MCP1624(2010) 查看數據表（PDF） - Microchip Technology
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MCP1624 Datasheet PDF : 26 Pages
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MCP1623/24
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
Pin No.
SW
GND
EN
FB
VOUT
VIN
PIN FUNCTION TABLE
MCP1623/24 SOT23
Description
1
Switch Node, Boost Inductor Input Pin
2
Ground Pin
3
Enable Control Input Pin
4
Feedback Voltage Pin
5
Output Voltage Pin
6
Input Voltage Pin
3.1 Switch Node Pin (SW)
Connect the inductor from the input voltage to the SW
pin. The SW pin carries inductor current and can be as
high as 425 mA peak. The integrated N-Channel switch
drain and integrated P-Channel switch source are inter-
nally connected at the SW node.
3.2 Ground Pin (GND)
The ground or return pin is used for circuit ground
connection. Length of trace from input cap return, output
cap return and GND pin should be made as short as
possible to minimize noise on the GND pin.
3.3 Enable Pin (EN)
The EN pin is a logic-level input used to enable or
disable device switching and lower quiescent current
while disabled. A logic high (>90% of VIN) will enable
the regulator output. A logic low (<20% of VIN) will
ensure that the regulator is disabled.
3.4 Feedback Voltage Pin (FB)
The FB pin is used to provide output voltage regulation
by using a resistor divider. The FB voltage will be 1.21V
typical with the output voltage in regulation.
3.5 Output Voltage Pin (VOUT)
The output voltage pin connects the integrated
P-Channel MOSFET to the output capacitor. The FB
voltage divider is also connected to the VOUT pin for
voltage regulation.
3.6 Power Supply Input Voltage Pin
(VIN)
Connect the input voltage source to VIN. The input
source should be decoupled to GND with a 4.7 µF
minimum capacitor.
2010 Microchip Technology Inc.
DS41420B-page 9
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