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参数资料
| 型号： | MAX5098AATJ+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 22/28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： | 2,500 |
| 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 ~ 0.85 V，4.5 V ~ 28 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： | 无 |
| 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： | 带卷 (TR) |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
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Dual, 2.2MHz, Automotive Buck or Boost
Converter with 80V Load-Dump Protection
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
R 1
V OUT
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.
FB_
-
g M
COMP_
Use procedure 1 to calculate the compensation net-
work components when f ZERO,ESR < f C .
Buck Converter Compensation
R 2
V REF
+
R F
C F
C CF
Procedure 1 (See Figure 4)
1) Calculate the f ZERO,ESR and LC double-pole fre-
quencies:
f ZERO , ESR =
1
2 π × ESR × C OUT
Figure 4. Type II Compensation Network
f LC =
1
2 π L OUT × C OUT
4) Place a zero at or below the LC double pole:
2) Select the unity-gain crossover frequency:
C F =
1
2 π × R F × f LC
f C ≤ SW
f
20
5) Place a high-frequency pole at f P = 0.5 x f SW .
If the f ZERO,ESR is lower than f C and close to f LC , use a
Type II compensation network where R F C F provides a
midband zero f MID,ZERO , and R F C CF provides a high-
C CF =
C F
( 2 π × 0 . 5 f SW × R F × C F ) ? 1
frequency pole.
3) Calculate modulator gain G M at the crossover fre-
quency.
Procedure 2 (See Figure 5)
If the output capacitor used is a low-ESR ceramic type,
the ESR frequency is usually far away from the targeted
unity crossover frequency (f C ). In this case, Type III
×
G M =
V IN
V OSC
×
ESR + ( 2 π × f C × L OUT ) V OUT
ESR 0 . 8
compensation is recommended. Type III compensation
provides two-pole zero pairs. The locations of the zero
and poles should be such that the phase margin peaks
f C ≤ SW
where V OSC is a peak-to-peak ramp amplitude equal to
1V.
The transconductance error amplifier gain is:
G E/A = g M x R F
The total loop gain at f C should be equal to 1:
G M x G E/A = 1
or
around f C . It is also important to place the two zeros at
or below the double pole to avoid the conditional stabil-
ity issue.
1) Select a crossover frequency:
f
20
2) Calculate the LC double-pole frequency, f LC :
R F =
V OSC ( ESR + 2 π × f C × L OUT ) × V OUT
0 . 8 × V IN × g M × ESR
f LC =
1
2 π × L OUT × C OUT
22
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5099 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Dual, 2.2MHz, Automotive Synchronous Buck Converter with 80V Load-Dump Protection |
| MAX5099ATJ | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Dual, 2.2MHz, Automotive Synchronous Buck Converter with 80V Load-Dump Protection |
| 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 |
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