NCP3123: Non-Synchronous Buck Regulator, Dual, PWM, 3.0 A (200-2200 kHz)

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NCP3123: Non-Synchronous Buck Regulator, Dual, PWM, 3.0 A (200-2200 kHz)

The NCP3123 is a dual non-synchronous Pulse Width Modulation (PWM) buck regulator 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 2.0 A switching regulators with an adjustable 200 kHz - 2200 kHz switching frequency. 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. Also available in lower current version NCP3122 dual 2A and lower frequency version NCP3120 (dual 2A) and NCP3121 (dual 3A).

应用功能框图

NCP3123 应用功能框图

特性

Dual 3A / 3A Continuous Output Current
200-2200 KHz Adjustable Switching Frequency
0.8 V +/- 1.5% Reference voltage
Auto-Tracking & Sequencing
Enable / Disable
PowerGood Output
180° out-of-phase operation

优势

Highly integrated power solution for two output voltages
Optimization of efficiency and size. High frequency operation allows the use of chip inductors and ceramic output capacitors.
Good system level accuracy across temperature
Built in power management for power-up and power-down (Sequential, Ratiometric, Tracking)
Ability to turn off each channel into a low power state
Output flag that indicates when the output voltage is within 90% of the regulation target
Reduction of input capacitance requirement

应用

DSP/uP/FPGA power supplies Point of Load

终端产品

LCD-TV Logic Board Set-Top-Box (STB) xDSL and Cable Modem

设计和开发工具 (1)

Document Title	Document ID/Size	Revision	Revision Date
NCP312x Design Worksheet	NCP312X DWS.XLS (272.0kB)	3

数据表 (1)

Document Title	Document ID/Size	Revision	Revision Date
Dual 3.0 A Non-Synchronous PWM Buck Regulator	NCP3123/D (2415.0kB)	2

应用注释 (1)

Document Title	Document ID/Size	Revision	Revision Date
Compact, Dual 2 A Reference Design with the NCP3120	AND8323/D (973.0kB)	1

评估板文档 (4)

Document Title	Document ID/Size	Revision
NCP3123QPBCKGEVB Bill of Materials ROHS Compliant	NCP3123QPBCKGEVB_BOM_ROHS.PDF (232.0kB)	A
NCP3123QPBCKGEVB Gerber Layout Files (Zip Format)	NCP3123QPBCKGEVB_GERBER.ZIP (91.0kB)	0
NCP3123QPBCKGEVB Schematic	NCP3123QPBCKGEVB_SCHEMATIC.PDF (286.0kB)	0
NCP3123QPBCKGEVB Test Procedure	NCP3123QPBCKGEVB_TEST_PROCEDURE.PDF (677.0kB)	0