參數(shù)資料
型號(hào)： LTC3528EDDB-2#TRMPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO8
封裝： 3 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-229WECD-1, DFN-8
文件頁(yè)數(shù)： 2/24頁(yè)
文件大小： 0K
代理商： LTC3528EDDB-2#TRMPBF
LTC3528-2
10
35282f
Error Amplifier
The error amplifier is a transconductance type. The nonin-
verting input is internally connected to the 1.20V reference
and the inverting input is connected to FB. Clamps limit
the minimum and maximum error amp output voltage for
improvedlarge-signaltransientresponse.Powerconverter
controlloopcompensationisprovidedinternally.Avoltage
divider from VOUT to ground programs the output voltage
via FB from 1.6V to 5.25V.
VOUT = 1.20V 1+
R2
R1
Current Sensing
Lossless current sensing converts the peak current signal
of the N-channel MOSFET switch into a voltage which
is summed with the internal slope compensation. The
summed signal is compared to the error amplifier output
to provide a peak current control command for the PWM.
Current Limit
The current limit comparator shuts off the N-channel
MOSFET switch once its threshold is reached. The cur-
rent limit comparator delay to output is typically 60ns.
Peak switch current is limited to approximately 1.5A,
independent of input or output voltage, unless VOUT falls
below 0.7V, in which case the current limit is cut in half.
Zero Current Comparator
The zero current comparator monitors the inductor cur-
rent to the output and shuts off the synchronous rectifier
when this current reduces to approximately 20mA. This
prevents the inductor current from reversing in polarity,
improving efficiency at light loads.
Synchronous Rectifier
To control inrush current and to prevent the inductor
current from running away when VOUT is close to VIN, the
P-channel MOSFET synchronous rectifier is only enabled
when VOUT > (VIN + 0.24V).
Anti-Ringing Control
The anti-ringing control connects a resistor across the
inductor to prevent high frequency ringing on the SW pin
duringdiscontinuouscurrentmodeoperation.Theringing
of the resonant circuit formed by L and CSW (capacitance
on SW pin) is low energy, but can cause EMI radiation.
Output Disconnect
The LTC3528-2 is designed to allow true output discon-
nect by eliminating body diode conduction of the internal
P-channel MOSFET rectifier. This allows for VOUT to go to
zero volts during shutdown, drawing no current from the
inputsource.Italsoenablesinrushcurrentlimitingatturn-
on, minimizing surge currents seen by the input supply.
Note that to obtain the advantages of output disconnect,
a Schottky diode cannot be connected between SW and
VOUT. The output disconnect feature also allows VOUT
to be forced above the programmed regulation voltage,
without any reverse current into the input power source.
Thermal Shutdown
If the die temperature exceeds 160°C, the LTC3528-2
enters thermal shutdown. All switches will be turned off
and the soft-start capacitor will be discharged. The device
will be enabled again when the die temperature drops by
approximately 15°C.
Burst Mode OPERATION
The LTC3528-2 will automatically enter Burst Mode op-
eration at light load current and return to fixed frequency
PWM mode when the load increases. Refer to the Typical
Performance Characteristics to see the output load Burst
Mode threshold vs VIN. The load at which Burst Mode
operation is entered can be changed by adjusting the
inductor value. Raising the inductor value will lower the
load current at which Burst Mode operation is entered.
InBurstModeoperation,theLTC3528-2continuesswitch-
ing at a fixed frequency of 2MHz, using the same error
amplifier and loop compensation for peak current mode
control. This control method minimizes output transients
OPERATION (Refer to Block Diagram)
相關(guān)PDF資料
PDF描述
LTC3529EDCB#PBF SWITCHING CONTROLLER, PDSO8
LTC3533EDE#TR 7 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO14
LTC3533EDE 7 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO14
LTC3535EDD#PBF SWITCHING REGULATOR, PDSO12
LTC3538EDCB#PBF 0.8 A SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3528EDDB-PBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:1A, 1MHz Synchronous Step-Up DC/DC Converters in 3mm × 2mm DFN
LTC3528EDDB-TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:1A, 1MHz Synchronous Step-Up DC/DC Converters in 3mm × 2mm DFN
LTC3529EDCB#PBF 制造商:Linear Technology 功能描述:IC SYNC STEP-UP DC/DC CONVERTER DFN-8 制造商:Linear Technology 功能描述:DP-SWREG/Monolithic, Cut Tape 1.5A, 2.35MHz Step-Up DC/DC Converter in 2mm x 3mm 制造商:Linear Technology 功能描述:IC, SYNC STEP-UP DC/DC CONVERTER, DFN-8, Primary Input Voltage:5.25V, No. of Outputs:1, Output Voltage:5V, Output Current:500mA, No. of Pins:8, Operating Temperature Min:-40C, Operating Temperature Max:85C, MSL:MSL 1 - Unlimited , RoHS Compliant: Yes
LTC3529EDCB#TRMPBF 功能描述:IC REG BOOST SYNC 5V 1.5A 8DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開(kāi)關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁(yè)面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2
LTC3529EDCB#TRPBF 功能描述:IC REG BOOST SYNC 5V 1.5A 8DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開(kāi)關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*