- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄372303 > ST619LBD CPLD Logic IC; Logic Type:Programmable; No. of Macrocells:32; Package/Case:44-PLCC; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No; Mounting Type:Surface Mount RoHS Compliant: No PDF資料下載
參數(shù)資料
| 型號(hào)： | ST619LBD |
| 英文描述： | CPLD Logic IC; Logic Type:Programmable; No. of Macrocells:32; Package/Case:44-PLCC; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No; Mounting Type:Surface Mount RoHS Compliant: No |
| 中文描述： | 模擬IC |
| 文件頁(yè)數(shù)： | 2/6頁(yè) |
| 文件大?。?/td> | 67K |
| 代理商： | ST619LBD |
ST619LB SERIES
2/9
OPERATING PRINCIPLE
The ST619LB is able to provide a regulated 5V
output from a 2V to 3.6V (two battery cells) input.
Internal charge pump and external capacitors
generate the 5V output, eliminating the need for
inductors. The output voltage is regulated to 5V,
±
4% by a pulse skipping controller that turns on
the charge pump when the output voltage begins
to drop. To maintain the greatest efficiency the
internal charge pump of the device operates as a
voltage doubler when V
I
ranges from3.0V to 3.6V
and as a voltage tripler when V
I
ranges from 2.0V
to 2.5V.
When V
I
ranges from 2.5V to 3.0V , the ST619LB
switches between doubler and tripler mode on
alternating cycles,making a 2.5 xV
I
charge pump.
To further enhance the efficiency over the input
range, an internal comparator selects the higher of
V
I
or V
O
to run the ST619LB’s circuitry. With V
I
=
2V and I
O
= 20mA the typical efficiency value is
80%.
In tripler mode (see block diagram), when the S1
switches close, the S2 switches open and
capacitors C1 and C2 charge up to V
I
. On the
second half of thecycle, C1and C2 are connected
in series between IN and OUT when the S1
switches open and S2 switches close. In the
doubler mode only C2 is used. During one
oscillator cycle, energy is transferred from the
input to the charge pump capacitors, and then
from the charge pump capacitors to the output
capacitors and load. The number of cycles within
a given time frame increases as the load
increases
or
as
the
decreases. In the limiting case , the charge pumps
operate continuously, and the oscillator frequency
is nominally 500kHz.
input
supply
voltage
Shut Down Mode
The ST619LB enters low power shut down mode
when SHDN is a logic high. In shut down mode,
OUT is disconnected from the IN and V
O
falls to
0V. The SHDN pin is connected to ground for
normal operation. SHDN is a CMOS compatible
input.
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
THERMAL DATA
(*) This value depends from thermal design of PCB on which the device is mounted.
Symbol
Paramet
er
Value
Unit
V
I
V
O
DC Input Voltage
Output Voltage
Shutdown Input Voltage
Output Current Continuous
-0.3 to 5.5
-0.3 to 5.5
-0.3 to (V
I
+ 0.3)
120
V
V
V
SHDN
I
O
T
stg
T
op
V
mA
°
C
°
C
Storage Temperature Range
Operating Junction Temperature Range
-55 to +150
-40 to +85
Symbol
Parameter
SO-8
DIP-8
Unit
R
thj-amb
Thermal Resistance Junction-ambient (*)
160
100
°
C/W
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST619LBDR | CPLD Logic IC; Logic Type:Programmable; No. of Macrocells:96; Package/Case:84-PLCC; Mounting Type:Surface Mount |
| ST619LBN | CPLD Logic IC; Logic Type:Programmable; No. of Macrocells:64; Package/Case:84-PLCC; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No; Mounting Type:Surface Mount RoHS Compliant: No |
| ST619 | DC-DC CONVERTER REGULATED 5V CHARGE PUMP |
| ST6200T | SONET/SDH Dual Line Interface Transformers for E4/STM-1 Applications. ST6200T - (10/99) |
| ST62E01CD6 | 8-BIT MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST619LBDR | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 Step-Up Charge Pump RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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 |
| ST619LBN | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 Step-up 5 Volt 30mA RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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 |
| ST62 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8/16-Bit Micros |
| ST-6-2 | 制造商:Mac8 功能描述:1 vgtaF0.5mm / D1F1.0mm / D2F1.0mm / D3F0.7mm / F 9mm Gold Over Nickel |
| ST-6-20 | 功能描述:XFRMR PWR 115V 10VAC 2.0A RoHS:是 類別:變壓器 >> 功率 系列:ST 標(biāo)準(zhǔn)包裝:1 系列:260 類型:標(biāo)準(zhǔn) 最大功率:65 VA 主線圈:雙 副線圈:三路，中心抽頭 在某電流時(shí)的串聯(lián)輸出電壓:500 VAC @ 85mA，5 VAC @ 2A，6.3 VAC @ 2A 在某電流時(shí)的并聯(lián)輸出電壓:- 安裝類型:底座安裝 尺寸/尺寸:102.36mm L x 67.31mm W 高度 - 座高（最大）:66.80mm 端接類型:導(dǎo)線引線 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。