CXSD62104

CXSD62104集成了双降压、恒定时间、同步PWM控制器(为每个通道驱动双N通道mosfet)和
两个低损耗稳压器以及各种保护装置集成到一个芯片中。PWM控制器降低电池的高电压以产生NB的低电压应用。PWM1和PWM2的输出可以从2V调整到5.5V通过设置一个从VOUTx到GND的电阻分压器。线性调节器为备用电源提供5V和3.3V输出

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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产品简介

目录oIa嘉泰姆

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

一,产品概述(General Description)         oIa嘉泰姆

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

三,应用范围 (Applications)oIa嘉泰姆

Notebook and Sub-Notebook ComputersoIa嘉泰姆

Portable DevicesoIa嘉泰姆
DDR1, DDR2, and DDR3 Power SuppliesoIa嘉泰姆
3-Cell and 4-Cell Li+ Battery-Powered DevicesoIa嘉泰姆
Graphic CardsoIa嘉泰姆
Game ConsolesoIa嘉泰姆
Telecommunications
oIa嘉泰姆

四.下载产品资料PDF文档 oIa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oIa嘉泰姆

 QQ截图20160419174301.jpgoIa嘉泰姆

五,产品封装图 (Package)oIa嘉泰姆


blob.pngblob.pngoIa嘉泰姆

六.电路原理图oIa嘉泰姆


blob.pngoIa嘉泰姆

七,功能概述oIa嘉泰姆


Input Capacitor SelectionoIa嘉泰姆
The input capacitor is chosen based on the voltage rating and the RMS current rating. For reliable operation, selectoIa嘉泰姆
the capacitor voltage rating to be at least 1.3 times higher than the maximum input voltage. The maximum RMSoIa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 areoIa嘉泰姆
remmended. The capacitors must be connected between the drain of high-side MOSFET and the source of low-oIa嘉泰姆
side MOSFET with very low-impeadance PCB layout. oIa嘉泰姆
MOSFET SelectionoIa嘉泰姆
The application for a notebook battery with a maximum volt-age of 24V, at least a minimum 30V MOSFETs shouldoIa嘉泰姆
be used. The design has to trade off the gate charge with the RDS(ON) of the MOSFET:oIa嘉泰姆
· For the low-side MOSFET, before it is turned on, the body diode has been conducted. The low-side MOSFEToIa嘉泰姆
driver will not charge the miller capacitor of this MOSFET.oIa嘉泰姆
In the turning off process of the low-side MOSFET,the load current will shift to the body diode first. TheoIa嘉泰姆
high dv/dt of the phase node voltage will charge the miller capacitor through the low-side MOSFET driveroIa嘉泰姆
sinking current path. This results in much less switching loss of the low-side MOSFETs. The dutyoIa嘉泰姆
cycle is often very small in high battery voltage applications, and the low-side MOSFET will con-oIa嘉泰姆
duct most of the switching cycle; therefore, the less the RDS(ON) of the low-side MOSFET, the less the poweroIa嘉泰姆
loss. The gate charge for this MOSFET is usually a secondary consideration. The high-side MOSFEToIa嘉泰姆
does not have this zero voltage switching condition, and because it conducts for less timeoIa嘉泰姆
compared to the low-side MOSFET, the switching loss tends to be dominant. Priority should be givenoIa嘉泰姆
to the MOSFETs with less gate charge, so that both the gate driver loss and switching loss will be minimized.oIa嘉泰姆
The selection of the N-channel power MOSFETs are de-termined by the RDS(ON), reversing transfer capacitanceoIa嘉泰姆
(CRSS) and maximum output current requirement. The losses in the MOSFETs have two components: conduc-oIa嘉泰姆
tion loss and transition loss. For the high-side and low-side MOSFETs, the losses are approximately given byoIa嘉泰姆
the following equations:oIa嘉泰姆
Layout ConsiderationoIa嘉泰姆
In any high switching frequency converter, a correct layout is important to ensure proper operation of the regulator.oIa嘉泰姆
With power devices switching at higher frequency, the resulting current transient will cause voltage spike acrossoIa嘉泰姆
the interconnecting impedance and parasitic circuit elements. As an example, consider the turn-off transitionoIa嘉泰姆
of the PWM MOSFET. Before turn-off condition, the MOSFET is carrying the full load current. During turn-off,oIa嘉泰姆
current stops flowing in the MOSFET and is freewheeling by the lower MOSFET and parasitic diode. Any parasiticoIa嘉泰姆
inductance of the circuit generates a large voltage spike during the switching interval. In general, using short andoIa嘉泰姆
wide printed circuit traces should minimize interconnect-ing impedances and the magnitude of voltage spike. AndoIa嘉泰姆
signal and power grounds are to be kept separating and finally combined to use the ground plane construction oroIa嘉泰姆

