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Overview
| Topology | Boost Converter |
| Input voltage | 3.6-4.2 V |
| Switching frequency | 425-575 kHz |
| Output 1 | 12 V / 1 A |
| IC revision | 1 |
Description
The MCP1665 device is a compact, high-efficiency, fixed-frequency, non-synchronous step-up DC-DC converter that integrates a 36V, 100 mΩ NMOS switch. It provides a space-efficient high-voltage step-up power supply solution for applications powered by either three-cell alkaline, Ultimate Lithium, NiCd, NiMH, one-cell Li-Ion or Li-Polymer batteries. The integrated switch is protected by the typical 3.6A cycle-by-cycle inductor peak current limit operation. There is an output overvoltage protection and an open-load protection that turn off switching if the feedback resistors are accidentally disconnected, the feedback pin is short-circuited to GND or the output is exposed to excessive voltage. Pulse-Frequency Modulation (PFM) switching mode used for power saving is implemented, and it is selectable by the dedicated MODE pin.
Features
- 36V, 100 mΩ Integrated Switch
- Up to 92% Efficiency
- Higher Current Compared to the Previous MCP166x Switchers Family
- Output Voltage Range: Up to 32V
- 3.6A Typical Peak Input Current Limit:
- IOUT > 1 A at 5.0V VIN, 12V VOUT
- IOUT > 700 mA at 3.3V VIN, 12V VOUT
- IOUT > 400 mA at 4.2V VIN, 24V VOUT
- Input Voltage Range: 2.9V to 5V
- Input Undervoltage Lockout (UVLO):
- UVLO at VIN Rising: 2.9V, typical
- UVLO at VIN Falling: 2.7V, typical
- No Load Input Current: 250 μA Typically for PFM, 500 μA Typically for PWM
- Shutdown Mode with 0.4 μA Typical Quiescent Current
- Automatically PFM/PWM or Selected by the MODE Pin, for High Efficiency
- 500 kHz PWM Operation with Skipping Mode Operation Selectable by Dedicated MODE Pin
- Feedback Voltage Reference: VFB = 1.2V
- Cycle-by-Cycle Current Limiting
- Internal Compensation
- Inrush Current Limiting and Internal Soft Start
- Output Overvoltage Protection (OVP) and Open-Load Protection (OLP) for Constant Current Configuration
- Thermal Shutdown
- Easily Configurable for SEPIC, Cuk or Flyback Topologies
- Available Package: 10-Lead 2x2 mm VQFN
Typical applications
- Single-cell Li-on to 5V, 12V or 24V converters / LCD bias supply for portable applications / Battery-powered LEDs
- Three-cell Alkaline, lithium and NiMH/NiCd protable products
- Camera phone flash / Flashlight / Lighting applications
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT(A) | RDC max.(mΩ) | fres(MHz) | Size | Version | ISAT,10%(A) | ISAT,30%(A) | Material | LR(µH) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-PD SMT Power Inductor, 4.7 µH, 3.65 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance4.7 µH | Performance Rated Current3.65 A | Saturation Current4.2 A | DC Resistance60 mΩ | Self Resonant Frequency45 MHz | Size7332 | VersionStandard | Saturation Current @ 10%4.2 A | Saturation Current @ 30%5.3 A | – | – | ||||
 | WE-PD SMT Power Inductor, 4.7 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance4.7 µH | – | Saturation Current8 A | DC Resistance12.4 mΩ | Self Resonant Frequency34 MHz | Size1050 | VersionPerformance | – | – | – | – | ||||
 | WE-HCC SMT High Current Cube Inductor, 4.7 µH, 8.9 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCC SMT High Current Cube Inductor | Inductance4.7 µH | Performance Rated Current8.9 A | – | DC Resistance13.5 mΩ | Self Resonant Frequency45 MHz | Size8070 | VersionSMT | Saturation Current @ 10%7.7 A | Saturation Current @ 30%9.5 A | MaterialFerrite | Rated Inductance3.5 µH |