參數(shù)資料
型號(hào)： LT1938IDD#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 4 A SWITCHING REGULATOR, 3300 kHz SWITCHING FREQ-MAX, PDSO10
封裝： 3 X 3 MM, LEAD FREE, PLASTIC, MO-229WEED-2, DFN-10
文件頁數(shù)： 1/24頁
文件大?。?/td> 260K
代理商： LT1938IDD#PBF
LT1938
1
1938fa
25V, 2.2A, 2.8MHz
Step-Down
Switching Regulator
The LT1938 is an adjustable frequency (300kHz to
2.8MHz) monolithic buck switching regulator that accepts
input voltages up to 25V. A high efficiency 0.18Ω switch
is included on the die along with a boost Schottky diode
and the necessary oscillator, control and logic circuitry.
Current mode topology is used for fast transient response
and good loop stability. The LT1938’s high operating fre-
quency allows the use of small, low cost inductors and
ceramic capacitors resulting in low output ripple while
keeping total solution size to a minimum. The low current
shutdown mode reduces input supply current to less than
1A while a resistor and capacitor on the RUN/SS pin
provide a controlled output voltage ramp (soft-start). A
power good flag signals when VOUT reaches 90% of the
programmed output voltage. The LT1938 is available in
a 3mm × 3mm DFN package with Exposed Pad for low
thermal resistance.
■
Automotive Battery Regulation
■
Power for Portable Products
■
Distributed Supply Regulation
■
Industrial Supplies
■
Wall Transformer Regulation
■
Wide Input Voltage Range: 3.6V to 25V
■
2.2A Maximum Output Current
■
Adjustable Switching Frequency: 300kHz to 2.8MHz
■
Low Shutdown Current: IQ < 1A
■
Integrated Boost Diode
■
Power Good Flag
■
Saturating Switch Design: 0.18Ω On-Resistance
■
1.265V Feedback Reference Voltage
■
Output Voltage: 1.265V to 20V
■
Soft-Start Capability
■
Small 10-Pin Thermally Enhanced (3mm × 3mm)
DFN Package
3.3V Step-Down Converter
Efficiency (VOUT = 3.3V)
FEATURES
DESCRIPTION
APPLICATIONS
TYPICAL APPLICATION
SW
BIAS
FB
VC
PG
RT
VIN
BD
VIN
4.5V TO
25V
VOUT
3.3V
2.2A
4.7F
0.47F
680pF
22F
200k
16.2k
60.4k
4.7H
324k
GND
OFF ON
LT1938
1938 TA01
RUN/SS
BOOST
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
LOAD CURRENT (A)
0
EFFICIENCY
(%)
70
75
80
85
90
1.6
1938 G02
65
60
55
50
0.2 0.4 0.6 0.8 1.0 1.2 1.4
1.8
2.2
2.0
VIN = 12V
VIN = 7V
VIN = 24V
L: NEC PLC-0745-4R7
f = 800kHz
相關(guān)PDF資料
PDF描述
LT1956-5EGN 3 A SWITCHING REGULATOR, 570 kHz SWITCHING FREQ-MAX, PDSO16
LT1956-5IGN 3 A SWITCHING REGULATOR, 570 kHz SWITCHING FREQ-MAX, PDSO16
LT1961IMS8E#TR 3 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO8
LT3092ITS8#PBF SPECIALTY ANALOG CIRCUIT, PDSO8
LT3092ETS8#TRPBF SPECIALTY ANALOG CIRCUIT, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1939 制造商:LINER 制造商全稱:Linear Technology 功能描述:Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller
LT1939EDD#PBF 功能描述:IC REG DL BUCK/LINEAR 12DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 + 切換式 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 拓?fù)?降壓（降壓）同步（3），線性（LDO）（2） 功能:任何功能 輸出數(shù):5 頻率 - 開關(guān):300kHz 電壓/電流 - 輸出 1:控制器 電壓/電流 - 輸出 2:控制器 電壓/電流 - 輸出 3:控制器 帶 LED 驅(qū)動(dòng)器:無 帶監(jiān)控器:無 帶序列發(fā)生器:是 電源電壓:5.6 V ~ 24 V 工作溫度:-40°C ~ 85°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:*
LT1939EDD#TRPBF 功能描述:IC REG DL BUCK/LINEAR 12DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 + 切換式 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 拓?fù)?降壓（降壓）同步（3），線性（LDO）（2） 功能:任何功能 輸出數(shù):5 頻率 - 開關(guān):300kHz 電壓/電流 - 輸出 1:控制器 電壓/電流 - 輸出 2:控制器 電壓/電流 - 輸出 3:控制器 帶 LED 驅(qū)動(dòng)器:無 帶監(jiān)控器:無 帶序列發(fā)生器:是 電源電壓:5.6 V ~ 24 V 工作溫度:-40°C ~ 85°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:*
LT1939EDD-PBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller
LT1939EDD-TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller
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(hào)，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(tái)，查看報(bào)價(jià)

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(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

我的聯(lián)系方式

*
*
*