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参数资料
| 型号： | MAX1822ESA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/10页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHED CAP ADJ 8SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 切换式电容器（充电泵） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 14.5 V ~ 27.5 V |
| 输入电压： | 3.5 V ~ 16.5 V |
| 频率 - 开关： | 90kHz |
| 电流 - 输出： | 25mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°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 |
High-Side Power Supply
+3.5V TO +16.5V
4-CHANNEL LOAD SWITCH—NO PULLUP RESISTORS
ALL TRANSISTORS = IRF541 (NOTE 1)
TO LOAD
C4
1 μ F
C1
0.01 μ F
C2
0.01 μ F
1
7
6
2
C1+
C1-
C2+
C2-
8
V CC
MAX1822
GND
4
V OUT
C3 10 μ F
5
16
2
9
12
19
4
7
14
V+
N01
N02
N03
N04
NC1
NC2
NC3
MAX333
COM1
COM2
COM3
COM4
3
8
13
18
TO LOAD
TO LOAD
TO LOAD
17
NC4
5 V-
ALL CAPACITORS = 1 μ F (NOTE 2)
IN1
IN2
IN3
IN4
NOTE 1: TRANSISTOR TYPE DEPENDS
ON LOAD-CURRENT REQUIREMENTS.
SW1
1
10
11
20
NOTE 2: 1 μ F CAPACITORS SUPRESS SWITCHING
TRANSIENTS — VALUE DEPENDS
ON LOAD CURRENT.
SW2
SW3
SW4
Figure 5. MAX1822 Powering a MAX333 Quad Analog Switch, Realizing a 4-Channel Load Switch with No Pullup Resistors
R 2 = R 1 ? OUT ? 1 ?
4-Channel Load Switch with
No Pullup Resistors
Multiple high-side switches can be driven from a single
MAX1822 high-side power supply with no pullup resis-
tors on the FET gates. In Figure 5, a MAX1822 supplies
high-side voltage to a MAX333 quad analog switch to
control any one of four high-side switches. The FET
gates are normally connected to ground when the
MAX333 logic inputs are low.
Low-Dropout Regulator
In Figure 6, a MAX1822 high-side power supply powers
an LM10 reference and op-amp combination, providing
sufficient gate drive to turn on the FET. This allows the
regulator to achieve less than 70mV dropout at 1A load
using an IRF541, and just under 20mV for a
SMP60N06.
The 200mV reference section is configured for a gain of
25 (e.g., 200mV x 25 = 5V) and connects to the nonin-
verting input of the op amp; the regulator ’ s output con-
nects directly to the inverting input. The op amp
amplifies the error between its inputs and varies the
gate drive to the FET, regulating the output. Capacitor
C6 reduces transients due to load changes; its size
depends on the magnitude of the load change in the
application and can be reduced or eliminated if the
load remains relatively constant. With C6 = 1000μF, the
output transient to a 1A load pulsed at 20Hz is typically
less than 150mV. The regulator is turned on by apply-
ing V BATT to the Enable/ Shutdown input and turned off
by pulling this input to ground.
The regulator output voltage, V OUT , is set by the ratio of
R1 to R2, calculated as follows:
? V ?
? 0 . 2 ?
If the application does not require logic shutdown, con-
nect the MAX1822 V CC pin directly to the battery and
eliminate D2.
8
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1822ESA+ | 功能描述:直流/直流开关调节器 High-Side Power Supply 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 |
| MAX1822ESA+T | 功能描述:直流/直流开关调节器 High-Side Power Supply 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 |
| MAX1822ESA-T | 功能描述:直流/直流开关调节器 High-Side Power Supply 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 |
| MAX1823AEUB | 功能描述:电源开关 IC - USB Dual USB Switch w/Fault Blank RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1823AEUB+ | 功能描述:电源开关 IC - USB Dual USB Switch w/Fault Blank RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
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