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：170

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CkE嘉泰姆

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

一,产品概述(General Description) CkE嘉泰姆

The CXSD6280 has two synchronous buck PWM control-lersCkE嘉泰姆
and one linear controller with high precision internal references voltageCkE嘉泰姆
to offer accurate outputs. The PWM controllers are designed to driveCkE嘉泰姆
two N-channel MOSFETs in synchronous buck topology, and the linearCkE嘉泰姆
controller drives an external N-channel MOSFET. The device re-quiresCkE嘉泰姆
12V and 5V power supplies, if the 5V supply is not available, VCC12 canCkE嘉泰姆
offer an optional shunt regulator 5.8V for 5V supply.All outputs haveCkE嘉泰姆
independent soft-start and enable func-tions by SS/EN pins to control.CkE嘉泰姆
Connect a capacitor from each SS/EN pin to the ground for setting theCkE嘉泰姆
soft-start time, and pulling the SS/EN pin below 1V to disable regulator.CkE嘉泰姆
Pull the SS2/EN2 to VCC, enter the DDR mode,the SS1/EN1 controlsCkE嘉泰姆
both VOUT1 and VOUT2, and al-lows VOUT2 to track VOUT1. It alsoCkE嘉泰姆
offers the phase shift function by REFOUT pin to select the phase shiftCkE嘉泰姆
between VOUT1 and VOUT2 in DDR mode or Independent mode.CkE嘉泰姆
When all SS/EN pins exceed 3.3V and no faults are detected, the PGOODCkE嘉泰姆
pin goes high to indicate the regu-lators are ready. If any of the SS/EN pinsCkE嘉泰姆
goes below 3.2V or any of the outputs has a fault condition, the PGOOD pinCkE嘉泰姆
will be pulled low.CkE嘉泰姆
The internal oscillator is nominally 300kHz (keep the FS/SYNC pin openCkE嘉泰姆
or short to GND), and it offers the pro-grammable frequency function fromCkE嘉泰姆
70kHz to 800kHz; con-necting a resistor from FS/SYNC to VCC12 to decreaseCkE嘉泰姆
the frequency, conversely, connect a resistor from FS/SYNC to GND toCkE嘉泰姆
increase the frequency.The IC also pro-vides the synchronous frequencyCkE嘉泰姆
function. Connect the LGATE signal of another converter to FS/SYNC pin;CkE嘉泰姆
forc-ing the switching frequency to follow the external clock.
The possible synchronous frequency is from 150kHz to 800kHz. ThereCkE嘉泰姆
is no Rds(on) sensing or under-voltage sens-ing on CXSD6280. However, itCkE嘉泰姆
provides a simple short-circuit protection by monitoring the COMP1 and COMP2CkE嘉泰姆
for over-voltage. When any of two pins exceeds their trip point and the conditionCkE嘉泰姆
persists for 1-2 internal clock cycle (3-6μs at 300kHz), then it will shut downCkE嘉泰姆
all regulators.CkE嘉泰姆
二.产品特点(Features)CkE嘉泰姆

1.)Two Synchronous Buck Converters and A Linear RegulatorCkE嘉泰姆
2.)VIN Range up to 12VCkE嘉泰姆
3.)Input Power Supplies Require 12V and 5V orCkE嘉泰姆
4.)Use 12V to Generate a Shunt Regulator 5.8VCkE嘉泰姆
5.)0.6V Reference for VOUT1 and VOUT3 with 0.8% AccurateCkE嘉泰姆
6.)3.3V Reference for VOUT2 with 0.8% AccurateCkE嘉泰姆
7.)Buffered VTT Reference OutputCkE嘉泰姆
8.)Three Outputs have Independent Soft-Start and EnableCkE嘉泰姆
9.)Internal 300kHz Oscillator and ProgrammableCkE嘉泰姆
10.)Frequency Range from 70 kHz to 800kHzCkE嘉泰姆
11.)Synchronous Switching FrequencyCkE嘉泰姆
12.)DDR Mode or Independent Mode SelectionCkE嘉泰姆
13.)Phase Shift SelectionCkE嘉泰姆
14.)Power Good FunctionCkE嘉泰姆

15.)Short-Circuit Protection for VOUT1 and VOUT2CkE嘉泰姆
16.)Thermally Enhanced TSSOP-24P and QFN5x5-32 PackagesCkE嘉泰姆
17.)Lead Free and Green Devices Available (RoHS Compliant) CkE嘉泰姆
三,应用范围 (Applications)CkE嘉泰姆

Graphic CardsCkE嘉泰姆
DDR memory Power SuppliesCkE嘉泰姆
Low-Voltage Distributed Power SuppliesCkE嘉泰姆
四.下载产品资料PDF文档 CkE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！CkE嘉泰姆

