CXSD62104双降压恒时同步的PWM控制器两个低损耗稳压器PWM1和PWM2的输出可以从2V调整到5.5V

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CXSD62104双降压恒时同步的PWM控制器两个低损耗稳压器PWM1和PWM2的输出可以从2V调整到5.5V

目录r5b嘉泰姆

1.产品概述         2.产品特点r5b嘉泰姆
3.应用范围       4.下载产品资料PDF文档 r5b嘉泰姆
5.产品封装图                     6.电路原理图             r5b嘉泰姆
7.功能概述       8.相关产品r5b嘉泰姆

一,产品概述(General Description) r5b嘉泰姆

The CXSD62104 integrates dual step-down, constant-ontime, synchronousr5b嘉泰姆

PWM controllers (that drives dual N-channel MOSFETs for each channel) andr5b嘉泰姆
two low drop-out regulators as well as various protections into a chip.The PWMr5b嘉泰姆
controllers step down high voltage of a battery to generate low-voltage for NBr5b嘉泰姆
applications. The output of PWM1 and PWM2 can be adjusted from 2V to 5.5Vr5b嘉泰姆
by setting a resistive voltage-divider from VOUTx to GND.The linear regulatorsr5b嘉泰姆
provide 5V and 3.3V output for standby power supply. The linear regulatorsr5b嘉泰姆

provide up to 100mA output current. When the PWMx output voltage is higher r5b嘉泰姆

than LDOx bypass threshold, the related LDOx regulator is shut off and its r5b嘉泰姆

output is connected to VOUTx by internal switchover MOSFET. It can save power dissipation.r5b嘉泰姆
The CXSD62104 provides excellent transient response and accurate DC r5b嘉泰姆

output voltage in either PFM or PWM Mode.In Pulse-Frequency Mode (PFM), r5b嘉泰姆

the CXSD62104 provides very high efficiency over light to heavy loads with r5b嘉泰姆

loading-modulated switching frequencies. The Forced-PWM mode works nearly r5b嘉泰姆

at constant frequency for low-noise requirements. The unique ultrasonic moder5b嘉泰姆

maintains the switching frequency above 25KHz, which eliminates noise in audio applications.r5b嘉泰姆

The CXSD62104 is equipped with accurate sourcing cur-rent-limit, outputr5b嘉泰姆

under-voltage and output over-voltage protections, being perfect for NB r5b嘉泰姆

applications. A 1.7ms (typ.) digital soft-start can reduce the start-up current. r5b嘉泰姆

A soft-stop function actively discharges the output capaci-tors by the discharge r5b嘉泰姆

device. The CXSD62104 has individual enable controls for PWM channels and r5b嘉泰姆

LDOs. Pulling both ENPWM pin and ENLDO pin low shuts down the whole chipr5b嘉泰姆

with low quiescent current close to zero.r5b嘉泰姆
The CXSD62104 is available in a TQFN4x4-24A package.r5b嘉泰姆
二.产品特点(Features)r5b嘉泰姆
Wide Input Voltage Range from 6V to 25Vr5b嘉泰姆
Provide 4 Independent Outputs with ±1.5% Accu-r5b嘉泰姆
racy Over-Temperaturer5b嘉泰姆
- PWM1 Controller with Adjustable (2V to 5.5V) Out-putr5b嘉泰姆
PWM2 Controller with Adjustable (2V to 5.5V) Out-putr5b嘉泰姆
100mA Low Dropout Regulator (LDO5) with Fixed 5V Outputr5b嘉泰姆
100mA Low Dropout Regulator (LDO3) with Fixed 3.3V Outputr5b嘉泰姆
Excellent Line/Load Regulations about ±1.5% Over-Temperature Ranger5b嘉泰姆
±1%, (±1.5%, 50μA) 2.0V Reference Voltage Outputr5b嘉泰姆
Built-In POR Control Scheme Implementedr5b嘉泰姆
Selectable Forced-PWM or Automatic PFM/PWMr5b嘉泰姆
(with Selectable Ultrasonic Operation)r5b嘉泰姆
Constant-On-Time Control Scheme with Frequencyr5b嘉泰姆
Compensation for PWM Moder5b嘉泰姆
Selectable Switching Frequency in PWM Moder5b嘉泰姆
Built-in Digital Soft-Start for PWM Outputs and Soft-r5b嘉泰姆
Stop for PWM Outputs and LDO Outputsr5b嘉泰姆
Integrated Bootstrap Forward P-CH MOSFETr5b嘉泰姆
High Efficiency over Light to Full Load Range (PWMs)r5b嘉泰姆
Built-in Power Good Indicators (PWMs)r5b嘉泰姆
Independent Enable Inputs (PWMs, LDO)r5b嘉泰姆

