CXSD6280两个同步降压型脉宽调制控制器高精度内部参考电压的线性控制器PWM控制器同步buck拓扑中的两个N沟道mosfet

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发表时间：2020-04-21浏览次数：53

CXSD6280两个同步降压型脉宽调制控制器高精度内部参考电压的线性控制器PWM控制器同步buck拓扑中的两个N沟道mosfet

目录3Qd嘉泰姆

1.产品概述         2.产品特点3Qd嘉泰姆
3.应用范围       4.下载产品资料PDF文档 3Qd嘉泰姆
5.产品封装图                     6.电路原理图             3Qd嘉泰姆
7.功能概述       8.相关产品3Qd嘉泰姆

一,产品概述(General Description) 3Qd嘉泰姆

The CXSD6280 has two synchronous buck PWM control-lers3Qd嘉泰姆
and one linear controller with high precision internal references voltage3Qd嘉泰姆
to offer accurate outputs. The PWM controllers are designed to drive3Qd嘉泰姆
two N-channel MOSFETs in synchronous buck topology, and the linear3Qd嘉泰姆
controller drives an external N-channel MOSFET. The device re-quires3Qd嘉泰姆
12V and 5V power supplies, if the 5V supply is not available, VCC12 can3Qd嘉泰姆
offer an optional shunt regulator 5.8V for 5V supply.All outputs have3Qd嘉泰姆
independent soft-start and enable func-tions by SS/EN pins to control.3Qd嘉泰姆
Connect a capacitor from each SS/EN pin to the ground for setting the3Qd嘉泰姆
soft-start time, and pulling the SS/EN pin below 1V to disable regulator.3Qd嘉泰姆
Pull the SS2/EN2 to VCC, enter the DDR mode,the SS1/EN1 controls3Qd嘉泰姆
both VOUT1 and VOUT2, and al-lows VOUT2 to track VOUT1. It also3Qd嘉泰姆
offers the phase shift function by REFOUT pin to select the phase shift3Qd嘉泰姆
between VOUT1 and VOUT2 in DDR mode or Independent mode.3Qd嘉泰姆
When all SS/EN pins exceed 3.3V and no faults are detected, the PGOOD3Qd嘉泰姆
pin goes high to indicate the regu-lators are ready. If any of the SS/EN pins3Qd嘉泰姆
goes below 3.2V or any of the outputs has a fault condition, the PGOOD pin3Qd嘉泰姆
will be pulled low.3Qd嘉泰姆
The internal oscillator is nominally 300kHz (keep the FS/SYNC pin open3Qd嘉泰姆
or short to GND), and it offers the pro-grammable frequency function from3Qd嘉泰姆
70kHz to 800kHz; con-necting a resistor from FS/SYNC to VCC12 to decrease3Qd嘉泰姆
the frequency, conversely, connect a resistor from FS/SYNC to GND to3Qd嘉泰姆
increase the frequency.The IC also pro-vides the synchronous frequency3Qd嘉泰姆
function. Connect the LGATE signal of another converter to FS/SYNC pin;3Qd嘉泰姆
forc-ing the switching frequency to follow the external clock.
The possible synchronous frequency is from 150kHz to 800kHz. There3Qd嘉泰姆
is no Rds(on) sensing or under-voltage sens-ing on CXSD6280. However, it3Qd嘉泰姆
provides a simple short-circuit protection by monitoring the COMP1 and COMP23Qd嘉泰姆
for over-voltage. When any of two pins exceeds their trip point and the condition3Qd嘉泰姆
persists for 1-2 internal clock cycle (3-6μs at 300kHz), then it will shut down3Qd嘉泰姆
all regulators.3Qd嘉泰姆
二.产品特点(Features)3Qd嘉泰姆

1.)Two Synchronous Buck Converters and A Linear Regulator3Qd嘉泰姆
2.)VIN Range up to 12V3Qd嘉泰姆
3.)Input Power Supplies Require 12V and 5V or3Qd嘉泰姆
4.)Use 12V to Generate a Shunt Regulator 5.8V3Qd嘉泰姆
5.)0.6V Reference for VOUT1 and VOUT3 with 0.8% Accurate3Qd嘉泰姆
6.)3.3V Reference for VOUT2 with 0.8% Accurate3Qd嘉泰姆
7.)Buffered VTT Reference Output3Qd嘉泰姆
8.)Three Outputs have Independent Soft-Start and Enable3Qd嘉泰姆
9.)Internal 300kHz Oscillator and Programmable3Qd嘉泰姆
10.)Frequency Range from 70 kHz to 800kHz3Qd嘉泰姆
11.)Synchronous Switching Frequency3Qd嘉泰姆
12.)DDR Mode or Independent Mode Selection3Qd嘉泰姆
13.)Phase Shift Selection3Qd嘉泰姆
14.)Power Good Function3Qd嘉泰姆

