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：171

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gMX嘉泰姆

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

一,产品概述(General Description) gMX嘉泰姆

The CXSD6280 has two synchronous buck PWM control-lersgMX嘉泰姆
and one linear controller with high precision internal references voltagegMX嘉泰姆
to offer accurate outputs. The PWM controllers are designed to drivegMX嘉泰姆
two N-channel MOSFETs in synchronous buck topology, and the lineargMX嘉泰姆
controller drives an external N-channel MOSFET. The device re-quiresgMX嘉泰姆
12V and 5V power supplies, if the 5V supply is not available, VCC12 cangMX嘉泰姆
offer an optional shunt regulator 5.8V for 5V supply.All outputs havegMX嘉泰姆
independent soft-start and enable func-tions by SS/EN pins to control.gMX嘉泰姆
Connect a capacitor from each SS/EN pin to the ground for setting thegMX嘉泰姆
soft-start time, and pulling the SS/EN pin below 1V to disable regulator.gMX嘉泰姆
Pull the SS2/EN2 to VCC, enter the DDR mode,the SS1/EN1 controlsgMX嘉泰姆
both VOUT1 and VOUT2, and al-lows VOUT2 to track VOUT1. It alsogMX嘉泰姆
offers the phase shift function by REFOUT pin to select the phase shiftgMX嘉泰姆
between VOUT1 and VOUT2 in DDR mode or Independent mode.gMX嘉泰姆
When all SS/EN pins exceed 3.3V and no faults are detected, the PGOODgMX嘉泰姆
pin goes high to indicate the regu-lators are ready. If any of the SS/EN pinsgMX嘉泰姆
goes below 3.2V or any of the outputs has a fault condition, the PGOOD pingMX嘉泰姆
will be pulled low.gMX嘉泰姆
The internal oscillator is nominally 300kHz (keep the FS/SYNC pin opengMX嘉泰姆
or short to GND), and it offers the pro-grammable frequency function fromgMX嘉泰姆
70kHz to 800kHz; con-necting a resistor from FS/SYNC to VCC12 to decreasegMX嘉泰姆
the frequency, conversely, connect a resistor from FS/SYNC to GND togMX嘉泰姆
increase the frequency.The IC also pro-vides the synchronous frequencygMX嘉泰姆
function. Connect the LGATE signal of another converter to FS/SYNC pin;gMX嘉泰姆
forc-ing the switching frequency to follow the external clock.
The possible synchronous frequency is from 150kHz to 800kHz. TheregMX嘉泰姆
is no Rds(on) sensing or under-voltage sens-ing on CXSD6280. However, itgMX嘉泰姆
provides a simple short-circuit protection by monitoring the COMP1 and COMP2gMX嘉泰姆
for over-voltage. When any of two pins exceeds their trip point and the conditiongMX嘉泰姆
persists for 1-2 internal clock cycle (3-6μs at 300kHz), then it will shut downgMX嘉泰姆
all regulators.gMX嘉泰姆
二.产品特点(Features)gMX嘉泰姆

1.)Two Synchronous Buck Converters and A Linear RegulatorgMX嘉泰姆
2.)VIN Range up to 12VgMX嘉泰姆
3.)Input Power Supplies Require 12V and 5V orgMX嘉泰姆
4.)Use 12V to Generate a Shunt Regulator 5.8VgMX嘉泰姆
5.)0.6V Reference for VOUT1 and VOUT3 with 0.8% AccurategMX嘉泰姆
6.)3.3V Reference for VOUT2 with 0.8% AccurategMX嘉泰姆
7.)Buffered VTT Reference OutputgMX嘉泰姆
8.)Three Outputs have Independent Soft-Start and EnablegMX嘉泰姆
9.)Internal 300kHz Oscillator and ProgrammablegMX嘉泰姆
10.)Frequency Range from 70 kHz to 800kHzgMX嘉泰姆
11.)Synchronous Switching FrequencygMX嘉泰姆
12.)DDR Mode or Independent Mode SelectiongMX嘉泰姆
13.)Phase Shift SelectiongMX嘉泰姆
14.)Power Good FunctiongMX嘉泰姆

15.)Short-Circuit Protection for VOUT1 and VOUT2gMX嘉泰姆
16.)Thermally Enhanced TSSOP-24P and QFN5x5-32 PackagesgMX嘉泰姆
17.)Lead Free and Green Devices Available (RoHS Compliant) gMX嘉泰姆
三,应用范围 (Applications)gMX嘉泰姆

Graphic CardsgMX嘉泰姆
DDR memory Power SuppliesgMX嘉泰姆
Low-Voltage Distributed Power SuppliesgMX嘉泰姆
四.下载产品资料PDF文档 gMX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！gMX嘉泰姆

