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参数资料
| 型号： | MAX15037ATE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/25页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BST SYNC ADJ 16TQFN |
| 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： | 1 |
| 输出电压： | 0.6 V ~ 23 V |
| 输入电压： | 4.5 V ~ 23 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 312kHz ~ 2.1MHz |
| 电流 - 输出： | 3A |
| 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： | 16-WQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 16-TQFN-EP（5x5） |
2.2MHz, 3A Buck or Boost Converters
with an Integrated High-Side Switch
I RMS_MOSFET DC PK DC PK )) × MAX
= ( I +I +(I
× I
D
I IN = OUT OUT
For the boost converter:
2 2
V × I
V IN × η
3
T J = T C + (P TOTAL x θ JC )
θ JC is the junction-to-case thermal resistance equal to
1.7°C/W. T C is the temperature of the case and T J is
the junction temperature, or die temperature. The case-
to-ambient thermal resistance is dependent on how
well heat can be transferred from the PCB to the air.
Solder the underside exposed pad to a large copper
GND plane. If the die temperature reaches +170°C the
MAX15036/MAX15037 shut down and do not restart
Δ I P ? P =
( V IN ? V DROP ) × D
L × f SW
again until the die temperature cools by 25°C.
Compensation
The MAX15036/MAX15037 have an internal transcon-
ductance error amplifier with an inverting input (FB)
I DC = I IN ?
I PK = I IN +
Δ I P ? P
2
Δ I P ? P
2
and output (COMP) available for external frequency
compensation. The flexibility of external compensation
and high switching frequencies for the MAX15036/
MAX15037 allow a wide selection of output filtering
components, especially the output capacitor. For cost-
sensitive applications, use high-ESR aluminum elec-
trolytic capacitors. For size-sensitive applications, use
The power lost due to switching the internal power
MOSFET is:
low-ESR tantalum or ceramic capacitors at the output.
Before designing the compensation components, first
P SW =
V IN × I OUT × ( t R + t F ) × f SW
4
choose all the passive power components that meet
the output ripple, component size, and component cost
requirements. Secondly, choose the compensation
components to achieve the desired closed-loop band-
t R and t F are the rise and fall times of the internal power
MOSFET measured at SOURCE.
The power lost due to the switching quiescent current
of the device is:
P Q = V IN x I SW (MAX15036)
The switching quiescent current (I SW ) of the
MAX15036/MAX15037 is dependent on switching fre-
quency. See the Typical Operating Characteristics sec-
tion for the value of I SW at a given frequency.
In the case of the MAX15037, the switching current
includes the synchronous rectifier MOSFET gate-drive
width and phase margin. Use a simple 1-zero, 2-pole
pair (Type II) compensation if the output capacitor ESR
zero frequency (f ZESR ) is below the unity-gain
crossover frequency (f C ). Use a 2-zero, 2-pole (Type
III) compensation when the f ZESR is higher than f C .
Buck Converter Compensation
Use procedure 1 to calculate the compensation net-
work components when f ZESR < f C .
Procedure 1 (see Figure 3)
Calculate the f ZESR and f LC double pole:
current (I SW-DL ). The I SW-DL depends on the total gate
charge (Q g-DL ) of the synchronous rectifier MOSFET
and the switching frequency.
f ZESR =
1
2 π × ESR × C OUT
P Q = V IN x (I SW + I SW-DL ) (MAX15037)
I SW-DL = Q g-DL x f SW
f LC =
1
2 π × L × C OUT
f C = SW
where the Q g-DL is the total gate charge of the synchro-
nous rectifier MOSFET at V GS = 5V.
The total power dissipated in the device is:
P TOTAL = P MOSFET + P SW + P Q
Calculate the temperature rise of the die using the fol-
lowing equation:
Calculate the unity-gain crossover frequency as:
f
20
______________________________________________________________________________________
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15037ATE/V+ | 功能描述:直流/直流开关转换器 2.2MHz 3A Buck wInt High-Side Switch 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 |
| MAX15037ATE/V+T | 功能描述:直流/直流开关转换器 2.2MHz 3A Buck wInt High-Side Switch 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 |
| MAX15037ATE+ | 功能描述:直流/直流开关转换器 2.2MHz 3A Buck wInt High-Side Switch 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 |
| MAX15037ATE+T | 功能描述:直流/直流开关转换器 2.2MHz 3A Buck wInt High-Side Switch 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 |
| MAX15038ETG+ | 功能描述:直流/直流开关调节器 4A 2MHz Step-Down w/Integrated Switch RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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