QQ截图20160419174301.jpg CkE嘉泰姆

五,产品封装图 (Package)CkE嘉泰姆

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

PINCkE嘉泰姆			FUNCTIONCkE嘉泰姆
NO.CkE嘉泰姆		NAMECkE嘉泰姆
TSSOP-24PCkE嘉泰姆	DFN5x5-32CkE嘉泰姆	NAMECkE嘉泰姆

1CkE嘉泰姆	29CkE嘉泰姆	FB1CkE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.CkE嘉泰姆
2CkE嘉泰姆	30CkE嘉泰姆	COMP1CkE嘉泰姆	These pins are the outputs of error amplifiers of their respective regulators. They are used to set the compensation components.CkE嘉泰姆
3CkE嘉泰姆	31CkE嘉泰姆	COMP2CkE嘉泰姆
4CkE嘉泰姆	32CkE嘉泰姆	FB2CkE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.CkE嘉泰姆
5CkE嘉泰姆	1CkE嘉泰姆	REFINCkE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.CkE嘉泰姆
6CkE嘉泰姆	3CkE嘉泰姆	REFOUTCkE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 pinCkE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.CkE嘉泰姆
7CkE嘉泰姆	4CkE嘉泰姆	SS1/EN1CkE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.CkE嘉泰姆
8CkE嘉泰姆	5CkE嘉泰姆	SS2/EN2CkE嘉泰姆
9CkE嘉泰姆	6CkE嘉泰姆	SS3/EN3CkE嘉泰姆
10CkE嘉泰姆	7CkE嘉泰姆	VREFCkE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 stabilityCkE嘉泰姆
11CkE嘉泰姆	8CkE嘉泰姆	DRIVE3CkE嘉泰姆	This pin drives the gate of an external N-channel MOSFET for linear regulator.CkE嘉泰姆
12CkE嘉泰姆	10CkE嘉泰姆	FB3CkE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.CkE嘉泰姆
13CkE嘉泰姆	11CkE嘉泰姆	FS/SYNCCkE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.CkE嘉泰姆
14CkE嘉泰姆	12CkE嘉泰姆	PGOODCkE嘉泰姆	This pin is an open drain device; connect a pull up resistor to the VCC for PGOOD function.CkE嘉泰姆
15CkE嘉泰姆	13CkE嘉泰姆	GNDCkE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.CkE嘉泰姆
16CkE嘉泰姆	16CkE嘉泰姆	BOOT2CkE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.CkE嘉泰姆
17CkE嘉泰姆	14CkE嘉泰姆	UGATE2CkE嘉泰姆	These pins provide the gate driver for the upper MOSFETs of VOUT1 and VOUT2.CkE嘉泰姆
18CkE嘉泰姆	18,23CkE嘉泰姆	PGNDCkE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.CkE嘉泰姆
19CkE嘉泰姆	20CkE嘉泰姆	LGATE2CkE嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.CkE嘉泰姆
20CkE嘉泰姆	21CkE嘉泰姆	LGATE1CkE嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.CkE嘉泰姆
21CkE嘉泰姆	19, 22CkE嘉泰姆	VCC12CkE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.CkE嘉泰姆

