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参数资料
| 型号： | MAX5060ATI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/31页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1.5MHz |
| 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 ~ 125°C |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 包装： | 管件 |
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0.6V to 5.5V Output, Parallelable,
Average-Current-Mode DC-DC Controllers
Protection
The MAX5060 includes a power-good generator
(PGOOD) for undervoltage protection (UVP), and a
reverse current-limit protection; the MAX5060/MAX5061
include a hiccup current-limit protection to prevent dam-
age to the powered electronic circuits. Additionally, the
MAX5060 includes output overvoltage protection (OVP).
PGOOD Generator (MAX5060)
A PGOOD comparator compares the differential ampli-
fier output (DIFF) against 0.90 times the set output volt-
age for undervoltage monitoring (see Figure 8). Use a
10k ? pullup resistor from PGOOD to a voltage source
less than or equal to V CC .
Current Limit
forcing the power stage into the OVP state. In the OVP
state, the high-side MOSFET turns off and the low-side
MOSFET latches on. Connect DIFF to OVI for differential
output sensing and overvoltage protection. Alternately,
use a separate sensing network from V OUT to SGND.
Connect OVI to the center tap of a resistor-divider from
V OUT to SGND. In this case, the center tap is compared
against 1.276V. Add an RC delay to reduce the sensitivity
of the overvoltage circuit and avoid nuisance tripping of
the converter (Figure 9). Disable the overvoltage function
by connecting OVI to SGND.
The VEA output is clamped to 930mV with respect to the
common-mode voltage (V CM ). Average current-mode
control has the ability to limit the average current sourced
by the converter during a fault condition. When a fault
condition occurs, the VEA output clamps to 930mV with
respect to the common-mode voltage (0.6V) to limit the
maximum current sourced by the converter to I LIMIT =
26.9mV/R S .
The hiccup current limit overrides the average current
limit. The MAX5060/MAX5061 include hiccup current-
limit protection to reduce the power dissipation during
a fault condition. The hiccup current-limit circuit derives
inductor current information from the output of the cur-
DIFF
0.9 x V REF
V CM
MAX5060
PGOOD
rent amplifier. This signal is compared against one half
of V CLAMP(EA) . With no resistor connected from the LIM
pin to ground, the hiccup current limit is set at 90% of
the full-load average current limit. Use R EXT to increase
the hiccup current limit from 90% to 100% of the full-
load average limit (see Figures 1 and 2). The hiccup
current limit can be disabled by connecting LIM to
Figure 8. PGOOD Generator
SGND. In this case, the circuit will follow the average
current-limit action during overload conditions.
An internal clamp (MAX5060) limits the continuous
OVI
R A
reverse current the buck converter sinks when a higher
voltage is applied at the output. The reverse current limit
translated at the current-amplifier input is -2.3mV (typ).
The maximum reverse current the converter sinks
MAX5060
DIFF
R IN
depends on the current-sense resistor. Normally it is
about 10% of the full load current.
Overvoltage Protection (OVP) (MAX5060)
The OVP comparator compares the OVI input to the over-
voltage threshold. The overvoltage threshold is typically
EAN
EAOUT
R F
+12.7% above the internal 0.6V reference voltage. A
detected overvoltage event latches the comparator output
Figure 9. Overvoltage Protection Input Delay
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5060ATI+ | 功能描述:DC/DC 开关控制器 .6-5.5V Parallelable Average-Current-Mode RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX5060ATI+T | 功能描述:DC/DC 开关控制器 .6-5.5V Parallelable Average-Current-Mode RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX5060ATI-T | 功能描述:DC/DC 开关控制器 .6-5.5V Parallelable Average-Current-Mode RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX5060ETI | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX5060ETI+ | 功能描述:DC/DC 开关控制器 .6-5.5V Parallelable Average-Current-Mode RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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