MCP1612-300I/MS Microchip Technology, MCP1612-300I/MS Datasheet - Page 9

• Manufacturer Part Number: MCP1612-300I/MS
• Description: Switching Converters, Regulators & Controllers 1.4MHz 1A Synch-Buck
• Manufacturer: Microchip Technology

Specifications of MCP1612-300I/MS

• Output Current: 1.0 A
• Mounting Style: SMD/SMT
• Package / Case: MSOP-8
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

3.0
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
3.1
Connect the input voltage source to the V
normal operation, the voltage on the V
between +2.7V and +5.5V. A 10 µF bypass capacitor
should be connected between the V
pin.
3.2
The V
This voltage is derived by filtering the V
3.3
Connect SHDN to a logic level input to turn the regula-
tor on or off. A logic-high (>45% of V
regulator. A logic-low (<15% of V
regulator into Shutdown mode. When in shutdown,
both the P-Channel and N-Channel switches are
turned off.
3.4
COMP is the internal transconductance amplifier
output pin. External compensation is connected to the
COMP pin for control-loop stabilization.
 2004 Microchip Technology Inc.
Pin No.
CC
1
2
3
4
5
6
7
8
MCP1612 PIN DESCRIPTIONS
Input Voltage Pin (V
Analog Input Voltage Pin (V
pin provides bias for internal analog functions.
Shutdown Input Pin (SHDN)
Compensation Pin (COMP)
COMP
SHDN
Name
A
P
PIN FUNCTION TABLE
V
V
FB
GND
GND
L
CC
IN
X
Input Voltage Pin
Analog Input Voltage Pin
Shutdown Control Input Pin
Transconductance Amplifier Output Pin
Feedback Input Pin
Analog Ground Pin
Power Ground Pin
Buck Inductor Output Pin
IN
IN
IN
IN
)
pin and the P
) will force the
IN
) will enable the
IN
pin should be
supply.
IN
CC
pin. For
)
GND
3.5
Connect the output voltage of the Buck converter
through an external resistor divider to the FB pin to
regulate the output voltage. The nominal voltage that is
compared to this input for pulse termination is 0.8V.
3.6
Tie all small-signal ground returns to A
this ground can effect the sensitive internal analog
measurements.
3.7
Connect all large-signal ground returns to P
large-signal traces should have a small loop area and
length to prevent coupling of switching noise to
sensitive traces.
3.8
Connect L
carries large signal-level currents and all connections
should be made as short as possible.
Function
Feedback Pin (FB)
Analog Ground Pin (A
Power Ground Pin (P
Buck Inductor Output Pin (L
X
directly to the Buck inductor. This pin
MCP1612
GND
DS21921A-page 9
GND
GND
)
)
GND
. Noise on
X
. These
)