15.)Short-Circuit Protection for VOUT1 and VOUT23Qd嘉泰姆
16.)Thermally Enhanced TSSOP-24P and QFN5x5-32 Packages3Qd嘉泰姆
17.)Lead Free and Green Devices Available (RoHS Compliant) 3Qd嘉泰姆
三,应用范围 (Applications)3Qd嘉泰姆

Graphic Cards3Qd嘉泰姆
DDR memory Power Supplies3Qd嘉泰姆
Low-Voltage Distributed Power Supplies3Qd嘉泰姆
四.下载产品资料PDF文档 3Qd嘉泰姆

需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！3Qd嘉泰姆

QQ截图20160419174301.jpg 3Qd嘉泰姆

五,产品封装图 (Package)3Qd嘉泰姆

3Qd嘉泰姆
FUNCTIONNAMEFUNCTION3Qd嘉泰姆
These pins are the outputs of error amplifiers of their respective regulators. They are3Qd嘉泰姆
used to set the compensation components.3Qd嘉泰姆
These pins provide two functions. Connect a capacitor to the GND for setting the3Qd嘉泰姆
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable the3Qd嘉泰姆
respective output, leave open to enable the respective output.3Qd嘉泰姆
These pins provide two functions. Connect a capacitor to the GND for setting the3Qd嘉泰姆
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable the3Qd嘉泰姆
respective output, leave open to enable the respective output.3Qd嘉泰姆

PIN3Qd嘉泰姆			FUNCTION3Qd嘉泰姆
NO.3Qd嘉泰姆		NAME3Qd嘉泰姆
TSSOP-24P3Qd嘉泰姆	DFN5x5-323Qd嘉泰姆	NAME3Qd嘉泰姆

13Qd嘉泰姆	293Qd嘉泰姆	FB13Qd嘉泰姆	These pins are the inverting inputs of the error amplifiers of their respective regulators. They are used to set the output voltage and the compensation components.3Qd嘉泰姆
23Qd嘉泰姆	303Qd嘉泰姆	COMP13Qd嘉泰姆	These pins are the outputs of error amplifiers of their respective regulators. They are used to set the compensation components.3Qd嘉泰姆
33Qd嘉泰姆	313Qd嘉泰姆	COMP23Qd嘉泰姆
43Qd嘉泰姆	323Qd嘉泰姆	FB23Qd嘉泰姆	These pins are the inverting inputs of the error amplifiers of their respective regulators. They are used to set the output voltage and the compensation components.3Qd嘉泰姆
53Qd嘉泰姆	13Qd嘉泰姆	REFIN3Qd嘉泰姆	This pin is the reference input voltage of error amplifier of the VOUT2. It also provides the voltage into a buffer, which is out on the REFOUT pin.3Qd嘉泰姆
63Qd嘉泰姆	33Qd嘉泰姆	REFOUT3Qd嘉泰姆	This pin provides a buffed voltage, which is from REFIN pin. In Independent mode, it can be used by other ICs. In DDR mode, it is from the VOUT1, and can be used as the VTT buffer. This pin also uses to select the phase shift (see table1). When this pin3Qd嘉泰姆 pulls to VCC, the buffer is disabled and the REFOUT is not available for use. It is recommended that a 0.1μF capacitor is connected to the ground for stability.3Qd嘉泰姆
73Qd嘉泰姆	43Qd嘉泰姆	SS1/EN13Qd嘉泰姆	These pins provide two functions. Connect a capacitor to the GND for setting the soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable the respective output, leave open to enable the respective output.3Qd嘉泰姆
83Qd嘉泰姆	53Qd嘉泰姆	SS2/EN23Qd嘉泰姆
93Qd嘉泰姆	63Qd嘉泰姆	SS3/EN33Qd嘉泰姆
103Qd嘉泰姆	73Qd嘉泰姆	VREF3Qd嘉泰姆	This pin provides a 3.3V reference voltage, which can be used by the REFIN pin or other ICs as a voltage reference. It is recommended that a 1μF capacitor is connected to ground for stability3Qd嘉泰姆
113Qd嘉泰姆	83Qd嘉泰姆	DRIVE33Qd嘉泰姆	This pin drives the gate of an external N-channel MOSFET for linear regulator.3Qd嘉泰姆
123Qd嘉泰姆	103Qd嘉泰姆	FB33Qd嘉泰姆	These pins are the inverting inputs of the error amplifiers of their respective regulators. They are used to set the output voltage and the compensation components.3Qd嘉泰姆
133Qd嘉泰姆	113Qd嘉泰姆	FS/SYNC3Qd嘉泰姆	This pin is used to adjust the switching frequency. Connecting a resistor from FS/SYNC pin to the ground increases the switching frequency. Conversely,connecting a resistor from this pin to the VCC12 reduces the switching frequency. In addition, this pin also provides synchronous frequency function. An external clock can be fed into this pin, and force the switching frequency to follow the external clock.3Qd嘉泰姆
143Qd嘉泰姆	123Qd嘉泰姆	PGOOD3Qd嘉泰姆	This pin is an open drain device; connect a pull up resistor to the VCC for PGOOD function.3Qd嘉泰姆
153Qd嘉泰姆	133Qd嘉泰姆	GND3Qd嘉泰姆	This pin is the signal ground pin. The metal thermal pad under the package is the IC substrate; connects the GND pin and metal thermal pad together on the board, and ties to the good GND plane for electrical and thermal conduction.3Qd嘉泰姆
163Qd嘉泰姆	163Qd嘉泰姆	BOOT23Qd嘉泰姆	These pins provide the bootstrap voltage to the gate driver for driving the upper MOSFETs. It can be connected to a power voltage directly, but the difference voltage between the BOOT and VIN must be high enough to drive the upper MOSFETs.3Qd嘉泰姆
173Qd嘉泰姆	143Qd嘉泰姆	UGATE23Qd嘉泰姆	These pins provide the gate driver for the upper MOSFETs of VOUT1 and VOUT2.3Qd嘉泰姆
183Qd嘉泰姆	18,233Qd嘉泰姆	PGND3Qd嘉泰姆	This pin is the power ground pin for the gate driver and linear driver circuit. It should be tied to the GND.3Qd嘉泰姆
193Qd嘉泰姆	203Qd嘉泰姆	LGATE23Qd嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.3Qd嘉泰姆
203Qd嘉泰姆	213Qd嘉泰姆	LGATE13Qd嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.3Qd嘉泰姆
213Qd嘉泰姆	19, 223Qd嘉泰姆	VCC123Qd嘉泰姆	Power supply input pin. Connect a nominal 12V power supply to this pin for the gate driver. It is recommended that a decoupling capacitor (1 to 10μF) is connected to the GND for noise decoupling.3Qd嘉泰姆

