MIC2169B(2009) 查看數據表（PDF） - Micrel
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MIC2169B Datasheet PDF : 24 Pages
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Micrel, Inc.
Ordering Information
Part Number
MIC2169BYMME
Frequency
500kHz
Junction Temp. Range(1)
-40° to +125°C
Package
10-Pin ePad MSOP
Pin Configuration
VIN 1
VDD 2
CS 3
COMP/EN 4
FB 5
10 BST
9 HSD
8 VSW
7 LSD
EP
6 GND
10-Pin ePad MSOP (MME)
MIC2169B
Lead Finish
Pb-Free
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9
10
ePad
Pin Name
VIN
VDD
CS
COMP/EN
FB
GND
LSD
VSW
HSD
BST
EP
Pin Function
Supply Voltage (Input): +3V to +14.5V.
5V Internal Linear Regulator (Output): VDD is the external MOSFET gate drive
supply voltage and an internal supply bus for the IC. When VIN is <5V, short VDD
to the input supply through a 10Ω resistor.
Current Sense (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.
Compensation / Enable (Input): Dual function pin. Pin for external compensation.
If this pin is pulled below 0.25V, with the reference fully up the device shuts
down (50μA typical current draw).
Feedback (Input): Input to error amplifier. Regulates error amplifier to 0.8V.
Ground (Return).
Low-Side Drive (Output): High-current driver output for external synchronous
MOSFET.
Switch (Return): High-side MOSFET driver return.
High-Side Drive (Output): High-current output-driver for the high-side MOSFET.
When VIN is between 3.0V to 5V, 2.5V threshold MOSFETs should be used. At
VIN > 5V, 4.5V 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 VDD minus a diode drop.
Connect to Ground
June 2009
3
M9999- 060309-A
(408) 944-0800
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