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| 型号： | MAX4193EPA |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/14页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST 525MA 8DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | 升压（升压） |
| 输出数： | 1 |
| 输入电压： | 2 V ~ 16.5 V |
| 频率 - 开关： | 25kHz |
| 电流 - 输出： | 525mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 供应商设备封装： | 8-PDIP |
CMOS Micropower Step-Up
Switching Regulator
LOW BATTERY INPUT
+5V INPUT
L1
R3
169k Ω
1 LBR
R4
100k Ω
1.31V
COMP 2
MAX630
LBD 8
LOW-BATTERY OUTPUT
(LOW IF INPUT < 3V)
470
R2
2 C X
3 L X
OSC
40kHz
COMP 1
V FB 7
I C 6
C C
47.5k Ω
R1
499k Ω
SHUTDOWN
D1
1N4148
R ON ? 3 Ω
4 GND
1.31V
BANDGAP
REFERENCE
AND
+V S 5
OPERATE
BIAS GENERATOR
+15V OUTPUT
Figure 1. +5V to +15V Converter and Block Diagram
C1
470 μ F
25V
20mA
Low-Battery Detector
The low-battery detector compares the voltage on LBR
with the internal 1.31V reference. The output, LBD, is an
open-drain N-channel MOSFET. In addition to detecting
and warning of a low battery voltage, the comparator
can also perform other voltage-monitoring operations
such as power-failure detection.
Another use of the low-battery detector is to lower the
oscillator frequency when the input voltage goes below
a specified level. Lowering the oscillator frequency
increases the available output power, compensating for
the decrease in available power caused by reduced
input voltage (see Figure 5).
Logic-Level Shutdown Input
The shutdown mode is entered whenever I C (pin 6) is
driven below 0.2V or left floating. When shut down, the
MAX630’s analog circuitry, oscillator, L X , and LBD out-
puts are turned off. The device’s quiescent current dur-
ing shutdown is typically 10nA (1μA max).
Bootstrapped Operation
In most circuits, the preferred source of +V S voltage for
the MAX630 and MAX4193 is the boosted output volt-
age. This is often referred to as a “bootstrapped” oper-
ation since the circuit figuratively “lifts” itself up.
The on-resistance of the N-channel L X output decreas-
es with an increase in +V S ; however, the device operat-
ing current goes up with +V S (see the Typical
Operating Characteristics , I S vs. +V S graph). In circuits
with very low output current and input voltages greater
than 3V, it may be more efficient to connect +V S direct-
ly to the input voltage rather than bootstrap.
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4193EPA+ | 功能描述:直流/直流开关调节器 CMOS uPower Step Up Switching Reg 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 |
| MAX4193ESA | 功能描述:直流/直流开关调节器 CMOS uPower Step Up Switching Reg 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 |
| MAX4193ESA+ | 功能描述:直流/直流开关调节器 CMOS uPower Step Up Switching Reg 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 |
| MAX4193ESA+T | 功能描述:直流/直流开关调节器 CMOS uPower Step Up Switching Reg 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 |
| MAX4193ESA-T | 功能描述:直流/直流开关调节器 CMOS uPower Step Up Switching Reg 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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