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：317

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HA9嘉泰姆

1.产品概述         2.产品特点HA9嘉泰姆
3.应用范围       4.下载产品资料PDF文档 HA9嘉泰姆
5.产品封装图                     6.电路原理图             HA9嘉泰姆
7.功能概述       8.相关产品HA9嘉泰姆

一,产品概述(General Description) HA9嘉泰姆

The CXSD6280 has two synchronous buck PWM control-lersHA9嘉泰姆
and one linear controller with high precision internal references voltageHA9嘉泰姆
to offer accurate outputs. The PWM controllers are designed to driveHA9嘉泰姆
two N-channel MOSFETs in synchronous buck topology, and the linearHA9嘉泰姆
controller drives an external N-channel MOSFET. The device re-quiresHA9嘉泰姆
12V and 5V power supplies, if the 5V supply is not available, VCC12 canHA9嘉泰姆
offer an optional shunt regulator 5.8V for 5V supply.All outputs haveHA9嘉泰姆
independent soft-start and enable func-tions by SS/EN pins to control.HA9嘉泰姆
Connect a capacitor from each SS/EN pin to the ground for setting theHA9嘉泰姆
soft-start time, and pulling the SS/EN pin below 1V to disable regulator.HA9嘉泰姆
Pull the SS2/EN2 to VCC, enter the DDR mode,the SS1/EN1 controlsHA9嘉泰姆
both VOUT1 and VOUT2, and al-lows VOUT2 to track VOUT1. It alsoHA9嘉泰姆
offers the phase shift function by REFOUT pin to select the phase shiftHA9嘉泰姆
between VOUT1 and VOUT2 in DDR mode or Independent mode.HA9嘉泰姆
When all SS/EN pins exceed 3.3V and no faults are detected, the PGOODHA9嘉泰姆
pin goes high to indicate the regu-lators are ready. If any of the SS/EN pinsHA9嘉泰姆
goes below 3.2V or any of the outputs has a fault condition, the PGOOD pinHA9嘉泰姆
will be pulled low.HA9嘉泰姆
The internal oscillator is nominally 300kHz (keep the FS/SYNC pin openHA9嘉泰姆
or short to GND), and it offers the pro-grammable frequency function fromHA9嘉泰姆
70kHz to 800kHz; con-necting a resistor from FS/SYNC to VCC12 to decreaseHA9嘉泰姆
the frequency, conversely, connect a resistor from FS/SYNC to GND toHA9嘉泰姆
increase the frequency.The IC also pro-vides the synchronous frequencyHA9嘉泰姆
function. Connect the LGATE signal of another converter to FS/SYNC pin;HA9嘉泰姆
forc-ing the switching frequency to follow the external clock.
The possible synchronous frequency is from 150kHz to 800kHz. ThereHA9嘉泰姆
is no Rds(on) sensing or under-voltage sens-ing on CXSD6280. However, itHA9嘉泰姆
provides a simple short-circuit protection by monitoring the COMP1 and COMP2HA9嘉泰姆
for over-voltage. When any of two pins exceeds their trip point and the conditionHA9嘉泰姆
persists for 1-2 internal clock cycle (3-6μs at 300kHz), then it will shut downHA9嘉泰姆
all regulators.HA9嘉泰姆
二.产品特点(Features)HA9嘉泰姆

1.)Two Synchronous Buck Converters and A Linear RegulatorHA9嘉泰姆
2.)VIN Range up to 12VHA9嘉泰姆
3.)Input Power Supplies Require 12V and 5V orHA9嘉泰姆
4.)Use 12V to Generate a Shunt Regulator 5.8VHA9嘉泰姆
5.)0.6V Reference for VOUT1 and VOUT3 with 0.8% AccurateHA9嘉泰姆
6.)3.3V Reference for VOUT2 with 0.8% AccurateHA9嘉泰姆
7.)Buffered VTT Reference OutputHA9嘉泰姆
8.)Three Outputs have Independent Soft-Start and EnableHA9嘉泰姆
9.)Internal 300kHz Oscillator and ProgrammableHA9嘉泰姆
10.)Frequency Range from 70 kHz to 800kHzHA9嘉泰姆
11.)Synchronous Switching FrequencyHA9嘉泰姆
12.)DDR Mode or Independent Mode SelectionHA9嘉泰姆
13.)Phase Shift SelectionHA9嘉泰姆
14.)Power Good FunctionHA9嘉泰姆

