Datasheet LTC3630A (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | High Efficiency, 76V 500mA Synchronous Step-Down Converter |
| 页数 / 页 | 26 / 1 — FeaTures. DescripTion. Wide Operating Input Voltage Range: 4V to 76V. … |
| 文件格式/大小 | PDF / 347 Kb |
| 文件语言 | 英语 |
FeaTures. DescripTion. Wide Operating Input Voltage Range: 4V to 76V. Synchronous Operation for Highest Efficiency
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LTC3630A High Efficiency, 76V 500mA Synchronous Step-Down Converter
FeaTures DescripTion
n
Wide Operating Input Voltage Range: 4V to 76V
The LTC®3630A is a high efficiency step-down DC/DC n
Synchronous Operation for Highest Efficiency
converter with internal high side and synchronous power n
Internal High Side and Low Side Power MOSFETs
switches that draws only 12μA typical DC supply current n
No Compensation Required
while maintaining a regulated output voltage at no load. n
Adjustable 50mA to 500mA Maximum Output Current
The LTC3630A can supply up to 500mA load current and n Low Dropout Operation: 100% Duty Cycle features a programmable peak current limit that provides n Low Quiescent Current: 12µA a simple method for optimizing efficiency and for reduc- n Wide Output Range: 0.8V to VIN ing output ripple and component size. The LTC3630A’s n 0.8V ±1% Feedback Voltage Reference combination of Burst Mode® operation, integrated power n Precise RUN Pin Threshold switches, low quiescent current, and programmable peak n Internal and External Soft-Start current limit provides high efficiency over a broad range n Programmable 1.8V, 3.3V, 5V or Adjustable Output of load currents. n Few External Components Required n Low Profile (0.75mm) 3mm × 5mm DFN and With its wide input range of 4V to 76V, the LTC3630A is Thermally-Enhanced MSE16 Packages a robust converter suited for regulating a wide variety of power sources. A feedback comparator output enables
applicaTions
multiple LTC3630As to be paralleled in higher current applications. n Industrial Control Supplies n Medical Devices The LTC3630A is available in the thermally-enhanced n Portable Instruments 3mm × 5mm DFN and the MSE16 packages. n Automotive
PARAMETER LTC3630A LTC3630
n Avionics Maximum Operating VIN 76V 65V L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks Absolute Maximum VIN 80V 70V and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Typical applicaTion Efficiency and Power Loss vs Load Current
100
12.5V to 76V Input to 12V Output, 500mA Step-Down Converter
VOUT = 12V 90 22µH V 80 OUT VIN V EFFICIENCY POWER LOSS (mW) IN SW 12V 12.5V TO 76V 70 1000 2.2µF LTC3630A 22µF 500mA 200k 60 RUN VFB 50 100 ISET SS 147k POWER LOSS 40 FBO VPRG1 EFFICIENCY (%) VPRG2 30 10 GND 20 3630a TA01a 10 VIN = 24V 1 VIN = 76V 00.1 1 10 100 1000 LOAD CURRENT (mA) 3630a TA01b 3630afc For more information www.linear.com/LTC3630A 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
Wide Operating Input Voltage Range: 4V to 76V
The LTC®3630A is a high efficiency step-down DC/DC n
Synchronous Operation for Highest Efficiency
converter with internal high side and synchronous power n
Internal High Side and Low Side Power MOSFETs
switches that draws only 12μA typical DC supply current n
No Compensation Required
while maintaining a regulated output voltage at no load. n
Adjustable 50mA to 500mA Maximum Output Current
The LTC3630A can supply up to 500mA load current and n Low Dropout Operation: 100% Duty Cycle features a programmable peak current limit that provides n Low Quiescent Current: 12µA a simple method for optimizing efficiency and for reduc- n Wide Output Range: 0.8V to VIN ing output ripple and component size. The LTC3630A’s n 0.8V ±1% Feedback Voltage Reference combination of Burst Mode® operation, integrated power n Precise RUN Pin Threshold switches, low quiescent current, and programmable peak n Internal and External Soft-Start current limit provides high efficiency over a broad range n Programmable 1.8V, 3.3V, 5V or Adjustable Output of load currents. n Few External Components Required n Low Profile (0.75mm) 3mm × 5mm DFN and With its wide input range of 4V to 76V, the LTC3630A is Thermally-Enhanced MSE16 Packages a robust converter suited for regulating a wide variety of power sources. A feedback comparator output enables
applicaTions
multiple LTC3630As to be paralleled in higher current applications. n Industrial Control Supplies n Medical Devices The LTC3630A is available in the thermally-enhanced n Portable Instruments 3mm × 5mm DFN and the MSE16 packages. n Automotive
PARAMETER LTC3630A LTC3630
n Avionics Maximum Operating VIN 76V 65V L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks Absolute Maximum VIN 80V 70V and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Typical applicaTion Efficiency and Power Loss vs Load Current
100
12.5V to 76V Input to 12V Output, 500mA Step-Down Converter
VOUT = 12V 90 22µH V 80 OUT VIN V EFFICIENCY POWER LOSS (mW) IN SW 12V 12.5V TO 76V 70 1000 2.2µF LTC3630A 22µF 500mA 200k 60 RUN VFB 50 100 ISET SS 147k POWER LOSS 40 FBO VPRG1 EFFICIENCY (%) VPRG2 30 10 GND 20 3630a TA01a 10 VIN = 24V 1 VIN = 76V 00.1 1 10 100 1000 LOAD CURRENT (mA) 3630a TA01b 3630afc For more information www.linear.com/LTC3630A 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