參數(shù)資料
型號： MAX1559ETE
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 電源管理
英文描述： 5-Output Power-Management IC For Low-Cost PDAs
中文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, QCC16
封裝： 4 X 4 MM, 0.8 MM HEIGHT, MO-220-WGGC, TQFN-16
文件頁數(shù)： 10/14頁
文件大?。?/td> 526K
代理商： MAX1559ETE
M
than 1% error, the current through R2 should be greater
than 100 times the feedback input bias current (I
FB
).
LCD Adjustment
The LCD boost output can be digitally adjusted by
either a DAC or PWM signal.
DAC Adjustment
Adding a DAC and a resistor, R
D,
to the divider-circuit
(Figure 4) provides DAC adjustment of V
OUT
. Ensure
that V
OUT(MAX)
does not exceed the LCD panel rating.
The output voltage (V
OUT
) as a function of the DAC
voltage (V
DOUT
) can be calculated using the following
formula:
Using a PWM Signal
Many microprocessors have the ability to create PWM
outputs. These are digital outputs, based on either 16-bit
or 8-bit counters, with a programmable duty cycle. In
many applications, they are suitable for adjusting the
output of the MAX1559 as seen in Figure 1
.
V
V
R
R
V
V
R
R
)
OUT
REF
REF
DOUT
D
=
+
+
1
1
2
1
(
5-Output Power-Management IC For
Low-Cost PDAs
10
______________________________________________________________________________________
MAX1559
MAX1551
MAIN
SD
SW
LX
LFB
GND
IN
SWIN
REF
BATT
DC
USB
PG
GND
POK LOW WHEN
EITHER USB OR DC
IS ABOVE UV AND
ABOVE BATT
C10
0.1
μ
F
ENSD
3.3V, 500mA
MAIN POWER
C2
4.7
μ
F
C3
4.7
μ
F
C4
4.7
μ
F
C6
4.7
μ
F
R1
1.5M
R2
100k
C7
1
μ
F
C8
47pF
C5
1
μ
F
3.3V, 400mA
SD CARD SLOT
1V, 250mA
CPU CORE 1
1.8V, 30mA
CORE 2
LCD
15V
L1
10
μ
H
MURATA
LQH3C
ENC2
ENLCD
RESET OUT
RS
COR1
COR2
TO MAIN
1
μ
F
1
μ
F
AC ADAPTER
INPUT
3.5V TO 7V
USB INPUT
3.5V TO 6.0V
ON
OFF
R3
1M
C1
1
μ
F
1
μ
F
TO MAIN
POWER
PRESENT
(EITHER DC
OR USB)
C9
22nF
CONNECTION FOR
PWM-CONTROLLED
LCD BIAS
LCD OFF
SWITCH
LCD
BOOST
REF
Figure 1. Typical Operating Circuit with Charger and External PWM LCD Control
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參數(shù)描述
MAX1559ETE-T 功能描述:PMIC 解決方案 Complete PMIC for PDAs RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
MAX155ACPI 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
MAX155ACPI+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit 8Ch 250ksps 2.5V Precision 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
MAX155ACWI 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
MAX155ACWI+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit 8Ch 250ksps 2.5V Precision 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
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