六.电路原理图CkE嘉泰姆

CkE嘉泰姆

七,功能概述CkE嘉泰姆

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

八,相关产品 更多同类产品...... CkE嘉泰姆

Switching Regulator > Buck ControllerCkE嘉泰姆
Part_No CkE嘉泰姆	Package CkE嘉泰姆	ArchiCkE嘉泰姆 tectuCkE嘉泰姆	PhaseCkE嘉泰姆	No.ofCkE嘉泰姆 PWMCkE嘉泰姆 OutputCkE嘉泰姆	Output CkE嘉泰姆 CurrentCkE嘉泰姆 (A) CkE嘉泰姆	InputCkE嘉泰姆 Voltage (V) CkE嘉泰姆		ReferenceCkE嘉泰姆 VoltageCkE嘉泰姆 (V) CkE嘉泰姆	Bias CkE嘉泰姆 VoltageCkE嘉泰姆 (V) CkE嘉泰姆	QuiescentCkE嘉泰姆 CurrentCkE嘉泰姆 (uA) CkE嘉泰姆
Part_No CkE嘉泰姆	Package CkE嘉泰姆	ArchiCkE嘉泰姆 tectuCkE嘉泰姆	PhaseCkE嘉泰姆	No.ofCkE嘉泰姆 PWMCkE嘉泰姆 OutputCkE嘉泰姆	Output CkE嘉泰姆 CurrentCkE嘉泰姆 (A) CkE嘉泰姆	minCkE嘉泰姆	maxCkE嘉泰姆	ReferenceCkE嘉泰姆 VoltageCkE嘉泰姆 (V) CkE嘉泰姆	Bias CkE嘉泰姆 VoltageCkE嘉泰姆 (V) CkE嘉泰姆	QuiescentCkE嘉泰姆 CurrentCkE嘉泰姆 (uA) CkE嘉泰姆
CXSD6273CkE嘉泰姆	SOP-14CkE嘉泰姆 QSOP-16CkE嘉泰姆 QFN4x4-16CkE嘉泰姆	VM CkE嘉泰姆	1 CkE嘉泰姆	1 CkE嘉泰姆	30CkE嘉泰姆	2.9 CkE嘉泰姆	13.2CkE嘉泰姆	0.9CkE嘉泰姆	12 CkE嘉泰姆	8000CkE嘉泰姆
CXSD6274CkE嘉泰姆	SOP-8CkE嘉泰姆	VM CkE嘉泰姆	1CkE嘉泰姆	1CkE嘉泰姆	20CkE嘉泰姆	2.9 CkE嘉泰姆	13.2 CkE嘉泰姆	0.8CkE嘉泰姆	12CkE嘉泰姆	5000CkE嘉泰姆
CXSD6274CCkE嘉泰姆	SOP-8CkE嘉泰姆	VMCkE嘉泰姆	1CkE嘉泰姆	1CkE嘉泰姆	20CkE嘉泰姆	2.9CkE嘉泰姆	13.2CkE嘉泰姆	0.8CkE嘉泰姆	12CkE嘉泰姆	5000CkE嘉泰姆
CXSD6275CkE嘉泰姆	QFN4x4-24CkE嘉泰姆	VMCkE嘉泰姆	2CkE嘉泰姆	1CkE嘉泰姆	60CkE嘉泰姆	3.1CkE嘉泰姆	13.2CkE嘉泰姆	0.6CkE嘉泰姆	12CkE嘉泰姆	5000CkE嘉泰姆
CXSD6276CkE嘉泰姆	SOP-8CkE嘉泰姆	VMCkE嘉泰姆	1CkE嘉泰姆	1CkE嘉泰姆	20CkE嘉泰姆	2.2CkE嘉泰姆	13.2CkE嘉泰姆	0.8CkE嘉泰姆	5~12CkE嘉泰姆	2100CkE嘉泰姆
CXSD6276ACkE嘉泰姆	SOP-8CkE嘉泰姆	VMCkE嘉泰姆	1CkE嘉泰姆	1CkE嘉泰姆	20CkE嘉泰姆	2.2CkE嘉泰姆	13.2CkE嘉泰姆	0.8CkE嘉泰姆	5~12CkE嘉泰姆	2100CkE嘉泰姆
CXSD6277/A/BCkE嘉泰姆	SOP8\|TSSOP8CkE嘉泰姆	VMCkE嘉泰姆	1CkE嘉泰姆	1CkE嘉泰姆	5CkE嘉泰姆	5CkE嘉泰姆	13.2CkE嘉泰姆	1.25\|0.8CkE嘉泰姆	5~12CkE嘉泰姆	3000CkE嘉泰姆
CXSD6278CkE嘉泰姆	SOP-8CkE嘉泰姆	VMCkE嘉泰姆	1CkE嘉泰姆	1CkE嘉泰姆	10CkE嘉泰姆	3.3CkE嘉泰姆	5.5CkE嘉泰姆	0.8CkE嘉泰姆	5CkE嘉泰姆	2100CkE嘉泰姆
CXSD6279BCkE嘉泰姆	SOP-14CkE嘉泰姆	VM CkE嘉泰姆	1CkE嘉泰姆	1CkE嘉泰姆	10CkE嘉泰姆	5CkE嘉泰姆	13.2CkE嘉泰姆	0.8CkE嘉泰姆	12CkE嘉泰姆	2000CkE嘉泰姆
CXSD6280CkE嘉泰姆	TSSOP-24CkE嘉泰姆 \|QFN5x5-32CkE嘉泰姆	VMCkE嘉泰姆	1CkE嘉泰姆	2CkE嘉泰姆	20CkE嘉泰姆	5CkE嘉泰姆	13.2CkE嘉泰姆	0.6CkE嘉泰姆	5~12CkE嘉泰姆	4000CkE嘉泰姆
CXSD6281NCkE嘉泰姆	SOP14CkE嘉泰姆 QSOP16CkE嘉泰姆 QFN-16CkE嘉泰姆	VMCkE嘉泰姆	1CkE嘉泰姆	1CkE嘉泰姆	30CkE嘉泰姆	2.9CkE嘉泰姆	13.2CkE嘉泰姆	0.9CkE嘉泰姆	12CkE嘉泰姆	4000CkE嘉泰姆
CXSD6282CkE嘉泰姆	SOP-14CkE嘉泰姆	VMCkE嘉泰姆	1CkE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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