MCP1252-ADJI/MS Microchip Technology, MCP1252-ADJI/MS Datasheet - Page 8
![IC CHRG PUMP DC/DCCONV ADJ 8MSOP](/photos/6/59/65932/mfg_150_c04-111_ms_8-msop_sml.jpg)
MCP1252-ADJI/MS
Manufacturer Part Number
MCP1252-ADJI/MS
Description
IC CHRG PUMP DC/DCCONV ADJ 8MSOP
Manufacturer
Microchip Technology
Type
Step-Down (Buck), Step-Up (Boost), Switched Capacitor (Charge Pump)r
Specifications of MCP1252-ADJI/MS
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
1.5 ~ 5.5 V
Current - Output
120mA
Frequency - Switching
650kHz
Voltage - Input
2 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Function
Step Up/Step Down
Output Voltage
1.5 V to 5.5 V
Output Current
120 mA
Maximum Operating Temperature
+ 85 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MCP1252-ADJI/MS
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
MCP1252/3
3.0
TABLE 3-1:
3.1
PGOOD is a high-impedance when the output voltage
is in regulation. A logic-low is asserted when the output
falls 7% (typical) below the nominal value. The PGOOD
output remains low until V
its nominal value. On start-up, this pin indicates when
the output voltage reaches its final value. PGOOD is
high-impedance when SHDN is low.
3.2
Bypass to GND with a filter capacitor.
3.3
It is recommended that V
capacitor.
3.4
It is recommended that the ground pin be tied to a
ground plane for best performance.
3.5
The charge pump capacitor (flying capacitor) is used to
transfer charge from the input supply to the regulated
output.
It is recommended that a low ESR (equivalent series
resistance) capacitor be used.
DS21752A-page 8
Pin
No.
1
2
3
4
5
6
7
8
SELECT
PGOOD
PIN FUNCTIONS
Open-Drain Power Good Output
(PGOOD)
Regulated Output Voltage (V
Power Supply Input (V
Ground (GND)
Flying Capacitor Negative
Terminal (C-)
SHDN
Name
V
GND
V
C+
FB
OUT
C-
IN
PIN FUNCTION TABLE
Open-Drain Power GOOD Output
Regulated Output Voltage
Power Supply Input
Ground Terminal
Flying Capacitor Negative Terminal
Flying Capacitor Positive Terminal
Shutdown Mode, Active-Low Input
Output Voltage Select Pin.
(MCP1252-33X50, MCP1253-33X50)
Feedback Input Pin for Adjustable Output
(MCP1252-ADJ, MCP1253-ADJ)
IN
OUT
be tied to a ceramic bypass
is within 3% (typical) of
Function
IN
)
OUT
)
3.6
The charge pump capacitor (flying capacitor) is used to
transfer charge from the input supply to the regulated
output.
Proper orientation is imperative when using a polarized
capacitor.
3.7
A logic-low signal applied to SHDN disables the device.
A logic-high signal applied to this pin allows normal
operation.
3.8
MCP1252-33X50, MCP1253-33X50:
SELECT: Select Input Pin.
Connect SELECT to V
SELECT to GND for a 5.0V fixed output.
MCP1252-ADJ, MCP1253-ADJ:
FB: Feedback Pin.
A resistor divider connected to this pin determines the
adjustable V
Flying Capacitor Positive Terminal
(C+)
Shutdown Input (SHDN)
Select (SELECT) Input or
Feedback (FB) Input
OUT
value (1.5V to 5.5V).
IN
for 3.3V fixed output. Connect
2002 Microchip Technology Inc.