15.)Short-Circuit Protection for VOUT1 and VOUT2HA9嘉泰姆
16.)Thermally Enhanced TSSOP-24P and QFN5x5-32 PackagesHA9嘉泰姆
17.)Lead Free and Green Devices Available (RoHS Compliant) HA9嘉泰姆
三,应用范围 (Applications)HA9嘉泰姆

Graphic CardsHA9嘉泰姆
DDR memory Power SuppliesHA9嘉泰姆
Low-Voltage Distributed Power SuppliesHA9嘉泰姆
四.下载产品资料PDF文档 HA9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！HA9嘉泰姆

QQ截图20160419174301.jpg HA9嘉泰姆

五,产品封装图 (Package)HA9嘉泰姆

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FUNCTIONNAMEFUNCTIONHA9嘉泰姆
These pins are the outputs of error amplifiers of their respective regulators. They areHA9嘉泰姆
used to set the compensation components.HA9嘉泰姆
These pins provide two functions. Connect a capacitor to the GND for setting theHA9嘉泰姆
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable theHA9嘉泰姆
respective output, leave open to enable the respective output.HA9嘉泰姆
These pins provide two functions. Connect a capacitor to the GND for setting theHA9嘉泰姆
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable theHA9嘉泰姆
respective output, leave open to enable the respective output.HA9嘉泰姆

PINHA9嘉泰姆			FUNCTIONHA9嘉泰姆
NO.HA9嘉泰姆		NAMEHA9嘉泰姆
TSSOP-24PHA9嘉泰姆	DFN5x5-32HA9嘉泰姆	NAMEHA9嘉泰姆

1HA9嘉泰姆	29HA9嘉泰姆	FB1HA9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.HA9嘉泰姆
2HA9嘉泰姆	30HA9嘉泰姆	COMP1HA9嘉泰姆	These pins are the outputs of error amplifiers of their respective regulators. They are used to set the compensation components.HA9嘉泰姆
3HA9嘉泰姆	31HA9嘉泰姆	COMP2HA9嘉泰姆
4HA9嘉泰姆	32HA9嘉泰姆	FB2HA9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.HA9嘉泰姆
5HA9嘉泰姆	1HA9嘉泰姆	REFINHA9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.HA9嘉泰姆
6HA9嘉泰姆	3HA9嘉泰姆	REFOUTHA9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 pinHA9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.HA9嘉泰姆
7HA9嘉泰姆	4HA9嘉泰姆	SS1/EN1HA9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.HA9嘉泰姆
8HA9嘉泰姆	5HA9嘉泰姆	SS2/EN2HA9嘉泰姆
9HA9嘉泰姆	6HA9嘉泰姆	SS3/EN3HA9嘉泰姆
10HA9嘉泰姆	7HA9嘉泰姆	VREFHA9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 stabilityHA9嘉泰姆
11HA9嘉泰姆	8HA9嘉泰姆	DRIVE3HA9嘉泰姆	This pin drives the gate of an external N-channel MOSFET for linear regulator.HA9嘉泰姆
12HA9嘉泰姆	10HA9嘉泰姆	FB3HA9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.HA9嘉泰姆
13HA9嘉泰姆	11HA9嘉泰姆	FS/SYNCHA9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.HA9嘉泰姆
14HA9嘉泰姆	12HA9嘉泰姆	PGOODHA9嘉泰姆	This pin is an open drain device; connect a pull up resistor to the VCC for PGOOD function.HA9嘉泰姆
15HA9嘉泰姆	13HA9嘉泰姆	GNDHA9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.HA9嘉泰姆
16HA9嘉泰姆	16HA9嘉泰姆	BOOT2HA9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.HA9嘉泰姆
17HA9嘉泰姆	14HA9嘉泰姆	UGATE2HA9嘉泰姆	These pins provide the gate driver for the upper MOSFETs of VOUT1 and VOUT2.HA9嘉泰姆
18HA9嘉泰姆	18,23HA9嘉泰姆	PGNDHA9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.HA9嘉泰姆
19HA9嘉泰姆	20HA9嘉泰姆	LGATE2HA9嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.HA9嘉泰姆
20HA9嘉泰姆	21HA9嘉泰姆	LGATE1HA9嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.HA9嘉泰姆
21HA9嘉泰姆	19, 22HA9嘉泰姆	VCC12HA9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.HA9嘉泰姆

