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参数资料
| 型号： | MAX8753ETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/20页 |
| 文件大小： | 0K |
| 描述： | IC DC-DC CONV TFT LCD 28TQFN |
| 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： | 2.6 V ~ 5.5 V |
| 输出数： | 4 |
| 输出电压： | 2.6 V ~ 13 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
TFT LCD DC-DC Converter with
Integrated Charge Pumps
SUPN
P3
C3
D4
V SUPN
R ON
CONTROL
C3P
D5
V NEG
C NEG
N3
OSC
CHARGE-
PUMP
FBN
R3
LOGIC
EA
MAX8753
1.25V
250mV
REF
R4
Figure 5. Negative Charge-Pump Regulator Block Diagram
GND
PGND
C REF
Linear Regulator
The MAX8753 contains a linear regulator that uses an
internal pMOS transistor to supply load currents up to
300mA. Connect FBL to GND to set the linear regulator
output to 2.5V. Connect an external resistive voltage-
divider between the regulator output and GND with the
midpoint connected to FBL to adjust the linear-regulator
output. An error amplifier compares the FBL voltage with
the 1.25V internal reference voltage and amplifies the
difference. If the feedback voltage is higher than the ref-
erence voltage, the controller lowers the gate voltage of
the pMOS transistor, which reduces the amount of cur-
rent delivered to the output. If the feedback voltage is
too low, the device increases the pMOS transistor ’ s gate
voltage, which allows more current to pass to the output
and raises the output voltage. The linear regulator also
includes an output current limit that protects the internal
pass transistor against short circuits.
The linear regulator is enabled whenever REF is in reg-
ulation and SHDN is logic-high.
The linear regulator current-limit circuitry monitors the
current flowing through the internal pass transistor. The
internal current limit is approximately 500mA. The linear
regulator output declines when it is not able to supply
the load current. If the FBL voltage drops below 0.75V,
the current limit folds back to approximately 100mA.
Reference Voltage (REF)
The reference output is nominally 1.25V and can
source up to 50μA. Bypass REF with a 0.22μF ceramic
capacitor connected between REF and GND. The refer-
ence remains disabled in shutdown.
Power-Up Sequence and Shutdown Control
When the MAX8753 is powered up, all outputs are dis-
abled as long as SHDN is low. After SHDN is logic-
high, the reference and the linear regulator power up
first. The main DC-DC step-up converter, the negative
14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8753EVKIT | 功能描述:电源管理IC开发工具 MAX8753 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX8756ETI+ | 功能描述:电流和电力监控器、调节器 Interleaved Dual Power-Supply Ctlr RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX8756ETI+T | 功能描述:电流和电力监控器、调节器 Interleaved Dual Power-Supply Ctlr RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX8757ETG+ | 制造商:Maxim Integrated Products 功能描述:INTERLEAVED HI-EFF AND DUAL PS CNTRLR 24TQFN EP - Rail/Tube |
| MAX8757ETI+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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