MCP1259

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.

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
Parameter
Parameter Name Value Value
Typical Active Output Current (mA) 100 100
Output Voltage (V) 3.3 3.3
Typical Quiescent Current (µA) 1400 1400
Input Voltage Range (V) 1.8 to 3.6 1.8 to 3.6
Operating Temp. Range (°C) -40 to 125 -40 to 125
Device Description Regulated Regulated
Documents
MCP1256/7/8/9 Data SheetData Sheets02/05/2013673KB
Electronic Solutions for Medical and FitnessBrochures09/10/201410216KB
Analog & Interface Product Selector GuideProduct Line Card03/21/20164116KB
MCP1256/7/8/9 Charge Pump Evaluation Board User's GuideUser Guides03/08/2006705KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MCP1259-E/MF10DFN-40C to +125CTUBE1.461.221.111.071.06
MCP1259-E/UN10MSOP-40C to +125CTUBE1.461.221.111.071.06
MCP1259T-E/MF10DFN-40C to +125CT/R1.461.221.111.071.06
MCP1259T-E/UN10MSOP-40C to +125CT/R1.461.221.111.071.06
相关开发工具
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MCP1259-E/MF0.0239000.04166710DFN3x3x0.9mmMatte Tine3
MCP1259T-E/MF0.0239000.23484910DFN3x3x0.9mmMatte Tine3
MCP1259T-E/UN0.0232000.20000010MSOP3x3mmMatte Tine3
MCP1259-E/UN0.0232000.06000010MSOP3x3mmMatte Tine3
MCP1256/7/8/9 Data Sheet MCP1259
MCP1256/7/8/9 Data Sheet MCP1256/7/8/9EV
Electronic Solutions for Medical and Fitness 24VL025
Analog & Interface Product Selector Guide ENC624J600
MCP1256/7/8/9 Charge Pump Evaluation Board User's Guide MCP1256/7/8/9EV