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Overview
| Topology | Buck Converter |
| Input voltage | 4.5-13.2 V |
| Switching frequency | 200-2200 kHz |
| Output 1 | 0.8 V / 3 A |
| IC revision | 2 |
Description
The NCP3122 is a dual buck converter designed for low voltage applications requiring high efficiency. This device is capable of producing an output voltage as low as 0.8 V. The NCP3122 provides dual 2.0 A switching regulators with an adjustable 200 kHz − 2200kHz switching frequency. The switching frequency is set by an external resistor. The NCP3122 also incorporates an auto−tracking and sequencing feature. Protection features include cycle−by−cycle current limit and undervoltage lockout (UVLO). The NCP3122 comes in a 32−pin QFN package.
Features
- Input Voltage Range from 4.5 V to 13.2 V
- 12 Vin to 5.0 Vout = 87% Efficiency Min @ 2.0 A
- 200−2200 kHz Operation
- Stable with Low ESR Ceramic Output Capacitor
- 0.8 ±1.5% FB Reference Voltage
- External Soft−Start
- Out of Phase Operation of OUT1 & OUT2
- Auto−Tracking and Sequencing
- Enable/Disable Capability
- Hiccup Overload Protection
- Low Shutdown Power (Iq < 100 µA)
Note:Ref page 15 table 1 for different inductor values with respect to Iout,vin/vout.
Typical applications
- DSP/P/FPGA Core
- Portable Applications,
- Set−Top Boxes,
- Networking and Telecommunications
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT(A) | RDC max.(Ω) | fres(MHz) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-PD3 SMT Power Inductor, 2.2 µH, 2.76 A | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD3 SMT Power Inductor | Inductance2.2 µH | Rated Current2.76 A | Saturation Current6 A | DC Resistance0.045 Ω | Self Resonant Frequency70 MHz | – | |||
| WE-PD3 SMT Power Inductor, 2.2 µH, 3.8 A | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD3 SMT Power Inductor | Inductance2.2 µH | Rated Current3.8 A | Saturation Current6.8 A | DC Resistance0.027 Ω | Self Resonant Frequency85 MHz | – | |||
| WE-PD3 SMT Power Inductor, 3 µH, 2.9 A | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD3 SMT Power Inductor | Inductance3 µH | Rated Current2.9 A | Saturation Current5.9 A | DC Resistance0.03 Ω | Self Resonant Frequency70 MHz | – | |||
| WE-PD3 SMT Power Inductor, 3.3 µH, 2.2 A | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD3 SMT Power Inductor | Inductance3.3 µH | Rated Current2.2 A | Saturation Current5.4 A | DC Resistance0.062 Ω | Self Resonant Frequency50 MHz | – | |||
| WE-PD3 SMT Power Inductor, 4.7 µH, 2.7 A | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD3 SMT Power Inductor | Inductance4.7 µH | Rated Current2.7 A | Saturation Current4.7 A | DC Resistance0.04 Ω | Self Resonant Frequency48 MHz | – | |||
 | WE-PD2 SMT Power Inductor, 6.8 µH, 2.4 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD2 SMT Power Inductor | Inductance6.8 µH | Rated Current2.4 A | Saturation Current5 A | DC Resistance0.082 Ω | Self Resonant Frequency28 MHz | MountSMT | ||||
| WE-PD3 SMT Power Inductor, 7 µH, 2.2 A | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD3 SMT Power Inductor | Inductance7 µH | Rated Current2.2 A | Saturation Current4.1 A | DC Resistance0.055 Ω | Self Resonant Frequency33 MHz | – | |||
| WE-PD2 SMT Power Inductor, 10 µH, 2.3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD2 SMT Power Inductor | Inductance10 µH | Rated Current2.3 A | Saturation Current2.95 A | DC Resistance0.07 Ω | Self Resonant Frequency28 MHz | MountSMT | ||||
 | WE-PD4 SMT Power Inductor, 15 µH, 2.9 A | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD4 SMT Power Inductor | Inductance15 µH | Rated Current2.9 A | Saturation Current3.6 A | DC Resistance0.06 Ω | Self Resonant Frequency17 MHz | MountSMT | |||
| WE-PD4 SMT Power Inductor, 22 µH, 2.6 A | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD4 SMT Power Inductor | Inductance22 µH | Rated Current2.6 A | Saturation Current3.1 A | DC Resistance0.095 Ω | Self Resonant Frequency14 MHz | MountSMT | |||
| WE-PD4 SMT Power Inductor, 33 µH, 3 A | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD4 SMT Power Inductor | Inductance33 µH | Rated Current3 A | Saturation Current5.5 A | DC Resistance0.066 Ω | Self Resonant Frequency10 MHz | MountSMT |