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参数资料
| 型号： | MAX5072ETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/27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） |
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2.2MHz, Dual-Output Buck or Boost
Converter with POR and Power-Fail Output
VL
V IN
VL
V IN
VL
V+
VL
V+
OUTPUT2
DRAIN2
DRAIN1
OUTPUT1
OUTPUT2
DRAIN2
DRAIN1
OUTPUT1
SOURCE2
SOURCE1
SOURCE2
SOURCE1
MAX5072
MAX5072
FB2
FB1
R2
FB2
FB1
R1
VL
EN2
EN1
VL
VL
EN2
EN1
VL
PGOOD1
SEQUENCING—OUTPUT 2 DELAYED WITH RESPECT TO OUTPUT 1.
Figure 4. Power-Supply Sequencing Configurations
Dying Gasp Comparator (PFI/PFO)
The MAX5072 contains an uncommitted comparator
with an open-drain output. The inverting input of the
comparator is connected to an internal precision 0.78V
reference. Connect the noninverting input (PFI) to V IN
C2
R1/C1 AND R2/C2 ARE SIZED FOR REQUIRED SEQUENCING.
VL
C1
CIN
V IN
through a resistor-divider to program the input trip
threshold (V TRIP ). The power-fail output (PFO) is pulled
low when PFI drops below 0.78V. PFI provides 20mV
OUTPUT2
VL
DRAIN2
SOURCE2
V+
DRAIN1
SOURCE1
OUTPUT1
hysteresis to avoid glitches during transition. The PFO
signal provides an advance signal to the processor
before the converter 1/converter 2 loses regulation. The
input trip threshold (V TRIP ) can be adjusted to provide
advance signaling before the outputs drop to 92.5% of
MAX5072
PFI
VL
R1
R2
the regulation voltage.
The input capacitors hold charge and provide energy
to the converter after V IN is disconnected. The hold-up
PFO
PFO
R1 = R2 ? TRIP ? 1 ?
time (t HOLD ) is defined as the time when the input volt-
age drops below V TRIP and the output falls out of regu-
lation at the low end of the input voltage range V IN(MIN)
(Figure 5). Use the following equations to calculate the
resistor-divider and the C IN required for the proper
hold-up time.
Figure 5. Dying Gasp Feature Monitors Input Supply
? V ?
? 0.78 ?
R 2 can be any value from 10k ? to 100k ? (Figure 5).
2 ? OUT1 + OUT2 ?
? TRIP ? V
? V 2 2IN(MIN) ?
C IN =
? P P ?
? η 1 η 2 ?
?
× t HOLD
Current Limit
The internal switch current of each converter is sensed
using an internal current mirror. Converter 1 and con-
verter 2 have 2A and 1A internal switches. When the
peak switch current crosses the current-limit threshold
where η 1 and η 2 are efficiencies of the converter 1 and
converter 2, respectively.
of 3A (typ) and 1.8A (typ) for converter 1 and converter
2, respectively, the on cycle is terminated immediately
and the inductor is allowed to discharge. The next
cycle resumes at the next clock pulse.
16
______________________________________________________________________________________
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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 |
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