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参数资料
| 型号： | MAX5065EAI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/32页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 28-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 46 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 90% |
| 电源电压： | 4.75 V ~ 28 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 包装： | 管件 |
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Dual-Phase, +0.6V to +3.3V Output Parallelable,
Average-Current-Mode Controllers
Protection
The MAX5067 includes output overvoltage protection
(OVP), undervoltage protection (UVP), phase failure,
and overload protection to prevent damage to the pow-
ered electronic circuits.
Overvoltage Protection (MAX5067)
The OVP comparator compares the OVPIN input to the
overvoltage threshold (Figure 7). The overvoltage
threshold is typically +0.8V. A detected overvoltage
event latches the comparator output forcing the power
stage into the OVP state. In the OVP state, the high-
side MOSFETs turn off and the low-side MOSFETs latch
on. Use the OVPOUT high-current output driver to turn
on an external crowbar SCR. When the crowbar SCR
turns on, a fuse must blow or the source current for the
MAX5067 regulator must be limited to prevent further
damage to the external circuitry. Connect the SCR
close to the input source and after the fuse. Use an
SCR large enough to handle the peak I 2 t energy due to
the input and output capacitors discharging and the
current sourced by the power-source output. Connect
DIFF to OVPIN for differential output sensing and over-
voltage protection. Add an RC delay to reduce the sen-
sitivity of the overvoltage circuit and avoid nuisance
tripping of the converter (Figures 1, 2). Connect a resis-
tor-divider from the load to SGND to set the OVP output
voltage.
Power-Good Generator (MAX5067)
The PGOOD output is high if all of the following condi-
tions are met (Figure 8):
1) The output is within 90% to 108% of the pro-
grammed output voltage.
2) Both phases are providing current.
3) EN is high.
A window comparator compares the differential amplifier
output (DIFF) against 1.08 times the set output voltage
for overvoltage and 0.90 times the set output voltage for
undervoltage monitoring. The phase-failure comparator
detects a phase failure by comparing the current-error-
amplifier output (CLP_) with a 2.0V reference.
Use a 10k ? pullup resistor from PGOOD to a voltage
source less than or equal to V CC . An output voltage
outside the comparator window or a phase-failure con-
dition forces the open-drain output low. The open-drain
MOSFET sinks 4mA of current while maintaining less
than 0.2V at the PGOOD output.
V OVP = ? 1 + A ? × 0 . 8 V
? R ?
? R B ?
(8)
DIFF
V REF
8% OF V REF
PGOOD
MAX5067
OVPIN
RB
RA
V OUT
CLP1
10% OF V REF
DIFF
+2.0V
R IN
EAN
R F
EAOUT
CLP2
PHASE-FAILURE DETECTION
Figure 7. OVP Input Delay
Figure 8. Power-Good Generator (MAX5067)
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5065EAI+ | 功能描述:电流型 PWM 控制器 Dual-Phase .6-3.3V Parallelable Average RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX5065EAI+T | 功能描述:电流型 PWM 控制器 Dual-Phase .6-3.3V Parallelable Average RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX5065EAI-T | 功能描述:电流型 PWM 控制器 Dual-Phase .6-3.3V Parallelable Average RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX5065EVKIT | 功能描述:电源管理IC开发工具 MAX5065 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 |
| MAX5066 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications |
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