參數(shù)資料
型號(hào)： MIC2169MM
廠商： Micrel Semiconductor,Inc.
英文描述： 500 KHZ PWM SYNCHRONOUS BUCK CONTROL IC
中文描述： 500千赫的PWM同步降壓控制IC
文件頁(yè)數(shù)： 2/14頁(yè)
文件大?。?/td> 160K
代理商： MIC2169MM
MIC2169
Ordering Information
Micrel
M9999-111803
2
November 2003
Pin Configuration
FB
GND
6
5
1
VIN
VDD
CS
COMP/EN
10 BST
HSD
VSW
LSD
9
8
7
2
3
4
10-Pin MSOP (MM)
Pin Description
Pin Number
Pin Name
Pin Function
1
VIN
Supply Voltage (Input): 3V to 14.5V.
2
VDD
5V Internal Linear Regulator (Output): V
DD
is the external MOSFET gate
drive supply voltage and an internal supply bus for the IC. When V
IN
is <5V,
this regulator operates in dropout mode.
3
CS
Current Sense / Enable (Input): Current-limit comparator noninverting input.
The current limit is sensed across the MOSFET during the ON time. The
current can be set by the resistor in series with the CS pin.
4
COMP/EN
Compensation (Input): Dual function pin. Pin for external compensation. If
this pin is pulled below 0.2V, with the reference fully up the device shuts
down (50
μ
A typical current draw).
5
FB
Feedback (Input): Input to error amplifier. Regulates error amplifier to 0.8V.
6
GND
Ground (Return).
7
LSD
Low-Side Drive (Output): High-current driver output for external synchro-
nous MOSFET.
8
VSW
Switch (Return): High-side MOSFET driver return.
9
HSD
High-Side Drive (Output): High-current output-driver for the high-side
MOSFET. When V
IN
is between 3.0V to 5V, 2.5V threshold MOSFETs
should be used. At V
IN
> 5V, 5V threshold MOSFETs should be used.
Boost (Input): Provides the drive voltage for the high-side MOSFET driver.
The gate-drive voltage is higher than the source voltage by V
IN
minus a
diode drop.
10
BST
Part Number
MIC2169BMM
Frequency
500kHz
Junction Temp. Range
–
40
°
C to +125
°
C
Package
10-lead MSOP
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