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

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

CXSD62104oIa嘉泰姆

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1oIa嘉泰姆

40oIa嘉泰姆

4.5oIa嘉泰姆

13.2oIa嘉泰姆

0.6oIa嘉泰姆

5~12oIa嘉泰姆

4000oIa嘉泰姆

CXSD6295oIa嘉泰姆

SOP8PoIa嘉泰姆

TDFN3x3-10oIa嘉泰姆

VMoIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

20oIa嘉泰姆

3oIa嘉泰姆

13.2oIa嘉泰姆

0.8oIa嘉泰姆

5~12oIa嘉泰姆

2500oIa嘉泰姆

CXSD6296A|B|C|DoIa嘉泰姆

SOP8PoIa嘉泰姆

VMoIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

25oIa嘉泰姆

3oIa嘉泰姆

13.2oIa嘉泰姆

0.6|0.8oIa嘉泰姆

5~12oIa嘉泰姆

1200oIa嘉泰姆

CXSD6297oIa嘉泰姆

TDFN3x3-10oIa嘉泰姆

VMoIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

25oIa嘉泰姆

4oIa嘉泰姆

13.2oIa嘉泰姆

0.8oIa嘉泰姆

5~12oIa嘉泰姆

2000oIa嘉泰姆

CXSD6298oIa嘉泰姆

TDFN3x3-10oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

25oIa嘉泰姆

4.5oIa嘉泰姆

25oIa嘉泰姆

0.6oIa嘉泰姆

5~12oIa嘉泰姆

80oIa嘉泰姆

CXSD6299|AoIa嘉泰姆

SOP-8PoIa嘉泰姆

VMoIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

25oIa嘉泰姆

4.5oIa嘉泰姆

13.2oIa嘉泰姆

0.8oIa嘉泰姆

5~12oIa嘉泰姆

16000oIa嘉泰姆

CXSD62100oIa嘉泰姆

TQFN3x3-10oIa嘉泰姆

VMoIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

25oIa嘉泰姆

4.5oIa嘉泰姆

13.2oIa嘉泰姆

0.6oIa嘉泰姆

5~12oIa嘉泰姆

2500oIa嘉泰姆

CXSD62101|LoIa嘉泰姆

TDFN3x3-10oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

30oIa嘉泰姆

3oIa嘉泰姆

25oIa嘉泰姆

0.8oIa嘉泰姆

5~12oIa嘉泰姆

2000oIa嘉泰姆

CXSD62102oIa嘉泰姆

TQFN3x3-16oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

30oIa嘉泰姆

1.8oIa嘉泰姆

28oIa嘉泰姆

0.6oIa嘉泰姆

5oIa嘉泰姆

600oIa嘉泰姆

CXSD62102AoIa嘉泰姆

TQFN 3x3 16oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

30oIa嘉泰姆

1.8oIa嘉泰姆

28oIa嘉泰姆

0.6oIa嘉泰姆

5oIa嘉泰姆

600oIa嘉泰姆

CXSD62103oIa嘉泰姆

QFN4x4-24oIa嘉泰姆

VMoIa嘉泰姆

2oIa嘉泰姆

1oIa嘉泰姆

50oIa嘉泰姆

4.5oIa嘉泰姆

13.2oIa嘉泰姆

0.6oIa嘉泰姆

5~12oIa嘉泰姆

5000oIa嘉泰姆

CXSD62104oIa嘉泰姆

TQFN4x4-24oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

2oIa嘉泰姆

15oIa嘉泰姆

6oIa嘉泰姆

25oIa嘉泰姆

2oIa嘉泰姆

NoIa嘉泰姆

550oIa嘉泰姆

CXSD62105oIa嘉泰姆

TQFN4x4-24oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

2oIa嘉泰姆

15oIa嘉泰姆

6oIa嘉泰姆

25oIa嘉泰姆

2oIa嘉泰姆

NoIa嘉泰姆

550oIa嘉泰姆

CXSD62106|AoIa嘉泰姆

TQFN4x4-4oIa嘉泰姆

TQFN3x3-20oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

2oIa嘉泰姆

20oIa嘉泰姆

3oIa嘉泰姆

28oIa嘉泰姆

0.75oIa嘉泰姆

5oIa嘉泰姆

800oIa嘉泰姆

CXSD62107oIa嘉泰姆

TQFN3x3-16oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

20oIa嘉泰姆

1.8oIa嘉泰姆

28oIa嘉泰姆

0.75oIa嘉泰姆

5oIa嘉泰姆

400oIa嘉泰姆

CXSD62108oIa嘉泰姆

QFN3.5x3.5-14oIa嘉泰姆

TQFN3x3-16oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

