參數(shù)資料
型號: EL7564C
英文描述: Monolithic 4 Amp DC:DC Step-Down Converter(4A,單片DC:DC步降轉(zhuǎn)換器)
中文描述: 單片4安培直流:DC降壓轉(zhuǎn)換器(4A條,單片直流:直流步降轉(zhuǎn)換器)
文件頁數(shù): 15/17頁
文件大?。?/td> 342K
代理商: EL7564C
7
EL7564C
Monolithic 4 Amp DC:DC Buck Converter
EL
7564C
Pin Descriptions
Pin Number
Pin Name
Pin Function
1
CREF
Bandgap reference bypass capacitor; typically 0.1uF to SGND
2
SGND
Control circuit negative supply
3
COSC
Oscillator timing capacitor (see performance curves)
4
VS
Control circuit positive supply; normally connected to VIN
5
PSHR
Power share and junction temperature monitor; connect to PSHR input of parallel regulator(s) for load sharing, with 1nF to
SGND
6
PGND
Ground return of the regulator; connected to the source of the low-side synchronous NMOS power FET
7
PGND
Ground return of the regulator; connected to the source of the low-side synchronous NMOS power FET
8
VIN
Power supply input of the regulator; connected to the drain of the high-side NMOS power FET
9
STP
Auxilliary supply tracking positive input; tied to regulator output to synchronize start up with a second supply; leave open
for stand alone operation; 2uA internal pull down current
10
STN
Auxilliary supply tracking negative input; connect to output of a second supply to synchronize start up; leave open for stand
alone operation; 2uA internal pull up current
11
PGND
Ground return of the regulator; connected to the source of the low-side synchronous NMOS power FET
12
PGND
Ground return of the regulator; connected to the source of the low-side synchronous NMOS power FET
13
PGND
Ground return of the regulator; connected to the source of the low-side synchronous NMOS power FET
14
LX
Inductor drive pin; high current digital output whose average voltage equals the regulator output voltage
15
LX
Inductor drive pin; high current digital output whose average voltage equals the regulator output voltage
16
VHI
Positive supply of high-side driver; boot strapped from VDRV to LX with an external 0.22uF capacitor
17
VDRV
Positive supply of low-side driver and input voltage for high side boot strap
18
PG
Power good window comparator output; logic 1 when regulator output is within ±10% of target output voltage
19
FB
Voltage feedback input; connected to external resistor divider between VOUT and SGND; a 125nA pull-up current forces
VOUT to SGND in the event that FB is floating
20
EN
Chip enable, active high; a 2uA internal pull up current enables the device if the pin is left open
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