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參數(shù)資料
| 型號(hào)： | MIC3000 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | SFP Management IC |
| 中文描述： | SFP管理IC |
| 文件頁(yè)數(shù)： | 2/10頁(yè) |
| 文件大?。?/td> | 63K |
| 代理商： | MIC3000 |
MIC2194
Micrel
MIC2194
2
October 2002
Pin Configuration
1
COMP
FB
EN/UVLO
CS
8
VIN
OUTP
GND
VDD
7
6
5
2
3
4
8 Lead SOIC (M)
Ordering Information
Part Number
MIC2194BM
Output Voltage
Adjustable
Frequency
400KHz
Junction Temp. Range
–
40
°
C to +125
°
C
Package
8-lead SOP
Pin Description
Pin Number
Pin Name
Pin Function
1
COMP
Compensation (Output): Internal error amplifier output. Connect to a
capacitor or series RC network to compensate the regulator
’
s control loop.
2
FB
Feedback (Input): The circuit regulates this pin to 1.245V.
3
EN/UVLO
Enable/Undervoltage Lockout (Input): A low level on this pin will power down
the device, reducing the quiescent current to under 0.5
μ
A. This pin has two
separate thresholds, below 1.5V the output switching is disabled, and below
0.9V the device is forced into a complete micropower shutdown. The 1.5V
threshold functions as an accurate undervoltage lockout (UVLO) with
hysteresis.
4
CS
The (
–
) input to the current limit comparator. A built-in offset of 110mV
between VIN and CSL in conjunction with the current sense resistor sets the
current limit threshold level. This is also the (
–
) input to the current amplifier.
5
VDD
3V internal linear-regulator output. VDD is also the supply voltage bus for the
chip. Bypass to GND with 1
μ
F.
6
GND
Ground.
7
OUTP
High current drive for the synchronous N-channel MOSFET. Voltage swing
is from ground to VIN. On-resistance is typically 3
@ 5V
IN
.
Input voltage to the circuit. Also the high side input to the current sense
amplifier supplies power to the gate drive circuit.
8
VIN
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