Datasheet LTC7803 (Analog Devices) - 10
| 制造商 | Analog Devices |
| 描述 | 40V Low IQ, 3MHz Synchronous Step-Down Controller with Spread Spectrum |
| 页数 / 页 | 36 / 10 — PIN FUNCTIONS (MSOP/QFN). TG(Pin 15/Pin 1):. GND (Exposed Pad Pin … |
| 文件格式/大小 | PDF / 1.6 Mb |
| 文件语言 | 英语 |
PIN FUNCTIONS (MSOP/QFN). TG(Pin 15/Pin 1):. GND (Exposed Pad Pin 17/Exposed Pad Pin 17):. SW(Pin 16/Pin 2):
该数据表的模型线
- LTC7803EMSE#PBF LTC7803EMSE#TRPBF LTC7803EMSE#WPBF LTC7803EMSE#WTRPBF LTC7803EUD#PBF LTC7803EUD#TRPBF LTC7803EUD#WPBF LTC7803EUD#WTRPBF LTC7803HMSE#PBF LTC7803HMSE#TRPBF LTC7803HMSE#WPBF LTC7803HMSE#WTRPBF LTC7803HUD#PBF LTC7803HUD#TRPBF LTC7803HUD#WPBF LTC7803HUD#WTRPBF LTC7803IMSE#PBF LTC7803IMSE#TRPBF LTC7803IMSE#WPBF LTC7803IMSE#WTRPBF LTC7803IUD#PBF LTC7803IUD#TRPBF LTC7803IUD#WPBF LTC7803IUD#WTRPBF LTC7803JMSE#PBF LTC7803JMSE#TRPBF LTC7803JMSE#WPBF LTC7803JMSE#WTRPBF LTC7803JUD#PBF LTC7803JUD#TRPBF LTC7803JUD#WPBF LTC7803JUD#WTRPBF
文件文字版本
LTC7803
PIN FUNCTIONS (MSOP/QFN) TG(Pin 15/Pin 1):
High Current Gate Drive for the Top
GND (Exposed Pad Pin 17/Exposed Pad Pin 17):
Ground. N-Channel MOSFET. This is the output of floating driver Connects to the source of the bottom (main) N-channel with a voltage swing of INTVCC superimposed on the MOSFET and the (–) terminal(s) of CIN and COUT. All switch node voltage SW. small-signal components and compensation components
SW(Pin 16/Pin 2):
Switch Node Connection to the should also connect to this ground. The exposed pad must Inductor. be soldered to the PCB for rated thermal performance.
FUNCTIONAL DIAGRAM
INTVCC V D IN BOOST B CHARGE PUMP CB DROP TG TOP OUT C FREQ IN DET SPREAD SPECTRUM SW TOP ON PLLIN/SPREAD OSCILLATOR S Q AND PLL INTV R Q CC SWITCH SHDN BG LOGIC BOT + RUN 1.2V – + L R MODE 0.425V SENSE SLEEP V – OUT COUT 100k ICMP IR – + + – – + + – 2mV SENSE+ V 2.7V IN 0.65V SENSE– EXTVCC SLOPE COMP VFB 5.15V 5.15V + RB LDO LDO EA – 0.80V TRACK/SS RA EN EN + + OV – 4.7V – 0.88V ITH RC GND INTVCC SHDN CC2 C 12.5µA C RST FOLDBACK TRACK/SS 2(VFB) SHDN CSS 7803 FD Rev 0 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Typical Application Related Parts
PIN FUNCTIONS (MSOP/QFN) TG(Pin 15/Pin 1):
High Current Gate Drive for the Top
GND (Exposed Pad Pin 17/Exposed Pad Pin 17):
Ground. N-Channel MOSFET. This is the output of floating driver Connects to the source of the bottom (main) N-channel with a voltage swing of INTVCC superimposed on the MOSFET and the (–) terminal(s) of CIN and COUT. All switch node voltage SW. small-signal components and compensation components
SW(Pin 16/Pin 2):
Switch Node Connection to the should also connect to this ground. The exposed pad must Inductor. be soldered to the PCB for rated thermal performance.
FUNCTIONAL DIAGRAM
INTVCC V D IN BOOST B CHARGE PUMP CB DROP TG TOP OUT C FREQ IN DET SPREAD SPECTRUM SW TOP ON PLLIN/SPREAD OSCILLATOR S Q AND PLL INTV R Q CC SWITCH SHDN BG LOGIC BOT + RUN 1.2V – + L R MODE 0.425V SENSE SLEEP V – OUT COUT 100k ICMP IR – + + – – + + – 2mV SENSE+ V 2.7V IN 0.65V SENSE– EXTVCC SLOPE COMP VFB 5.15V 5.15V + RB LDO LDO EA – 0.80V TRACK/SS RA EN EN + + OV – 4.7V – 0.88V ITH RC GND INTVCC SHDN CC2 C 12.5µA C RST FOLDBACK TRACK/SS 2(VFB) SHDN CSS 7803 FD Rev 0 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Typical Application Related Parts