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：106

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4s6嘉泰姆

1.产品概述         2.产品特点4s6嘉泰姆
3.应用范围       4.下载产品资料PDF文档 4s6嘉泰姆
5.产品封装图                     6.电路原理图             4s6嘉泰姆
7.功能概述       8.相关产品4s6嘉泰姆

一,产品概述(General Description) 4s6嘉泰姆

The CXSD6280 has two synchronous buck PWM control-lers4s6嘉泰姆
and one linear controller with high precision internal references voltage4s6嘉泰姆
to offer accurate outputs. The PWM controllers are designed to drive4s6嘉泰姆
two N-channel MOSFETs in synchronous buck topology, and the linear4s6嘉泰姆
controller drives an external N-channel MOSFET. The device re-quires4s6嘉泰姆
12V and 5V power supplies, if the 5V supply is not available, VCC12 can4s6嘉泰姆
offer an optional shunt regulator 5.8V for 5V supply.All outputs have4s6嘉泰姆
independent soft-start and enable func-tions by SS/EN pins to control.4s6嘉泰姆
Connect a capacitor from each SS/EN pin to the ground for setting the4s6嘉泰姆
soft-start time, and pulling the SS/EN pin below 1V to disable regulator.4s6嘉泰姆
Pull the SS2/EN2 to VCC, enter the DDR mode,the SS1/EN1 controls4s6嘉泰姆
both VOUT1 and VOUT2, and al-lows VOUT2 to track VOUT1. It also4s6嘉泰姆
offers the phase shift function by REFOUT pin to select the phase shift4s6嘉泰姆
between VOUT1 and VOUT2 in DDR mode or Independent mode.4s6嘉泰姆
When all SS/EN pins exceed 3.3V and no faults are detected, the PGOOD4s6嘉泰姆
pin goes high to indicate the regu-lators are ready. If any of the SS/EN pins4s6嘉泰姆
goes below 3.2V or any of the outputs has a fault condition, the PGOOD pin4s6嘉泰姆
will be pulled low.4s6嘉泰姆
The internal oscillator is nominally 300kHz (keep the FS/SYNC pin open4s6嘉泰姆
or short to GND), and it offers the pro-grammable frequency function from4s6嘉泰姆
70kHz to 800kHz; con-necting a resistor from FS/SYNC to VCC12 to decrease4s6嘉泰姆
the frequency, conversely, connect a resistor from FS/SYNC to GND to4s6嘉泰姆
increase the frequency.The IC also pro-vides the synchronous frequency4s6嘉泰姆
function. Connect the LGATE signal of another converter to FS/SYNC pin;4s6嘉泰姆
forc-ing the switching frequency to follow the external clock.
The possible synchronous frequency is from 150kHz to 800kHz. There4s6嘉泰姆
is no Rds(on) sensing or under-voltage sens-ing on CXSD6280. However, it4s6嘉泰姆
provides a simple short-circuit protection by monitoring the COMP1 and COMP24s6嘉泰姆
for over-voltage. When any of two pins exceeds their trip point and the condition4s6嘉泰姆
persists for 1-2 internal clock cycle (3-6μs at 300kHz), then it will shut down4s6嘉泰姆
all regulators.4s6嘉泰姆
二.产品特点(Features)4s6嘉泰姆

1.)Two Synchronous Buck Converters and A Linear Regulator4s6嘉泰姆
2.)VIN Range up to 12V4s6嘉泰姆
3.)Input Power Supplies Require 12V and 5V or4s6嘉泰姆
4.)Use 12V to Generate a Shunt Regulator 5.8V4s6嘉泰姆
5.)0.6V Reference for VOUT1 and VOUT3 with 0.8% Accurate4s6嘉泰姆
6.)3.3V Reference for VOUT2 with 0.8% Accurate4s6嘉泰姆
7.)Buffered VTT Reference Output4s6嘉泰姆
8.)Three Outputs have Independent Soft-Start and Enable4s6嘉泰姆
9.)Internal 300kHz Oscillator and Programmable4s6嘉泰姆
10.)Frequency Range from 70 kHz to 800kHz4s6嘉泰姆
11.)Synchronous Switching Frequency4s6嘉泰姆
12.)DDR Mode or Independent Mode Selection4s6嘉泰姆
13.)Phase Shift Selection4s6嘉泰姆
14.)Power Good Function4s6嘉泰姆

15.)Short-Circuit Protection for VOUT1 and VOUT24s6嘉泰姆
16.)Thermally Enhanced TSSOP-24P and QFN5x5-32 Packages4s6嘉泰姆
17.)Lead Free and Green Devices Available (RoHS Compliant) 4s6嘉泰姆
三,应用范围 (Applications)4s6嘉泰姆

Graphic Cards4s6嘉泰姆
DDR memory Power Supplies4s6嘉泰姆
Low-Voltage Distributed Power Supplies4s6嘉泰姆
四.下载产品资料PDF文档 4s6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！4s6嘉泰姆

