................. –0.3V to 36V
VOUT.............................................................. 0.8V to 36V
INTVCC, EXTVCC, RUN, SS, PGOOD............... –0.3V to 7V
SW1, SW2 (Note 7)....................................... –5V to 36V
VFB............................................................. –0.3V to 2.4V
COMP........................................................... –0.3V to 2V
FCB, STBYMD........................................ –0.3V to INTVCC
PLLIN......................................................... –0.3V to 5.5V
PLLFLTR..................................................... –0.3V to 2.7V
INTVCC................................................................. –40mA
Operating Temperature Range (Note 2)
E- and I-grades.....................................–40°C to 85°C
MP-grade............................................ –55°C to 125°C
Junction Temperature............................................ 125°C
Storage Temperature Range....................–55°C to 125°C
Solder Temperature (Note 3).................................. 245°C
Pin Configuration (See Table 6 Pin Assignment)
TOP VIEW SW2
(BANK 2)
M
L
SW1
(BANK 4) K
VIN
(BANK 1)
J
VOUT H
(BANK 5)
G
INTVCC
EXTVCC
F
E
RSENSE
(BANK 3)
PGND D
(BANK 6) C
PGOOD
VFB B
A
SENSESS SGND RUN FCB
COMP
PLLFLTR
PLLIN
1 2 3 4 5 6 7 8 9 10 11 12
SENSE+
STBYMD
LGA PACKAGE
141-LEAD (15mm × 15mm × 2.82mm)
TJMAX = 125°C, θJA = 11.4°C/W, θJCtop = 15°C/W, θJCbottom = 4°C/W, WEIGHT = 1.5g
TOP VIEW SW2
(BANK 2)
M
L
SW1
(BANK 4) K
VIN
(BANK 1)
J
VOUT H
(BANK 5)
G
INTVCC
EXTVCC
F
E
RSENSE
(BANK 3)
PGND D
(BANK 6) C
PGOOD
VFB B
A
SENSESS SGND RUN FCB
COMP
PLLFLTR
PLLIN
1 2 3 4 5 6 7 8 9 10 11 12
SENSE+
STBYMD
BGA PACKAGE
141-LEAD (15mm × 15mm × 3.42mm)
TJMAX = 125°C, θJA = 11.4°C/W, θJCtop = 15°C/W, θJCbottom = 4°C/W, WEIGHT = 1.7g
Order Information
PART NUMBER
PAD OR BALL FINISH
PART MARKING*
DEVICE
FINISH CODE
PACKAGE
TYPE
MSL
RATING
TEMPERATURE RANGE
(Note 2)
LTM4609EV#PBF
Au (RoHS)
LTM4609V
e4
LGA 3 –40°C to 85°C
LTM4609IV#PBF
Au (RoHS)
LTM4609V
e4
LGA 3 –40°C to 85°C
LTM4609MPV#PBF
Au (RoHS)
LTM4609V
e4
LGA 3 –55°C to 125°C
LTM4609EY#PBF
SAC305 (RoHS)
LTM4609Y
e1
BGA 3 –40°C to 85°C
LTM4609IY#PBF
SAC305 (RoHS)
LTM4609Y
e1
BGA 3 –40°C to 85°C
LTM4609IY
SnPb (63/37)
LTM4609Y
e0
BGA 3 –40°C to 85°C
LTM4609MPY #PBF
SAC305 (RoHS)
LTM4609Y
e1
BGA 3 –55°C to 125°C
LTM4609MPY
SnPb (63/37)
LTM4609Y
e0
BGA 3 –55°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.
• Recommended LGA and BGA PCB Assembly and Manufacturing
Procedures:
www.linear.com/umodule/pcbassembly
• Pb-free and Non-Pb-free Part Markings:
www.linear.com/leadfree
2
• LGA and BGA Package and Tray Drawings:
www.linear.com/packaging
For more information www.linear.com/LTM4609
4609ff


Part Number LTM4609
Description High Efficiency Buck-Boost DC/DC uModule Regulator
Maker Linear Technology
Total Page 28 Pages
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