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参数资料
| 型号： | LT3980EMSE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 16MSOP |
| 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 ~ 52.2 V |
| 输入电压： | 3.6 V ~ 58 V |
| PWM 型： | 电流模式，Burst Mode? |
| 频率 - 开关： | 225kHz ~ 2.25MHz |
| 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： | 16-TFSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-MSOP，裸露焊盘 |
LT3980
58V, 2A, 2.4MHz
Step-Down Switching Regulator
with 85μA Quiescent Current
Wide Input Range: Operation from 3.6V to 58V
Overvoltage Lockout Protects Circuits Through 80V
2A Maximum Output Current
Low Ripple (<15mV P-P ) Burst Mode ? Operation:
Adjustable Switching Frequency: 100kHz to 2.4MHz
Low Shutdown Current: I Q < 1μA
Catch Diode Current Sense Protects Circuit Through
Synchronizable Between 250kHz to 2MHz
Power Good Flag
Saturating Switch Design: 200mΩ On-Resistance
Thermal Protection
Soft-Start Capability
Small 16-Pin Thermally Enhanced MSOP and
Automotive Battery Regulation
Distributed Supply Regulation
Industrial Supplies
Wall Transformer Regulation
FEATURES
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Transients
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I Q = 85μA at 12V IN to 3.3V OUT
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Short-Circuit and Input Overvoltage
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3mm × 4mm DFN Packages
APPLICATIONS
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TYPICAL APPLICATION
5V Step-Down Converter
DESCRIPTION
The LT ? 3980 is an adjustable frequency (100kHz to
2.4MHz) monolithic buck switching regulator that accepts
input voltages up to 58V (80V transient). A high efficiency
200mΩ 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. Catch diode
current sense (DA pin) protects the circuit during input
voltage transients even when a high switching frequency
is used. Low ripple Burst Mode operation maintains high
efficiency at low output currents while keeping output
ripple below 15mV in a typical application. In addition, the
LT3980 can further enhance low output current efficiency
by drawing bias current from the output when V OUT is
above 3V. 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 flag signals when V OUT reaches 91% of
the programmed output voltage. The LT3980 is available
in 16-pin MSOP and 3mm × 4mm DFN packages with
exposed pads for low thermal resistance.
L , LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
Efficiency, V OUT = 5V
V IN
6.5V TO 58V
TRANSIENT
TO 80V
10μF
OFF ON
4.75k
1nF
V IN
RUN/SS
V C
RT
LT3980
BD
BOOST
SW
0.47μF 10μH
22pF
V OUT
5V
2A
95
90
85
80
75
70
65
V IN = 12V
V IN = 24V
V IN = 48V
97.6k
PG
SYNC
GND
DA
FB
536k
100k
47μF
60
55
50
0
f = 400kHz
D = DIODES, INC. SBR3U100LP
0.5 1
1.5
2
3980 TA01
For more information www.linear.com/LT3980
I LOAD (A)
3980 TA01b
3980fa
1
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| LT3980HMSE#PBF | 功能描述:IC REG BUCK ADJ 2A 16MSOP 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 |
| LT3980HMSE#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-16 |
| LT3980HMSE#TRPBF | 功能描述:IC REG BUCK ADJ 2A 16MSOP 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 |
| LT3980IDE#PBF | 功能描述:IC REG BUCK ADJ 2A 14DFN 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 |
| LT3980IDE#TRPBF | 功能描述:IC REG BUCK ADJ 2A 14DFN 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 |
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