QQ截图20160419174301.jpg 4s6嘉泰姆

五,产品封装图 (Package)4s6嘉泰姆

4s6嘉泰姆
FUNCTIONNAMEFUNCTION4s6嘉泰姆
These pins are the outputs of error amplifiers of their respective regulators. They are4s6嘉泰姆
used to set the compensation components.4s6嘉泰姆
These pins provide two functions. Connect a capacitor to the GND for setting the4s6嘉泰姆
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable the4s6嘉泰姆
respective output, leave open to enable the respective output.4s6嘉泰姆
These pins provide two functions. Connect a capacitor to the GND for setting the4s6嘉泰姆
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable the4s6嘉泰姆
respective output, leave open to enable the respective output.4s6嘉泰姆

PIN4s6嘉泰姆			FUNCTION4s6嘉泰姆
NO.4s6嘉泰姆		NAME4s6嘉泰姆
TSSOP-24P4s6嘉泰姆	DFN5x5-324s6嘉泰姆	NAME4s6嘉泰姆

14s6嘉泰姆	294s6嘉泰姆	FB14s6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.4s6嘉泰姆
24s6嘉泰姆	304s6嘉泰姆	COMP14s6嘉泰姆	These pins are the outputs of error amplifiers of their respective regulators. They are used to set the compensation components.4s6嘉泰姆
34s6嘉泰姆	314s6嘉泰姆	COMP24s6嘉泰姆
44s6嘉泰姆	324s6嘉泰姆	FB24s6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.4s6嘉泰姆
54s6嘉泰姆	14s6嘉泰姆	REFIN4s6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.4s6嘉泰姆
64s6嘉泰姆	34s6嘉泰姆	REFOUT4s6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 pin4s6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.4s6嘉泰姆
74s6嘉泰姆	44s6嘉泰姆	SS1/EN14s6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.4s6嘉泰姆
84s6嘉泰姆	54s6嘉泰姆	SS2/EN24s6嘉泰姆
94s6嘉泰姆	64s6嘉泰姆	SS3/EN34s6嘉泰姆
104s6嘉泰姆	74s6嘉泰姆	VREF4s6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 stability4s6嘉泰姆
114s6嘉泰姆	84s6嘉泰姆	DRIVE34s6嘉泰姆	This pin drives the gate of an external N-channel MOSFET for linear regulator.4s6嘉泰姆
124s6嘉泰姆	104s6嘉泰姆	FB34s6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.4s6嘉泰姆
134s6嘉泰姆	114s6嘉泰姆	FS/SYNC4s6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.4s6嘉泰姆
144s6嘉泰姆	124s6嘉泰姆	PGOOD4s6嘉泰姆	This pin is an open drain device; connect a pull up resistor to the VCC for PGOOD function.4s6嘉泰姆
154s6嘉泰姆	134s6嘉泰姆	GND4s6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.4s6嘉泰姆
164s6嘉泰姆	164s6嘉泰姆	BOOT24s6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.4s6嘉泰姆
174s6嘉泰姆	144s6嘉泰姆	UGATE24s6嘉泰姆	These pins provide the gate driver for the upper MOSFETs of VOUT1 and VOUT2.4s6嘉泰姆
184s6嘉泰姆	18,234s6嘉泰姆	PGND4s6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.4s6嘉泰姆
194s6嘉泰姆	204s6嘉泰姆	LGATE24s6嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.4s6嘉泰姆
204s6嘉泰姆	214s6嘉泰姆	LGATE14s6嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.4s6嘉泰姆
214s6嘉泰姆	19, 224s6嘉泰姆	VCC124s6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.4s6嘉泰姆

六.电路原理图4s6嘉泰姆

4s6嘉泰姆

七,功能概述4s6嘉泰姆

Soft-Start/Enable4s6嘉泰姆
The three SS/EN pins control the soft-start and enable or disable the controller. In Independent mode, the three4s6嘉泰姆
regulators all have independent soft-start and enable functions. Connect a soft-start capacitor from each SS/EN4s6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-4s6嘉泰姆
able the respective output.4s6嘉泰姆

