- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383335 > MAX1779 (Maxim Integrated Products, Inc.) 32-Bit Digital Signal Controller with ROM 100-LQFP -40 to 125 PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX1779 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 32-Bit Digital Signal Controller with ROM 100-LQFP -40 to 125 |
| 中文描述： | 低功耗、三輸出TFT LCD DC-DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 10/18頁 |
| 文件大?。?/td> | 503K |
| 代理商： | MAX1779 |
M
Low-Power Triple-Output TFT LCD DC-DC
Converter
10
______________________________________________________________________________________
(V
C3
+ V
SUPP
), charge flows from C3 to C4 until the
diode (D3) turns off.
Soft-Start
The main boost regulator does not have soft-start.
For the charge pumps, soft-start is achieved by control-
ling the rise rate of the output voltage. The output volt-
age regulates within 16ms, regardless of output
capacitance and load, limited only by the regulator
’
s
output impedance (see the Startup Waveforms in the
Typical Operating Characteristics
).
Shutdown
A logic-low level on
SHDN
disables all three MAX1779
converters and the reference. When shut down, the
supply current drops to 0.1μA to maximize battery life
and the reference is pulled to ground. The output
capacitance and load current determine the rate at
which each output voltage will decay. A logic-level high
on
SHDN
activates the MAX1779 (see
Power-Up
Sequencing
). Do not leave
SHDN
floating. If unused,
connect
SHDN
to IN.
Power-Up Sequencing
Upon power-up or exiting shutdown, the MAX1779
starts a power-up sequence. First, the reference pow-
ers up. Then the main DC-DC step-up converter pow-
ers up. Once the main boost converter reaches
regulation, the negative charge pump turns on. When
the negative output voltage reaches approximately 90%
of its nominal value (V
FBN
< 120mV), the positive
charge pump starts up. Finally, when the positive out-
put voltage reaches 90% of its nominal value (V
FBP
>
LX
GND
PGND
1.25V
R2
V
IN
= 2.7V TO 5.5V
L1
IN
R1
Q
R
S
OSC
REF
FB
V
MAIN
(UP TO 13V)
V
OUT
=
[1 + (R1 / R2)] x V
REF
V
REF
= 1.25V
I
LIM
C1
C2
C
COMP
R
COMP
D1
INTG
+
+
-
+
-
-
MAX1779
Gm
+ -
C
INTG
+
-
SLOPE
COMP
+
+
Σ
Figure 1. PWM Boost Converter Block Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1779EUE | 32-Bit Digital Signal Controller with ROM 100-LQFP -40 to 125 |
| MAX177CNG | 32-Bit Digital Signal Controller with ROM 100-BGA MICROSTAR -40 to 85 |
| MAX177EWG | CMOS 10-Bit A/D Converter with Track-and-Hold |
| MAX177MRG | RECTIFIER 6A 600V R-6 |
| MAX177CWG | 32-Bit Digital Signal Controller with ROM 100-BGA MICROSTAR -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1779EUE | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1779EUE+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Triple-Output TFT LCD RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1779EUE+T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Triple-Output TFT LCD RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1779EUE-T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX177C/D | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。