LTM8064 Datasheet, PDF (1/36 Pages) –

Features
n _{Complete Step-Down Switch Mode Power Supply}
n _{CVCC: Constant-Voltage, Constant-Current}
n _{2-Quadrant: Sources and Sinks Output Current}
n _{Parallelable for Increased Output Current,}
Even from Different Voltage Sources
n _{Adjustable Output Current Up to 7A When}
Sourcing or 9.1A When Sinking
n _{Wide Input Voltage Range: 6V to 58V}
n _{1.2V to 36V Output Voltage}
n _{Selectable Switching Frequency: 100kHz to 1MHz}
n _{(e1) RoHS Compliant Package}
n _{Programmable Soft-Start}
n _{Tiny (16mm × 11.9mm × 4.92mm) Surface Mount}
BGA Package
Applications
n _{Short-Circuit Protection or Accurate Output Current}
Limit
n _{High Power LED Drive}
n _{Peltier Driver}
n _{Motor Drive}
n _{Battery/Supercap Charging and Cell Balancing}
LTM8064
58V_IN, 6A CVCC Step-Down
µModule Regulator
Description
The LTM^®8064 is a 58V_IN, 6A, constant-voltage, constant-
current (CVCC), step-down µModule^® (power module)
regulator. Included in the package are the switching con-
troller, power switches, inductor and support components.
Operating over an input voltage range of 6V to 58V, the
LTM8064 supports an output voltage range of 1.2V to
36V. CVCC operation allows the LTM8064 to accurately
regulate its output current up to 7A when sourcing and
9.1A when sinking over the entire output range. The output
current can be set by a control voltage, a single resistor or
a thermistor. To set the switching frequency, simply place
a resistor from the RT pin to ground. A resistor from FB
to ground will set the output voltage. Only the bulk input
and output filter capacitors are needed to finish the design.
The LTM8064 is packaged in a thermally enhanced, com-
pact (16mm × 11.9mm × 4.92mm) over-molded ball grid
array (BGA) package suitable for automated assembly
by standard surface mount equipment. The LTM8064 is
RoHS compliant.
L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 7199560, 7321203 and others pending.
Typical Application
58V_IN, 5V_OUT Step-Down CVCC Converter
V_IN
7.5V TO 58V
+
15µF
100V
2×4.7µF
V_IN
LTM8064
RUN
MODE
SYNC
RT
GND
130k
325kHz
V_OUT
CTRL1
CTRL2
V_REF
FB
5.11k
+
100µF
V_OUT
5V
330µF ^6A
10V
PINS NOT USED IN THIS CIRCUIT:
SS
I_OUTMON
PGOOD
8064 TA01a
For more information www.linear.com/LTM8064
Output Voltage vs Output Current
V_IN = 12V
7
6
5
4
3
2
1
0
–10 –8 –6 –4 –2 0 2 4
OUTPUT CURRENT (A)
68
8064 TA01b
8064fa
1