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参数资料
| 型号： | MAX1946ETA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/13页 |
| 文件大小： | 0K |
| 描述： | IC USB SW SGL AUTORESET 8TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 应用： | USB，外设 |
| 电流 - 电源： | 40µA |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（3x3） |
| 包装： | 标准包装 |
| 其它名称： | MAX1946ETA+TDKR |
Single USB Switch with Autoreset and
Fault Blanking in Tiny TDFN
Typical Operating Characteristics (continued)
(Circuit of Figure 2, V IN = 5V, C IN = 0.1μF, C OUT = 1μF, ON = SEL, T A = +25°C, unless otherwise noted.)
STARTUP WAVEFORMS
A
B
C
D
C OUT = 100 μ F
C OUT = 100 μ F
R OUT = 10 ?
1ms/div
A: V OUT , 5V/div
B: V FAULT , 5V/div
C: V OUT , 2V/div
MAX1946 toc21
0
0
0
0
A
B
C
UVLO RESPONSE
10ms/div
A: V IN , 2V/div
B: V OUT , 2V/div
C: V FAULT , 2V/div
MAX1946 toc22
0
0
0
D: I OUT , 500mA/div
Pin Description
PIN
1
2
3, 4
5, 6
7
8
—
NAME
FAULT
GND
OUT
IN
ON
SEL
EP
FUNCTION
Fault-Indicator Output Switch. Open-drain output asserts low when switch enters thermal shutdown,
undervoltage lockout, or a sustained (>20ms) current-limit or short-circuit condition.
Ground
Switch Power Output. Connect OUT pins together at the device and bypass with a 1μF ceramic
capacitor. Load conditions may require additional bulk capacitance. When disabled, OUT goes into
a high-impedance state.
Switch Power Input. Connect IN pins together at the device and bypass with a 0.1μF ceramic
capacitor to GND. Input conditions may require additional bulk capacitance to prevent pulling the
input supply down.
ON/OFF Control Input. The active polarity of ON is set by SEL. Connect SEL high to make ON active
high. Connect SEL to GND to make ON active low.
Logic Input Polarity Select. SEL sets the active polarity of the ON input. Connect SEL high to make
ON active high. Connect SEL to GND to make ON active low.
Exposed Metal Paddle. This paddle is internally connected to GND through a soft connect. For
enhanced thermal dissipation, connect EP to a large ground plane. Do not use EP as a sole ground
connection.
Detailed Description
The MAX1946 includes output current limiting, short-cir-
cuit protection, thermal shutdown, an enable input, and
fault indicator (see the Functional Diagram). A logic
input at SEL sets the active polarity of the enable input.
The fault indicator notifies the system when the current-
limit, short-circuit, undervoltage lockout, or thermal-
shutdown threshold is exceeded.
The MAX1946 operates from a 2.7V to 5.5V input
supply and supplies a minimum output current of 740mA.
A built-in current limit of 1.1A limits the output current in
the event of an overload condition. A built-in short-circuit
detection circuit pulses the output current if the output
voltage falls below 1V. This lowers RMS output current
and reduces power dissipation during continuous short
conditions.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1946EUA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1947ETA18 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1947ETA18+ | 制造商:Maxim Integrated Products 功能描述:CONV DC-DC SGL-OUT STEP UP 8TDFN EP - Rail/Tube |
| MAX1947ETA18+T | 功能描述:直流/直流开关转换器 Step-Up w/RESET DC/DC 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 |
| MAX1947ETA18-T | 功能描述:直流/直流开关转换器 Step-Up w/RESET DC/DC 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 |
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