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| 型号： | LT3685IDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 10DFN |
| 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： | 0.79 V ~ 20 V |
| 输入电压： | 3.6 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 2.4MHz |
| 电流 - 输出： | 2A |
| 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-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-DFN（3x3） |
LT3685
36V, 2A, 2.4MHz Step-Down
Switching Regulator
FEATURES
DESCRIPTION
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Wide Input Range:
Operation From 3.6V to 36V
Overvoltage Lockout Protects Circuit through
60V Transients
2A Maximum Output Current
Adjustable Switching Frequency: 200kHz to 2.4MHz
Low Shutdown Current: I Q < 1μA
Integrated Boost Diode
Synchronizable Between 250kHz to 2MHz
Power Good Flag
Saturating Switch Design: 0.25 On-Resistance
0.790V Feedback Reference Voltage
Output Voltage: 0.79V to 20V
Soft-Start Capability
Small 10-Pin Thermally Enhanced MSOP and
(3mm × 3mm) DFN Packages
The LT ? 3685 is an adjustable frequency (200kHz to 2.4MHz)
monolithic step-down switching regulator that accepts
input voltages up to 38V operating and 60V maximum. An
internal overvoltage protection circuit turns off the power
switch when V IN is above 38V typical (36V minimum) which
then allows the part to safely withstand 60V transients. A
high ef?ciency 0.25 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 LT3685’s high operating frequency allows the use of
small, low cost inductors and ceramic capacitors result-
ing in low output ripple while keeping total solution size
to a minimum. The low current shutdown mode 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
APPLICATIONS
V OUT reaches 89% of the programmed output voltage. The
LT3685 is available in 10-Pin MSOP and 3mm × 3mm DFN
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Automotive Battery Regulation
Set Top Box
Distributed Supply Regulation
Industrial Supplies
Wall Transformer Regulation
packages with exposed pads for low thermal resistance.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
TYPICAL APPLICATION
3.3V Step-Down Converter
Ef?ciency
V IN
4.5V TO 36V
V OUT
3.3V
100
TRANSIENT
TO 60V
4.7μF
OFF ON
14k
V IN
RUN/SS
V C
LT3685
BD
BOOST
SW
0.47μF 4.7μH
2A
90
80
V OUT = 5V
V OUT = 3.3V
470pF
R T
70
40.2k
PG
SYNC
GND
FB
316k
60
V IN = 12V
L = 5.6μH
100k
22μF
50
F = 800 kHz
0
0.5
1.0 1.5
2
LOAD CURRENT (A)
3685 TA01
3685 TA01b
3685fb
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3685IMSE#PBF | 功能描述:IC REG BUCK ADJ 2A 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: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 |
| LT3685IMSE#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 2.4MHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, 2.4MHZ, MSOP-10 |
| LT3685IMSE#TRPBF | 功能描述:IC REG BUCK ADJ 2A 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3685IMSEPBF | 制造商:Linear Technology 功能描述:36V 2A 2.4MHz Switch. Regulator MSOP10EP |
| LT3685IMSE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:36V, 2A, 2.4MHz Step-Down Switching Regulator |
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