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：68

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9Kt嘉泰姆

1.产品概述         2.产品特点9Kt嘉泰姆
3.应用范围       4.下载产品资料PDF文档 9Kt嘉泰姆
5.产品封装图                     6.电路原理图             9Kt嘉泰姆
7.功能概述       8.相关产品9Kt嘉泰姆

一,产品概述(General Description) 9Kt嘉泰姆

The CXSD6280 has two synchronous buck PWM control-lers9Kt嘉泰姆
and one linear controller with high precision internal references voltage9Kt嘉泰姆
to offer accurate outputs. The PWM controllers are designed to drive9Kt嘉泰姆
two N-channel MOSFETs in synchronous buck topology, and the linear9Kt嘉泰姆
controller drives an external N-channel MOSFET. The device re-quires9Kt嘉泰姆
12V and 5V power supplies, if the 5V supply is not available, VCC12 can9Kt嘉泰姆
offer an optional shunt regulator 5.8V for 5V supply.All outputs have9Kt嘉泰姆
independent soft-start and enable func-tions by SS/EN pins to control.9Kt嘉泰姆
Connect a capacitor from each SS/EN pin to the ground for setting the9Kt嘉泰姆
soft-start time, and pulling the SS/EN pin below 1V to disable regulator.9Kt嘉泰姆
Pull the SS2/EN2 to VCC, enter the DDR mode,the SS1/EN1 controls9Kt嘉泰姆
both VOUT1 and VOUT2, and al-lows VOUT2 to track VOUT1. It also9Kt嘉泰姆
offers the phase shift function by REFOUT pin to select the phase shift9Kt嘉泰姆
between VOUT1 and VOUT2 in DDR mode or Independent mode.9Kt嘉泰姆
When all SS/EN pins exceed 3.3V and no faults are detected, the PGOOD9Kt嘉泰姆
pin goes high to indicate the regu-lators are ready. If any of the SS/EN pins9Kt嘉泰姆
goes below 3.2V or any of the outputs has a fault condition, the PGOOD pin9Kt嘉泰姆
will be pulled low.9Kt嘉泰姆
The internal oscillator is nominally 300kHz (keep the FS/SYNC pin open9Kt嘉泰姆
or short to GND), and it offers the pro-grammable frequency function from9Kt嘉泰姆
70kHz to 800kHz; con-necting a resistor from FS/SYNC to VCC12 to decrease9Kt嘉泰姆
the frequency, conversely, connect a resistor from FS/SYNC to GND to9Kt嘉泰姆
increase the frequency.The IC also pro-vides the synchronous frequency9Kt嘉泰姆
function. Connect the LGATE signal of another converter to FS/SYNC pin;9Kt嘉泰姆
forc-ing the switching frequency to follow the external clock.
The possible synchronous frequency is from 150kHz to 800kHz. There9Kt嘉泰姆
is no Rds(on) sensing or under-voltage sens-ing on CXSD6280. However, it9Kt嘉泰姆
provides a simple short-circuit protection by monitoring the COMP1 and COMP29Kt嘉泰姆
for over-voltage. When any of two pins exceeds their trip point and the condition9Kt嘉泰姆
persists for 1-2 internal clock cycle (3-6μs at 300kHz), then it will shut down9Kt嘉泰姆
all regulators.9Kt嘉泰姆
二.产品特点(Features)9Kt嘉泰姆

1.)Two Synchronous Buck Converters and A Linear Regulator9Kt嘉泰姆
2.)VIN Range up to 12V9Kt嘉泰姆
3.)Input Power Supplies Require 12V and 5V or9Kt嘉泰姆
4.)Use 12V to Generate a Shunt Regulator 5.8V9Kt嘉泰姆
5.)0.6V Reference for VOUT1 and VOUT3 with 0.8% Accurate9Kt嘉泰姆
6.)3.3V Reference for VOUT2 with 0.8% Accurate9Kt嘉泰姆
7.)Buffered VTT Reference Output9Kt嘉泰姆
8.)Three Outputs have Independent Soft-Start and Enable9Kt嘉泰姆
9.)Internal 300kHz Oscillator and Programmable9Kt嘉泰姆
10.)Frequency Range from 70 kHz to 800kHz9Kt嘉泰姆
11.)Synchronous Switching Frequency9Kt嘉泰姆
12.)DDR Mode or Independent Mode Selection9Kt嘉泰姆
13.)Phase Shift Selection9Kt嘉泰姆
14.)Power Good Function9Kt嘉泰姆

