- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377697 > LT1312 (Linear Technology Corporation) PCMCIA Driver/Regulator(PCMCIA（個(gè)人計(jì)算機(jī)存儲(chǔ)卡國(guó)際協(xié)會(huì)）驅(qū)動(dòng)器/穩(wěn)壓器) PDF資料下載
參數(shù)資料
| 型號(hào)： | LT1312 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | PCMCIA Driver/Regulator(PCMCIA（個(gè)人計(jì)算機(jī)存儲(chǔ)卡國(guó)際協(xié)會(huì)）驅(qū)動(dòng)器/穩(wěn)壓器) |
| 中文描述： | PCMCIA驅(qū)動(dòng)程序/穩(wěn)壓器（使用PCMCIA（個(gè)人計(jì)算機(jī)存儲(chǔ)卡國(guó)際協(xié)會(huì)）驅(qū)動(dòng)器/穩(wěn)壓器） |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 223K |
| 代理商： | LT1312 |
8
LT1312
APPLICATIO
S I
N
FOR
ATIO
U
inductor as shown in Figure 3. MOSFET Q4 and diode D4
have been added and diode D1 is no longer used. In the
previous circuit, power is drawn directly from the batteries
through D1, when the LTC1142 is in Burst Mode operation
and the VPP pin requires 3.3V or 5V. For these lower input
voltages this technique is no longer valid as the input will
fall below the LT1312 regulator’s dropout voltage. To
correct for this situation, the additional switch Q4 forces
the switching regulator
into continuous mode operation
whenever 3.3V, 5V or 12V
is selected.
W
U
on this line that may damage sensitive PCMCIA flash
memory cards if applied directly to the VPP pins.
Flash Memory Card VPP Power Considerations
PCMCIA compatible flash memory cards require tight
regulation of the 12V VPP programming supply to ensure
that the internal flash memory circuits are never subjected
to damaging conditions. Flash memory circuits are typi-
cally rated with an absolute maximum of 13.5V and VPP
must be maintained at 12V
±
5% under all possible load
conditions during erase and program cycles. Undervoltage
can decrease specified flash memory reliability and over-
voltage can damage the device
1
.
Generating 14V from 5V or 12V
It is important that the 12V VPP supply for the two VPP
lines to the card be free of voltage spikes. There should be
little or no overshoot during transitions to and from the
12V level.
LINE POWERED SUPPLIES
In line operated products such as: desktop computers,
dedicated PC card readers/writers, medical equipment,
test and measurement equipment, etc., it is possible to
derive power from a relatively “raw” source such as a 5V
or 12V power supply. The 12V supply line in a desktop
computer however, is usually too “dirty” to apply directly
to the VPP pins of a PCMCIA card socket. Power supply
switching and load transients may create voltage spikes
1
See Application Note AP-357, “Power Supply Solutions for Flash Memory,”
Intel Corporation, 1992.
D2
MBRS1100
D3
MBRS130T3
Q3
VN7002
V
5.4V TO 12V
C4
1000pF
C2
1000pF
C3
220μF
C1
68μF
C5
22μF
3.3V
OUTPUT
FROM CARD
V
CC
PIN
Q1
24
23
6
1
28
EN0
EN1
VALID
*LPE-6582-A086 DALE (605) 665-9301
14V AUXILIARY SUPPLY
T1
3.38T
22μH*
Q2
R4
22
R1
100
R3
18k
R2
100
R4
0.033
D4
18V
LT1312 F3
+
Q4
VN7002
+
+
+
V
S
EN0
TO CARD VPP PIN
0V, 3.3V, 5V, 12V OR Hi-Z
VPP
OUT
LT1312
EN1
VALID
SENSE
GND
1μF
1/2 LTC1142
3.3V REG
V
IN
PDRIVE
NDRIVE
SENSE
+
SENSE
–
Figure 3. Deriving Auxiliary 14V Power from an LTC1142 3.3V Regulator
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1316CS8 | Micropower DC/DC Converter with Programmable Peak Current Limit |
| LT1316CMS8 | Micropower DC/DC Converter with Programmable Peak Current Limit |
| LT1316 | 8-Bit Identity/Magnitude Comparators (P=Q) with Enable 20-SOIC 0 to 70 |
| LT1316IS8 | SPDT, 1/4 Amp Two Circuit Pushbutton |
| LT1317BIS8 | Micropower, 600kHz PWM DC/DC Converters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1312CS8 | 功能描述:IC DRVR/REG PCMCIA VPP SNGL8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數(shù):2 輸出電壓:最低可調(diào)至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:30-TSSOP 包裝:帶卷 (TR) |
| LT1313 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual PCMCIA VPP Driver/Regulator |
| LT1313CS | 功能描述:IC DRV/REG PCMCIA VPP DUAL16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數(shù):2 輸出電壓:最低可調(diào)至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:30-TSSOP 包裝:帶卷 (TR) |
| LT1313CS#PBF | 功能描述:IC DRV/REG PCMCIA VPP DL 16SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| LT1313CS#TR | 功能描述:IC DRIVER/REG VPP PCMCIA 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。