LTM8026_1208 Datasheet, PDF (1/26 Pages) Linear Technology – 36VIN, 5A CVCC Step-Down Module Regulator

LTM8026
36V_IN, 5A CVCC Step-Down
µModule Regulator
Features
n _{Complete Step-Down Switch Mode Power Supply}
n _{Constant-Voltage Constant-Current Operation}
n _{Selectable Output Current Up to 5A}
n _{Parallelable for Increased Output Current, Even}
from Different Voltage Sources
n _{Wide Input Voltage Range: 6V to 36V}
n _{1.2V to 24V Output Voltage}
n _{Selectable Switching Frequency: 100kHz to 1MHz}
n _{(e4) RoHS Compliant Package with Gold Pad Finish}
n _{Programmable Soft-Start}
n _{Tiny, Low Profile (11.25mm × 15mm × 2.82mm)}
Surface Mount LGA Package
Applications
n _{SuperCap Charging}
n _{General Purpose Industrial}
n _{Extreme Short-Circuit Protection or Accurate Output}
Current Limit
n _{µController-Based Battery Charging}
n _{High Power LED Drive}
n _{Multiple Input, Single Output Voltage Conversion}
Description
The LTM^®8026 is a 36V_IN, 5A constant-voltage, constant-
current (CVCC) step-down µModule^® regulator. Included in
the package are the switching controller, power switches,
inductor and support components. Operating over an
input voltage range of 6V to 36V, the LTM8026 supports
an output voltage range of 1.2V to 24V. CVCC operation
allows the LTM8026 to accurately regulate its output
current up to 5A over the entire output range. The output
current can be set by a control voltage, a single resistor or
a thermistor. Only resistors to set the output voltage and
frequency and the bulk input and output filter capacitors
are needed to finish the design.
The low profile package (2.82mm) enables utilization of
unused space on the bottom of PC boards for high density
point-of-load regulation. The LTM8026 is packaged in a
thermally-enhanced, compact (11.25mm × 15mm) and
low profile (2.82mm) overmolded land grid array (LGA)
package suitable for automated assembly by standard sur-
face mount equipment. The LTM8026 is RoHS compliant.
L, LT, LTC, LTM, µModule, Linear Technology and the Linear logo 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
Typical Application
V_IN
6V TO 36V
10µF
100k
LTM8026
V_IN
V_OUT
RUN
SS
SYNC
V_REF
CTL_I
COMP CTL_T
RT GND ADJ
90.9k
9.09k
V_OUT
2.5V
5A
+
100µF
330µF
8026 TA01a
V_OUT vs I_OUT, 12V_IN
3.0
2.5
2.0
1.5
1.0
0.5
0
0123456
OUTPUT CURRENT (A)
8026 TA01b
8026fa
1