Datasheet LTM8031 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Ultralow Noise EMC 36V, 1A DC/DC µModule Regulator |
| Pages / Page | 22 / 1 — FeaTures. DescripTion. Complete Step-Down Switch Mode Power Supply. Wide … |
| File Format / Size | PDF / 304 Kb |
| Document Language | English |
FeaTures. DescripTion. Complete Step-Down Switch Mode Power Supply. Wide Input Voltage Range: 3.6V to 36V. 1A Output Current
Model Line for this Datasheet
Text Version of Document
LTM8031 Ultralow Noise EMC 36V, 1A DC/DC µModule Regulator
FeaTures DescripTion
n
Complete Step-Down Switch Mode Power Supply
The LTM®8031 is an electromagnetic compatible (EMC) n
Wide Input Voltage Range: 3.6V to 36V
36V, 1A DC/DC µModule® buck converter designed to n
1A Output Current
meet the radiated emissions requirements of EN55022. n
0.8V to 10V Output Voltage
Conducted emission requirements can be met by adding n
Switching Frequency from 200kHz to 2.4MHz
standard filter components. Included in the package are the n
EN55022 Class B Compliant with Margin
switching controller, power switches, inductor, filters and n Current Mode Control all support components. Operating over an input voltage n (e4) RoHS Compliant Package with Gold Pad Finish range of 3.6V to 36V, the LTM8031 supports an output n Programmable Soft-Start voltage range of 0.8V to 10V, and a switching frequency n Pin Compatible with the LTM8032 range of 200kHz to 2.4MHz, each set by a single resistor. n Low Profile (9mm × 15mm × 2.82mm) Only the bulk input and output filter capacitors are needed Surface Mount LGA Package 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.
applicaTions
The LTM8031 is packaged in a thermally enhanced, compact n Automotive Battery Regulation (9mm ×15mm) and low profile (2.82mm) overmolded land n Power for Portable Products grid array (LGA) package suitable for automated assembly n Distributed Supply Regulation by standard surface mount equipment. The LTM8031 is n Industrial Supplies RoHS compliant. n Wall Transformer Regulation L, LT, LTC, LTM, µModule, Burst Mode, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Typical applicaTion Ultralow Noise 5V/1A DC/DC µModule Regulator LTM8031 EMI Performance
VOUT VIN* V V IN OUT 5V 7VDC TO 36VDC IN = 36V 1A 80 FIN 10µF LTM8031 70 RUN/SS AUX 60 1µF BIAS 50 SHARE PGOOD EN55022 40 CLASS B RT SYNC GND ADJ 30 LIMIT 44.2k 47.5k 20 EMISSIONS LEVEL (dBµV/m) 8031 TA01a 10 0 *RUNNING VOLTAGE RANGE. –10 SEE APPLICATIONS FOR START-UP DETAILS 0 100 200 300 400 500 600 700 800 900 1000 FREQUENCY (MHz) 8031 TA01b 8031fb 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical application Related Parts
FeaTures DescripTion
n
Complete Step-Down Switch Mode Power Supply
The LTM®8031 is an electromagnetic compatible (EMC) n
Wide Input Voltage Range: 3.6V to 36V
36V, 1A DC/DC µModule® buck converter designed to n
1A Output Current
meet the radiated emissions requirements of EN55022. n
0.8V to 10V Output Voltage
Conducted emission requirements can be met by adding n
Switching Frequency from 200kHz to 2.4MHz
standard filter components. Included in the package are the n
EN55022 Class B Compliant with Margin
switching controller, power switches, inductor, filters and n Current Mode Control all support components. Operating over an input voltage n (e4) RoHS Compliant Package with Gold Pad Finish range of 3.6V to 36V, the LTM8031 supports an output n Programmable Soft-Start voltage range of 0.8V to 10V, and a switching frequency n Pin Compatible with the LTM8032 range of 200kHz to 2.4MHz, each set by a single resistor. n Low Profile (9mm × 15mm × 2.82mm) Only the bulk input and output filter capacitors are needed Surface Mount LGA Package 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.
applicaTions
The LTM8031 is packaged in a thermally enhanced, compact n Automotive Battery Regulation (9mm ×15mm) and low profile (2.82mm) overmolded land n Power for Portable Products grid array (LGA) package suitable for automated assembly n Distributed Supply Regulation by standard surface mount equipment. The LTM8031 is n Industrial Supplies RoHS compliant. n Wall Transformer Regulation L, LT, LTC, LTM, µModule, Burst Mode, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Typical applicaTion Ultralow Noise 5V/1A DC/DC µModule Regulator LTM8031 EMI Performance
VOUT VIN* V V IN OUT 5V 7VDC TO 36VDC IN = 36V 1A 80 FIN 10µF LTM8031 70 RUN/SS AUX 60 1µF BIAS 50 SHARE PGOOD EN55022 40 CLASS B RT SYNC GND ADJ 30 LIMIT 44.2k 47.5k 20 EMISSIONS LEVEL (dBµV/m) 8031 TA01a 10 0 *RUNNING VOLTAGE RANGE. –10 SEE APPLICATIONS FOR START-UP DETAILS 0 100 200 300 400 500 600 700 800 900 1000 FREQUENCY (MHz) 8031 TA01b 8031fb 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical application Related Parts
