參數(shù)資料
型號(hào)： LT3430IFE-1#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： 6.5 A SWITCHING REGULATOR, 120 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 4.40 MM, PLASTIC, TSSOP-16
文件頁(yè)數(shù)： 26/28頁(yè)
文件大小： 321K
代理商： LT3430IFE-1#TR
LT3430/LT3430-1
7
34301fa
BLOCK DIAGRAM
The LT3430/LT3430-1 are constant frequency, current
mode buck converters. This means that there is an in-
ternal clock and two feedback loops that control the duty
cycle of the power switch. In addition to the normal error
amplier, there is a current sense amplier that monitors
switch current on a cycle-by-cycle basis. A switch cycle
starts with an oscillator pulse which sets the RS ip-op
to turn the switch on. When switch current reaches a level
set by the inverting input of the comparator, the ip-op
is reset and the switch turns off. Output voltage control is
obtained by using the output of the error amplier to set
the switch current trip point. This technique means that the
error amplier commands current to be delivered to the
output rather than voltage. A voltage fed system will have
low phase shift up to the resonant frequency of the inductor
and output capacitor, then an abrupt 180° shift will occur.
The current fed system will have 90° phase shift at a much
lower frequency, but will not have the additional 90° shift
until well beyond the LC resonant frequency. This makes
it much easier to frequency compensate the feedback loop
and also gives much quicker transient response.
Most of the circuitry of the LT3430/LT3430-1 operates
from an internal 2.9V bias line. The bias regulator normally
draws power from the regulator input pin, but if the BIAS
pin is connected to an external voltage equal to or higher
than 3V, bias power will be drawn from the external source
(typically the regulated output voltage). This will improve
efciency if the BIAS pin voltage is lower than regulator
input voltage.
High switch efciency is attained by using the BOOST pin
to provide a voltage to the switch driver which is higher
than the input voltage, allowing switch to be saturated.
This boosted voltage is generated with an external ca-
pacitor and diode. Two comparators are connected to the
shutdown pin. One has a 2.38V threshold for undervoltage
lockout and the second has a 0.4V threshold for complete
shutdown.
–
+
–
+
–
+
–
+
Σ
VIN
3, 4
2.9V BIAS
REGULATOR
200kHz: LT3430
100kHz: LT3430-1
OSCILLATOR
FREQUENCY
FOLDBACK
2, 5
FB
SW
GND
1, 8, 9, 16, 17
3430 F01
SLOPE COMP
ANTISLOPE COMP
BIAS
INTERNAL
VCC
SYNC
0.4V
5.5
A
CURRENT
COMPARATOR
RLIMIT
RSENSE
ERROR
AMPLIFIER
gm = 2000Mho
Q2
FOLDBACK
CURRENT
LIMIT
CLAMP
BOOST
RS
FLIP-FLOP
DRIVER
CIRCUITRY
S
R
Q1
POWER
SWITCH
1.22V
10
14
SHDN 15
6
12
相關(guān)PDF資料
PDF描述
LT3430EFE-1#TR 6.5 A SWITCHING REGULATOR, 120 kHz SWITCHING FREQ-MAX, PDSO16
LT3430IFE-1 6.5 A SWITCHING REGULATOR, 120 kHz SWITCHING FREQ-MAX, PDSO16
LT3430EFE-1 6.5 A SWITCHING REGULATOR, 120 kHz SWITCHING FREQ-MAX, PDSO16
LT3467AIDDB#PBF 2.5 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO8
LT3467AIDDB 2.5 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT3430IFEPBF 制造商:Linear Technology 功能描述:Sw. Regulator 3A 200kHz 60V TSSOP16EP
LT3431 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:High Voltage, 3A,500kHz Step-Down Switching Regulator
LT3431EFE 功能描述:IC REG BUCK ADJ 3A 16TSSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:升壓（升壓） 輸出類(lèi)型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開(kāi)關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱(chēng):AS1323-BTTT-30CT
LT3431EFE#PBF 功能描述:IC REG BUCK ADJ 3A 16TSSOP RoHS:是 類(lèi)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(lèi)型:降壓（降壓） 輸出類(lèi)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(lèi)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(chēng):296-25628-2
LT3431EFE#TR 功能描述:IC REG BUCK ADJ 3A 16TSSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:升壓（升壓） 輸出類(lèi)型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開(kāi)關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱(chēng):AS1323-BTTT-30CT
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

*
*
*