Datasheet LTM8078 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | Dual 1.4A, Single 2.8A Step-Down Silent Switcher μModule Regulator |
| Seiten / Seite | 24 / 1 — FEATURES. DESCRIPTION. Two Complete Step-Down Switching Power Supplies. … |
| Dateiformat / Größe | PDF / 1.7 Mb |
| Dokumentensprache | Englisch |
FEATURES. DESCRIPTION. Two Complete Step-Down Switching Power Supplies. Low Noise Silent Switcher® Architecture
Textversion des Dokuments
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
Wide Input Voltage Range: 3V to 40V
at frequencies up to 3MHz. Included in the package are the n
Wide Output Voltage Range: 0.8V to 10V
controllers, power switches, inductors, and support com- n
1.4A Continuous Output Current per Channel at
ponents. Operating over a wide input voltage range, the
24VIN, 3.3VOUT, TA = 85°C
LTM8078 supports output voltages from 0.8V to 10V, and n
Multiphase Parallel Operation to Increase Current
a switching frequency range of 300kHz to 3MHz, each set n Selectable Switching Frequency: 300kHz to 3MHz by a single resistor. Only the bulk input and output filter n Compact Package (6.25mm × 6.25mm × 2.22mm) capacitors are needed to finish the design. The LTM8078 Surface Mount BGA product video is available on website. The LTM8078 is packaged in a compact (6.25mm ×
APPLICATIONS
6.25mm × 2.22mm) over-molded Ball Grid Array (BGA) n package suitable for automated assembly by standard Automated Test Equipment n surface mount equipment. The LTM8078 is available with Distributed Supply Regulation n SnPb (BGA) or RoHS compliant. Industrial Supplies n Medical Equipment All registered trademarks and trademarks are the property of their respective owners.
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. 0 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 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
Wide Input Voltage Range: 3V to 40V
at frequencies up to 3MHz. Included in the package are the n
Wide Output Voltage Range: 0.8V to 10V
controllers, power switches, inductors, and support com- n
1.4A Continuous Output Current per Channel at
ponents. Operating over a wide input voltage range, the
24VIN, 3.3VOUT, TA = 85°C
LTM8078 supports output voltages from 0.8V to 10V, and n
Multiphase Parallel Operation to Increase Current
a switching frequency range of 300kHz to 3MHz, each set n Selectable Switching Frequency: 300kHz to 3MHz by a single resistor. Only the bulk input and output filter n Compact Package (6.25mm × 6.25mm × 2.22mm) capacitors are needed to finish the design. The LTM8078 Surface Mount BGA product video is available on website. The LTM8078 is packaged in a compact (6.25mm ×
APPLICATIONS
6.25mm × 2.22mm) over-molded Ball Grid Array (BGA) n package suitable for automated assembly by standard Automated Test Equipment n surface mount equipment. The LTM8078 is available with Distributed Supply Regulation n SnPb (BGA) or RoHS compliant. Industrial Supplies n Medical Equipment All registered trademarks and trademarks are the property of their respective owners.
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. 0 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 Package Photograph Related Parts