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| 型号： | LT3970EMS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/22页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 0.35A 10MSOP |
| 标准包装： | 50 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.21 V ~ 25 V |
| 输入电压： | 4.2 V ~ 40 V |
| PWM 型： | 电流模式，Burst Mode? |
| 频率 - 开关： | 200kHz ~ 2.25MHz |
| 电流 - 输出： | 350mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 10-MSOP |
| 产品目录页面： | 1332 (CN2011-ZH PDF) |
LT3970 Series
40V, 350mA Step-Down
Regulator with 2.5μA
Quiescent Current and
Integrated Diodes
Low Ripple Burst Mode ? Operation
Wide Input Voltage Range: 4.2V to 40V Operating
Adjustable Switching Frequency: 200kHz to 2.2MHz
Integrated Boost and Catch Diodes
350mA Output Current
Fixed Output Voltages: 3.3V, 3.42V, 5V
Accurate 1V Enable Pin Threshold
Low Shutdown Current: I Q = 0.7μA
Internal Sense Limits Catch Diode Current
Power Good Flag
Output Voltage: 1.21V to 25V
Internal Compensation
Small 10-Pin MSOP and (3mm × 2mm) DFN Packages
Automotive Battery Regulation
Power for Portable Products
Industrial Supplies
FEATURES
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2.5μA I Q at 12V IN to 3.3V OUT
Output Ripple < 5mV P-P
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1.8μA I Q at 12V IN
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APPLICATIONS
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TYPICAL APPLICATION
5V Step-Down Converter
DESCRIPTION
The LT ? 3970 is an adjustable frequency monolithic buck
switching regulator that accepts a wide input voltage
range up to 40V, and consumes only 2.5μA of quiescent
current. A high efficiency switch is included on the die
along with the catch diode, boost diode, and the neces-
sary oscillator, control and logic circuitry. Low ripple Burst
Mode operation maintains high efficiency at low output
currents while keeping the output ripple below 5mV in a
typical application. Current mode topology is used for fast
transient response and good loop stability. A catch diode
current limit provides protection against shorted outputs
and overvoltage conditions. An enable pin with accurate
threshold is available, producing a low shutdown current
of 0.7μA. A power good flag signals when V OUT reaches
90% of the programmed output voltage. The LT3970 is
available in small 10-pin MSOP and 3mm × 2mm DFN
packages.
L , LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
Efficiency
V IN
6V TO 40V
V IN
BOOST
0.22μF
90
80
V IN = 12V
1000
100
OFF ON
EN
PG
LT3970
SW
BD
22μH
V OUT
5V
350mA
70
10
2.2μF
226k
RT
GND
FB
22pF
1M
316k
22μF
60
50
1
0.1
f = 600kHz
3490 TA01a
40
0.01
0.1
1 10
100
0.01
1
LOAD CURRENT (mA)
3970 TA01b
3970fc
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3970EMS-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:40V, 350mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes |
| LT3970HMS#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK ADJ 0.35A 10MSOP 制造商:Linear Technology 功能描述:IC, STEP DOWN REG, 200KHZ-2.2MHZ, MSOP10 制造商:Linear Technology 功能描述:SWITCHING REG, BUCK, ADJ, 2.2MHZ, MSOP10, Primary Input Voltage:40V, No. of Outputs:1, Output Current:350mA, No. of Pins:10, Operating Temperature Min:-40C, Operating Temperature Max:150C, Package / Case:10-MSOP , RoHS Compliant: Yes |
| LT3970HMS#TRPBF | 制造商:Linear Technology 功能描述:IC REG BUCK ADJ 0.35A 10MSOP 制造商:Linear Technology 功能描述:SWITCHING REG, BUCK, ADJ, 2.2MHZ, MSOP10, Primary Input Voltage:40V, No. of Outputs:1, Output Current:350mA, No. of Pins:10, Operating Temperature Min:-40C, Operating Temperature Max:150C, Package / Case:10-MSOP , RoHS Compliant: Yes |
| LT3970HMS-3.3#PBF | 功能描述:IC REG BUCK 3.3V 0.35A 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT3970HMS-3.3#TRPBF | 功能描述:IC REG BUCK 3.3V 0.35A 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
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