參數(shù)資料
型號： LTC3252
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(hù)（/ P的后綴）
文件頁數(shù)： 1/16頁
文件大?。?/td> 239K
代理商： LTC3252
LTC3548
1
3548f
, LTC and LT are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Burst Mode is a registered
trademark of Linear Technology Corporation. Protected by U.S. Patents including 5481178,
6580258, 6304066, 6127815, 6498466, 6611131.
APPLICATIOU
■
PDAs/Palmtop PCs
■
Digital Cameras
■
Cellular Phones
■
Portable Media Players
■
PC Cards
■
Wireless and DSL Modems
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
■
High Efficiency: Up to 95%
■
Very Low Quiescent Current: Only 40
μ
A
■
2.25MHz Constant Frequency Operation
■
High Switch Current: 0.7A and 1.2A
■
No Schottky Diodes Required
■
Low R
DS(ON)
Internal Switches: 0.35
■
Current Mode Operation for Excellent Line
and Load Transient Response
■
Short-Circuit Protected
■
Low Dropout Operation: 100% Duty Cycle
■
Ultralow Shutdown Current: I
Q
< 1
μ
A
■
Output Voltages from 5V down to 0.6V
■
Power-On Reset Output
■
Externally Synchronizable Oscillator
■
Small Thermally Enhanced MSOP and 3mm
×
3mm
DFN Packages
Dual Synchronous,
400mA/800mA, 2.25MHz
Step-Down DC/DC Regulator
The LTC
3548 is a dual, constant frequency, synchronous
step down DC/DC converter. Intended for low power
applications, it operates from 2.5V to 5.5V input voltage
range and has a constant 2.25MHz switching frequency,
allowing the use of tiny, low cost capacitors and inductors
with a profile
≤
1.2mm. Each output voltage is adjustable
from 0.6V to 5V. Internal synchronous 0.35
, 0.7A/1.2A
power switches provide high efficiency without the need
for external Schottky diodes.
A user selectable mode input is provided to allow the user
to trade-off noise ripple for low power efficiency. Burst
Mode
operation provides high efficiency at light loads,
while Pulse Skip Mode provides low noise ripple at light
loads.
To further maximize battery runtime, the P-channel
MOSFETs are turned on continuously in dropout (100%
duty cycle), and both channels draw a total quiescent
current of only 40
μ
A. In shutdown, the device draws <1
μ
A.
LTC3548 Efficiency Curve
Figure 1. 2.5V/1.8V at 400mA/800mA Step-Down Regulators
RUN2
V
IN
V
IN
= 2.8V
TO 5.5V
V
OUT2
= 2.5V
V
= 1.8V
AT 800mA
RUN1
POR
SW1
V
FB1
GND
V
FB2
SW2
MODE/SYNC
LTC3548
10
μ
F
100k
RESET
33pF
68pF
2.2
μ
H
4.7
μ
H
887k
604k
301k
280k
4.7
μ
F
10
μ
F
3548 TA01
LOAD CURRENT (mA)
1
E
100
95
90
85
80
75
70
65
60
P
1000
100
10
1
0.1
10
100
1000
3548 TA02
V
= 3.3V, V
= 1.8V
Burst Mode OPERATION
CHANNEL 1, NO LOAD ON CHANNEL 2
POWER LOSS
EFFICIENCY
相關(guān)PDF資料
PDF描述
LT3407 Dual Synchronous,400mA/800mA, 2.25MHz Step-Down DC/DC Regulator
LT3407-2 Dual Synchronous,400mA/800mA, 2.25MHz Step-Down DC/DC Regulator
LTC3548 12-Bit To 24-Bit Registered Bus Exchanger With 3-State Outputs 56-SSOP -40 to 85
LTC3548EMSE Dual Synchronous,400mA/800mA, 2.25MHz Step-Down DC/DC Regulator
LTC3701EGN 2-Phase, Low Input Voltage, Dual Step-Down DC/DC Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3252EDE 功能描述:IC REG BUCK SWITCHED CAP 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
LTC3252EDE#PBF 功能描述:IC REG BUCK SWITCHED CAP 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
LTC3252EDE#TR 功能描述:IC REG BUCK SWITCHED CAP 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
LTC3252EDE#TRPBF 功能描述:IC REG BUCK SWITCHED CAP 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:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12
LTC3255EDD#PBF 制造商:Linear Technology 功能描述:IC REG BUCK SWITCHED CAP 10-DFN 制造商:Linear Technology 功能描述:IC, STEP DWN CHARGE PUMP, 500KHZ, DFN-10 制造商:Linear Technology 功能描述:DP-Charge Pump/General Purpose, Wide VIN Range Fault Protected 50mA Step-Down Ch
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

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

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

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*