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| 型号： | LT3682EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1A 12DFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 20 V |
| 输入电压： | 3.6 V ~ 36 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 250kHz ~ 2.2MHz |
| 电流 - 输出： | 1A |
| 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： | 12-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 12-DFN |
LT3682
1A Micropower Step-Down
Switching Regulator
FEATURES
DESCRIPTION
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Wide Input Range:
Operation from 3.6V to 36V
Overvoltage Lockout Protects Circuits through
60V Transients
1A Output Current
Low Ripple Burst Mode ? Operation
I Q = 75μA at 12V IN to 3.3V OUT
Output Ripple < 15mV P-P
Adjustable Switching Frequency: 250kHz to 2.2MHz
Short-Circuit Protected
Synchronizable Between 300kHz and 2.2MHz
0.8V Feedback Reference Voltage
Output Voltage 0.8V to 20V
Soft-Start Capability
Power Good Flag
Small 12-Pin Thermally Enhanced 3mm × 3mm
DFN Package
The LT ? 3682 is an adjustable frequency (250kHz to
2.2MHz) monolithic buck switching regulator that accepts
input voltages up to 36V. A high ef?ciency 0.5Ω switch is
included on the device along with a boost diode and the
necessary oscillator, control, and logic circuitry. Current
mode topology is used for fast transient response and good
loop stability. A SYNC pin allows the user to synchronize the
part to an external clock, and to choose between Low Ripple
Burst Mode operation and standard PWM operation.
The Low Ripple Burst Mode maintains high ef?ciency at
low output currents while keeping output ripple below
15mV in typical applications. Shutdown reduces input
supply current to less than 1μA while a resistor and
capacitor on the RUN/SS pin provide a controlled output
voltage ramp (soft-start). A power good ?ag signals when
V OUT reaches 90% of the programmed output voltage.
Protection circuitry senses the current in the power switch
and external Schottky catch diode to protect the LT3682
Automotive Battery Regulation
Automotive Entertainment Systems
Industrial Supplies
Power for Portable Products
APPLICATIONS
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against short-circuit conditions. Frequency foldback and
thermal shutdown provide additional protection.
The LT3682 is available in a 12-Pin 3mm × 3mm DFN with
exposed pad for low thermal resistance.
L , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst Mode
is a trademark of Linear Technology Corporation. All other trademarks are the property of their
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Distributed Supply Regulation
respective owners.
TYPICAL APPLICATION
5V Step-Down Converter
Ef?ciency
V IN
6.9V TO 36V
TRANSIENT TO 60V
V IN
BD
V OUT
5V
0.9A, V IN
1A, V IN
6.9V
12V
100
90
V OUT = 5V
2.2μF
16.2k
ON OFF
RUN/SS
V C
R T
LT3682
BOOST
SW
0.22μF
10μH
80
70
V OUT = 3.3V
470pF
40.2k
PG
SYNC
GND
PGND
DA
FB
102k
536k
10μF
60
50
V IN = 12V
L = 10μH
f = 800 kHz
f = 800kHz
3682 TA01
0
0.2
0.4 0.6
LOAD CURRENT (A)
0.8
1
3682 TA01b
3682f
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3682IDD#PBF | 功能描述:IC REG BUCK ADJ 1A 12DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:MIC23xxx HyperLight Load™ Regulators 标准包装:5,000 系列:HyperLight Load® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.8V 输入电压:2.7 V ~ 5.5 V PWM 型:混合物 频率 - 开关:4MHz 电流 - 输出:2A 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:8-VFDFN 裸露焊盘，8-MLF? 包装:带卷 (TR) 供应商设备封装:8-MLF?（2x2） 产品目录页面:1094 (CN2011-ZH PDF) 其它名称:576-3303-2 |
| LT3682IDD#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 2.2MHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, 2.2MHZ, DFN-12 |
| LT3682IDD#TRPBF | 功能描述:IC REG BUCK ADJ 1A 12DFN 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 |
| LT3682IDD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1A Micropower Step-Down |
| LT3682IDD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1A Micropower Step-Down |
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