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Linear Dimensions Semiconductor
Linear Dimensions Semiconductor

LTM4609 Datasheet Preview

LTM4609 Datasheet

34VOUT High Efficiency Buck-Boost DC/DC uModule

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LTM4609 pdf
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LTM4609
36VIN, 34VOUT High Efficiency
Buck-Boost DC/DC µModule
FEATURES
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 Ultra-Fast Transient Response
n Current Foldback Protection
n Output Overvoltage Protection
n Small, Low Profile Surface Mount LGA Package
(15mm × 15mm × 2.8mm)
APPLICATIONS
n Telecom, Servers and Networking Equipment
n Industrial and Automotive Equipment
n High Power Battery-Operated Devices
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
μModule is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
DESCRIPTION
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™ is offered in a
small thermally enhanced 15mm × 15mm × 2.8mm LGA
package. The LTM4609 is Pb-free and RoHS compliant.
TYPICAL APPLICATION
30V/2A Buck-Boost DC/DC μModule with 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
s2
2.74k
10μF +
50V
330μF
50V
VOUT
30V
2A
4609 TA01a
Efficiency and Power Loss
vs Input Voltage
99
6
98
5
97
4
96
95 3
94
2
93
1
92 EFFICIENCY
POWER LOSS
91 0
8 12 16 20 24 28 32 36
VIN (V)
4609 TA01b
4609f
1



Linear Dimensions Semiconductor
Linear Dimensions Semiconductor

LTM4609 Datasheet Preview

LTM4609 Datasheet

34VOUT High Efficiency Buck-Boost DC/DC uModule

No Preview Available !

LTM4609 pdf
LTM4609www.DataSheet4U.com
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 .................................................... –5V to 36V
VFB, COMP ................................................ –0.3V to 2.4V
FCB, STBYMD ....................................... –0.3V to INTVCC
PLLIN........................................................ –0.3V to 5.5V
PLLFLTR.................................................... –0.3V to 2.7V
Operating Temperature Range
(Note 2) ...............................................–40°C to 85°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)
M
L
BANK 4
K
J
H
G
BANK 5
F
E
D
C
BANK 6
B
A
1
TOP VIEW
BANK 2
BANK 1
BANK 3
2 3 4 5 6 7 8 9 10 11
LGA PACKAGE
141-LEAD (15mm s 15mm s 2.8mm)
TJMAX = 125°C, θJP = 4°C/W, WEIGHT = 1.5g
12
ORDER INFORMATION
LEAD FREE FINISH
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTM4609EV#PBF
LTM4609V
141-Lead (15mm × 15mm × 2.8mm) LGA –40°C to 85°C
LTM4609IV#PBF
LTM4609V
141-Lead (15mm × 15mm × 2.8mm) LGA –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
This product is only offered in trays. For more information go to: http://www.linear.com/packaging/
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the –40°C to 85°C
temperature range, otherwise specifications are at TA = 25°C, VIN = 12V. Per typical application (front page) configuration.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP
MAX UNITS
Input Specifications
VIN(DC)
Input DC Voltage
l 4.5
36 V
VIN(UVLO)
Undervoltage Lockout Threshold VIN Falling
l
3.4 4
V
IQ(VIN)
Input Supply Bias Current
Normal
Standby
Shutdown Supply Current
VRUN = 0V, VSTBYMD > 2V
VRUN = 0V, VSTBYMD = Open
2.8
1.6
35 60
mA
mA
μA
4609f
2


Part Number LTM4609
Description 34VOUT High Efficiency Buck-Boost DC/DC uModule
Maker Linear Dimensions Semiconductor
Total Page 24 Pages
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