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：126

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6nn嘉泰姆

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

一,产品概述(General Description) 6nn嘉泰姆

The CXSD6280 has two synchronous buck PWM control-lers6nn嘉泰姆
and one linear controller with high precision internal references voltage6nn嘉泰姆
to offer accurate outputs. The PWM controllers are designed to drive6nn嘉泰姆
two N-channel MOSFETs in synchronous buck topology, and the linear6nn嘉泰姆
controller drives an external N-channel MOSFET. The device re-quires6nn嘉泰姆
12V and 5V power supplies, if the 5V supply is not available, VCC12 can6nn嘉泰姆
offer an optional shunt regulator 5.8V for 5V supply.All outputs have6nn嘉泰姆
independent soft-start and enable func-tions by SS/EN pins to control.6nn嘉泰姆
Connect a capacitor from each SS/EN pin to the ground for setting the6nn嘉泰姆
soft-start time, and pulling the SS/EN pin below 1V to disable regulator.6nn嘉泰姆
Pull the SS2/EN2 to VCC, enter the DDR mode,the SS1/EN1 controls6nn嘉泰姆
both VOUT1 and VOUT2, and al-lows VOUT2 to track VOUT1. It also6nn嘉泰姆
offers the phase shift function by REFOUT pin to select the phase shift6nn嘉泰姆
between VOUT1 and VOUT2 in DDR mode or Independent mode.6nn嘉泰姆
When all SS/EN pins exceed 3.3V and no faults are detected, the PGOOD6nn嘉泰姆
pin goes high to indicate the regu-lators are ready. If any of the SS/EN pins6nn嘉泰姆
goes below 3.2V or any of the outputs has a fault condition, the PGOOD pin6nn嘉泰姆
will be pulled low.6nn嘉泰姆
The internal oscillator is nominally 300kHz (keep the FS/SYNC pin open6nn嘉泰姆
or short to GND), and it offers the pro-grammable frequency function from6nn嘉泰姆
70kHz to 800kHz; con-necting a resistor from FS/SYNC to VCC12 to decrease6nn嘉泰姆
the frequency, conversely, connect a resistor from FS/SYNC to GND to6nn嘉泰姆
increase the frequency.The IC also pro-vides the synchronous frequency6nn嘉泰姆
function. Connect the LGATE signal of another converter to FS/SYNC pin;6nn嘉泰姆
forc-ing the switching frequency to follow the external clock.
The possible synchronous frequency is from 150kHz to 800kHz. There6nn嘉泰姆
is no Rds(on) sensing or under-voltage sens-ing on CXSD6280. However, it6nn嘉泰姆
provides a simple short-circuit protection by monitoring the COMP1 and COMP26nn嘉泰姆
for over-voltage. When any of two pins exceeds their trip point and the condition6nn嘉泰姆
persists for 1-2 internal clock cycle (3-6μs at 300kHz), then it will shut down6nn嘉泰姆
all regulators.6nn嘉泰姆
二.产品特点(Features)6nn嘉泰姆

1.)Two Synchronous Buck Converters and A Linear Regulator6nn嘉泰姆
2.)VIN Range up to 12V6nn嘉泰姆
3.)Input Power Supplies Require 12V and 5V or6nn嘉泰姆
4.)Use 12V to Generate a Shunt Regulator 5.8V6nn嘉泰姆
5.)0.6V Reference for VOUT1 and VOUT3 with 0.8% Accurate6nn嘉泰姆
6.)3.3V Reference for VOUT2 with 0.8% Accurate6nn嘉泰姆
7.)Buffered VTT Reference Output6nn嘉泰姆
8.)Three Outputs have Independent Soft-Start and Enable6nn嘉泰姆
9.)Internal 300kHz Oscillator and Programmable6nn嘉泰姆
10.)Frequency Range from 70 kHz to 800kHz6nn嘉泰姆
11.)Synchronous Switching Frequency6nn嘉泰姆
12.)DDR Mode or Independent Mode Selection6nn嘉泰姆
13.)Phase Shift Selection6nn嘉泰姆
14.)Power Good Function6nn嘉泰姆

15.)Short-Circuit Protection for VOUT1 and VOUT26nn嘉泰姆
16.)Thermally Enhanced TSSOP-24P and QFN5x5-32 Packages6nn嘉泰姆
17.)Lead Free and Green Devices Available (RoHS Compliant) 6nn嘉泰姆
三,应用范围 (Applications)6nn嘉泰姆

Graphic Cards6nn嘉泰姆
DDR memory Power Supplies6nn嘉泰姆
Low-Voltage Distributed Power Supplies6nn嘉泰姆
四.下载产品资料PDF文档 6nn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！6nn嘉泰姆

