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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 NCP3123 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 NCP3123 provides dual 3.0 A switching regulators with an adjustable 200 kHz −2200 kHz switching frequency. The switching frequency is set by an external resistor. The NCP3123 also incorporates an auto−tracking and sequencing feature. Protection features include cycle−by−cycle current limit and undervoltage lockout (UVLO). The NCP3123 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 = 85% Efficiency Min @ 3.0 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
- Set−Top Boxes
- Portable Applications
- DSP/P/FPGA Core
- Networking and Telecommunications
More information
Products
Order Code | Datasheet | Downloads | Status | Product series | L(µH) | IR(A) | ISAT(A) | RDC max.(Ω) | fres(MHz) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-PD4 SMT Power Inductor, 5.6 µH, 4 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD4 SMT Power Inductor | Inductance5.6 µH | Rated Current4 A | Saturation Current6 A | DC Resistance0.032 Ω | Self Resonant Frequency31 MHz | MountSMT | |||
| WE-PD4 SMT Power Inductor, 6.8 µH, 3.8 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD4 SMT Power Inductor | Inductance6.8 µH | Rated Current3.8 A | Saturation Current5.1 A | DC Resistance0.034 Ω | Self Resonant Frequency30 MHz | MountSMT | |||
 | WE-PD3 SMT Power Inductor, 10 µH, 3.9 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD3 SMT Power Inductor | Inductance10 µH | Rated Current3.9 A | Saturation Current8 A | DC Resistance0.04 Ω | Self Resonant Frequency20 MHz | – | |||
| WE-PD4 SMT Power Inductor, 10 µH, 3.3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD4 SMT Power Inductor | Inductance10 µH | Rated Current3.3 A | Saturation Current5 A | DC Resistance0.045 Ω | Self Resonant Frequency23 MHz | MountSMT | |||
| WE-PD3 SMT Power Inductor, 15 µH, 3.5 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD3 SMT Power Inductor | Inductance15 µH | Rated Current3.5 A | Saturation Current7 A | DC Resistance0.048 Ω | Self Resonant Frequency16.5 MHz | – | |||
| WE-PD4 SMT Power Inductor, 15 µH, 4 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD4 SMT Power Inductor | Inductance15 µH | Rated Current4 A | Saturation Current8 A | DC Resistance0.036 Ω | Self Resonant Frequency15 MHz | MountSMT | |||
| WE-PD4 SMT Power Inductor, 22 µH, 3.5 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD4 SMT Power Inductor | Inductance22 µH | Rated Current3.5 A | Saturation Current7 A | DC Resistance0.047 Ω | Self Resonant Frequency13 MHz | MountSMT | |||
| WE-PD4 SMT Power Inductor, 33 µH, 3 A | 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 |