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参数资料
| 型号： | MAX5005BCUB+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/13页 |
| 文件大小： | 0K |
| 描述： | IC REG USB LDO 150MA 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 应用： | 转换器，USB |
| 输入电压： | 4 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 3.3V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 管件 |
150mA USB LDO Regulators with ±15kV TVS
and μP Reset
brownout conditions. Reset is guaranteed to be logic
high or low depending on the device chosen (see
Ordering Information ). RESET or RESET asserts when
V OUT is below the reset threshold and remains assert-
ed for at least 100ms minimum after V OUT rises above
the reset threshold. RESET or RESET also asserts when
MR is pulled low.
SELR and ENR
When reset is not asserted a logic high to SELR con-
nects a 1.5k ? termination resistor from D+ to OUT for
full speed USB peripherals and a logic low connects a
1.5k ? termination resistor from D- to OUT for low-speed
peripherals. Logic low on ENR enables the selected
termination resistor connection and logic high disables
the selected termination resistor connection. An assert-
ed reset always disconnects the termination resistors.
D+ and D-
D+ and D- include transient voltage suppressors rated
at ±15kV (see USB ±15kV Transient Voltage
Suppression section).
The proprietary TVS shunt circuit passes no data
through the MAX5005/MAX5006/MAX5007, thereby
eliminating delays associated with series protection cir-
cuits. D+ and D- have only 1μA of leakage current and
a typical input capacitance of 40pF at 1MHz.
Manual Reset Input
Many μP-based products require manual reset capabil-
ity, allowing the operator, a test technician, or external
logic circuitry to initiate a reset. A logic low on MR
asserts a reset while the regulator output voltage is still
within tolerance.
Reset remains asserted while MR is low and for the
reset timeout period (100ms minimum) after MR returns
high. The MR input has an internal pullup of 25k ? (typ)
to OUT. Drive this input with TTL/CMOS logic levels or
with open-drain/collector outputs. Connect a normally
open momentary switch from MR to GND to create a
manual reset function; external debounce circuitry is
not required. If MR is driven from long cables or the
device is used in a noisy environment, connect a 0.1μF
capacitor from MR to GND to provide additional noise
immunity. For proper operation, ensure that the voltage
on MR is not greater than a diode drop above V OUT .
Output to Input Reverse Leakage
Protection
An internal circuit monitors the input and output volt-
ages. When the output voltage is greater than the input
voltage, the internal pass transistor and parasitic
diodes turn off, and OUT powers the device. There is
no leakage path from OUT to IN. Therefore, the output
can be powered from an auxiliary supply such as a
backup battery without any need for additional blocking
diodes.
Current Limit
The MAX5005/MAX5006/MAX5007 include a current
limiter that monitors and controls the pass transistor’s
gate voltage, limiting the output current to 350mA (typ).
For design purposes, consider the current limit to be
160mA (min) to 600mA (max). The output can be short-
ed to ground for an indefinite period without damaging
the part.
Thermal Protection
When the junction temperature exceeds T J = +160°C,
an internal thermal sensor signals the shutdown logic,
turning off the pass transistor and allowing the IC to
cool. The thermal sensor turns the pass transistor on
again after the IC’s junction temperature decreases by
20°C, resulting in a pulsed output during continuous
thermal overload conditions. Thermal overload protec-
tion is designed to protect the MAX5005/MAX5006/
MAX5007 in the event of fault conditions. For continu-
ous operation, do not exceed the absolute maximum
junction temperature rating of T J = +150°C.
Operating Region and Power Dissipation
The MAX5005/MAX5006/MAX5007’s maximum power
dissipation depends on the thermal resistance of the
case and circuit board, the temperature difference
between the die junction and the ambient air, and the
rate of airflow. The power dissipation across the device
is P = I OUT (V IN - V OUT ). The maximum power dissipa-
tion is:
P MAX = (T J - T A ) / ( Θ JA )
where T J - T A is the temperature difference between
the die junction and the surrounding air, Θ JA is the ther-
mal resistance of the package from junction to ambient.
The MAX5005/MAX5006/MAX5007’s ground pin (GND)
performs the dual function of providing an electrical
connection to the system ground and channeling heat
away. Connect GND to the system ground using a
large pad or ground plane. For optimum performance,
minimize trace inductance to D+, D-, and GND.
Applications Information
Capacitor Selection and Regulator
Stability
For stable operation over the full temperature range
and with load currents up to 150mA, use a 1μF (min)
output capacitor. To reduce noise and improve load
transient response, stability, and power-supply rejec-
tion, use large output capacitor values such as 10μF.
8
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相关代理商/技术参数 |
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|---|---|
| MAX5005BCUB+ | 功能描述:低压差稳压器 - LDO 150mA USB LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX5005BCUB+T | 功能描述:低压差稳压器 - LDO 150mA USB LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX5005BCUB-T | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX5005BEUB | 制造商:Maxim Integrated Products 功能描述:10 PINS UMAX PKG - Bulk |
| MAX5005CEPD+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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