- 您现在的位置：买卖IC网 > PDF目录14388 > MAX5072ETJ+ (Maxim Integrated Products)IC REG BUCK BST ADJ 1A/2A 32TQFN PDF资料下载
参数资料
| 型号： | MAX5072ETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/27页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BST ADJ 1A/2A 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），升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 28 V |
| 输入电压： | 4.5 V ~ 23 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： | 无 |
| 工作温度： | -40°C ~ 85°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页第20页当前第21页第22页第23页第24页第25页第26页第27页
2.2MHz, Dual-Output Buck or Boost
Converter with POR and Power-Fail Output
where P DC1 and P DC2 are DC losses in converter 1 and
I RMS DC PK DC PK )) × MAX
I IN = O O
V INMAX × I O × (t R + t F ) × f SW
P SW =
4
For the boost converter:
2 2 D
= ( I +I +(I × I
3
V × I
V IN × η
converter 2, respectively. P SW1 and P SW2 are switching
losses in converter 1 and converter 2, respectively.
Calculate the temperature rise of the die using the fol-
lowing equation:
T J = T C + (P T x θ J-C )
where θ J-C is the junction-to-case thermal impedance
of the package equal to +2 ° C/W. Solder the exposed
pad of the package to a large copper area to minimize
the case-to-ambient thermal impedance. Measure the
temperature of the copper area near the device at a
worst-case condition of power dissipation and use
+2 ° C/W as θ J-C thermal impedance. The case-to-ambi-
? I L =
( V IN ? V DS ) × D
L × f SW
ent thermal impedance ( θ C-A ) is dependent on how
well the heat is transferred from the PC board to the
ambient. Use large copper area to keep the PC board
temperature low. The θ C-A is usually in the +20 ° C/W to
I DC = I IN ?
? I L
2
+40 ° C/W range.
Compensation
The MAX5072 provides an internal transconductance
I PK = I IN +
? I L
2
amplifier with its inverting input and its output available
to the user for external frequency compensation. The
flexibility of external compensation for each converter
offers wide selection of output filtering components,
P SW = O IN R F SW
P DC = I 2 RMS × R DS(ON)MAX
where V DS is the drop across the internal MOSFET. See
the Electrical Characteristics for the R DS(ON)MAX value.
V × I × ( t + t ) × f
4
where t R and t F are rise and fall times of the internal
MOSFET. The t R and t F are typically 20ns, and can be
measured in the actual application.
The supply current in the MAX5072 is dependent on
the switching frequency. See the Typical Operating
Characteristics to find the supply current of the
MAX5072 at a given operating frequency. The power
dissipation (P S ) in the device due to supply current (I S )
is calculated using following equation.
P S = V INMAX × I SUPPLY
The total power dissipation P T in the device is:
P T = P DC1 + P DC2 + P SW1 + P SW2 + P S
especially the output capacitor. For cost-sensitive
applications, use high-ESR aluminum electrolytic
capacitors; for component size-sensitive applications,
use low-ESR tantalum or ceramic capacitors at the out-
put. The high switching frequency of MAX5072 allows
use of ceramic capacitors at the output.
Choose all the passive power components that meet
the output ripple, component size, and component cost
requirements. Choose the small-signal components for
the error amplifier to achieve the desired closed-loop
bandwidth and phase margin. Use a simple pole-zero
pair (Type II) compensation if the output capacitor ESR
zero frequency is below the unity-gain crossover fre-
quency (f C ). Type III compensation is necessary when
the ESR zero frequency is higher than f C or when com-
pensating for a continuous mode boost converter that
has a right-half plane zero.
Use the following procedure 1 to calculate the compen-
sation network components when f ZERO,ESR < f C .
Buck Converter Compensation
Procedure 1 (see Figure 7):
Calculate the f ZERO,ESR and LC double pole:
______________________________________________________________________________________
21
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6468US22D3+T | IC MPU/RESET CIRC 2.188V SOT143 |
| MAX8855ETJ+ | IC REG BUCK ADJ 5A DL 32TQFN |
| MAX6467XS46D3+T | IC MPU/RESET CIRC 4.625V SC70-4 |
| VI-B5R-EX-F3 | CONVERTER MOD DC/DC 7.5V 75W |
| EBM43DCCH-S189 | CONN EDGECARD 86POS R/A .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5072ETJ+ | 功能描述:直流/直流开关转换器 2.2MHz Buck or Boost 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 |
| MAX5072ETJ+T | 功能描述:直流/直流开关转换器 2.2MHz Buck or Boost 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 |
| MAX5072ETJ-T | 功能描述:直流/直流开关转换器 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 |
| MAX5072EVKIT | 功能描述:电源管理IC开发工具 2.2MHz Buck or Boost Converter 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 |
| MAX5073 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2.2MHz, Dual-Output Buck or Boost Converter with Internal Power MOSFETs |
发布紧急采购，3分钟左右您将得到回复。