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参数资料
| 型号： | LT3990IMSE-5#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 16MSOP |
| 标准包装： | 37 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1.21 V ~ 25 V |
| 输入电压： | 4.2 V ~ 62 V |
| PWM 型： | 电流模式，Burst Mode? |
| 频率 - 开关： | 210kHz ~ 2.3MHz |
| 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： | 16-TFSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 16-MSOP，裸露焊盘 |
LT3990/LT3990-3.3/LT3990-5
62V, 350mA Step-Down
Regulator with 2.5μA
Quiescent Current and
Integrated Diodes
Low Ripple Burst Mode ? Operation
Wide Input Voltage Range: 4.2V to 62V Operating
Adjustable Switching Frequency: 200kHz to 2.2MHz
Integrated Boost and Catch Diodes
350mA Output Current
Fixed Output Voltages: 3.3V, 5V
Accurate Programmable Undervoltage Lockout
FMEA Fault Tolerant (MSOP Package)
Low Shutdown Current: I Q = 0.7μA
Internal Sense Limits Catch Diode Current
Power Good Flag
Small, Thermally Enhanced 16-Pin MSOP
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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2μA I Q at 12V IN
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Output Stays at or Below Regulation Voltage During
Adjacent Pin Short or When a Pin is Left Floating
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and (3mm × 3mm) DFN Packages
APPLICATIONS
DESCRIPTION
The LT ? 3990 is an adjustable frequency monolithic buck
switching regulator that accepts a wide input voltage
range up to 62V, 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 accurate programmable
undervoltage lockout feature 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
LT3990 is available in small, thermally enhanced 16-pin
MSOP and 3mm × 3mm 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.
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Automotive Battery Regulation
Power for Portable Products
Industrial Supplies
TYPICAL APPLICATION
Power Loss
5V Step-Down Converter
1000
V IN = 12V
V IN
6.5V TO 62V
V IN
BOOST
0.22μF
100
10
OFF ON
LT3990-5
EN/UVLO SW
PG BD
33μH
V OUT
5V
350mA
1
2.2μF
374k
RT
GND
V OUT
22μF
0.1
f = 400kHz
3990 TA01a
0.01
0.001
0.01
0.1 1 10
100
LOAD CURRENT (mA)
3990 TA01b
3990fa
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3990IMSEPBF | 制造商:Linear Technology 功能描述:62V 350mA Buck Regulator 2.5uA MSOP16EP |
| LT3990IMSPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:60V, 350mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes |
| LT3990IMSTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:60V, 350mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes |
| LT3991 | 制造商:LINER 制造商全称:Linear Technology 功能描述:55V, 1.2A Step-Down Regulator with 2.8 Quiescent Current |
| LT3991EDD#PBF | 功能描述:IC REG BUCK ADJ 1.2A 10DFN 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:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
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