20oIa嘉泰姆

1.8oIa嘉泰姆

28oIa嘉泰姆

0.75oIa嘉泰姆

5oIa嘉泰姆

400oIa嘉泰姆

CXSD62109oIa嘉泰姆

TQFN3x3-16oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

2oIa嘉泰姆

20oIa嘉泰姆

1.8oIa嘉泰姆

28oIa嘉泰姆

0.75oIa嘉泰姆

5oIa嘉泰姆

400oIa嘉泰姆

CXSD62110oIa嘉泰姆

QFN3x3-20oIa嘉泰姆

TQFN3x3-16oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

2oIa嘉泰姆

20oIa嘉泰姆

3oIa嘉泰姆

28oIa嘉泰姆

1.8|1.5|0.5oIa嘉泰姆

5oIa嘉泰姆

740oIa嘉泰姆

CXSD62111oIa嘉泰姆

TQFN4x4-24oIa嘉泰姆

|QFN3x3-20oIa嘉泰姆

CMoIa嘉泰姆

1oIa嘉泰姆

2oIa嘉泰姆

15oIa嘉泰姆

5oIa嘉泰姆

28oIa嘉泰姆

0.5oIa嘉泰姆

NoIa嘉泰姆

3000oIa嘉泰姆

CXSD62112oIa嘉泰姆

TDFN3x3-10oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

20oIa嘉泰姆

1.8oIa嘉泰姆

28oIa嘉泰姆

0.5oIa嘉泰姆

5oIa嘉泰姆

250oIa嘉泰姆

CXSD62113|CoIa嘉泰姆

TQFN3x3-20oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

2oIa嘉泰姆

15oIa嘉泰姆

6oIa嘉泰姆

25oIa嘉泰姆

2oIa嘉泰姆

NoIa嘉泰姆

550oIa嘉泰姆

CXSD62113EoIa嘉泰姆

TQFN 3x3 20oIa嘉泰姆

COToIa嘉泰姆

2oIa嘉泰姆

2oIa嘉泰姆

11oIa嘉泰姆

6oIa嘉泰姆

25oIa嘉泰姆

2oIa嘉泰姆

NoIa嘉泰姆

550oIa嘉泰姆

CXSD62114oIa嘉泰姆

TQFN3x3-20oIa嘉泰姆

COToIa嘉泰姆

2oIa嘉泰姆

2oIa嘉泰姆

11oIa嘉泰姆

5.5oIa嘉泰姆

25oIa嘉泰姆

2oIa嘉泰姆

NoIa嘉泰姆

280oIa嘉泰姆

CXSD62115oIa嘉泰姆

QFN4x4-24oIa嘉泰姆

VMoIa嘉泰姆

2oIa嘉泰姆

1oIa嘉泰姆

60oIa嘉泰姆

3.1oIa嘉泰姆

13.2oIa嘉泰姆

0.85oIa嘉泰姆

12oIa嘉泰姆

5000oIa嘉泰姆

CXSD62116A|B|CoIa嘉泰姆

SOP-8PoIa嘉泰姆

VMoIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

20oIa嘉泰姆

2.9oIa嘉泰姆

13.2oIa嘉泰姆

0.8oIa嘉泰姆

12oIa嘉泰姆

16000oIa嘉泰姆

CXSD62117oIa嘉泰姆

SOP-20oIa嘉泰姆

VMoIa嘉泰姆

2oIa嘉泰姆

2oIa嘉泰姆

30oIa嘉泰姆

10oIa嘉泰姆

13.2oIa嘉泰姆

1oIa嘉泰姆

12oIa嘉泰姆

5000oIa嘉泰姆

CXSD62118oIa嘉泰姆

TDFN3x3-10oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

1oIa嘉泰姆

25oIa嘉泰姆

1.8oIa嘉泰姆

28oIa嘉泰姆

0.7oIa嘉泰姆

5oIa嘉泰姆

250oIa嘉泰姆

CXSD62119oIa嘉泰姆

TQFN3x3-20oIa嘉泰姆

COToIa嘉泰姆

2oIa嘉泰姆

1oIa嘉泰姆

40oIa嘉泰姆

1.8oIa嘉泰姆

25oIa嘉泰姆

REFIN SettingoIa嘉泰姆

5oIa嘉泰姆

700oIa嘉泰姆

CXSD62120oIa嘉泰姆

QFN 3x3 20oIa嘉泰姆

TQFN 3x3 16oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

2oIa嘉泰姆

20oIa嘉泰姆

3oIa嘉泰姆

28oIa嘉泰姆

1.8|1.5 1.35|1.2 0.5oIa嘉泰姆

5oIa嘉泰姆

800oIa嘉泰姆

CXSD62121AoIa嘉泰姆

TQFN3x3 20oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

2oIa嘉泰姆

15oIa嘉泰姆

3oIa嘉泰姆

28oIa嘉泰姆

0.75oIa嘉泰姆

5oIa嘉泰姆

220oIa嘉泰姆

CXSD62121BoIa嘉泰姆

TQFN3x3 20oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

2oIa嘉泰姆

15oIa嘉泰姆

3oIa嘉泰姆

28oIa嘉泰姆

0.75oIa嘉泰姆

5oIa嘉泰姆

220oIa嘉泰姆

CXSD62121oIa嘉泰姆

TQFN3x3-20oIa嘉泰姆

COToIa嘉泰姆

1oIa嘉泰姆

2oIa嘉泰姆

20oIa嘉泰姆

3oIa嘉泰姆

28oIa嘉泰姆

0.75oIa嘉泰姆

5oIa嘉泰姆

180oIa嘉泰姆

 oIa嘉泰姆

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