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參數(shù)資料
| 型號(hào)： | MAX1559 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 5-Output Power-Management IC For Low-Cost PDAs |
| 中文描述： | 5路輸出電源管理IC，用于低成本PDA |
| 文件頁數(shù)： | 8/14頁 |
| 文件大?。?/td> | 526K |
| 代理商： | MAX1559 |
M
Detailed Description
Linear Regulators
The MAX1559 contains all power blocks and voltage
monitors for a small PDA. Power for logic and other
subsystems are provided by four LDOs:
MAIN
—
Provides 3.3V at a guaranteed 500mA with a
typical current limit of 900mA.
SDIG
—
Provides 3.3V at a guaranteed 400mA for
secure digital cards with a typical current limit
of 630mA.
COR1
—
1V for CPU core guarantees 250mA and a
typical current limit of 450mA.
COR2
—
1.8V for CODEC core guarantees 30mA and
a typical current limit of 50mA.
Note that it may not be possible to draw the rated cur-
rent of MAIN and SDIG at all operating input voltages
due to the dropout limitations of those regulators. The
typical dropout resistance of the MAIN regulator is 0.7
(350mV drop at 500mA), and the typical dropout resis-
tance of the SDIG regulator is 0.85
(340mV drop at
400mA).
5-Output Power-Management IC For
Low-Cost PDAs
8
_______________________________________________________________________________________
Pin Description
PIN
FUNCTION
1
2
COR1
IN
1V, 250mA LDO Output for CPU Core. COR1 turns off when V
IN
< 3V or MAIN < 3.1V.
Input Voltage to the Device. Bypass to GND with a 1μF capacitor.
3.3V, 400mA LDO Output for Secure Digital Card Slot. SDIG has reverse current protection so SDIG
can be biased when no power is present at IN. SDIG output turns off when V
IN
< 3V or when ENSD
goes low.
SDIG Enable Input. Drive ENSD low to turn off SDIG and high to turn on. SDIG cannot be activated
when V
IN
< 3V.
1.25V Reference. Bypass with 0.1μF to GND.
Reset Output.
RS
is an active-low, open-drain output that goes low when V
MAIN
falls below 3.1V.
RS
deasserts when V
MAIN
goes above 3.2V. Connect a 1M
pullup resistor from
RS
to MAIN.
Not Connected
Ground
LCD Boost Switch. Connect to a boost inductor and Schottky diode. See Figure 1.
LCD True Shutdown Switch Output. SW is the power source for the boost inductor. SW turns on when
ENLCD is high. For best efficiency, bypass SW with 4.7μF to GND.
LCD True Shutdown Switch Input. The SWIN-to-SW switch turns off when ENLCD goes low or when
V
IN
< 3V. Connect SWIN to IN.
LCD Feedback Input. Connect LFB to a resistor-divider network between the LCD output and GND.
The feedback threshold is 1.25V.
Enable Input for LCD (Boost Regulator). Drive ENLCD high to activate the LCD boost. Drive ENLCD
low to shut down the LCD output. The LCD cannot be activated when V
IN
< 3V.
Enable Input for Secondary Core LDO (COR2). Drive ENC2 high to turn on COR2 and low to turn off.
COR2 cannot be activated when V
IN
< 3V.
1.8V, 30mA LDO Output for Secondary Core. COR2 turns off when V
IN
< 3V or when ENC2 goes low.
3.3V, 500mA LDO Output for Main Supply. MAIN output turns off when V
IN
< 3V.
3
SDIG
4
ENSD
5
REF
6
RS
7
8
9
N.C.
GND
LX
10
SW
11
SWIN
12
LFB
13
ENLCD
14
ENC2
15
16
COR2
MAIN
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| MAX1559ETE | 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 |
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| 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 |
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