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参数资料
| 型号： | SC1154CSW |
| 厂商： | Semtech Corporation |
| 英文描述： | PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS |
| 中文描述： | 可编程同步DC / DC滞控制器的先进的处理器 |
| 文件页数： | 12/18页 |
| 文件大小： | 164K |
| 代理商： | SC1154CSW |
SC1154
PROGRAMMABLE SYNCHRONOUS
DC/DC HYSTERETIC CONTROLLER
FOR ADVANCED PROCESSORS
2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
PRELIMINARY - March 1, 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 ILOAD.
2
DROOP
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.
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.
13
LOWDR
Low Side Driver Output.
14
DRV
Drive Regulator for the MOSFET Drivers.
15
VIN12V
12V Supply.
16
BOOT
Bootstrap. This pin is used to generate a floating drive for the high side FET driver.
17
HIGHDR
High Side Driver Output.
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)
Programming Input (MSB).
24
VID3
(1)
Programming Input.
25
VID2
(1)
Programming Input.
26
VID1
(1)
Programming Input.
27
VID0
(1)
Programming Input (LSB).
28
PWRGD
(1)
Power Good. This open collector logic output is high if the output voltage is within 5% of the set
point.
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| SC1155 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Programmable Synchronous DC/DC Hysteretic Controller with VRM 9.0VID Range |
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| SC1155CSW.TR | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE |
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