六.电路原理图3Qd嘉泰姆

3Qd嘉泰姆

七,功能概述3Qd嘉泰姆

Soft-Start/Enable3Qd嘉泰姆
The three SS/EN pins control the soft-start and enable or disable the controller. In Independent mode, the three3Qd嘉泰姆
regulators all have independent soft-start and enable functions. Connect a soft-start capacitor from each SS/EN3Qd嘉泰姆
pin to the GND to set the soft-start interval, and an open drain logic signal for each SS/EN pin will enable or dis-3Qd嘉泰姆
able the respective output.3Qd嘉泰姆

八,相关产品 更多同类产品...... 3Qd嘉泰姆

Switching Regulator > Buck Controller3Qd嘉泰姆
Part_No 3Qd嘉泰姆	Package 3Qd嘉泰姆	Archi3Qd嘉泰姆 tectu3Qd嘉泰姆	Phase3Qd嘉泰姆	No.of3Qd嘉泰姆 PWM3Qd嘉泰姆 Output3Qd嘉泰姆	Output 3Qd嘉泰姆 Current3Qd嘉泰姆 (A) 3Qd嘉泰姆	Input3Qd嘉泰姆 Voltage (V) 3Qd嘉泰姆		Reference3Qd嘉泰姆 Voltage3Qd嘉泰姆 (V) 3Qd嘉泰姆	Bias 3Qd嘉泰姆 Voltage3Qd嘉泰姆 (V) 3Qd嘉泰姆	Quiescent3Qd嘉泰姆 Current3Qd嘉泰姆 (uA) 3Qd嘉泰姆
Part_No 3Qd嘉泰姆	Package 3Qd嘉泰姆	Archi3Qd嘉泰姆 tectu3Qd嘉泰姆	Phase3Qd嘉泰姆	No.of3Qd嘉泰姆 PWM3Qd嘉泰姆 Output3Qd嘉泰姆	Output 3Qd嘉泰姆 Current3Qd嘉泰姆 (A) 3Qd嘉泰姆	min3Qd嘉泰姆	max3Qd嘉泰姆	Reference3Qd嘉泰姆 Voltage3Qd嘉泰姆 (V) 3Qd嘉泰姆	Bias 3Qd嘉泰姆 Voltage3Qd嘉泰姆 (V) 3Qd嘉泰姆	Quiescent3Qd嘉泰姆 Current3Qd嘉泰姆 (uA) 3Qd嘉泰姆
CXSD62733Qd嘉泰姆	SOP-143Qd嘉泰姆 QSOP-163Qd嘉泰姆 QFN4x4-163Qd嘉泰姆	VM 3Qd嘉泰姆	1 3Qd嘉泰姆	1 3Qd嘉泰姆	303Qd嘉泰姆	2.9 3Qd嘉泰姆	13.23Qd嘉泰姆	0.93Qd嘉泰姆	12 3Qd嘉泰姆	80003Qd嘉泰姆
CXSD62743Qd嘉泰姆	SOP-83Qd嘉泰姆	VM 3Qd嘉泰姆	13Qd嘉泰姆	13Qd嘉泰姆	203Qd嘉泰姆	2.9 3Qd嘉泰姆	13.2 3Qd嘉泰姆	0.83Qd嘉泰姆	123Qd嘉泰姆	50003Qd嘉泰姆