QQ截图20160419174301.jpg gMX嘉泰姆

五,产品封装图 (Package)gMX嘉泰姆

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

PINgMX嘉泰姆			FUNCTIONgMX嘉泰姆
NO.gMX嘉泰姆		NAMEgMX嘉泰姆
TSSOP-24PgMX嘉泰姆	DFN5x5-32gMX嘉泰姆	NAMEgMX嘉泰姆

1gMX嘉泰姆	29gMX嘉泰姆	FB1gMX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.gMX嘉泰姆
2gMX嘉泰姆	30gMX嘉泰姆	COMP1gMX嘉泰姆	These pins are the outputs of error amplifiers of their respective regulators. They are used to set the compensation components.gMX嘉泰姆
3gMX嘉泰姆	31gMX嘉泰姆	COMP2gMX嘉泰姆
4gMX嘉泰姆	32gMX嘉泰姆	FB2gMX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.gMX嘉泰姆
5gMX嘉泰姆	1gMX嘉泰姆	REFINgMX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.gMX嘉泰姆
6gMX嘉泰姆	3gMX嘉泰姆	REFOUTgMX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 pingMX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.gMX嘉泰姆
7gMX嘉泰姆	4gMX嘉泰姆	SS1/EN1gMX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.gMX嘉泰姆
8gMX嘉泰姆	5gMX嘉泰姆	SS2/EN2gMX嘉泰姆
9gMX嘉泰姆	6gMX嘉泰姆	SS3/EN3gMX嘉泰姆
10gMX嘉泰姆	7gMX嘉泰姆	VREFgMX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 stabilitygMX嘉泰姆
11gMX嘉泰姆	8gMX嘉泰姆	DRIVE3gMX嘉泰姆	This pin drives the gate of an external N-channel MOSFET for linear regulator.gMX嘉泰姆
12gMX嘉泰姆	10gMX嘉泰姆	FB3gMX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.gMX嘉泰姆
13gMX嘉泰姆	11gMX嘉泰姆	FS/SYNCgMX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.gMX嘉泰姆
14gMX嘉泰姆	12gMX嘉泰姆	PGOODgMX嘉泰姆	This pin is an open drain device; connect a pull up resistor to the VCC for PGOOD function.gMX嘉泰姆
15gMX嘉泰姆	13gMX嘉泰姆	GNDgMX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.gMX嘉泰姆
16gMX嘉泰姆	16gMX嘉泰姆	BOOT2gMX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.gMX嘉泰姆
17gMX嘉泰姆	14gMX嘉泰姆	UGATE2gMX嘉泰姆	These pins provide the gate driver for the upper MOSFETs of VOUT1 and VOUT2.gMX嘉泰姆
18gMX嘉泰姆	18,23gMX嘉泰姆	PGNDgMX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.gMX嘉泰姆
19gMX嘉泰姆	20gMX嘉泰姆	LGATE2gMX嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.gMX嘉泰姆
20gMX嘉泰姆	21gMX嘉泰姆	LGATE1gMX嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.gMX嘉泰姆
21gMX嘉泰姆	19, 22gMX嘉泰姆	VCC12gMX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.gMX嘉泰姆