六.电路原理图HA9嘉泰姆

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七,功能概述HA9嘉泰姆

Soft-Start/EnableHA9嘉泰姆
The three SS/EN pins control the soft-start and enable or disable the controller. In Independent mode, the threeHA9嘉泰姆
regulators all have independent soft-start and enable functions. Connect a soft-start capacitor from each SS/ENHA9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-HA9嘉泰姆
able the respective output.HA9嘉泰姆

八,相关产品 更多同类产品...... HA9嘉泰姆

Switching Regulator > Buck ControllerHA9嘉泰姆
Part_No HA9嘉泰姆	Package HA9嘉泰姆	ArchiHA9嘉泰姆 tectuHA9嘉泰姆	PhaseHA9嘉泰姆	No.ofHA9嘉泰姆 PWMHA9嘉泰姆 OutputHA9嘉泰姆	Output HA9嘉泰姆 CurrentHA9嘉泰姆 (A) HA9嘉泰姆	InputHA9嘉泰姆 Voltage (V) HA9嘉泰姆		ReferenceHA9嘉泰姆 VoltageHA9嘉泰姆 (V) HA9嘉泰姆	Bias HA9嘉泰姆 VoltageHA9嘉泰姆 (V) HA9嘉泰姆	QuiescentHA9嘉泰姆 CurrentHA9嘉泰姆 (uA) HA9嘉泰姆
Part_No HA9嘉泰姆	Package HA9嘉泰姆	ArchiHA9嘉泰姆 tectuHA9嘉泰姆	PhaseHA9嘉泰姆	No.ofHA9嘉泰姆 PWMHA9嘉泰姆 OutputHA9嘉泰姆	Output HA9嘉泰姆 CurrentHA9嘉泰姆 (A) HA9嘉泰姆	minHA9嘉泰姆	maxHA9嘉泰姆	ReferenceHA9嘉泰姆 VoltageHA9嘉泰姆 (V) HA9嘉泰姆	Bias HA9嘉泰姆 VoltageHA9嘉泰姆 (V) HA9嘉泰姆	QuiescentHA9嘉泰姆 CurrentHA9嘉泰姆 (uA) HA9嘉泰姆
CXSD6273HA9嘉泰姆	SOP-14HA9嘉泰姆 QSOP-16HA9嘉泰姆 QFN4x4-16HA9嘉泰姆	VM HA9嘉泰姆	1 HA9嘉泰姆	1 HA9嘉泰姆	30HA9嘉泰姆	2.9 HA9嘉泰姆	13.2HA9嘉泰姆	0.9HA9嘉泰姆	12 HA9嘉泰姆	8000HA9嘉泰姆
CXSD6274HA9嘉泰姆	SOP-8HA9嘉泰姆	VM HA9嘉泰姆	1HA9嘉泰姆	1HA9嘉泰姆	20HA9嘉泰姆	2.9 HA9嘉泰姆	13.2 HA9嘉泰姆	0.8HA9嘉泰姆	12HA9嘉泰姆	5000HA9嘉泰姆