15.)Short-Circuit Protection for VOUT1 and VOUT29Kt嘉泰姆
16.)Thermally Enhanced TSSOP-24P and QFN5x5-32 Packages9Kt嘉泰姆
17.)Lead Free and Green Devices Available (RoHS Compliant) 9Kt嘉泰姆
三,应用范围 (Applications)9Kt嘉泰姆

Graphic Cards9Kt嘉泰姆
DDR memory Power Supplies9Kt嘉泰姆
Low-Voltage Distributed Power Supplies9Kt嘉泰姆
四.下载产品资料PDF文档 9Kt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！9Kt嘉泰姆

QQ截图20160419174301.jpg 9Kt嘉泰姆

五,产品封装图 (Package)9Kt嘉泰姆

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FUNCTIONNAMEFUNCTION9Kt嘉泰姆
These pins are the outputs of error amplifiers of their respective regulators. They are9Kt嘉泰姆
used to set the compensation components.9Kt嘉泰姆
These pins provide two functions. Connect a capacitor to the GND for setting the9Kt嘉泰姆
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable the9Kt嘉泰姆
respective output, leave open to enable the respective output.9Kt嘉泰姆
These pins provide two functions. Connect a capacitor to the GND for setting the9Kt嘉泰姆
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable the9Kt嘉泰姆
respective output, leave open to enable the respective output.9Kt嘉泰姆

PIN9Kt嘉泰姆			FUNCTION9Kt嘉泰姆
NO.9Kt嘉泰姆		NAME9Kt嘉泰姆
TSSOP-24P9Kt嘉泰姆	DFN5x5-329Kt嘉泰姆	NAME9Kt嘉泰姆

19Kt嘉泰姆	299Kt嘉泰姆	FB19Kt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.9Kt嘉泰姆
29Kt嘉泰姆	309Kt嘉泰姆	COMP19Kt嘉泰姆	These pins are the outputs of error amplifiers of their respective regulators. They are used to set the compensation components.9Kt嘉泰姆
39Kt嘉泰姆	319Kt嘉泰姆	COMP29Kt嘉泰姆
49Kt嘉泰姆	329Kt嘉泰姆	FB29Kt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.9Kt嘉泰姆
59Kt嘉泰姆	19Kt嘉泰姆	REFIN9Kt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.9Kt嘉泰姆
69Kt嘉泰姆	39Kt嘉泰姆	REFOUT9Kt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 pin9Kt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.9Kt嘉泰姆
79Kt嘉泰姆	49Kt嘉泰姆	SS1/EN19Kt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.9Kt嘉泰姆
89Kt嘉泰姆	59Kt嘉泰姆	SS2/EN29Kt嘉泰姆
99Kt嘉泰姆	69Kt嘉泰姆	SS3/EN39Kt嘉泰姆
109Kt嘉泰姆	79Kt嘉泰姆	VREF9Kt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 stability9Kt嘉泰姆
119Kt嘉泰姆	89Kt嘉泰姆	DRIVE39Kt嘉泰姆	This pin drives the gate of an external N-channel MOSFET for linear regulator.9Kt嘉泰姆
129Kt嘉泰姆	109Kt嘉泰姆	FB39Kt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.9Kt嘉泰姆
139Kt嘉泰姆	119Kt嘉泰姆	FS/SYNC9Kt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.9Kt嘉泰姆
149Kt嘉泰姆	129Kt嘉泰姆	PGOOD9Kt嘉泰姆	This pin is an open drain device; connect a pull up resistor to the VCC for PGOOD function.9Kt嘉泰姆
159Kt嘉泰姆	139Kt嘉泰姆	GND9Kt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.9Kt嘉泰姆
169Kt嘉泰姆	169Kt嘉泰姆	BOOT29Kt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.9Kt嘉泰姆
179Kt嘉泰姆	149Kt嘉泰姆	UGATE29Kt嘉泰姆	These pins provide the gate driver for the upper MOSFETs of VOUT1 and VOUT2.9Kt嘉泰姆
189Kt嘉泰姆	18,239Kt嘉泰姆	PGND9Kt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.9Kt嘉泰姆
199Kt嘉泰姆	209Kt嘉泰姆	LGATE29Kt嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.9Kt嘉泰姆
209Kt嘉泰姆	219Kt嘉泰姆	LGATE19Kt嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.9Kt嘉泰姆
219Kt嘉泰姆	19, 229Kt嘉泰姆	VCC129Kt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.9Kt嘉泰姆

