LTM8052A_15 Datasheet, PDF (1/32 Pages) Linear Technology – 36VIN, 5A, 2-Quadrant CVCC Step-Down Module Regulator

Features
n _{Complete Step-Down Switch Mode Power Supply}
n _{CVCC: Constant-Voltage Constant-Current}
n _{2-Quadrant: Sources and Sinks Output Current}
n _{Adjustable Output Current}
n _{Wide Input Voltage Range: 6V to 36V}
n _{1.2V to 24V Output Voltage}
n _{Forced Continuous Operation}
n _{Selectable Switching Frequency: 100kHz to 1MHz}
n _{(e4) RoHS Compliant Package with Gold Pad Finish}
n _{Programmable Soft-Start}
n _{Compact (11.25mm × 15mm × 2.82mm) Surface}
Mount LGA and (11.25mm × 15mm × 3.42mm)
BGA Packages
Applications
n _{Constant-Frequency Voltage Regulation Even at}
No Load
n _{Peltier Driver}
n _{Battery Tester}
n _{Battery/Supercap Charging and Cell Balancing}
n _{Motor Drive Power Regulator}
n _{High Power LED Drive}
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.
LTM8052/LTM8052A
36V_IN, 5A, 2-Quadrant
CVCC Step-Down
µModule Regulator
Description
The LTM^®8052/LTM8052A is a 36V_IN, 5A, 2-quadrant
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 LTM8052/LTM8052A supports an output voltage
range of 1.2V to 24V. The LTM8052/LTM8052A is able to
sink or source current to maintain voltage regulation up to
the positive and negative current limits. This output current
limit can be set by a control voltage, a single resistor or a
thermistor. LTM8052 features a 125% output overvoltage
protection, while LTM8052A does not, allowing operation
when the output is above the target regulation point.
The LTM8052/LTM8052A is packaged in a compact
(11.25mm × 15mm × 2.82mm) overmolded land grid ar-
ray (LGA) and ball grid array (BGA) package suitable for
automated assembly by standard surface mount equip-
ment. The LTM8052/LTM8052A are available with SnPb
(BGA) or RoHS compliant terminal finish.
PART NUMBER
LTM8052
LTM8052A
LTM8026
BEST FOR
Sinking and sourcing output current for voltage
regulation primarily.
Sinking and sourcing output current for current
regulation primarily.
Sourcing more than 3A of output current.
(Less than 3A maximum consider LTM8025.)
Click to view associated TechClip Videos.
Typical Application
±5A, 2.5V (2-Quadrant) µModule Voltage Regulator
V_IN*
6V TO 36V
10µF
OPTIONAL
INPUT
PROTECTION
510k
LTM8052
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
*INPUT VOLTAGE PROTECTION MAY BE NECESSARY WHEN THE
8052 TA01a
LTM8052 IS SINKING CURRENT (SEE APPLICATIONS INFORMATION)
Output Voltage vs Output Current
3.5
LTM8052A MAINTAINS CURRENT
3.0
REGULATION
LTM8052 TURNS OFF AT
OUTPUT OVERVOLTAGE
2.5
2.0
1.5
1.0
0.5
0
–10
–5
0
5
LOAD CURRENT (A)
10
8052 TA01b
For more information www.linear.com/LTM8052
8052ff
1