70% Under-Voltage and 125% Over-Voltage Protec-tions (PWM)r5b嘉泰姆

Adjustable Current-Limit Protection (PWMs)r5b嘉泰姆
- Using Sense Low-Side MOSFET’s RDS(ON)r5b嘉泰姆
Over-Temperature Protectionr5b嘉泰姆
4mmx4mm Thin QFN-24 (TQFN4x4-24A) packager5b嘉泰姆
Lead Free and Green Device Available (RoHS Compliant)r5b嘉泰姆

三,应用范围 (Applications)r5b嘉泰姆

Notebook and Sub-Notebook Computersr5b嘉泰姆

Portable Devicesr5b嘉泰姆
DDR1, DDR2, and DDR3 Power Suppliesr5b嘉泰姆
3-Cell and 4-Cell Li+ Battery-Powered Devicesr5b嘉泰姆
Graphic Cardsr5b嘉泰姆
Game Consolesr5b嘉泰姆
Telecommunicationsr5b嘉泰姆

四.下载产品资料PDF文档 r5b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！r5b嘉泰姆

QQ截图20160419174301.jpg r5b嘉泰姆

五,产品封装图 (Package)r5b嘉泰姆

r5b嘉泰姆

六.电路原理图r5b嘉泰姆

r5b嘉泰姆

七,功能概述r5b嘉泰姆

Input Capacitor Selectionr5b嘉泰姆
The input capacitor is chosen based on the voltage rating and the RMS current rating. For reliable operation, selectr5b嘉泰姆
the capacitor voltage rating to be at least 1.3 times higher than the maximum input voltage. The maximum RMSr5b嘉泰姆
current rating requirement is approximately IOUT/2, where IOUT is the load current. During power up, the input capaci-tors have to handle large amount of surge current. In low-duty notebook appliactions, ceramic capacitors arer5b嘉泰姆
remmended. The capacitors must be connected between the drain of high-side MOSFET and the source of low-r5b嘉泰姆
side MOSFET with very low-impeadance PCB layout. r5b嘉泰姆
MOSFET Selectionr5b嘉泰姆
The application for a notebook battery with a maximum volt-age of 24V, at least a minimum 30V MOSFETs shouldr5b嘉泰姆
be used. The design has to trade off the gate charge with the RDS(ON) of the MOSFET:r5b嘉泰姆
· For the low-side MOSFET, before it is turned on, the body diode has been conducted. The low-side MOSFETr5b嘉泰姆
driver will not charge the miller capacitor of this MOSFET.r5b嘉泰姆
In the turning off process of the low-side MOSFET,the load current will shift to the body diode first. Ther5b嘉泰姆
high dv/dt of the phase node voltage will charge the miller capacitor through the low-side MOSFET driverr5b嘉泰姆
sinking current path. This results in much less switching loss of the low-side MOSFETs. The dutyr5b嘉泰姆
cycle is often very small in high battery voltage applications, and the low-side MOSFET will con-r5b嘉泰姆
duct most of the switching cycle; therefore, the less the RDS(ON) of the low-side MOSFET, the less the powerr5b嘉泰姆
loss. The gate charge for this MOSFET is usually a secondary consideration. The high-side MOSFETr5b嘉泰姆
does not have this zero voltage switching condition, and because it conducts for less timer5b嘉泰姆
compared to the low-side MOSFET, the switching loss tends to be dominant. Priority should be givenr5b嘉泰姆
to the MOSFETs with less gate charge, so that both the gate driver loss and switching loss will be minimized.r5b嘉泰姆
The selection of the N-channel power MOSFETs are de-termined by the RDS(ON), reversing transfer capacitancer5b嘉泰姆
(CRSS) and maximum output current requirement. The losses in the MOSFETs have two components: conduc-r5b嘉泰姆
tion loss and transition loss. For the high-side and low-side MOSFETs, the losses are approximately given byr5b嘉泰姆
the following equations:r5b嘉泰姆
Layout Considerationr5b嘉泰姆
In any high switching frequency converter, a correct layout is important to ensure proper operation of the regulator.r5b嘉泰姆
With power devices switching at higher frequency, the resulting current transient will cause voltage spike acrossr5b嘉泰姆
the interconnecting impedance and parasitic circuit elements. As an example, consider the turn-off transitionr5b嘉泰姆
of the PWM MOSFET. Before turn-off condition, the MOSFET is carrying the full load current. During turn-off,r5b嘉泰姆
current stops flowing in the MOSFET and is freewheeling by the lower MOSFET and parasitic diode. Any parasiticr5b嘉泰姆
inductance of the circuit generates a large voltage spike during the switching interval. In general, using short andr5b嘉泰姆
wide printed circuit traces should minimize interconnect-ing impedances and the magnitude of voltage spike. Andr5b嘉泰姆
signal and power grounds are to be kept separating and finally combined to use the ground plane construction orr5b嘉泰姆

