DC/DC Converter. LTM8045 Datasheet

LTM8045 Converter. Datasheet pdf. Equivalent


Part LTM8045
Description Inverting or SEPIC uModule DC/DC Converter
Feature Features n SEPIC or Inverting Topology n Wide Input Voltage Range: 2.8V to 18V n Up to 700mA Outp.
Manufacture Linear Technology
Datasheet
Download LTM8045 Datasheet


Features n SEPIC or Inverting Topology n Wide Input Voltag LTM8045 Datasheet
Recommendation Recommendation Datasheet LTM8045 Datasheet




LTM8045
Features
n SEPIC or Inverting Topology
n Wide Input Voltage Range: 2.8V to 18V
n Up to 700mA Output Current at VIN = 12V,
VOUT = 2.5V or –2.5V
n Up to 375mA Output Current at VIN = 12V,
VOUT =15V or –15V
n 2.5V to 15V or –2.5V to –15V Output Voltage
n Selectable Switching Frequency: 200kHz to 2MHz
n Programmable Soft-Start
n User Configurable Undervoltage Lockout
n 6.25mm × 11.25mm × 4.92mm BGA Package
Applications
n Battery Powered Regulator
n Local Negative Voltage Regulator
n Low Noise Amplifier Power
LTM8045
Inverting or SEPIC µModule
DC/DC Converter with Up
to 700mA Output Current
Description
The LTM®8045 is a µModule® (micromodule) DC/DC
converter that can be configured as a SEPIC or inverting
converter by simply grounding the appropriate output rail.
In a SEPIC configuration the regulated output voltage can
be above, below or equal to the input voltage. The LTM8045
includes power devices, inductors, control circuitry and
passive components. All that is needed to complete the
design are input and output capacitors, and small resis-
tors to set the output voltage and switching frequency.
Other components may be used to control the soft-start
and undervoltage lockout.
The LTM8045 is packaged in a compact (6.25mm ×
11.25mm) overmolded ball grid array (BGA) package suit-
able for automated assembly by standard surface mount
equipment. The LTM8045 is available with SnPb (BGA)
or RoHS compliant terminal finish.
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Typical Application
Use Two LTM8045s to Generate ±5V
VIN
2.8VDC TO 18VDC
4.7µF
130k
VIN
RUN
SS
RT
SYNC
LTM8045
GND
VOUT
FB
VOUT+
60.4k
VOUT
–5V
22µF
115k
VIN
RUN
SS
RT
SYNC
LTM8045
GND
VOUT
FB
VOUT+
8045 TA01b
45.3k
100µF
VOUT
5V
Maximum Output Current
vs Input Voltage
800
700
600
500
400
±2.5VOUT
300 ±3.3VOUT
±5VOUT
200
±8VOUT
±12VOUT
100 ±15VOUT
2 4 6 8 10 12 14 16 18
INPUT VOLTAGE (V)
8045 TA01b
For more information www.linear.com/LTM8045
8045fc
1



LTM8045
LTM8045
Absolute Maximum Ratings
(Note 1)
VIN, RUN....................................................................20V
RT, SYNC.....................................................................5V
SS, FB.......................................................................2.5V
VVOOUUTT+–
((VVOOUUTT–+
=
=
0V).................................................... 16V
0V).................................................. –16V
Maximum Internal Temperature............................. 125°C
Maximum Solder Temperature............................... 250°C
Storage Temperature.............................. –55°C to 125°C
Pin Configuration
TOP VIEW
VOUT– 5
BANK 1 4
3 FB
VOUT+ 2
BANK 2 1
GND
BANK 3
ABCDE FGH
SS RT
BGA PACKAGE
40-LEAD (11.25mm × 6.25mm × 4.92mm)
TJMAX = 125°C, θJA = 28.7°C/W, θJB = 7.6°C/W,
θJCtop = 40.3°C/W, θJCbottom = 10.5°C/W
θ VALUES DETERMINED PER JEDEC 51-9, 51-12
WEIGHT = 0.9g
VIN
BANK 4
RUN
SYNC
Order Information http://www.linear.com/product/LTM8045#orderinfo
PART NUMBER
LTM8045EY#PBF
LTM8045IY#PBF
LTM8045IY
LTM8045MPY#PBF
LTM8045MPY
PAD OR BALL FINISH
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
SAC305 (RoHS)
SnPb (63/37)
PART MARKING*
DEVICE
FINISH CODE
LTM8045Y
e1
LTM8045Y
e1
LTM8045Y
e0
LTM8045Y
e1
LTM8045Y
e0
PACKAGE
TYPE
BGA
BGA
BGA
BGA
BGA
MSL
RATING
3
3
3
3
3
TEMPERATURE RANGE
(Note 2)
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–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.
Terminal Finish Part Marking:
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
8045fc
2 For more information www.linear.com/LTM8045







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