MCP1256T-E/UN More Semiconductors - ICs by Microchip Technology

Inductorless Positive Regulated Charge Pump

Status: Active
Series: MCP1256
RoHS: Compliant
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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.

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Prices starting from US$1.43

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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

Specifications

Typical Active Output Current (mA) 100
Output Voltage (V) 3.3
Typical Quiescent Current (µA) 1400
Vin Max (V) 3.6
Vin Min (V) 1.8
Temp. Range Max. (°C) 125
Temp. Range Min. (°C) -40
Pins | Packaging 10 | MSOP
Temp Range -40C to +125C
Packing Media Tape and reel (2500)

Environmental Information

JEDEC Indicator e3
ROHS Compliant
China EFUP Compliant
Device Weight (g) 0.0232
Shipping Weight (kg) 0.2
Lead Count 10
Package Type MSOP
Package Width or Size 3x3mm
Soldering Composition Matte Tin

Alternative Descriptions

REG. CHARGE PUMP | Microchip Technology
Ic,smps Controller,voltage-Mode,mos,tssop,10Pin,plastic Rohs Compliant: Yes |Microchip MCP1256T-E/UN | Newark Electronics
Conv DC-DC Single Step Up 1.8V to 3.6V 10-Pin MSOP T/R | Avnet America
Fractional Charge Pump with PG and Sleep | Microchip Technology Inc. MCP1256T-E/UN | RS Americas


Frequently Asked Questions

Where can I find additional details, specifications and documents for a MCP1256T-E/UN?

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What category does MCP1256T-E/UN fall under?

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Is the MCP1256T-E/UN RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Microchip Technology.

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