- 您现在的位置：买卖IC网 > PDF目录14390 > MAX5099ATJ+ (Maxim Integrated Products)IC REG BUCK SYNC ADJ DL 32TQFN PDF资料下载
参数资料
| 型号： | MAX5099ATJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 20/27页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ DL 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 17.1 V |
| 输入电压： | 4.5 V ~ 19 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 200kHz ~ 2.2MHz |
| 电流 - 输出： | 1A，2A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
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页当前第20页第21页第22页第23页第24页第25页第26页第27页
Dual, 2.2MHz, Automotive Synchronous Buck
Converter with 80V Load-Dump Protection
where
where
( V IN ? V DS ) × D
Δ I L =
Δ I L
I PK = I O +
L × f SW
where V DS is the voltage drop across the internal MOSFET
switch. Δ I L is the peak-to-peak inductor ripple current
as calculated above. Δ V Q is the portion of input ripple
due to the capacitor discharge, and Δ V ESR is the con-
P SW =
I DC = I O ?
2
Δ I L
2
V IN × I O × ( t R + t F ) × f SW
4
tribution due to ESR of the capacitor.
Output Capacitor
For the boost converter, the output capacitor supplies
the load current when the main switch is on. The
See the Electrical Characteristics table for the
R ON(MAX) maximum value.
For the boost converter:
Δ V ESR
C OUT =
( I 2 DC PK + ( I DC PK I × ) ) × D MAX
I IN = O O
( V IN ? V DS ) × D
Δ I L =
I DC = I IN ?
Δ I L
required output capacitance is high, especially at high-
er duty cycles. Also, the output capacitor ESR needs to
be low enough to minimize the voltage drop due to the
ESR while supporting the load current. Use the follow-
ing equation to calculate the output capacitor for a
specified output ripple tolerance:
ESR =
I PK
I O × D MAX
Δ V Q × f SW
where I PK is the peak inductor current as defined in the
following Power Dissipation section, I O is the load cur-
I RMS =
+ I 2
V × I
V I N × η
L × f SW
Δ I L
2
I PK = I IN +
2
P DC = I RMS 2 × R ON ( MAX )
3
rent, Δ V Q is the portion of the ripple due to the capaci-
tor discharge, and Δ V ESR is the contribution due to the
ESR of the capacitor. D MAX is the maximum duty cycle
at minimum input voltage.
where V DS is the drop across the internal MOSFET and
η is the efficiency. See the Electrical Characteristics
table for the R ON(MAX) value.
Power Dissipation
The MAX5099 includes two internal power MOSFET
switches. The DC loss is a function of the RMS current in
P SW =
V O × I IN × ( t R + t F ) × f SW
4
the switch while the switching loss is a function of switch-
ing frequency and instantaneous switch voltage and cur-
rent. Use the following equations to calculate the RMS
current, DC loss, and switching loss of each converter.
The MAX5099 is available in a thermally enhanced pack-
age and can dissipate up to 2.7W at +70°C ambient
temperature. The total power dissipation in the package
must be limited so that the operating junction tempera-
ture does not exceed its absolute maximum rating of
+150°C at maximum ambient temperature.
For the buck converter:
where t R and t F are rise and fall times of the internal
MOSFET. The t R and t F can be measured in the actual
application.
The supply current in the MAX5099 is dependent on
the switching frequency. See the Typical Operating
Characteristics to find the supply current of the
MAX5099 at a given operating frequency. The power
dissipation (P S ) in the device due to supply current
(I SUPPLY ) is calculated using following equation:
P S = V INMAX x I SUPPLY
I RMS =
3
( I DC 2 + I PK 2 + ( I DC × I PK ) ) × D MAX
P DC = I RMS 2 × R O N ( MAX )
The total power dissipation P T in the device is:
P T = P DC1 + P DC2 + P SW1 + P SW2 + P S
where P DC1 and P DC2 are DC losses in converter 1 and
converter 2, respectively. P SW1 and P SW2 are switching
losses in converter 1 and converter 2, respectively.
20
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| EMM15DTMT-S189 | CONN EDGECARD 30POS R/A .156 SLD |
| LQW15AN40NG00D | INDUCTOR |
| VI-B5V-EX-F3 | CONVERTER MOD DC/DC 5.8V 75W |
| RCM40DCCI | CONN EDGECARD 80POS R/A .156 SLD |
| MAX6467US16D7+T | IC MPU/RESET CIRC 1.575V SOT143 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5099ATJ+ | 功能描述:直流/直流开关转换器 Dual 2.2MHz Synch Buck Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX5099ATJ+T | 功能描述:直流/直流开关转换器 Dual 2.2MHz Synch Buck Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX5099EVKIT+ | 功能描述:电源管理IC开发工具 MAX5098A/99 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 |
| MAX509ACAP | 功能描述:数模转换器- DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| MAX509ACAP+ | 功能描述:数模转换器- DAC 8-Bit 4Ch Precision DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。