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参数资料
| 型号： | MAX1606EUA |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/10页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 0.5A 8UMAX |
| 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） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 28 V |
| 输入电压： | 2.4 V ~ 5.5 V |
| 频率 - 开关： | 500kHz |
| 电流 - 输出： | 500mA |
| 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-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 8-uMAX |
28V Internal Switch LCD Bias Supply
with True Shutdown
L1
10 μ H
D1, D2 = CENTRAL SEMICONDUCTOR
CMPD7000 (DUAL)
D3 = CENTRAL SEMICONDUCTOR
CMSD4448 (1N4148)
V IN = 0.8V TO 5.5V
SW
D3
C5
10 μ F
V CC = 2.4V TO 5.5V
BATT
V CC
MAX1606
LX
FB
R3
1 ?
C1
1nF
R1
240k
R2
16.5k
C4
0.01 μ F
C6
1 μ F
LIM
C1
0.1μF
V NEG = -19V
ON
OFF
SHDN
GND
D1
D2
C2
1 μ F
Figure 4. Negative Voltage for LCD Bias
switching current. Choose a reverse breakdown voltage
greater than the output voltage.
Capacitors
For most applications, use a small 1μF ceramic sur-
face-mount output capacitor. For small ceramic capaci-
tors, the output ripple voltage is dominated by the
capacitance value. If tantalum or electrolytic capacitors
are used, the higher ESR increases the output ripple
voltage. Decreasing the ESR reduces the output ripple
voltage and the peak-to-peak transient voltage.
Surface-mount capacitors are generally preferred
because they lack the inductance and resistance of
their through-hole equivalents.
Two inputs, V CC and V BATT , require bypass capacitors.
Bypass V CC with a 1μF ceramic capacitor as close to
the IC as possible. The BATT input supplies high cur-
rents to the inductor and requires local bulk bypassing
close to the inductor. A 10μF low-ESR surface-mount
capacitor is sufficient for most applications.
A feed-forward capacitor connected from the output to
FB improves stability over a wide range of battery volt-
ages. A 10pF capacitor is sufficient for most applica-
tions. Larger values (up to 47pF) may be needed with
lower current-limit settings (LIM = GND or open) and
low input voltages, or with nonoptimum PC board lay-
outs. Note that increasing C FF may slightly affect load
regulation.
PC Board Layout and Grounding
Careful printed circuit layout is important for minimizing
ground bounce and noise. Keep the MAX1606 ’s
ground pin and the ground leads of the input and out-
put capacitors less than 0.2in (5mm) apart. In addition,
keep all connections to FB and LX as short as possible.
In particular, external feedback resistors should be as
close to FB as possible. To minimize output voltage rip-
ple, and to maximize output power and efficiency, use a
ground plane and solder GND directly to the ground
plane. Refer to the MAX1606EVKIT evaluation kit for a
layout example.
Applications Information
Negative Voltage for LCD Bias
The MAX1606 can also generate a negative output by
adding a diode-capacitor charge-pump circuit (D1, D2,
and C3) to the LX pin as shown in Figure 4. Feedback
is still connected to the positive output, which is not
loaded, allowing a very small capacitor value at C4. For
best stability and lowest ripple, the time constant of the
R1-R2 series combination and C4 should be near or
less than that of C2 and the effective load resistance.
Output load regulation of the negative output is some-
what looser than with the standard positive output cir-
cuit, and may rise at very light loads due to coupling
through the capacitance of D2. If this is objectionable,
reduce the resistance of R1 and R2, while maintaining
their ratio, to effectively preload the output with a few
hundred microamps. This is why the R1-R2 values
shown in Figure 4 are about four-times lower than typi-
cal values used for a positive-output design. When
loaded, the negative output voltage will be slightly
lower (closer to ground by approximately a diode for-
ward voltage) than the inverse of the voltage on C4.
Chip Information
TRANSISTOR COUNT: 3883
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1606EUA.C71076 | 制造商:Maxim Integrated Products 功能描述: |
| MAX1606EUA+ | 功能描述:LCD 驱动器 28V Int Switch LCD Bias Supply RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| MAX1606EUA+T | 功能描述:LCD 驱动器 28V Int Switch LCD Bias Supply RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| MAX1606EUA-T | 功能描述:LCD 驱动器 28V Int Switch LCD Bias Supply RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| MAX1606EUA-TG069 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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