QQ截图20160419174301.jpg 6nn嘉泰姆

五,产品封装图 (Package)6nn嘉泰姆

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FUNCTIONNAMEFUNCTION6nn嘉泰姆
These pins are the outputs of error amplifiers of their respective regulators. They are6nn嘉泰姆
used to set the compensation components.6nn嘉泰姆
These pins provide two functions. Connect a capacitor to the GND for setting the6nn嘉泰姆
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable the6nn嘉泰姆
respective output, leave open to enable the respective output.6nn嘉泰姆
These pins provide two functions. Connect a capacitor to the GND for setting the6nn嘉泰姆
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable the6nn嘉泰姆
respective output, leave open to enable the respective output.6nn嘉泰姆

PIN6nn嘉泰姆			FUNCTION6nn嘉泰姆
NO.6nn嘉泰姆		NAME6nn嘉泰姆
TSSOP-24P6nn嘉泰姆	DFN5x5-326nn嘉泰姆	NAME6nn嘉泰姆

16nn嘉泰姆	296nn嘉泰姆	FB16nn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.6nn嘉泰姆
26nn嘉泰姆	306nn嘉泰姆	COMP16nn嘉泰姆	These pins are the outputs of error amplifiers of their respective regulators. They are used to set the compensation components.6nn嘉泰姆
36nn嘉泰姆	316nn嘉泰姆	COMP26nn嘉泰姆
46nn嘉泰姆	326nn嘉泰姆	FB26nn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.6nn嘉泰姆
56nn嘉泰姆	16nn嘉泰姆	REFIN6nn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.6nn嘉泰姆
66nn嘉泰姆	36nn嘉泰姆	REFOUT6nn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 pin6nn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.6nn嘉泰姆
76nn嘉泰姆	46nn嘉泰姆	SS1/EN16nn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.6nn嘉泰姆
86nn嘉泰姆	56nn嘉泰姆	SS2/EN26nn嘉泰姆
96nn嘉泰姆	66nn嘉泰姆	SS3/EN36nn嘉泰姆
106nn嘉泰姆	76nn嘉泰姆	VREF6nn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 stability6nn嘉泰姆
116nn嘉泰姆	86nn嘉泰姆	DRIVE36nn嘉泰姆	This pin drives the gate of an external N-channel MOSFET for linear regulator.6nn嘉泰姆
126nn嘉泰姆	106nn嘉泰姆	FB36nn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.6nn嘉泰姆
136nn嘉泰姆	116nn嘉泰姆	FS/SYNC6nn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.6nn嘉泰姆
146nn嘉泰姆	126nn嘉泰姆	PGOOD6nn嘉泰姆	This pin is an open drain device; connect a pull up resistor to the VCC for PGOOD function.6nn嘉泰姆
156nn嘉泰姆	136nn嘉泰姆	GND6nn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.6nn嘉泰姆
166nn嘉泰姆	166nn嘉泰姆	BOOT26nn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.6nn嘉泰姆
176nn嘉泰姆	146nn嘉泰姆	UGATE26nn嘉泰姆	These pins provide the gate driver for the upper MOSFETs of VOUT1 and VOUT2.6nn嘉泰姆
186nn嘉泰姆	18,236nn嘉泰姆	PGND6nn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.6nn嘉泰姆
196nn嘉泰姆	206nn嘉泰姆	LGATE26nn嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.6nn嘉泰姆
206nn嘉泰姆	216nn嘉泰姆	LGATE16nn嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.6nn嘉泰姆
216nn嘉泰姆	19, 226nn嘉泰姆	VCC126nn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.6nn嘉泰姆

六.电路原理图6nn嘉泰姆

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七,功能概述6nn嘉泰姆

Soft-Start/Enable6nn嘉泰姆
The three SS/EN pins control the soft-start and enable or disable the controller. In Independent mode, the three6nn嘉泰姆
regulators all have independent soft-start and enable functions. Connect a soft-start capacitor from each SS/EN6nn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-6nn嘉泰姆
able the respective output.6nn嘉泰姆