CXSD6274C3Qd嘉泰姆	SOP-83Qd嘉泰姆	VM3Qd嘉泰姆	13Qd嘉泰姆	13Qd嘉泰姆	203Qd嘉泰姆	2.93Qd嘉泰姆	13.23Qd嘉泰姆	0.83Qd嘉泰姆	123Qd嘉泰姆	50003Qd嘉泰姆
CXSD62753Qd嘉泰姆	QFN4x4-243Qd嘉泰姆	VM3Qd嘉泰姆	23Qd嘉泰姆	13Qd嘉泰姆	603Qd嘉泰姆	3.13Qd嘉泰姆	13.23Qd嘉泰姆	0.63Qd嘉泰姆	123Qd嘉泰姆	50003Qd嘉泰姆
CXSD62763Qd嘉泰姆	SOP-83Qd嘉泰姆	VM3Qd嘉泰姆	13Qd嘉泰姆	13Qd嘉泰姆	203Qd嘉泰姆	2.23Qd嘉泰姆	13.23Qd嘉泰姆	0.83Qd嘉泰姆	5~123Qd嘉泰姆	21003Qd嘉泰姆
CXSD6276A3Qd嘉泰姆	SOP-83Qd嘉泰姆	VM3Qd嘉泰姆	13Qd嘉泰姆	13Qd嘉泰姆	203Qd嘉泰姆	2.23Qd嘉泰姆	13.23Qd嘉泰姆	0.83Qd嘉泰姆	5~123Qd嘉泰姆	21003Qd嘉泰姆
CXSD6277/A/B3Qd嘉泰姆	SOP8\|TSSOP83Qd嘉泰姆	VM3Qd嘉泰姆	13Qd嘉泰姆	13Qd嘉泰姆	53Qd嘉泰姆	53Qd嘉泰姆	13.23Qd嘉泰姆	1.25\|0.83Qd嘉泰姆	5~123Qd嘉泰姆	30003Qd嘉泰姆
CXSD62783Qd嘉泰姆	SOP-83Qd嘉泰姆	VM3Qd嘉泰姆	13Qd嘉泰姆	13Qd嘉泰姆	103Qd嘉泰姆	3.33Qd嘉泰姆	5.53Qd嘉泰姆	0.83Qd嘉泰姆	53Qd嘉泰姆	21003Qd嘉泰姆
CXSD6279B3Qd嘉泰姆	SOP-143Qd嘉泰姆	VM 3Qd嘉泰姆	13Qd嘉泰姆	13Qd嘉泰姆	103Qd嘉泰姆	53Qd嘉泰姆	13.23Qd嘉泰姆	0.83Qd嘉泰姆	123Qd嘉泰姆	20003Qd嘉泰姆
CXSD62803Qd嘉泰姆	TSSOP-243Qd嘉泰姆 \|QFN5x5-323Qd嘉泰姆	VM3Qd嘉泰姆	13Qd嘉泰姆	23Qd嘉泰姆	203Qd嘉泰姆	53Qd嘉泰姆	13.23Qd嘉泰姆	0.63Qd嘉泰姆	5~123Qd嘉泰姆	40003Qd嘉泰姆
CXSD6281N3Qd嘉泰姆	SOP143Qd嘉泰姆 QSOP163Qd嘉泰姆 QFN-163Qd嘉泰姆	VM3Qd嘉泰姆	13Qd嘉泰姆	13Qd嘉泰姆	303Qd嘉泰姆	2.93Qd嘉泰姆	13.23Qd嘉泰姆	0.93Qd嘉泰姆	123Qd嘉泰姆	40003Qd嘉泰姆
CXSD62823Qd嘉泰姆	SOP-143Qd嘉泰姆	VM3Qd嘉泰姆	13Qd嘉泰姆

上一篇：CXSD6279B电压模式和同步PWM控制器驱动双N通道mosfet控制监视和保护功能受控电源带欠压和过流保护的输出

下一篇：CXSD6281N同步Buck-PWM和线性控制器同步Buck-PWM和线性控制器以及监控和保护功带欠压保护的外部N沟道MOSFET

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