NCP3121: Non-Synchronous Buck Regulator, Dual, PWM, 3.0 A (200-750 kHz)

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NCP3121: Non-Synchronous Buck Regulator, Dual, PWM, 3.0 A (200-750 kHz)

The NCP3121 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 NCP3120 provides dual 3.0 A switching regulators with an adjustable 200 kHz - 750 kHz switching frequency. Switching frequency is set by an external resistor. The NCP3121 also incorporates an auto-tracking and sequencing feature. Protection features include cycle-by-cycle current limit and undervoltage lockout (UVLO). The NCP3121 comes in a 32-pin QFN package. Also available in lower current version NCP3120 dual 2A and higher frequency version NCP3122 (dual 2A) and NCP3123 (dual 3A).

应用功能框图

NCP3121 应用功能框图

特性

Dual 3A / 3A Continuous Output Current
200-750 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
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 xDSL and Cable Modem Set-Top-Box STB

数据表 (1)

Document Title	Document ID/Size	Revision	Revision Date
Dual 3.0 A Non-Synchronous PWM Buck Regulator	NCP3121/D (2426.0kB)	2

软件 (1)

Document Title	Document ID/Size	Revision	Revision Date
CompCalc : Circuit simulation and design software tool for DC-DC power design	COMPCALC (1619.0kB)	3

封装图纸 (1)

Document Title	Document ID/Size	Revision
QFN32, 5x5, 0.5P, 3.1x3.1EP	488AM (57.4kB)	A

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
NCP3121QPBCKGEVB Bill of Materials (Rohs Compliant)	NCP3121QPBCKGEVB_BOM_ROHS.PDF (228.0kB)	A
NCP3121QPBCKGEVB Gerber Layout Files	NCP3121QPBCKGEVB_GERBERS.ZIP (89.0kB)	0
NCP3121QPBCKGEVB Schematic	NCP3121QPBCKGEVB_SCHEMATIC.PDF (39.0kB)	0
NCP3121QPBCKGEVB Test Procedure	NCP3121QPBCKGEVB_TEST_PROCEDURE.PDF (1514.0kB)	0