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參數(shù)資料
| 型號： | LTC3458 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 8位微控制器 |
| 英文描述： | ECONOLINE: RSZ/P - 1kVDC |
| 中文描述： | ECONOLINE：RSZ / P - 1kVDC 2kVDC隔離UL94V - 0封裝材料所需的散熱片，無外置。組件所需的環(huán)形磁ContinuousShort電路保護（/ P的后綴） |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 389K |
| 代理商： | LTC3458 |
LTC3458L
8
3458lf
Detailed Description
The LTC3458L provides high efficiency, low noise power
for boost applications with output voltages up to 6V. The
true output disconnect feature eliminates inrush current,
and allows V
OUT
to go to zero during shutdown. The
current mode architecture with adaptive slope compensa-
tion provides ease of loop compensation with excellent
transient load response. The low R
DS(ON)
, low gate charge
synchronous switches eliminate the need for an external
Schottky rectifier, and provide efficient high frequency
pulse width modulation (PWM) control. High efficiency is
achieved at light loads when Burst Mode operation is
entered, where the IC’s quiescent current is a low 12
μ
A
typical on V
IN
. The LTC3458L is designed to provide
custom performance in a variety of applications with
programmable feedback, current limit, oscillator frequency,
soft-start, and Burst Mode threshold.
BLOCK DIAGRA
PGND
PGND
V
BEST
V
BEST
V
SELECT
3
6
9
OSC/SYNC
MAX
DUTY
SYNC
GND
I
LIM
PGND
SS
COMP
SHDN
R
T
V
IN
V
IN
V
IN
2
SW
V
OUT
FB
BURST
PWM
AND
BURST MODE
DRIVE LOGIC
P-DRIVE
P-DRIVE
P-DRIVE
N-DRIVE
N-DRIVE
N-DRIVE
I
DETECT
BURST MODE
CONTROL
FIXED
FREQUENCY
BURST MODE
MUX
SOFT-START
THERMAL SD
4%
UNDERVOLTAGE
REFERENCE/
BIAS
PEAK CURRENT
COMPARATOR
I
COMP
, I
LIMIT
,
I
,
SLOPE COMP
SLEEP
SLEEP
CONTROL
MODE
MODE
MODE
I
COMP/LIMIT_PEAK
I
BURST_PEAK
SLOPE
SLOPE
SLEEP TO
ALL BLOCKS
I_SENSE
BURST ACTIVE
(DISABLED IN
BURST MODE)
+
–
+
–
TSD
5
13
10
8
4
11
1
12
7
ANTIRING
SW1
UNDER
UNDER
SD
TO ALL BLOCKS
SDB
I
P
C
BIAS
CURRENTS
UVLO
I
ZERO
3458L BD
ERROR AMPLIFIER/
BURST COMPARATOR
APPLICATIOU
W
U
U
LTC3458L Programmable Functions
Current Limit (I
LIMIT
)/Peak Burst Current (I
BURSTPEAK
).
The programmable current limit circuit sets the maximum
peak current in the internal N-channel MOSFET switch.
This clamp level is programmed using a resistor to ground
on I
LIM
. In Burst Mode operation, the current limit is
automatically set to ~1/4 of the programmed current limit
for optimal efficiency. An 84.5k R
ILIM
resistor is recom-
mended in most applications unless a lower limit is
needed to prevent the external inductor from saturating.
I
R
LIMIT
=
180
I is in amps and R is in k
.
I
I
BURSTPEAK
LIM
≈
1
4
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| LTC3458EDE | 功能描述:IC REG BOOST SYNC ADJ 1.4A 12DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 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，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LTC3458EDE#PBF | 功能描述:IC REG BOOST SYNC ADJ 1.4A 12DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(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)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LTC3458EDE#TRPBF | 功能描述:IC REG BOOST SYNC ADJ 1.4A 12DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 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，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LTC3458L | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect |
| LTC3458LEDE | 功能描述:IC REG BOOST SYNC ADJ 1.4A 12DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 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，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
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