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MCP1256

Inductorless Positive Regulated Charge Pump

Status: In Production

Features:

  • High accuracy 3.3 V ±3.0 % output voltage
  • Accepts 1.8 V to 3.6 V input voltages
  • Supplies up to 100 mA output current
  • Low 20 mVp-p output voltage ripple
  • Integrated thermal shutdown and short circuit protection
  • Uses small ceramic capacitors
  • Operates at 650 kHz switching frequency
  • Low-power sleep mode feature on MCP1256/7
  • Bypass mode on MCP1258/9
  • Low-power 0.1 μA shutdown mode
  • Shutdown input compatible with 1.8 V logic
  • Soft-start circuitry to minimize inrush current
  • Available in 10 pin 3x3 DFN or 10 pin MSOP packages
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The MCP1256, MCP1257, MCP1258 and MCP1259 are inductorless, positive regulated charge pump DC/DC converters. Generating a regulated 3.3 V output voltage from a 1.8 V to 3.6 V input, they are specifically designed for applications operating from 2 cell alkaline, 2 cell Ni-Cd, 2 cell Ni-MH, or one primary lithium coin cell battery. These devices automatically switch from 1.5x to 2x boost operation modes to maintain high efficiency. In addition, at light output loads, the MCP1256 and MCP1257 can be placed in a sleep mode, lowering the quiescent current while maintaining the regulated output voltage. Alternatively, the MCP1258 and MCP1259 provide a bypass feature connecting the input voltage to the output. This allows for real-time clocks, microcontrollers or other system devices to remain biased with virtually no current being consumed by the MCP1258 or MPC1259. In normal operation, the charge pumps switch at a fixed 650 kHz, avoiding sensitive IF bands, and the output voltage ripple is below 20 mVP-P at load currents up to 100 mA. The MCP1256 and MCP1258 feature a power-good output that can be used to detect out-of-regulation conditions. The MCP1257 and MCP1259 feature a low battery indication that issues a warning if the input voltage drops below a preset voltage threshold. Extremely low supply current and few external parts (4 capacitors) make these devices ideal for small, battery powered applications. A shutdown mode is also provided for further power reduction. The devices incorporate thermal and short-circuit protection.

Additional Features
    • High accuracy 3.3 V ±3.0 % output voltage
    • Accepts 1.8 V to 3.6 V input voltages
    • Supplies up to 100 mA output current
    • Low 20 mVp-p output voltage ripple
    • Integrated thermal shutdown and short circuit protection
    • Uses small ceramic capacitors
    • Operates at 650 kHz switching frequency
    • Low-power sleep mode feature on MCP1256/7
    • Bypass mode on MCP1258/9
    • Low-power 0.1 μA shutdown mode
    • Shutdown input compatible with 1.8 V logic
    • Soft-start circuitry to minimize inrush current
    • Available in 10 pin 3x3 DFN or 10 pin MSOP packages
Parametrics
Name
Value
Typical Active Output Current (mA)
100
Output Voltage (V)
3.3
Typical Quiescent Current (µA)
1400
Input Voltage Range (V)
1.8 to 3.6
Operating Temp. Range (°C)
-40 to 125
Device Description
Regulated

Documents

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Data Sheets

06/23/2015
673KB

Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
MCP1256/7/8/9 Charge Pump Demo Board
MCP1256/7/8/9 Charge Pump Demo Board ( MCP1256/7/8/9EV )

The MCP1256/7/8/9 Charge Pump Evaluation Board is an evaluation and demonstration tool for Microchip Technology’s MCP1256/7/8/9 Regulated 3.3V, Low-Ripple Charge Pumps with Low Operating Current SLEEP Mode or BYPASS Mode. The design provides for dynamic versatility.

The MCP1256/7/8/9 Charge Pump Evaluation Board is setup to evaluate simple, stand-alone, dc-to-dc conversion....

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MCP1256-E/UN
0.023200
0.060000
10
MSOP
3x3mm
Matte Tin
e3
MCP1256T-E/UN
0.023200
0.200000
10
MSOP
3x3mm
Matte Tin
e3
MCP1256T-E/MF
0.023900
0.234849
10
DFN
3x3x0.9mm
Matte Tin
e3
MCP1256-E/MF
0.023900
0.041667
10
DFN
3x3x0.9mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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