- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄44991 > LTC3588EDD-2#TRPBF (LINEAR TECHNOLOGY CORP) 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC3588EDD-2#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類(lèi)： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封裝： | 3 X 3 MM, LEAD FREE, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件頁(yè)數(shù)： | 18/18頁(yè) |
| 文件大?。?/td> | 400K |
| 代理商： | LTC3588EDD-2#TRPBF |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)當(dāng)前第18頁(yè)
LTC3588-2
9
35882fa
operaTion
When the sleep comparator signals that the output has
reached the sleep threshold the buck converter may be
in the middle of a cycle with current still flowing through
the inductor. Normally both synchronous switches would
turn off and the current in the inductor would freewheel
to zero through the NMOS body diode. The LTC3588-2
keeps the NMOS switch on during this time to prevent the
conduction loss that would occur in the diode if the NMOS
were off. If the PMOS is on when the sleep comparator
trips the NMOS will turn on immediately in order to ramp
down the current. If the NMOS is on it will be kept on until
the current reaches zero.
Though the quiescent current when the buck is switching
is much greater than the sleep quiescent current, it is still
a small percentage of the average inductor current which
results in high efficiency over most load conditions. The
buck operates only when sufficient energy has been ac-
cumulated in the input capacitor and the length of time the
converter needs to transfer energy to the output is much
less than the time it takes to accumulate energy. Thus, the
period of time so that the total average quiescent current
is low. This feature accommodates sources that harvest
small amounts of ambient energy.
Four selectable voltages are available by tying the output
select bits, D0 and D1, to GND or VIN2. Table 1 shows the
fourD0/D1codesandtheircorrespondingoutputvoltages.
Table 1. Output Voltage Selection
D1
D0
VOUT
VOUT QUIESCENT CURRENT (IVOUT)
0
3.45V
86nA
0
1
4.1V
101nA
1
0
4.5V
111nA
1
5.0V
125nA
The internal feedback network draws a small amount of
current from VOUT as listed in Table 1.
Power Good Comparator
Apowergoodcomparatorproducesalogichighreferenced
to VOUT on the PGOOD pin the first time the converter
reaches the sleep threshold of the programmed VOUT,
signaling that the output is in regulation. The PGOOD pin
will remain high until VOUT falls to 92% of the desired
regulation voltage. Several sleep cycles may occur during
this time. Additionally, if PGOOD is high and VINfallsbelow
the UVLO falling threshold, PGOOD will remain high until
VOUT falls to 92% of the desired regulation point. This
allows output energy to be used even if the input is lost.
Figure 2 shows the behavior for VOUT = 5V and a 10A
load. At t = 2s VIN becomes high impedance and is dis-
charged by the quiescent current of the LTC3588-2 and
through servicing VOUT which is discharged by its own
leakage current. VIN crosses UVLO falling but PGOOD
remains high until VOUT decreases to 92% of the desired
regulation point. The PGOOD pin is designed to drive a
microprocessor or other chip I/O and is not intended to
drive higher current loads such as an LED.
The D0/D1 inputs can be switched while in regulation as
shown in Figure 3. If VOUTisprogrammedtoavoltagewith
a PGOOD falling threshold above the old VOUT, PGOOD will
TIME (sec)
0
VOL
TAGE
(V)
20
14
16
18
12
4
6
8
2
10
0
10
8
35882 F02
12
4
2
6
CIN = 10F,
COUT = 47F,
ILOAD = 10A
VIN = UVLO FALLING
VOUT
VIN
PGOOD
Figure 2. PGOOD Operation During Transition to UVLO
Figure 3. PGOOD Operation During D0/D1 Transition
TIME (ms)
0
V OUT
VOL
TAGE
(V)
6
5
4
3
2
1
0
18
16
14
12
10
8
6
4
2
35882 F03
20
COUT = 100F, ILOAD = 100mA
VOUT
PGOOD = LOGIC 1
D1=D0=0
D1=D0=1
D1=D0=0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC3588EMSE-2#PBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| LTC3588EMSE-2#TRPBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| LTC3588EDD-2#PBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| LTC3588IMSE-2#PBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| LTC3588IDD-2#PBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3588EMSE-1#PBF | 功能描述:IC ENERGY HARVESTING PSU 10MSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 電源管理 - 專(zhuān)用 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:熱電冷卻器 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:28-SOIC（0.173"，4.40mm 寬）裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:28-TSSOP 裸露焊盤(pán) 包裝:管件 產(chǎn)品目錄頁(yè)面:1410 (CN2011-ZH PDF) |
| LTC3588EMSE-1#PBF | 制造商:Linear Technology 功能描述:PIEZOELECTRIC ENERGY HARVESTING POWER SU 制造商:Linear Technology 功能描述:IC ENERGY HARVESTING POWER SUPPLY MSOP10 |
| LTC3588EMSE-1#TRPBF | 功能描述:IC ENERGY HARVESTING PSU 10MSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 電源管理 - 專(zhuān)用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱(chēng):LP3905SD-30DKR |
| LTC3588EMSE-1PBF | 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Piezoelectric Energy Harvesting Power Supply |
| LTC3588EMSE-1TRPBF | 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Piezoelectric Energy Harvesting Power Supply |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。