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| 型号： | LT3471EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/16页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG ADJ DL 10DFN |
| 标准包装： | 121 |
| 类型： | 升压（升压），反相，回扫，Sepic |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 1 V ~ 40 V |
| 输入电压： | 2.4 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.2MHz |
| 电流 - 输出： | 1.3A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 10-DFN（3x3） |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
LT3471
TYPICAL PERFORMANCE CHARACTERISTICS
Oscillator Frequency
vs Temperature
Peak Switch Current
vs SHDN /SS Voltage
Start-Up Waveform
(Figure 2 Circuit)
1.50
1.45
1.40
1.35
1.30
1.25
1.20
1.15
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
T A = 25°C
I SUPPLY
1A/DIV
V OUT1
2V/DIV
V OUT2
5V/DIV
CONTROL 1
AND 2
5V/DIV
1.10
1.05
0.4
0.2
0.5ms/DIV
3471 G09
1.00
–50
–25
0
25
50
75
100
125
0
0
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6 1.8 2.0
TEMPERATURE (°C)
3471 G07
PIN FUNCTIONS
FB1N (Pin 1): Negative Feedback Pin for Switcher 1.
Connect resistive divider tap here. Minimize trace area at
FB1N. Set V OUT = V FB1P (1 + R1/R2), or connect to ground
for inverting topologies.
FB1P (Pin 2): Positive Feedback Pin for Switcher 1. Connect
either to V REF or a divided down version of V REF , or connect
to a resistive divider tap for inverting topologies.
V REF (Pin 3): 1.00V Reference Pin. Can supply up to
1mA of current. Do not pull this pin high. Must be locally
bypassed with no less than 0.01μF and no more than 1μF.
A 0.1μF ceramic capacitor is recommended. Use this pin
as the positive feedback reference or connect a resistor
divider here for a smaller reference voltage.
FB2P (Pin 4): Same as FB1P but for Switcher 2.
FB2N (Pin 5): Same as FB1N but for Switcher 2.
V SHDN /SS (V)
3471 G08
and minimize the metal trace area connected to this pin
to minimize EMI.
SHDN /SS2 (Pin 7): Shutdown and Soft-Start Pin. Tie to
1.8V or more to enable device. Ground to shut down. Soft-
start function is provided when the voltage at this pin is
ramped slowly to 1.8V with an external RC circuit.
V IN (Pin 8): Input Supply. Must be locally bypassed.
SHDN /SS1 (Pin 9): Same as SHDN /SS2 but for Switcher 1.
Note: taking either SHDN /SS pin high will enable the part.
Each switcher is individually enabled with its respective
SHDN /SS pin.
SW1 (Pin 10): Same as SW2 but for Switcher 1.
Exposed Pad (Pin 11): Ground. Connect directly to local
ground plane. This ground plane also serves as a heat
sink for optimal thermal performance.
SW2 (Pin 6): Switch Pin for Switcher 2 (Collector of in-
ternal NPN power switch). Connect inductor/diode here
3471fb
4
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| LT3472EDD#PBF | 功能描述:IC REG BOOST INV ADJ 50MA 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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| LT3472EDD#TR | 功能描述:IC REG BOOST INV ADJ 50MA 10DFN RoHS:否 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:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
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