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参数资料
| 型号： | MAX1997ETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/31页 |
| 文件大小： | 0K |
| 描述： | IC PWR SUPPLY TFT LCD 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 应用： | 控制器，TFT LCD |
| 输入电压： | 2.7 V ~ 5.5 V |
| 输出数： | 5 |
| 输出电压： | 2.7 V ~ 13 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 管件 |
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Quintuple/Triple-Output TFT LCD Power Supplies
with Fault Protection and VCOM Buffer
Pin Description (continued)
PIN
MAX1997 MAX1998
NAME
FUNCTION
Gamma Linear-Regulator (REG 2) Base Drive. Open drain of an internal N-channel MOSFET.
19
—
DRV2
Connect DRV2 to the base of an external PNP linear regulator pass transistor. (See the Pass
Transistor Selection section.)
Main Step-Up Regulator Feedback Input. Connect FB to the center tap of a resistive voltage-
20
11
FB
divider between the main output (V MAIN ) and the analog ground (GND) to set the main step-
up regulator output voltage. (See the Main Step-Up Regulator, Output Voltage Selection
section.) Place the resistive voltage-divider close to the pin.
Gate-On Linear-Regulator (REG P) Feedback Input. FBP regulates to 1.25V nominal. Connect
21
12
FBP
FBP to the center tap of a resistive voltage-divider between the REG P output and the analog
ground (GND) to set the output voltage. Place the resistive voltage-divider close to the pin.
Gate-On Linear-Regulator (REG P) Base Drive. Open drain of an internal N-channel MOSFET.
22
13
DRVP
Connect DRVP to the base of an external PNP linear-regulator pass transistor. (See the Pass
Transistor Selection section.)
23
24
14
15
LX
TGNDA
Switching Node. Drain of the internal N-channel power MOSFET for the main step-up
regulator.
Internal Connection. Connect this pin to ground. Do not leave this pin floating.
Overcurrent Comparator Inverting Input. Connect OCN to the center tap of a resistive
25
16
OCN
voltage-divider connected to the drain of the external input protection P-channel MOSFET.
(See the Input Overcurrent Protection section.) If unused, connect OCN to REF.
Overcurrent Comparator Noninverting Input. Connect OCP to the center tap of a resistive
26
17
OCP
voltage-divider connected to the source of the external input protection P-channel MOSFET.
The voltage on OCP sets the input overcurrent threshold. (See the Input Overcurrent
Protection section.) If unused, connect OCP to GND.
27
18
GATE
Gate-Drive Output to the External Input Protection P-Channel MOSFET. (See the Input
Overcurrent Protection section.) If unused, leave GATE unconnected.
Fault Timer Select Input. Pull PFLT above its logic high threshold (0.7 × V IN ) to set the fault
28
—
PFLT
delay period to 87ms. Pull PFLT below its logic low threshold (0.3 × V IN ) to set the fault delay
period to 22ms. Leave PFLT unconnected to set the fault delay period to 44ms. The fault
delay period for the MAX1998 is fixed at 87ms.
Supply Input. The supply voltage powers all the control circuitry. The input voltage range is
29
19
IN
from 2.7V to 5.5V. Bypass IN to GND with a 0.47μF ceramic capacitor. Place the capacitor
within 5mm of IN.
30
—
ONDC
Step-Up Regulator Logic Control Input. The step-up regulator, VCOM buffer, and the sequence
timing block are enabled when ONDC is high and disabled when ONDC is low.
Frequency Select Input. Pull FREQ above its logic high threshold (0.7 × V IN ) to set the main
31
20
FREQ
step-up regulator switching frequency to 1.5MHz. Pull FREQ below its logic low threshold
(0.3 × V IN ) to set the frequency to 375kHz. Leave FREQ unconnected to set the frequency
to 750kHz.
Active-Low Shutdown Control Input. All the sections of the device are disabled and the GATE
32
—
SHDN
pin goes high when SHDN is below its 0.4V logic low threshold. Pull SHDN above its 1.6V
logic high threshold to enable the device. Do not leave SHDN unconnected.
12
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1997ETJ+ | 功能描述:其他电源管理 Quint/Triple-Out TFT LCD Power Supply RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| MAX1997ETJ+T | 功能描述:LCD 驱动器 Quint/Triple-Out TFT LCD Power 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 |
| MAX1997ETJ-T | 功能描述:其他电源管理 RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| MAX1997EVKIT | 制造商:Maxim Integrated Products 功能描述:QUINTUPLE/TRIPLE OUTPUT TFT LCD POWER SUPPLIE - Bulk |
| MAX19983A | 功能描述:上下转换器 RoHS:否 制造商:Texas Instruments 产品:Down Converters 射频:52 MHz to 78 MHz 中频:300 MHz LO频率: 功率增益: P1dB: 工作电源电压:1.8 V, 3.3 V 工作电源电流:120 mA 最大功率耗散:1 W 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-128 |
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