LTM8045_15 Datasheet, PDF (1/22 Pages) Linear Technology – Inverting or SEPIC Module DC/DC Converter with Up to 700mA Output Current

FEATURES
n _{SEPIC or Inverting Topology}
n _{Wide Input Voltage Range: 2.8V to 18V}
n _{Up to 700mA Output Current at VIN = 12V,}
V_OUT = 2.5V or –2.5V
n _{Up to 375mA Output Current at VIN = 12V,}
V_OUT =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
V_IN
2.8VDC TO 18VDC
4.7µF
130k
V_IN
RUN
SS
RT
SYNC
LTM8045
GND
V_OUT^–
FB
V_OUT⁺
60.4k
V_OUT
–5V
22µF
115k
V_IN
RUN
SS
RT
SYNC
LTM8045
GND
V_OUT^–
FB
V_OUT⁺
8045 TA01b
45.3k
100µF
V_OUT
5V
Maximum Output Current
vs Input Voltage
800
700
600
500
400
±2.5V_OUT
300
±3.3V_OUT
±5V_OUT
200
±8V_OUT
±12V_OUT
±15V_OUT
100
2 4 6 8 10 12 14 16 18
INPUT VOLTAGE (V)
8045 TA01b
For more information www.linear.com/LTM8045
8045fb
1