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| 型号： | MCP1602-120I/MF |
| 厂商： | Microchip Technology |
| 文件页数： | 11/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 1.2V 0.5A 8DFN |
| 标准包装： | 120 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1.2V |
| 输入电压： | 2.7 V ~ 5.5 V |
| 频率 - 开关： | 2MHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-VDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 8-DFN-EP（3x3） |
| 产品目录页面： | 668 (CN2011-ZH PDF) |
MCP1602
3.0
PIN DESCRIPTIONS
TABLE 3-1:
PIN FUNCTION TABLE
MSOP
1
2
3
4
5
6
7
8
—
DFN
1
2
3
4
5
6
7
8
Exposed
Pad
Sym
SHDN
V CC
PG
A GND
V FB /V OUT
V IN
L X
P GND
EP
Description
Shutdown Input Pin
Analog Input Supply Voltage Pin
Power Good Output Pin
Analog Ground Pin
Feedback Voltage (Adjustable Version) / Output Voltage (Fixed Version) Pin
Input Supply Voltage Pin
Buck Inductor Output Pin
Power Ground Pin
For the DFN package, the center exposed pad is a thermal path to remove
heat from the device. Electrically this pad is at ground potential and should
be connected to A GND
3.1
Shutdown Control Input Pin
3.6
Power Supply Input Voltage Pin
(SHDN)
The SHDN pin is a logic-level input used to enable or
disable the device. A logic high (>45% of V IN ) will
(V IN )
V IN is the buck regulator power input supply pin.
Connect a variable input voltage source to V IN .
enable the regulator output. A logic-low (<15% of V IN )
will ensure that the regulator is disabled.
3.7
Buck Inductor Output Pin (L X )
3.2
Analog Input Supply Voltage Pin
(V CC )
Connect L X directly to the buck inductor. This pin
carries large signal-level current; all connections
should be made as short as possible.
The V CC pin provides bias for internal analog functions.
This voltage is derived by filtering the V IN supply.
3.8
Power Ground Pin (P GND )
3.3
Power-Good Output Pin (PG)
Connect all large signal level ground returns to P GND .
These large signal level ground traces should have a
PG is an output level indicating that the output voltage
is within 94% of regulation. The PG output is configured
as an open-drain output.
3.4 Analog Ground Pin (A GND )
A GND is the analog ground connection. Tie A GND to the
analog portion of the ground plane (A GND ). See the
Layout Information” section for ground recommenda-
tions.
small loop area and length to prevent coupling of
switching noise to sensitive traces.
3.9 Exposed Metal Pad (EP)
For the DFN package, connect the Exposed Pad to
A GND , with vias into the A GND plane. This connection to
the A GND plane will aid in heat removal from the
package.
3.5
Output Voltage Sense Pin (V FB /
V OUT )
For the adjustable output voltage options, connect the
center of the output voltage divider to the V FB pin. For
fixed-output voltage options, connect the output of the
buck regulator to this pin (V OUT ).
? 2007 Microchip Technology Inc.
DS22061A-page 11
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