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参数资料
| 型号： | MAX630CSA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/14页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST 0.15A 8SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 升压（升压） |
| 输出数： | 1 |
| 输入电压： | 2 V ~ 16.5 V |
| 频率 - 开关： | 40kHz |
| 电流 - 输出： | 150mA |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 8-SOIC |
CMOS Micropower Step-Up
Switching Regulator
+3V Battery to +5V DC-DC Converter
A common power-supply requirement involves conver-
sion of a 2.4V or 3V battery voltage to a 5V logic sup-
ply. The circuit in Figure 5 converts 3V to 5V at 40mA
with 85% efficiency. When I C (pin 6) is driven low, the
output voltage will be the battery voltage minus the
drop across diode D1.
The optional circuitry using C1, R3, and R4 lowers the
oscillator frequency when the battery voltage falls to
2.0V. This lower frequency maintains the output-power
capability of the circuit by increasing the peak inductor
current, compensating for the reduced battery voltage.
Uninterruptable +5V Supply
In Figure 6, the MAX630 provides a continuous supply
of regulated +5V, with automatic switchover between
line power and battery backup. When the line-powered
input voltage is at +5V, it provides 4.4V to the MAX630
and trickle charges the battery. If the line-powered
input falls below the battery voltage, the 3.6V battery
supplies power to the MAX630, which boosts the bat-
tery voltage up to +5V, thus maintaining a continuous
supply to the uninterruptable +5V bus. Since the +5V
output is always supplied through the MAX630, there
are no power spikes or glitches during power transfer.
+12V
47 μ F
25V
The MAX630’s low-battery detector monitors the line-
powered +5V, and the LBD output can be used to shut
down unnecessary sections of the system during power
failures. Alternatively, the low-battery detector could
monitor the NiCad battery voltage and provide warning
of power loss when the battery is nearly discharged.
Unlike battery backup systems that use 9V batteries,
this circuit does not need +12V or +15V to recharge the
battery. Consequently, it can be used to provide +5V
backup on modules or circuit cards that only have 5V
available.
9V Battery Life Extender
Figure 7’s circuit provides a minimum of 7V until the 9V
battery voltage falls to less than 2V. When the battery
voltage is above 7V, the MAX630’s I C pin is low, putting
it into the shutdown mode that draws only 10nA. When
the battery voltage falls to 7V, the MAX8212 voltage
detector’s output goes high, enabling the MAX630. The
MAX630 then maintains the output voltage at 7V, even
as the battery voltage falls below 7V. The LBD is used
to decrease the oscillator frequency when the battery
voltage falls to 3V, thereby increasing the output cur-
rent capability of the circuit.
10k Ω
1N4148
SHUTDOWN
6
I C
5
+V S
3
L X
MAX630
280k Ω
OPERATE
499k Ω
2
C X
GND
V FB
7
2mH
3
L X
6
I C
47pF
4
100k Ω
33 μ H
3V
LITHIUM
CELL
5
2
+V S
C X
MAX630
GND
V FB
7
1/6 4069
1N5817
IRF543
+5V AT 0.5A
47pF
SECTION 1
4
47.6k Ω
SECTION 2
470 μ F
Figure 4. High-Power 3V to 5V Converter with Shutdown
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX630CSA+ | 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 |
| MAX630CSA+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 |
| MAX630CSA-C70048 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX630CSA-C71098 | 制造商:Maxim Integrated Products 功能描述:8 PINS N.SO PKG - Rail/Tube |
| MAX630CSA-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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