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参数资料
| 型号： | MAX15023EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 22/28页 |
| 文件大小： | 0K |
| 描述： | KIT EVALUATION FOR MAX15023 CTLR |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 2，非隔离 |
| 输出电压： | 1.2V，3.3V |
| 电流 - 输出： | 10A，5A |
| 输入电压： | 9 ~ 16 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 500kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX15023 |
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MAX15023
Wide 4.5V to 28V Input, Dual-Output
Synchronous Buck Controller
4) Place the second zero (f Z2 ) at 0.2 x f O or at f PO ,
whichever is lower and calculate R 1 using the fol-
lowing equation:
All four n-channel MOSFETs must be a logic-level type
with guaranteed on-resistance specifications at V GS =
4.5V. For maximum efficiency, choose a high-side
MOSFET (NH_) that has conduction losses equal to the
R 1 =
1
2 π × f Z 2 × C I
? R I
switching losses at the typical input voltage. Ensure
that the conduction losses at minimum input voltage do
not exceed MOSFET package thermal limits, or violate
5) Place the third pole (f P3 ) at half the switching fre-
quency and calculate C CF :
the overall thermal budget. Also, ensure that the con-
duction losses plus switching losses at the maximum
input voltage do not exceed package ratings or violate
C CF =
C F
( 2 π × 0 . 5 × f SW × R F × C F ) ? 1
the overall thermal budget. Ensure that the MAX15023
DL_ gate drivers can drive a low-side MOSFET (NL_).
In particular, check that the dV/dt caused by NH_ turn-
6) Calculate R 2 as:
ing on does not pull up the NL_ gate through NL_’s
drain-to-gate capacitance. This is the most frequent
R 2 =
V FB
V OUT ? V FB
× R 1
cause of cross-conduction problems.
Gate-charge losses are dissipated by the driver and do
not heat the MOSFET. Therefore, if the drive current is
MOSFET Selection
The MAX15023’s step-down controller drives two exter-
nal logic-level n-channel MOSFETs as the circuit switch
elements. The key selection parameters to choose
these MOSFETs include:
? On-resistance (R DS(ON) )
? Maximum drain-to-source voltage (V DS(MAX) )
? Minimum threshold voltage (V TH(MIN) )
? Total gate charge (Qg)
? Reverse transfer capacitance (C RSS )
? Power dissipation
taken from the internal LDO regulator, the power dissi-
pation due to drive losses must be checked. All
MOSFETs must be selected so that their total gate
charge is low enough; therefore, V CC can power all four
drivers without overheating the IC:
P DRIVE = V IN × Q G _ TOTAL × f SW
where Q G_TOTAL is the sum of the gate charges of all
four MOSFETs.
Power Dissipation
Device’s maximum power dissipation depends on the
thermal resistance from the die to the ambient environ-
ment and the ambient temperature. The thermal resis-
tance depends on the device package, PCB copper
area, other thermal mass, and airflow.
V OUT
R F
C CF
C F
The power dissipated into the package (P T ) depends on
the supply configuration (see the Typical Application
Circuits). It can be calculated using the following equation:
R I
C I
R 1
P T = V IN x I IN
For the circuits of Figures 7 and 8:
P T = V CC x (I IN + I VCC )
where V IN and V CC are the voltages at the respective
g m
COMP
pins, I IN is the current at the input of the internal LDO
(I IN is practically zero for the circuits of Figures 7 and
R 2
V REF
8), I VCC is the current consumed by the internal core
and drivers when the internal regulator is unused for 5V
supply operation (IN = V CC ). See the corresponding
Typical Operating Characteristics for the typical curves
Figure 5. Type III Compensation Network
22
of I IN and I VCC current consumption vs. operating fre-
quency at various load capacitance values.
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15023EVKIT+ | 功能描述:电源管理IC开发工具 MAX15023 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX15024AATB/V+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX15024AATB/V+T | 功能描述:功率驱动器IC Single Low Side 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 |
| MAX15024AATB+ | 制造商:Maxim Integrated Products 功能描述:SINGLE/DUAL, 16NS, HIGH SINK/SOURCE CURRENT GATE DRIVERS - Rail/Tube |
| MAX15024AATB+T | 功能描述:功率驱动器IC Single Low Side 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 |
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