六.电路原理图9Kt嘉泰姆

9Kt嘉泰姆

七,功能概述9Kt嘉泰姆

Soft-Start/Enable9Kt嘉泰姆
The three SS/EN pins control the soft-start and enable or disable the controller. In Independent mode, the three9Kt嘉泰姆
regulators all have independent soft-start and enable functions. Connect a soft-start capacitor from each SS/EN9Kt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-9Kt嘉泰姆
able the respective output.9Kt嘉泰姆

八,相关产品 更多同类产品...... 9Kt嘉泰姆

Switching Regulator > Buck Controller9Kt嘉泰姆
Part_No 9Kt嘉泰姆	Package 9Kt嘉泰姆	Archi9Kt嘉泰姆 tectu9Kt嘉泰姆	Phase9Kt嘉泰姆	No.of9Kt嘉泰姆 PWM9Kt嘉泰姆 Output9Kt嘉泰姆	Output 9Kt嘉泰姆 Current9Kt嘉泰姆 (A) 9Kt嘉泰姆	Input9Kt嘉泰姆 Voltage (V) 9Kt嘉泰姆		Reference9Kt嘉泰姆 Voltage9Kt嘉泰姆 (V) 9Kt嘉泰姆	Bias 9Kt嘉泰姆 Voltage9Kt嘉泰姆 (V) 9Kt嘉泰姆	Quiescent9Kt嘉泰姆 Current9Kt嘉泰姆 (uA) 9Kt嘉泰姆
Part_No 9Kt嘉泰姆	Package 9Kt嘉泰姆	Archi9Kt嘉泰姆 tectu9Kt嘉泰姆	Phase9Kt嘉泰姆	No.of9Kt嘉泰姆 PWM9Kt嘉泰姆 Output9Kt嘉泰姆	Output 9Kt嘉泰姆 Current9Kt嘉泰姆 (A) 9Kt嘉泰姆	min9Kt嘉泰姆	max9Kt嘉泰姆	Reference9Kt嘉泰姆 Voltage9Kt嘉泰姆 (V) 9Kt嘉泰姆	Bias 9Kt嘉泰姆 Voltage9Kt嘉泰姆 (V) 9Kt嘉泰姆	Quiescent9Kt嘉泰姆 Current9Kt嘉泰姆 (uA) 9Kt嘉泰姆
CXSD62739Kt嘉泰姆	SOP-149Kt嘉泰姆 QSOP-169Kt嘉泰姆 QFN4x4-169Kt嘉泰姆	VM 9Kt嘉泰姆	1 9Kt嘉泰姆	1 9Kt嘉泰姆	309Kt嘉泰姆	2.9 9Kt嘉泰姆	13.29Kt嘉泰姆	0.99Kt嘉泰姆	12 9Kt嘉泰姆	80009Kt嘉泰姆
CXSD62749Kt嘉泰姆	SOP-89Kt嘉泰姆	VM 9Kt嘉泰姆	19Kt嘉泰姆	19Kt嘉泰姆	209Kt嘉泰姆	2.9 9Kt嘉泰姆	13.2 9Kt嘉泰姆	0.89Kt嘉泰姆	129Kt嘉泰姆	50009Kt嘉泰姆
