Renesas ICL7660SIBAZT Monolithic CMOS Super Voltage Converters
Shenzhen Mingjiada Electronics Co., Ltd., as a renowned supplier of electronic components, now offers Renesas' ICL7660SIBAZT monolithic CMOS overvoltage converter. This device, with its efficient voltage conversion capability and compact design, serves as an ideal choice for power management solutions in various electronic equipment.
The ICL7660SIBAZT is a high-performance charge pump voltage converter manufactured by Renesas Electronics, forming part of the ICL7660 series. Fabricated using CMOS technology, this device converts positive voltages into corresponding negative voltages or performs voltage multiplication, delivering flexible power supply solutions for diverse electronic circuits.
Essentially a DC/DC charge pump adjustable regulator, the ICL7660SIBAZT chip converts input voltages ranging from 1.5V to 12V into corresponding negative voltage outputs (-12V to -1.5V), delivering a maximum output current of 45mA.
The ICL7660SIBAZT offers a broader operating voltage range and lower supply current requirements. It requires only two external capacitors for operation, significantly simplifying system design.
The ICL7660SIBAZT is housed in an SOIC-8 package, suitable for surface mount technology (SMT) processes, facilitating integration into various modern electronic devices.
Wide input voltage range: 1.5V to 12V, compatible with multiple power supply systems.
High Output Current: Delivers up to 45mA output current, meeting most low-power application requirements.
High Conversion Efficiency: Achieves typical open-circuit voltage conversion efficiency of 99.9% and power supply efficiency of 98%, effectively reducing energy loss.
Flexible Output Configuration: Capable of providing positive or negative output configurations, supporting -Vin (negative input voltage) or 2Vin (double input voltage) outputs.
Minimal external components: Requires only two external capacitors (charge pump capacitor and reservoir capacitor) for operation, simplifying circuit design.
Wide operating temperature range: -40°C to 85°C, suitable for diverse environmental conditions.
Switching frequency: 10kHz to 35kHz.
The ICL7660SIBAZT operates on the charge pump principle, incorporating an internal RC oscillator, voltage level shifter, and four power MOS switches. It can convert a positive input voltage to a negative output voltage (e.g., +5V input to -5V output) or achieve voltage multiplication through appropriate connections (e.g., generating twice the input voltage).
The ICL7660SIBAZT further incorporates unique logic circuitry to detect the device's most negative voltage and ensure the source-substrate junction of the output N-channel switch remains non-forward-biased. This prevents latch-up effects and guarantees operational stability.
The LV pin permits users to bypass the internal linear regulator by grounding it, thereby enhancing performance in low-voltage (LV) applications. Within the medium-to-high voltage range (+3.5V to +12.0V), the LV pin should remain floating to prevent device latch-up.
The ICL7660SIBAZT operates within a temperature range of -40°C to 85°C, making it suitable for industrial environment applications. Its switching frequency ranges from 10kHz to 35kHz, with the operating frequency adjustable via external components.
The ICL7660SIBAZT exhibits an exceptionally low quiescent current (typically 80μA), contributing to reduced overall system power consumption. This characteristic is particularly significant for battery-powered portable devices.
The ICL7660SIBAZT delivers exceptionally high voltage conversion efficiency, guaranteeing a minimum power efficiency of 96%. Its enhanced minimum open-circuit voltage conversion efficiency reaches 99%. This translates to minimal energy loss, contributing to improved overall system energy efficiency.
Negative power supply for dynamic RAM: Provides the required negative bias voltage for memory.
Microprocessor negative supply: Delivers negative power to microprocessors such as the 8080.
Low-cost negative supply generation: For applications requiring negative power where space and cost constraints apply.
Data acquisition systems: Supplies negative power to operational amplifiers, sensor interfaces, or other analogue circuits necessitating dual power sources.
Portable devices: Applications within battery-powered equipment requiring voltage conversion or multiplication.
The ICL7660SIBAZT finds extensive application across diverse electronic equipment: within data acquisition systems, it supplies the requisite negative power supply for operational amplifiers and ADC/DAC converters. In RS232 communication interfaces, it facilitates the generation of required negative voltages.
In portable devices such as handheld instruments, PDAs, and handheld computers, it generates dual power supplies from a single battery. Within power distribution systems, it serves as a critical component supplying both positive and negative voltages. In LCD backlight driver circuits, it provides the required negative bias voltage.
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