single point grounding. The best tie-point between the signal ground and the power ground is at the negativer5b嘉泰姆
side of the output capacitor on each channel, where there is less noise. Noisy traces beneath the IC are notr5b嘉泰姆
recommended. Below is a checklist for your layout:r5b嘉泰姆
Layout Consideration (Cont.)r5b嘉泰姆
Keep the switching nodes (UGATEx, LGATEx, BOOTx,and PHASEx) away from sensitive small signal nodesr5b嘉泰姆
(REF, ILIMx, and FBx) since these nodes are fast mov-ing signals. Therefore, keep traces to these nodes asr5b嘉泰姆
short as possible and there should be no other weak signal traces in parallel with theses traces on any layer.r5b嘉泰姆

Minimizing the impedance with wide layout plane be-tween the two pads reduces the voltage bounce ofr5b嘉泰姆

CXSD62104r5b嘉泰姆

八,相关产品 更多同类产品...... r5b嘉泰姆

Switching Regulator > Buck Controllerr5b嘉泰姆
Part_No r5b嘉泰姆	Package r5b嘉泰姆	Archir5b嘉泰姆 tectur5b嘉泰姆	Phaser5b嘉泰姆	No.ofr5b嘉泰姆 PWMr5b嘉泰姆 Outputr5b嘉泰姆	Output r5b嘉泰姆 Currentr5b嘉泰姆 (A) r5b嘉泰姆	Inputr5b嘉泰姆 Voltage (V) r5b嘉泰姆		Referencer5b嘉泰姆 Voltager5b嘉泰姆 (V) r5b嘉泰姆	Bias r5b嘉泰姆 Voltager5b嘉泰姆 (V) r5b嘉泰姆	Quiescentr5b嘉泰姆 Currentr5b嘉泰姆 (uA) r5b嘉泰姆
Part_No r5b嘉泰姆	Package r5b嘉泰姆	Archir5b嘉泰姆 tectur5b嘉泰姆	Phaser5b嘉泰姆	No.ofr5b嘉泰姆 PWMr5b嘉泰姆 Outputr5b嘉泰姆	Output r5b嘉泰姆 Currentr5b嘉泰姆 (A) r5b嘉泰姆	minr5b嘉泰姆	maxr5b嘉泰姆	Referencer5b嘉泰姆 Voltager5b嘉泰姆 (V) r5b嘉泰姆	Bias r5b嘉泰姆 Voltager5b嘉泰姆 (V) r5b嘉泰姆	Quiescentr5b嘉泰姆 Currentr5b嘉泰姆 (uA) r5b嘉泰姆
CXSD6273r5b嘉泰姆	SOP-14r5b嘉泰姆 QSOP-16r5b嘉泰姆 QFN4x4-16r5b嘉泰姆	VM r5b嘉泰姆	1 r5b嘉泰姆	1 r5b嘉泰姆	30r5b嘉泰姆	2.9 r5b嘉泰姆	13.2r5b嘉泰姆	0.9r5b嘉泰姆	12 r5b嘉泰姆	8000r5b嘉泰姆
CXSD6274r5b嘉泰姆	SOP-8r5b嘉泰姆	VM r5b嘉泰姆	1r5b嘉泰姆	1r5b嘉泰姆	20r5b嘉泰姆	2.9 r5b嘉泰姆	13.2 r5b嘉泰姆	0.8r5b嘉泰姆	12r5b嘉泰姆	5000r5b嘉泰姆
CXSD6274Cr5b嘉泰姆	SOP-8r5b嘉泰姆	VMr5b嘉泰姆	1r5b嘉泰姆	1r5b嘉泰姆	20r5b嘉泰姆	2.9r5b嘉泰姆	13.2r5b嘉泰姆	0.8r5b嘉泰姆	12r5b嘉泰姆	5000r5b嘉泰姆