CXSD6274C9Kt嘉泰姆	SOP-89Kt嘉泰姆	VM9Kt嘉泰姆	19Kt嘉泰姆	19Kt嘉泰姆	209Kt嘉泰姆	2.99Kt嘉泰姆	13.29Kt嘉泰姆	0.89Kt嘉泰姆	129Kt嘉泰姆	50009Kt嘉泰姆
CXSD62759Kt嘉泰姆	QFN4x4-249Kt嘉泰姆	VM9Kt嘉泰姆	29Kt嘉泰姆	19Kt嘉泰姆	609Kt嘉泰姆	3.19Kt嘉泰姆	13.29Kt嘉泰姆	0.69Kt嘉泰姆	129Kt嘉泰姆	50009Kt嘉泰姆
CXSD62769Kt嘉泰姆	SOP-89Kt嘉泰姆	VM9Kt嘉泰姆	19Kt嘉泰姆	19Kt嘉泰姆	209Kt嘉泰姆	2.29Kt嘉泰姆	13.29Kt嘉泰姆	0.89Kt嘉泰姆	5~129Kt嘉泰姆	21009Kt嘉泰姆
CXSD6276A9Kt嘉泰姆	SOP-89Kt嘉泰姆	VM9Kt嘉泰姆	19Kt嘉泰姆	19Kt嘉泰姆	209Kt嘉泰姆	2.29Kt嘉泰姆	13.29Kt嘉泰姆	0.89Kt嘉泰姆	5~129Kt嘉泰姆	21009Kt嘉泰姆
CXSD6277/A/B9Kt嘉泰姆	SOP8\|TSSOP89Kt嘉泰姆	VM9Kt嘉泰姆	19Kt嘉泰姆	19Kt嘉泰姆	59Kt嘉泰姆	59Kt嘉泰姆	13.29Kt嘉泰姆	1.25\|0.89Kt嘉泰姆	5~129Kt嘉泰姆	30009Kt嘉泰姆
CXSD62789Kt嘉泰姆	SOP-89Kt嘉泰姆	VM9Kt嘉泰姆	19Kt嘉泰姆	19Kt嘉泰姆	109Kt嘉泰姆	3.39Kt嘉泰姆	5.59Kt嘉泰姆	0.89Kt嘉泰姆	59Kt嘉泰姆	21009Kt嘉泰姆
CXSD6279B9Kt嘉泰姆	SOP-149Kt嘉泰姆	VM 9Kt嘉泰姆	19Kt嘉泰姆	19Kt嘉泰姆	109Kt嘉泰姆	59Kt嘉泰姆	13.29Kt嘉泰姆	0.89Kt嘉泰姆	129Kt嘉泰姆	20009Kt嘉泰姆
CXSD62809Kt嘉泰姆	TSSOP-249Kt嘉泰姆 \|QFN5x5-329Kt嘉泰姆	VM9Kt嘉泰姆	19Kt嘉泰姆	29Kt嘉泰姆	209Kt嘉泰姆	59Kt嘉泰姆	13.29Kt嘉泰姆	0.69Kt嘉泰姆	5~129Kt嘉泰姆	40009Kt嘉泰姆
CXSD6281N9Kt嘉泰姆	SOP149Kt嘉泰姆 QSOP169Kt嘉泰姆 QFN-169Kt嘉泰姆	VM9Kt嘉泰姆	19Kt嘉泰姆	19Kt嘉泰姆	309Kt嘉泰姆	2.99Kt嘉泰姆	13.29Kt嘉泰姆	0.99Kt嘉泰姆	129Kt嘉泰姆	40009Kt嘉泰姆
CXSD62829Kt嘉泰姆	SOP-149Kt嘉泰姆	VM9Kt嘉泰姆	19Kt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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