- 您现在的位置：买卖IC网 > PDF目录15149 > MAX5061EUE+T (Maxim Integrated Products)IC REG CTRLR BUCK PWM CM 16TSSOP PDF资料下载
参数资料
| 型号： | MAX5061EUE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 25/31页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 16TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1.5MHz |
| 占空比： | 90% |
| 电源电压： | 4.75 V ~ 28 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页当前第25页第26页第27页第28页第29页第30页第31页
0.6V to 5.5V Output, Parallelable,
Average-Current-Mode DC-DC Controllers
( I DC + I PK + I )
I RMS ? HI =
DC PK ×
× I
( ? V ESR )
ESR IN =
? I OUT +
? ? I L ?
?
2 ?
I OUT × D ( 1 ? D )
C IN =
2 2 D
3
where D = V OUT /V IN , I DC = (I OUT - ? I L /2) and I PK =
(I OUT + ? I L /2).
PD MOS ? LO = ( Q G × V DD × f SW ) +
?
? V Q × f SW
where I OUT is the output current of the converter.
? 2 × C
(
× V 2 × f
?
? + 1 . 4 R DS ( ON ) × I RMS ? LO
?
?
?
( I DC + I PK + I
)
2 2 ( 1 ? D )
I RMS ? LO = DC × I PK ×
3
OSS IN SW 2
3
)
For example, at V OUT = 1.8V, the ESR and input capac-
itance are calculated for the input peak-to-peak ripple
of 100mV or less yielding an ESR and capacitance
value of 1.25m ? and 110μF.
Output Capacitors
The worst-case peak-to-peak and capacitor RMS ripple
? V OESR
? I L
C OUT =
where C OSS is the MOSFET drain-to-source capaci-
tance.
For example, from the typical specifications in the
Applications Information section with V OUT = 1.8V, the
high-side and low-side MOSFET RMS currents are 7.8A
and 18.5A, respectively for 20A. Ensure that the ther-
mal impedance of the MOSFET package keeps the
junction temperature at least +25°C below the absolute
maximum rating. Use the following equation to calcu-
late maximum junction temperature:
T J = (PD MOS x θ JA ) + T A
where θ JA and T A are the junction-to-ambient thermal
impedance and ambient temperature, respectively.
Input Capacitors
The discontinuous input-current waveform of the buck
converter causes large ripple currents in the input capac-
itor. The switching frequency, peak inductor current, and
the allowable peak-to-peak voltage ripple reflected back
to the source dictate the capacitance requirement.
Increasing switching frequency or paralleling multiple out-
of-phase converters lowers the peak-to-average current
ratio, yielding a lower input capacitance requirement for
the same load current.
The input ripple is comprised of ? V Q (caused by the
capacitor discharge) and ? V ESR (caused by the ESR of
the capacitor). Use low-ESR ceramic capacitors with
high-ripple-current capability at the input. Assume the
contributions from the ESR and capacitor discharge are
equal to 30% and 70%, respectively. Calculate the input
capacitance and ESR required for a specified ripple
using the following equation:
current, the allowable peak-to-peak output ripple volt-
age, and the maximum deviation of the output voltage
during step loads determine the capacitance and the
ESR requirements for the output capacitors.
In buck converter design, the output-current waveform
is continuous and this reduces peak-to-peak ripple cur-
rent in the output capacitor equal to the inductor ripple
current. Calculate the capacitance, the ESR of the out-
put capacitor, and the RMS ripple current rating of the
output capacitor based on the following equations.
ESR OUT =
? I L
8 × ? V OQ × f SW
where ? V OESR and ? V OQ are the output-ripple contri-
butions due to ESR and the discharge of output capaci-
tor, respectively.
In the dynamic load environment, the allowable devia-
tion of output voltage during the fast transient load dic-
tates the output capacitance and ESR. The output
capacitors supply the load step until the controller
responds with a greater duty cycle. The response time
(t RESPONSE ) depends on the closed-loop bandwidth of
the converter. The resistive drop across the capacitor
ESR and capacitor discharge causes a voltage drop
during a step load. Use a combination of SP polymer
and ceramic capacitors for better transient load and
ripple/noise performance.
______________________________________________________________________________________
25
相关PDF资料 |
PDF描述 |
|---|---|
| VI-24F-EW-F4 | CONVERTER MOD DC/DC 72V 100W |
| MAX5061AUE+T | IC REG CTRLR BUCK PWM CM 16TSSOP |
| MAX15005AAUE/V+T | IC REG CTRLR PWM CM 16-TSSOP |
| MAX5975BETE+T | IC REG CTRLR FLYBK ISO CM 16TQFN |
| H2BBG-10103-Y4-ND | JUMPER-H1501TR/A2015Y/H1501TR 3" |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5062 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:125V/2A, High-Speed, Half-Bridge MOSFET Drivers |
| MAX5062_07 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:125V/2A, High-Speed, Half-Bridge MOSFET Drivers |
| MAX5062AASA | 功能描述:功率驱动器IC 125V 2A Half-Bridge MOSFET Driver RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX5062AASA+ | 功能描述:功率驱动器IC 125V 2A Half-Bridge MOSFET Driver RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX5062AASA+T | 功能描述:功率驱动器IC 125V 2A Half-Bridge MOSFET Driver RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。