Datasheet LTM8078 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Dual 1.4A, Single 2.8A Step-Down Silent Switcher μModule Regulator |
| Pages / Page | 26 / 1 — FEATURES. DESCRIPTION. Two Complete Step-Down Switching Power Supplies. … |
| Revision | A |
| File Format / Size | PDF / 3.5 Mb |
| Document Language | English |
FEATURES. DESCRIPTION. Two Complete Step-Down Switching Power Supplies. Low Noise Silent Switcher® Architecture
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Text Version of Document
LTM8078 Dual 1.4A, Single 2.8A Step-Down Silent Switcher μModule Regulator
FEATURES DESCRIPTION
n
Two Complete Step-Down Switching Power Supplies
The LTM®8078 is 40VIN, dual 1.4A/single 2.8A step-down n
Low Noise Silent Switcher® Architecture
Silent Switcher μModule® regulator. The Silent Switcher n
CISPR22 Class B Compliant
architecture minimizes EMI while delivering high efficiency n
CISPR25 Class 5 Compliant
at frequencies up to 3MHz. Included in the package are the n
Wide Input Voltage Range: 3V to 40V
controllers, power switches, inductors, and support com- n
Wide Output Voltage Range: 0.8V to 10V
ponents. Operating over a wide input voltage range, the n
1.4A Continuous Output Current per Channel at
LTM8078 supports output voltages from 0.8V to 10V, and
24VIN, 3.3VOUT, TA = 85°C
a switching frequency range of 300kHz to 3MHz, each set n
Multiphase Parallel Operation to Increase Current
by a single resistor. Only the bulk input and output filter n Selectable Switching Frequency: 300kHz to 3MHz capacitors are needed to finish the design. The LTM8078 n Compact Package (6.25mm × 6.25mm × 2.22mm) product video is available on website. Surface Mount BGA The LTM8078 is packaged in a compact (6.25mm × 6.25mm × 2.22mm) over-molded Ball Grid Array (BGA)
APPLICATIONS
package suitable for automated assembly by standard n Automated Test Equipment surface mount equipment. The LTM8078 is available with n Distributed Supply Regulation SnPb (BGA) or RoHS compliant. n Industrial Supplies All registered trademarks and trademarks are the property of their respective owners. n Medical Equipment
Click to view associated Video Design Idea. TYPICAL APPLICATION 3.3VOUT and 5VOUT from 7V to 40V Dual Step-Down Converter Efficiency Efficiency , V , V IN = 24V, BIAS = 5V IN = 24V, BIAS = 5V
95 VOUT1 VIN VIN1 VOUT1 3.3V 7V TO 40V 1.4A RUN LTM8078 100µF 90 78.7k 1µF FB1 85 17.8k RT GND EFFICIENCY (%) (1.6MHz) 80 VOUT2 TA = 25°C OM V 3.3V OUT2 5V OUT 5.0VOUT OMC BIAS 1.4A 75 0 0.5 1 1.5 2 2.5 47 µF LOAD CURRENT (A) 47.5k V 8078 TA01b IN2 FB2 1µF 8078 TA01a PINS NOT USED: TRSS1, TRSS2, PG1, PG2, CLKOUT, SYNC Rev. A Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Revision History Package Photograph Related Parts
FEATURES DESCRIPTION
n
Two Complete Step-Down Switching Power Supplies
The LTM®8078 is 40VIN, dual 1.4A/single 2.8A step-down n
Low Noise Silent Switcher® Architecture
Silent Switcher μModule® regulator. The Silent Switcher n
CISPR22 Class B Compliant
architecture minimizes EMI while delivering high efficiency n
CISPR25 Class 5 Compliant
at frequencies up to 3MHz. Included in the package are the n
Wide Input Voltage Range: 3V to 40V
controllers, power switches, inductors, and support com- n
Wide Output Voltage Range: 0.8V to 10V
ponents. Operating over a wide input voltage range, the n
1.4A Continuous Output Current per Channel at
LTM8078 supports output voltages from 0.8V to 10V, and
24VIN, 3.3VOUT, TA = 85°C
a switching frequency range of 300kHz to 3MHz, each set n
Multiphase Parallel Operation to Increase Current
by a single resistor. Only the bulk input and output filter n Selectable Switching Frequency: 300kHz to 3MHz capacitors are needed to finish the design. The LTM8078 n Compact Package (6.25mm × 6.25mm × 2.22mm) product video is available on website. Surface Mount BGA The LTM8078 is packaged in a compact (6.25mm × 6.25mm × 2.22mm) over-molded Ball Grid Array (BGA)
APPLICATIONS
package suitable for automated assembly by standard n Automated Test Equipment surface mount equipment. The LTM8078 is available with n Distributed Supply Regulation SnPb (BGA) or RoHS compliant. n Industrial Supplies All registered trademarks and trademarks are the property of their respective owners. n Medical Equipment
Click to view associated Video Design Idea. TYPICAL APPLICATION 3.3VOUT and 5VOUT from 7V to 40V Dual Step-Down Converter Efficiency Efficiency , V , V IN = 24V, BIAS = 5V IN = 24V, BIAS = 5V
95 VOUT1 VIN VIN1 VOUT1 3.3V 7V TO 40V 1.4A RUN LTM8078 100µF 90 78.7k 1µF FB1 85 17.8k RT GND EFFICIENCY (%) (1.6MHz) 80 VOUT2 TA = 25°C OM V 3.3V OUT2 5V OUT 5.0VOUT OMC BIAS 1.4A 75 0 0.5 1 1.5 2 2.5 47 µF LOAD CURRENT (A) 47.5k V 8078 TA01b IN2 FB2 1µF 8078 TA01a PINS NOT USED: TRSS1, TRSS2, PG1, PG2, CLKOUT, SYNC Rev. A Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Revision History Package Photograph Related Parts
