MCP1252-ADJ Microchip Technology Inc., MCP1252-ADJ Datasheet
MCP1252-ADJ
Available stocks
Related parts for MCP1252-ADJ
MCP1252-ADJ Summary of contents
Page 1
... The MCP1252 has a switching frequency of 650 kHz, avoiding interference with sensitive IF bands. The MCP1253 has a switching frequency of 1 MHz and allows the use of smaller capacitors than the MCP1252, thus saving board space and cost ...
Page 2
... MCP1252/3 Functional Block Diagram PGOOD V OUT V IN GND PGOOD V OUT V IN GND DS21752A-page 2 MCP1252-33X50 MCP1253-33X50 140 k - 173 100 1.21V + - + 200 mV Switch Control MCP1252-ADJ MCP1253-ADJ - + 1.21V + - + 200 mV Switch Control SELECT SHDN SHDN C+ C- 2002 Microchip Technology Inc. ...
Page 3
... SELECT Logic Input Voltage High V Selectable Output - MCP1252-33X50, MCP1253-33X50: SELECT = GND, V Supply Voltage V Output Voltage Accuracy V Output Current I OUT SELECT Logic Input Voltage Low V Adjustable Output - MCP1252-ADJ, MCP1253-ADJ Supply Voltage V Output Voltage Adjustment Range V FB Regulation Voltage V ALL DEVICES Supply Current I Output Short-Circuit Current I ...
Page 4
... J T -65 — +150 A — 206 — °C -40°C to +85° mA. OUT Units Conditions kHz MCP1252 kHz MCP1253 mV MCP1252 p-p mV MCP1253 p-p µsec SELECT = V IN µsec SELECT = GND V = 3.6V mA, IN OUT SHDN = V , IH(MIN) V from 0 to 90% Nominal OUT Regulated Output Voltage Conditions ° ...
Page 5
... FIGURE 2-5: Voltage (MCP1252-33X50). 100 3.0V OUT 0 5.0 5.5 6.0 1.5 FIGURE 2-6: Voltage (MCP1252-ADJ). MCP1252 all capacitors X7R ceramic. µ FLY 120 mA MCP1252-33X50 SELECT = GND V = 5.0V OUT 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Supply Voltage (V) Percent Efficiency vs 120 mA MCP1252-33X50 SELECT = 3.3V OUT 2 ...
Page 6
... MCP1253-33X50 5.02 5.01 MCP1252-33X50 5.00 SELECT = GND V OUT 4. 120 mA OUT 4.98 -40 -25 - 110 125 Temperature (°C) FIGURE 2-7: Output Voltage vs. Temperature (MCP1252-33X50, MCP1253-33X50). 3.33 MCP1253-33X50 3.32 3.31 MCP1252-33X50 3.30 SELECT = V V OUT 3.29 I OUT 3.28 -40 -25 - 110 125 Temperature (°C) FIGURE 2-8: Output Voltage vs. ...
Page 7
... Output Voltage Ripple vs. Supply Voltage (MCP1252-33X50 120 MCP1252-33X50 20 SELECT = OUT 0 2.0 2.5 3.0 3.5 4.0 4.5 Supply Voltage (V) FIGURE 2-14: Output Voltage Ripple vs. Supply Voltage (MCP1252-33X50). FIGURE 2-15: Start-Up (MCP1252-33X50). 2002 Microchip Technology Inc. = 3.6V 25° 10mF OUT = 5.0V 5.0 5.5 6.0 FIGURE 2-16: Time 3.3V 5.0 5.5 6.0 FIGURE 2-17: Time. FIGURE 2-18: MCP1252/3 = 1mF, all capacitors X7R ceramic ...
Page 8
... A logic-high signal applied to this pin allows normal operation. 3.8 Select (SELECT) Input or Feedback (FB) Input 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 OUT ) OUT ) IN for 3 ...
Page 9
... DEVICE OVERVIEW 4.1 Theory of Operation The MCP1252 and MCP1253 family of devices employ a switched capacitor charge pump to buck or boost an input supply voltage ( regulated output voltage. IN Referring to the Functional Block Diagram and Figure 4-1, the devices perform conversion and regula- tion in three phases. When the devices are not in shut- ...
Page 10
... MCP1253-33X50) or adjustable from an external resistive divider when the adjustable device is chosen (MCP1252-ADJ, MCP1253-ADJ). If the regulator output voltage falls below 0.93V ical) for less than 200 µsec and then recovers, glitch- immunity circuits prevent the PGOOD signal from tran- sitioning low ...
Page 11
... Connect SELECT to GND for a regulated 5.0V output and connect SELECT to V for a regulated 3.3V output. IN The MCP1252-ADJ and MCP1253-ADJ utilize an external resistor divider that allows the output voltage to be adjusted between 1.5V and 5.5V. For an adjust- able output, connect a resistor between and another resistor between FB and GND (R ...
Page 12
... WHITE LEDS OUT 10 µF 8 SHDN SELECT 59 4 PGOOD GND MCP1252-ADJ 1 µ WHITE LEDS OUT µF 8 SHDN SELECT PGOOD GND MCP1252-ADJ 2002 Microchip Technology Inc. ...
Page 13
... In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line thus limiting the number of available characters for customer specific information. * Standard OTP marking consists of Microchip part number, year code, week code, and traceability code. 2002 Microchip Technology Inc. MCP1252/3 Example: 1252SX 233025 Example: 1253DJ ...
Page 14
... MCP1252/3 8-Lead Plastic Micro Small Outline Package (MS) (MSOP (F) Dimension Limits Number of Pins Pitch Overall Height Molded Package Thickness Standoff § Overall Width Molded Package Width Overall Length Foot Length Footprint (Reference) Foot Angle Lead Thickness Lead Width Mold Draft Angle Top ...
Page 15
... Register on our web site (www.microchip.com/cn) to receive the most current information on our products. 2002 Microchip Technology Inc. MCP1252/3 Examples: a) MCP1252-33X50I/MS: Low Noise, Positive- Regulated Charge Pump, Fixed Output b) MCP1252-ADJI/MS: Low Noise, Positive- Regulated Charge Pump, Adjustable Output c) MCP1252T-33X50I/MS: Tape and Reel, Low Noise, Positive-Regulated Charge ...
Page 16
... MCP1252/3 NOTES: DS21752A-page 16 2002 Microchip Technology Inc. ...
Page 17
... Microchip. No licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. 2002 Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, K MPLAB, PIC, PICmicro, PICSTART and PRO MATE are registered trademarks of Microchip Technology Incorporated in the U ...
Page 18
... Centro Direzionale Colleoni Palazzo Taurus Colleoni 1 20041 Agrate Brianza Milan, Italy Tel: 39-039-65791-1 Fax: 39-039-6899883 United Kingdom Microchip Ltd. 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44 118 921 5869 Fax: 44-118 921-5820 11/15/02 2002 Microchip Technology Inc. ...