CXSD6274CHA9嘉泰姆	SOP-8HA9嘉泰姆	VMHA9嘉泰姆	1HA9嘉泰姆	1HA9嘉泰姆	20HA9嘉泰姆	2.9HA9嘉泰姆	13.2HA9嘉泰姆	0.8HA9嘉泰姆	12HA9嘉泰姆	5000HA9嘉泰姆
CXSD6275HA9嘉泰姆	QFN4x4-24HA9嘉泰姆	VMHA9嘉泰姆	2HA9嘉泰姆	1HA9嘉泰姆	60HA9嘉泰姆	3.1HA9嘉泰姆	13.2HA9嘉泰姆	0.6HA9嘉泰姆	12HA9嘉泰姆	5000HA9嘉泰姆
CXSD6276HA9嘉泰姆	SOP-8HA9嘉泰姆	VMHA9嘉泰姆	1HA9嘉泰姆	1HA9嘉泰姆	20HA9嘉泰姆	2.2HA9嘉泰姆	13.2HA9嘉泰姆	0.8HA9嘉泰姆	5~12HA9嘉泰姆	2100HA9嘉泰姆
CXSD6276AHA9嘉泰姆	SOP-8HA9嘉泰姆	VMHA9嘉泰姆	1HA9嘉泰姆	1HA9嘉泰姆	20HA9嘉泰姆	2.2HA9嘉泰姆	13.2HA9嘉泰姆	0.8HA9嘉泰姆	5~12HA9嘉泰姆	2100HA9嘉泰姆
CXSD6277/A/BHA9嘉泰姆	SOP8\|TSSOP8HA9嘉泰姆	VMHA9嘉泰姆	1HA9嘉泰姆	1HA9嘉泰姆	5HA9嘉泰姆	5HA9嘉泰姆	13.2HA9嘉泰姆	1.25\|0.8HA9嘉泰姆	5~12HA9嘉泰姆	3000HA9嘉泰姆
CXSD6278HA9嘉泰姆	SOP-8HA9嘉泰姆	VMHA9嘉泰姆	1HA9嘉泰姆	1HA9嘉泰姆	10HA9嘉泰姆	3.3HA9嘉泰姆	5.5HA9嘉泰姆	0.8HA9嘉泰姆	5HA9嘉泰姆	2100HA9嘉泰姆
CXSD6279BHA9嘉泰姆	SOP-14HA9嘉泰姆	VM HA9嘉泰姆	1HA9嘉泰姆	1HA9嘉泰姆	10HA9嘉泰姆	5HA9嘉泰姆	13.2HA9嘉泰姆	0.8HA9嘉泰姆	12HA9嘉泰姆	2000HA9嘉泰姆
CXSD6280HA9嘉泰姆	TSSOP-24HA9嘉泰姆 \|QFN5x5-32HA9嘉泰姆	VMHA9嘉泰姆	1HA9嘉泰姆	2HA9嘉泰姆	20HA9嘉泰姆	5HA9嘉泰姆	13.2HA9嘉泰姆	0.6HA9嘉泰姆	5~12HA9嘉泰姆	4000HA9嘉泰姆
CXSD6281NHA9嘉泰姆	SOP14HA9嘉泰姆 QSOP16HA9嘉泰姆 QFN-16HA9嘉泰姆	VMHA9嘉泰姆	1HA9嘉泰姆	1HA9嘉泰姆	30HA9嘉泰姆	2.9HA9嘉泰姆	13.2HA9嘉泰姆	0.9HA9嘉泰姆	12HA9嘉泰姆	4000HA9嘉泰姆
CXSD6282HA9嘉泰姆	SOP-14HA9嘉泰姆	VMHA9嘉泰姆	1HA9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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