參數(shù)資料
型號(hào)： SC1155CSW
廠商： Semtech Corporation
英文描述： PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE
中文描述： 可編程同步DC / DC控制器，電源模組采用滯回西元范圍9.0
文件頁(yè)數(shù)： 3/19頁(yè)
文件大小： 190K
代理商： SC1155CSW
SC1155
PROGRAMMABLE SYNCHRONOUS
DC/DC HYSTERETIC CONTROLLER
WITH VRM 9.0 VID RANGE
2000 SEMTECH CORP.
PRELIMINARY - August 7, 2000
3
PIN DESCRIPTION
Pin
Pin Name Pin Function
1
IOUT
Current Out. The output voltage on this pin is proportional to the load current as measured
across the high side MOSFET, and is approximately equal to 2 x R
DS(ON)
x I
LOAD
.
Droop Voltage. This pin is used to set the amount of output voltage set-point droop as a
function of load current. The voltage is set by a resistor divider between IOUT and AGND.
2
DROOP
3
OCP
Over Current Protection. This pin is used to set the trip point for over current protection by a
resistor divider between IOUT and AGND.
4
VHYST
Hysteresis Set Pin. This pin is used to set the amount of hysteresis required by a resistor
divider between VREFB and AGND.
5
VREFB
Buffered Reference Voltage (from VID circuitry).
6
VSENSE
Output Voltage Sense.
7
AGND
Small Signal Analog and Digital Ground.
8
SOFTST
Soft Start. Connecting a capacitor from this pin to AGND sets the time delay.
9
NC
Not connected
10
LODRV
Low Drive Control. Connecting this pin to +5V enables normal operation. When LOHIB is
grounded, this pin can be used to control LOWDR.
11
LOHIB
Low Side Inhibit. This pin is used to eliminate shoot-thru current.
12
DRVGND Power Ground. Insure output capacitor ground is connected to this pin.
13
LOWDR
Low Side Driver Output. Connect to gate of low side MOSFET.
14
DRV
Drive Regulator for the MOSFET Drivers.
15
VIN12V
12V Supply. Connect to 12V power rail.
16
BOOT
Bootstrap. This pin is used to generate a floating drive for the high side FET driver.
17
HIGHDR
High Side Driver Output. Connect to gate of high side MOSFET.
18
BOOTLO Bootstrap Low. In desktop applications, this pin connects to DRVGND.
19
HISENSE High Current Sense. Connected to the drain of the high side FET, or the input side of a current
sense resistor between the input and the high side FET.
20
LOSENSE Low Current Sense. Connected to the source of the high side FET, or the FET side of a current
sense resistor between the input and the high side FET.
21
IOUTLO
This is the sampling capacitors bottom leg. Voltage on this pin is voltage on the LOSENSE pin
when the high side FET is on.
22
INHIBIT
Inhibit. If this pin is grounded, the MOSFET drivers are disabled. Usually connected to +5V
through a pull-up resistor.
23
VID4
(1)
VID3
(1)
VID2
(1)
VID1
(1)
VID0
(1)
PWRGD
(1)
Power Good. This open collector logic output is high if the output voltage is within 5% of the set
point.
Programming Input (MSB).
24
Programming Input.
25
Programming Input.
26
Programming Input.
27
Programming Input (LSB).
28
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SC1155CSW.TR 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE
SC1155CSWTR 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Programmable Synchronous DC/DC Hysteretic Controller with VRM 9.0VID Range
SC1155EVB 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE
SC1156 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED MICROPROCESSORS
SC1156CSW 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED MICROPROCESSORS
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