八,相关产品 更多同类产品...... 4s6嘉泰姆

Switching Regulator > Buck Controller4s6嘉泰姆
Part_No 4s6嘉泰姆	Package 4s6嘉泰姆	Archi4s6嘉泰姆 tectu4s6嘉泰姆	Phase4s6嘉泰姆	No.of4s6嘉泰姆 PWM4s6嘉泰姆 Output4s6嘉泰姆	Output 4s6嘉泰姆 Current4s6嘉泰姆 (A) 4s6嘉泰姆	Input4s6嘉泰姆 Voltage (V) 4s6嘉泰姆		Reference4s6嘉泰姆 Voltage4s6嘉泰姆 (V) 4s6嘉泰姆	Bias 4s6嘉泰姆 Voltage4s6嘉泰姆 (V) 4s6嘉泰姆	Quiescent4s6嘉泰姆 Current4s6嘉泰姆 (uA) 4s6嘉泰姆
Part_No 4s6嘉泰姆	Package 4s6嘉泰姆	Archi4s6嘉泰姆 tectu4s6嘉泰姆	Phase4s6嘉泰姆	No.of4s6嘉泰姆 PWM4s6嘉泰姆 Output4s6嘉泰姆	Output 4s6嘉泰姆 Current4s6嘉泰姆 (A) 4s6嘉泰姆	min4s6嘉泰姆	max4s6嘉泰姆	Reference4s6嘉泰姆 Voltage4s6嘉泰姆 (V) 4s6嘉泰姆	Bias 4s6嘉泰姆 Voltage4s6嘉泰姆 (V) 4s6嘉泰姆	Quiescent4s6嘉泰姆 Current4s6嘉泰姆 (uA) 4s6嘉泰姆
CXSD62734s6嘉泰姆	SOP-144s6嘉泰姆 QSOP-164s6嘉泰姆 QFN4x4-164s6嘉泰姆	VM 4s6嘉泰姆	1 4s6嘉泰姆	1 4s6嘉泰姆	304s6嘉泰姆	2.9 4s6嘉泰姆	13.24s6嘉泰姆	0.94s6嘉泰姆	12 4s6嘉泰姆	80004s6嘉泰姆
CXSD62744s6嘉泰姆	SOP-84s6嘉泰姆	VM 4s6嘉泰姆	14s6嘉泰姆	14s6嘉泰姆	204s6嘉泰姆	2.9 4s6嘉泰姆	13.2 4s6嘉泰姆	0.84s6嘉泰姆	124s6嘉泰姆	50004s6嘉泰姆
CXSD6274C4s6嘉泰姆	SOP-84s6嘉泰姆	VM4s6嘉泰姆	14s6嘉泰姆	14s6嘉泰姆	204s6嘉泰姆	2.94s6嘉泰姆	13.24s6嘉泰姆	0.84s6嘉泰姆	124s6嘉泰姆	50004s6嘉泰姆
CXSD62754s6嘉泰姆	QFN4x4-244s6嘉泰姆	VM4s6嘉泰姆	24s6嘉泰姆	14s6嘉泰姆	604s6嘉泰姆	3.14s6嘉泰姆	13.24s6嘉泰姆	0.64s6嘉泰姆	124s6嘉泰姆	50004s6嘉泰姆
CXSD62764s6嘉泰姆	SOP-84s6嘉泰姆	VM4s6嘉泰姆	14s6嘉泰姆	14s6嘉泰姆	204s6嘉泰姆	2.24s6嘉泰姆	13.24s6嘉泰姆	0.84s6嘉泰姆	5~124s6嘉泰姆	21004s6嘉泰姆
CXSD6276A4s6嘉泰姆	SOP-84s6嘉泰姆	VM4s6嘉泰姆	14s6嘉泰姆	14s6嘉泰姆	204s6嘉泰姆	2.24s6嘉泰姆	13.24s6嘉泰姆	0.84s6嘉泰姆	5~124s6嘉泰姆	21004s6嘉泰姆
CXSD6277/A/B4s6嘉泰姆	SOP8\|TSSOP84s6嘉泰姆	VM4s6嘉泰姆	14s6嘉泰姆	14s6嘉泰姆	54s6嘉泰姆	54s6嘉泰姆	13.24s6嘉泰姆	1.25\|0.84s6嘉泰姆	5~124s6嘉泰姆	30004s6嘉泰姆
CXSD62784s6嘉泰姆	SOP-84s6嘉泰姆	VM4s6嘉泰姆	14s6嘉泰姆	14s6嘉泰姆	104s6嘉泰姆	3.34s6嘉泰姆	5.54s6嘉泰姆	0.84s6嘉泰姆	54s6嘉泰姆	21004s6嘉泰姆
CXSD6279B4s6嘉泰姆	SOP-144s6嘉泰姆	VM 4s6嘉泰姆	14s6嘉泰姆	14s6嘉泰姆	104s6嘉泰姆	54s6嘉泰姆	13.24s6嘉泰姆	0.84s6嘉泰姆	124s6嘉泰姆	20004s6嘉泰姆
CXSD62804s6嘉泰姆	TSSOP-244s6嘉泰姆 \|QFN5x5-324s6嘉泰姆	VM4s6嘉泰姆	14s6嘉泰姆	24s6嘉泰姆	204s6嘉泰姆	54s6嘉泰姆	13.24s6嘉泰姆	0.64s6嘉泰姆	5~124s6嘉泰姆	40004s6嘉泰姆
CXSD6281N4s6嘉泰姆	SOP144s6嘉泰姆 QSOP164s6嘉泰姆 QFN-164s6嘉泰姆	VM4s6嘉泰姆	14s6嘉泰姆	14s6嘉泰姆	304s6嘉泰姆	2.94s6嘉泰姆	13.24s6嘉泰姆	0.94s6嘉泰姆	124s6嘉泰姆	40004s6嘉泰姆
CXSD62824s6嘉泰姆	SOP-144s6嘉泰姆	VM4s6嘉泰姆	14s6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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