CXSD6275r5b嘉泰姆	QFN4x4-24r5b嘉泰姆	VMr5b嘉泰姆	2r5b嘉泰姆	1r5b嘉泰姆	60r5b嘉泰姆	3.1r5b嘉泰姆	13.2r5b嘉泰姆	0.6r5b嘉泰姆	12r5b嘉泰姆	5000r5b嘉泰姆
CXSD6276r5b嘉泰姆	SOP-8r5b嘉泰姆	VMr5b嘉泰姆	1r5b嘉泰姆	1r5b嘉泰姆	20r5b嘉泰姆	2.2r5b嘉泰姆	13.2r5b嘉泰姆	0.8r5b嘉泰姆	5~12r5b嘉泰姆	2100r5b嘉泰姆
CXSD6276Ar5b嘉泰姆	SOP-8r5b嘉泰姆	VMr5b嘉泰姆	1r5b嘉泰姆	1r5b嘉泰姆	20r5b嘉泰姆	2.2r5b嘉泰姆	13.2r5b嘉泰姆	0.8r5b嘉泰姆	5~12r5b嘉泰姆	2100r5b嘉泰姆
CXSD6277/A/Br5b嘉泰姆	SOP8\|TSSOP8r5b嘉泰姆	VMr5b嘉泰姆	1r5b嘉泰姆	1r5b嘉泰姆	5r5b嘉泰姆	5r5b嘉泰姆	13.2r5b嘉泰姆	1.25\|0.8r5b嘉泰姆	5~12r5b嘉泰姆	3000r5b嘉泰姆
CXSD6278r5b嘉泰姆	SOP-8r5b嘉泰姆	VMr5b嘉泰姆	1r5b嘉泰姆	1r5b嘉泰姆	10r5b嘉泰姆	3.3r5b嘉泰姆	5.5r5b嘉泰姆	0.8r5b嘉泰姆	5r5b嘉泰姆	2100r5b嘉泰姆
CXSD6279Br5b嘉泰姆	SOP-14r5b嘉泰姆	VM r5b嘉泰姆	1r5b嘉泰姆	1r5b嘉泰姆	10r5b嘉泰姆	5r5b嘉泰姆	13.2r5b嘉泰姆	0.8r5b嘉泰姆	12r5b嘉泰姆	2000r5b嘉泰姆
CXSD6280r5b嘉泰姆	TSSOP-24r5b嘉泰姆 \|QFN5x5-32r5b嘉泰姆	VMr5b嘉泰姆	1r5b嘉泰姆	2r5b嘉泰姆	20r5b嘉泰姆	5r5b嘉泰姆	13.2r5b嘉泰姆	0.6r5b嘉泰姆	5~12r5b嘉泰姆	4000r5b嘉泰姆
CXSD6281Nr5b嘉泰姆	SOP14r5b嘉泰姆 QSOP16r5b嘉泰姆 QFN-16r5b嘉泰姆	VMr5b嘉泰姆	1r5b嘉泰姆	1r5b嘉泰姆	30r5b嘉泰姆	2.9r5b嘉泰姆	13.2r5b嘉泰姆	0.9r5b嘉泰姆	12r5b嘉泰姆	4000r5b嘉泰姆
CXSD6282r5b嘉泰姆	SOP-14r5b嘉泰姆	VMr5b嘉泰姆	1r5b嘉泰姆	1r5b嘉泰姆	30r5b嘉泰姆	2.2r5b嘉泰姆	13.2r5b嘉泰姆	0.6r5b嘉泰姆	12r5b嘉泰姆	5000r5b嘉泰姆
CXSD6282Ar5b嘉泰姆	SOP-14r5b嘉泰姆	VMr5b嘉泰姆	1r5b嘉泰姆	1r5b嘉泰姆	30r5b嘉泰姆	2.2r5b嘉泰姆	13.2r5b嘉泰姆	0.6r5b嘉泰姆	12r5b嘉泰姆	5000r5b嘉泰姆
CXSD6283r5b嘉泰姆	SOP-14r5b嘉泰姆	VMr5b嘉泰姆	1r5b嘉泰姆	1r5b嘉泰姆	25r5b嘉泰姆	2.2r5b嘉泰姆	13.2r5b嘉泰姆	0.8r5b嘉泰姆	12r5b嘉泰姆	5000r5b嘉泰姆
CXSD6284/Ar5b嘉泰姆	LQFP7x7 48r5b嘉泰姆 TQFN7x7-48r5b嘉泰姆	VMr5b嘉泰姆	1r5b嘉泰姆	6r5b嘉泰姆	0.015r5b嘉泰姆	1.4r5b嘉泰姆	6.5r5b嘉泰姆	-r5b嘉泰姆	5r5b嘉泰姆	1800r5b嘉泰姆
CXSD6285r5b嘉泰姆	TSSOP-24Pr5b嘉泰姆	VMr5b嘉泰姆	1r5b嘉泰姆	2r5b嘉泰姆	20r5b嘉泰姆	2.97r5b嘉泰姆	5.5r5b嘉泰姆	0.8r5b嘉泰姆	5~12r5b嘉泰姆	5000r5b嘉泰姆
r5b嘉泰姆

上一篇：两相电压模式和固定频率降压控制器CXSD62103从100kHz到800kHz的可编程脉宽调制开关频率无损耗低边MOSFET Ron电流传感

下一篇：电荷泵CXSD62105笔记本电脑的系统电源脉宽调制控制器集成了双降压恒时同步的脉宽调制控制器

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