六.电路原理图gMX嘉泰姆

gMX嘉泰姆

七,功能概述gMX嘉泰姆

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

八,相关产品 更多同类产品...... gMX嘉泰姆

Switching Regulator > Buck ControllergMX嘉泰姆
Part_No gMX嘉泰姆	Package gMX嘉泰姆	ArchigMX嘉泰姆 tectugMX嘉泰姆	PhasegMX嘉泰姆	No.ofgMX嘉泰姆 PWMgMX嘉泰姆 OutputgMX嘉泰姆	Output gMX嘉泰姆 CurrentgMX嘉泰姆 (A) gMX嘉泰姆	InputgMX嘉泰姆 Voltage (V) gMX嘉泰姆		ReferencegMX嘉泰姆 VoltagegMX嘉泰姆 (V) gMX嘉泰姆	Bias gMX嘉泰姆 VoltagegMX嘉泰姆 (V) gMX嘉泰姆	QuiescentgMX嘉泰姆 CurrentgMX嘉泰姆 (uA) gMX嘉泰姆
Part_No gMX嘉泰姆	Package gMX嘉泰姆	ArchigMX嘉泰姆 tectugMX嘉泰姆	PhasegMX嘉泰姆	No.ofgMX嘉泰姆 PWMgMX嘉泰姆 OutputgMX嘉泰姆	Output gMX嘉泰姆 CurrentgMX嘉泰姆 (A) gMX嘉泰姆	mingMX嘉泰姆	maxgMX嘉泰姆	ReferencegMX嘉泰姆 VoltagegMX嘉泰姆 (V) gMX嘉泰姆	Bias gMX嘉泰姆 VoltagegMX嘉泰姆 (V) gMX嘉泰姆	QuiescentgMX嘉泰姆 CurrentgMX嘉泰姆 (uA) gMX嘉泰姆
CXSD6273gMX嘉泰姆	SOP-14gMX嘉泰姆 QSOP-16gMX嘉泰姆 QFN4x4-16gMX嘉泰姆	VM gMX嘉泰姆	1 gMX嘉泰姆	1 gMX嘉泰姆	30gMX嘉泰姆	2.9 gMX嘉泰姆	13.2gMX嘉泰姆	0.9gMX嘉泰姆	12 gMX嘉泰姆	8000gMX嘉泰姆
CXSD6274gMX嘉泰姆	SOP-8gMX嘉泰姆	VM gMX嘉泰姆	1gMX嘉泰姆	1gMX嘉泰姆	20gMX嘉泰姆	2.9 gMX嘉泰姆	13.2 gMX嘉泰姆	0.8gMX嘉泰姆	12gMX嘉泰姆	5000gMX嘉泰姆
CXSD6274CgMX嘉泰姆	SOP-8gMX嘉泰姆	VMgMX嘉泰姆	1gMX嘉泰姆	1gMX嘉泰姆	20gMX嘉泰姆	2.9gMX嘉泰姆	13.2gMX嘉泰姆	0.8gMX嘉泰姆	12gMX嘉泰姆	5000gMX嘉泰姆
CXSD6275gMX嘉泰姆	QFN4x4-24gMX嘉泰姆	VMgMX嘉泰姆	2gMX嘉泰姆	1gMX嘉泰姆	60gMX嘉泰姆	3.1gMX嘉泰姆	13.2gMX嘉泰姆	0.6gMX嘉泰姆	12gMX嘉泰姆	5000gMX嘉泰姆
CXSD6276gMX嘉泰姆	SOP-8gMX嘉泰姆	VMgMX嘉泰姆	1gMX嘉泰姆	1gMX嘉泰姆	20gMX嘉泰姆	2.2gMX嘉泰姆	13.2gMX嘉泰姆	0.8gMX嘉泰姆	5~12gMX嘉泰姆	2100gMX嘉泰姆
CXSD6276AgMX嘉泰姆	SOP-8gMX嘉泰姆	VMgMX嘉泰姆	1gMX嘉泰姆	1gMX嘉泰姆	20gMX嘉泰姆	2.2gMX嘉泰姆	13.2gMX嘉泰姆	0.8gMX嘉泰姆	5~12gMX嘉泰姆	2100gMX嘉泰姆
CXSD6277/A/BgMX嘉泰姆	SOP8\|TSSOP8gMX嘉泰姆	VMgMX嘉泰姆	1gMX嘉泰姆	1gMX嘉泰姆	5gMX嘉泰姆	5gMX嘉泰姆	13.2gMX嘉泰姆	1.25\|0.8gMX嘉泰姆	5~12gMX嘉泰姆	3000gMX嘉泰姆
CXSD6278gMX嘉泰姆	SOP-8gMX嘉泰姆	VMgMX嘉泰姆	1gMX嘉泰姆	1gMX嘉泰姆	10gMX嘉泰姆	3.3gMX嘉泰姆	5.5gMX嘉泰姆	0.8gMX嘉泰姆	5gMX嘉泰姆	2100gMX嘉泰姆
CXSD6279BgMX嘉泰姆	SOP-14gMX嘉泰姆	VM gMX嘉泰姆	1gMX嘉泰姆	1gMX嘉泰姆	10gMX嘉泰姆	5gMX嘉泰姆	13.2gMX嘉泰姆	0.8gMX嘉泰姆	12gMX嘉泰姆	2000gMX嘉泰姆
CXSD6280gMX嘉泰姆	TSSOP-24gMX嘉泰姆 \|QFN5x5-32gMX嘉泰姆	VMgMX嘉泰姆	1gMX嘉泰姆	2gMX嘉泰姆	20gMX嘉泰姆	5gMX嘉泰姆	13.2gMX嘉泰姆	0.6gMX嘉泰姆	5~12gMX嘉泰姆	4000gMX嘉泰姆
CXSD6281NgMX嘉泰姆	SOP14gMX嘉泰姆 QSOP16gMX嘉泰姆 QFN-16gMX嘉泰姆	VMgMX嘉泰姆	1gMX嘉泰姆	1gMX嘉泰姆	30gMX嘉泰姆	2.9gMX嘉泰姆	13.2gMX嘉泰姆	0.9gMX嘉泰姆	12gMX嘉泰姆	4000gMX嘉泰姆
CXSD6282gMX嘉泰姆	SOP-14gMX嘉泰姆	VMgMX嘉泰姆	1gMX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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