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参数资料
| 型号： | MAX1940EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/13页 |
| 文件大小： | 0K |
| 描述： | IC SW USB TRPL 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | USB，外设 |
| 电流 - 电源： | 60µA |
| 电源电压： | 4 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 带卷 (TR) |
Triple USB Switch with Autoreset and
Fault Blanking
IN_
ONA
CHARGE
PUMP
IN2
SWITCH A
(EXPANDED)
IN1
FAULTA
SEL
ILIM
OUTA
THERMAL
SHUTDOWN
25mA
MAX1940
FAULT LOGIC
20ms TIMERS
OUTB
SWITCH B
(SEE SWITCH A)
FAULTB
UVLO
OSC
25kHz
SWITCH C
OUTC
ONB
ONC
BIAS
REF
(SEE SWITCH A)
FAULTC
GND
IN2 IN3
IN4
IN5
Figure 1. Functional Diagram
Detailed Description
The MAX1940 triple current-limited USB power switch
provides three independent switches, each with its own
enable-control input and fault indicator (see Figure 1).
A logic input sets the active polarity of the enable con-
trol inputs. The fault indicators notify the system when
the current-limit, short-circuit, undervoltage lockout, or
thermal-shutdown threshold is exceeded.
The MAX1940 operates from a 4V to 5.5V input supply
and supplies a minimum output current of 700mA per
channel. A built-in current limit of 0.9A (typ) limits the
output current in the event of an overload condition.
Built-in short-circuit detection pulses the output current if
the output voltage falls below 1V, resulting in lower RMS
output current and reduced power dissipation in the
device. Independent thermal shutdown allows normal
operation to continue if one channel experiences a pro-
longed overload or short-circuit condition.
Low-R ON NMOS switches enable the MAX1940 to pro-
vide three switches in the space-saving 16-pin QSOP
package. An internal micropower charge pump gener-
ates the high-side supply needed for driving the gates
of these high-side switches. Separate current-limiting
and thermal-shutdown circuitry permits each switch to
operate independently, improving system robustness.
8
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| MAX1945EVKIT | 制造商:Maxim Integrated Products 功能描述:1MHZ, 1% ACCURATE, 6A INTERNAL SWITCH STEP-DO - Bulk |
| MAX1945REUI | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1945REUI/GG8 | 制造商:Maxim Integrated Products 功能描述: |
| MAX1945REUI/GH9 | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1945REUI/GH9-T | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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