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参数资料
| 型号： | MAX8752ETA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC DC-DC CONV TFT LCD 8-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 转换器，TFT，LCD |
| 输入电压： | 1.8 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 1.8 V ~ 13 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
TFT LCD Step-Up DC-DC Converter
where I LIM is the current limit calculated above, η is the
regulator efficiency (85% nominal), and D is the duty
Table 1. Component List
cycle. The duty cycle when operating at the current
limit is:
DESIGNATION
DESCRIPTION
10μF ±10%, 4V X5R ceramic capacitor
D =
V OUT ? V IN + V DIODE
V OUT ? I LIM × R ON + V DIODE
C1
(0603)
TDK C1608X5R0G106K
Murata GRM188R60G106M
10μF ±10%, 16V X5R ceramic capacitor
where V DIODE is the rectifier diode forward voltage and
R ON is the on-resistance of the internal MOSFET.
Bootstrapping and Soft-Start
The MAX8752 features bootstrapping operation. In nor-
mal operation, the internal linear regulator supplies
power to the internal circuitry. The input of the linear
regulator (SUP) should be directly connected to the
output of the step-up regulator. After the input voltage
C2
D1
L1
(1206)
TDK C3216X5R1C106K
Murata GRM319R61A106K
3A, 30V Schottky diode (M-flat)
Toshiba CRS02
2.6μH, 2.1A power inductor
3.3μH, 1.7A power inductor
Sumida CDRH6D12-3R3
at SUP is above 1.75V, the regulator starts open-loop
switching to generate the supply voltage for the linear
regulator. The internal reference block turns on when
the LDO voltage exceeds 2.7V (typ).
When the reference voltage reaches regulation, the
PWM controller and the current-limit circuit are enabled
and the step-up regulator enters soft-start. During the
soft-start, the main step-up regulator directly limits the
peak inductor current, allowing from zero up to the full
current limit in eight equal current steps. The maximum
load current is available after the output voltage reach-
es regulation (which terminates soft-start), or after the
soft-start timer expires (13ms typ). The soft-start routine
minimizes the inrush current and voltage overshoot and
ensures a well-defined startup behavior.
Shutdown
The MAX8752 shuts down to reduce the supply current
to 0.1μA when SHDN is low. In this mode, the internal ref-
erence, error amplifier, comparators, and biasing circuit-
ry turn off and the n-channel MOSFET is turned off. In
shutdown, the step-up regulator’s output is connected to
IN through the external inductor and rectifier diode.
Table 2. Component Suppliers
Applications Information
Step-up regulators using the MAX8752 can be
designed by performing simple calculations for a first
iteration. All designs should be prototyped and tested
prior to production. Table 1 provides a list of power
components for the typical applications circuit. Table 2
lists component suppliers.
External component value choice is primarily dictated
by the output voltage and the maximum load current,
as well as maximum and minimum input voltages.
Begin by selecting an inductor value. Once the induc-
tor value and peak current are known, choose the
diode and capacitors.
Inductor Selection
The minimum inductance value, peak current rating,
and series resistance are factors to consider when
selecting the inductor. These factors influence the con-
verter’s efficiency, maximum output load capability,
transient response time, and output voltage ripple.
Physical size and cost are also important factors to
consider.
Murata
Sumida
TDK
Toshiba
SUPPLIER
PHONE
770-436-1300
847-545-6700
847-803-6100
949-455-2000
FAX
770-436-3030
847-545-6720
847-803-6296
949-859-3963
WEBSITE
www.murata.com
www.sumida.com
www.component.tdk.com
www.toshiba.com/taec
8
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| MAX8753ETI | 功能描述:LCD 驱动器 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 |
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| MAX8753ETI+T | 功能描述:LCD 驱动器 TFT LCD Step-Up DC/DC Converter 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 |
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