Datasheet LTM8027 (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | 60V, 4A DC/DC µModule Regulator |
| 页数 / 页 | 22 / 1 — FEATURES. DESCRIPTION. Complete Switch Mode Power Supply. Wide Input … |
| 文件格式/大小 | PDF / 636 Kb |
| 文件语言 | 英语 |
FEATURES. DESCRIPTION. Complete Switch Mode Power Supply. Wide Input Voltage Range: 4.5V to 60V
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LTM8027 60V, 4A DC/DC µModule Regulator
FEATURES DESCRIPTION
n
Complete Switch Mode Power Supply
The LTM®8027 is a complete 4A, DC/DC step-down power n
Wide Input Voltage Range: 4.5V to 60V
supply. Included in the package are the switching control-
(7.5V Minimum Voltage to Start)
ler, power switches, inductor and all support components. n
Wide Output Voltage Range: 2.5V to 24V
Operating over an input voltage range of 4.5V to 60V (7.5V
(See Table 2)
minimum voltage to start), the LTM8027 supports output n
4A Output Current
voltages up to 24V, and a switching frequency range of n
Programmable Soft-Start
100kHz to 500kHz, each set by a single resistor. Only n 9µA Shutdown Supply Current the bulk input and output filter capacitors are needed to n Selectable Switching Frequency Current Mode finish the design. Control The low profile package (4.32mm) enables utilization of n Up to 95% Efficiency unused space on the bottom of PC boards for high den- n SnPb (BGA) or RoHS Compliant (LGA and BGA) sity point of load regulation. A built-in soft-start timer is Finish adjustable with a small capacitor. n Surface Mount LGA (15mm × 15mm × 4.32mm) and (15mm × 15mm × 4.92mm) BGA Packages The LTM8027 is packaged in a compact (15mm × 15mm × 4.32mm) over-molded land grid array (LGA) and (15mm
APPLICATIONS
× 15mm × 4.92mm) BGA package suitable for automated assembly by standard surface mount equipment. The n 12V and 42V Automotive and Heavy Equipment LTM8027 is available with SnPb (BGA) or RoHS compli- n 48V Telecom Power Supplies ant terminal finish. n L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of Avionics and Industrial Control Systems Linear Technology Corporation. All other trademarks are the property of their respective owners. n Distributed Power Converters
TYPICAL APPLICATION 48W, 16VIN to 60VIN DC/DC µModule
®
Regulator Efficiency vs Load
VOUT 100 VIN 24VIN VIN VOUT 16V TO 60V 12V 90 4.7µF 4A 1M LTM8027 ×2 80 RUN BIAS1 70 SS BIAS2 22µF 60 SYNC AUX ×4 50 RT ADJ GND 40 48.7k 56.2k EFFICIENCY (%) 30 20 3845 TA01a 10 0 0 1 2 3 4 LOAD (A) 8027 TA01b 8027fd For more information www.linear.com/LTM8027 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Photograph Package Description Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n
Complete Switch Mode Power Supply
The LTM®8027 is a complete 4A, DC/DC step-down power n
Wide Input Voltage Range: 4.5V to 60V
supply. Included in the package are the switching control-
(7.5V Minimum Voltage to Start)
ler, power switches, inductor and all support components. n
Wide Output Voltage Range: 2.5V to 24V
Operating over an input voltage range of 4.5V to 60V (7.5V
(See Table 2)
minimum voltage to start), the LTM8027 supports output n
4A Output Current
voltages up to 24V, and a switching frequency range of n
Programmable Soft-Start
100kHz to 500kHz, each set by a single resistor. Only n 9µA Shutdown Supply Current the bulk input and output filter capacitors are needed to n Selectable Switching Frequency Current Mode finish the design. Control The low profile package (4.32mm) enables utilization of n Up to 95% Efficiency unused space on the bottom of PC boards for high den- n SnPb (BGA) or RoHS Compliant (LGA and BGA) sity point of load regulation. A built-in soft-start timer is Finish adjustable with a small capacitor. n Surface Mount LGA (15mm × 15mm × 4.32mm) and (15mm × 15mm × 4.92mm) BGA Packages The LTM8027 is packaged in a compact (15mm × 15mm × 4.32mm) over-molded land grid array (LGA) and (15mm
APPLICATIONS
× 15mm × 4.92mm) BGA package suitable for automated assembly by standard surface mount equipment. The n 12V and 42V Automotive and Heavy Equipment LTM8027 is available with SnPb (BGA) or RoHS compli- n 48V Telecom Power Supplies ant terminal finish. n L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of Avionics and Industrial Control Systems Linear Technology Corporation. All other trademarks are the property of their respective owners. n Distributed Power Converters
TYPICAL APPLICATION 48W, 16VIN to 60VIN DC/DC µModule
®
Regulator Efficiency vs Load
VOUT 100 VIN 24VIN VIN VOUT 16V TO 60V 12V 90 4.7µF 4A 1M LTM8027 ×2 80 RUN BIAS1 70 SS BIAS2 22µF 60 SYNC AUX ×4 50 RT ADJ GND 40 48.7k 56.2k EFFICIENCY (%) 30 20 3845 TA01a 10 0 0 1 2 3 4 LOAD (A) 8027 TA01b 8027fd For more information www.linear.com/LTM8027 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Photograph Package Description Revision History Typical Application Related Parts