八,相关产品 更多同类产品...... 6nn嘉泰姆

Switching Regulator > Buck Controller6nn嘉泰姆
Part_No 6nn嘉泰姆	Package 6nn嘉泰姆	Archi6nn嘉泰姆 tectu6nn嘉泰姆	Phase6nn嘉泰姆	No.of6nn嘉泰姆 PWM6nn嘉泰姆 Output6nn嘉泰姆	Output 6nn嘉泰姆 Current6nn嘉泰姆 (A) 6nn嘉泰姆	Input6nn嘉泰姆 Voltage (V) 6nn嘉泰姆		Reference6nn嘉泰姆 Voltage6nn嘉泰姆 (V) 6nn嘉泰姆	Bias 6nn嘉泰姆 Voltage6nn嘉泰姆 (V) 6nn嘉泰姆	Quiescent6nn嘉泰姆 Current6nn嘉泰姆 (uA) 6nn嘉泰姆
Part_No 6nn嘉泰姆	Package 6nn嘉泰姆	Archi6nn嘉泰姆 tectu6nn嘉泰姆	Phase6nn嘉泰姆	No.of6nn嘉泰姆 PWM6nn嘉泰姆 Output6nn嘉泰姆	Output 6nn嘉泰姆 Current6nn嘉泰姆 (A) 6nn嘉泰姆	min6nn嘉泰姆	max6nn嘉泰姆	Reference6nn嘉泰姆 Voltage6nn嘉泰姆 (V) 6nn嘉泰姆	Bias 6nn嘉泰姆 Voltage6nn嘉泰姆 (V) 6nn嘉泰姆	Quiescent6nn嘉泰姆 Current6nn嘉泰姆 (uA) 6nn嘉泰姆
CXSD62736nn嘉泰姆	SOP-146nn嘉泰姆 QSOP-166nn嘉泰姆 QFN4x4-166nn嘉泰姆	VM 6nn嘉泰姆	1 6nn嘉泰姆	1 6nn嘉泰姆	306nn嘉泰姆	2.9 6nn嘉泰姆	13.26nn嘉泰姆	0.96nn嘉泰姆	12 6nn嘉泰姆	80006nn嘉泰姆
CXSD62746nn嘉泰姆	SOP-86nn嘉泰姆	VM 6nn嘉泰姆	16nn嘉泰姆	16nn嘉泰姆	206nn嘉泰姆	2.9 6nn嘉泰姆	13.2 6nn嘉泰姆	0.86nn嘉泰姆	126nn嘉泰姆	50006nn嘉泰姆
CXSD6274C6nn嘉泰姆	SOP-86nn嘉泰姆	VM6nn嘉泰姆	16nn嘉泰姆	16nn嘉泰姆	206nn嘉泰姆	2.96nn嘉泰姆	13.26nn嘉泰姆	0.86nn嘉泰姆	126nn嘉泰姆	50006nn嘉泰姆
CXSD62756nn嘉泰姆	QFN4x4-246nn嘉泰姆	VM6nn嘉泰姆	26nn嘉泰姆	16nn嘉泰姆	606nn嘉泰姆	3.16nn嘉泰姆	13.26nn嘉泰姆	0.66nn嘉泰姆	126nn嘉泰姆	50006nn嘉泰姆
CXSD62766nn嘉泰姆	SOP-86nn嘉泰姆	VM6nn嘉泰姆	16nn嘉泰姆	16nn嘉泰姆	206nn嘉泰姆	2.26nn嘉泰姆	13.26nn嘉泰姆	0.86nn嘉泰姆	5~126nn嘉泰姆	21006nn嘉泰姆
CXSD6276A6nn嘉泰姆	SOP-86nn嘉泰姆	VM6nn嘉泰姆	16nn嘉泰姆	16nn嘉泰姆	206nn嘉泰姆	2.26nn嘉泰姆	13.26nn嘉泰姆	0.86nn嘉泰姆	5~126nn嘉泰姆	21006nn嘉泰姆
CXSD6277/A/B6nn嘉泰姆	SOP8\|TSSOP86nn嘉泰姆	VM6nn嘉泰姆	16nn嘉泰姆	16nn嘉泰姆	56nn嘉泰姆	56nn嘉泰姆	13.26nn嘉泰姆	1.25\|0.86nn嘉泰姆	5~126nn嘉泰姆	30006nn嘉泰姆
CXSD62786nn嘉泰姆	SOP-86nn嘉泰姆	VM6nn嘉泰姆	16nn嘉泰姆	16nn嘉泰姆	106nn嘉泰姆	3.36nn嘉泰姆	5.56nn嘉泰姆	0.86nn嘉泰姆	56nn嘉泰姆	21006nn嘉泰姆
CXSD6279B6nn嘉泰姆	SOP-146nn嘉泰姆	VM 6nn嘉泰姆	16nn嘉泰姆	16nn嘉泰姆	106nn嘉泰姆	56nn嘉泰姆	13.26nn嘉泰姆	0.86nn嘉泰姆	126nn嘉泰姆	20006nn嘉泰姆
CXSD62806nn嘉泰姆	TSSOP-246nn嘉泰姆 \|QFN5x5-326nn嘉泰姆	VM6nn嘉泰姆	16nn嘉泰姆	26nn嘉泰姆	206nn嘉泰姆	56nn嘉泰姆	13.26nn嘉泰姆	0.66nn嘉泰姆	5~126nn嘉泰姆	40006nn嘉泰姆
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CXSD62826nn嘉泰姆	SOP-146nn嘉泰姆	VM6nn嘉泰姆	16nn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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