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参数资料
| 型号： | LT3695EMSE-5#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 19/30页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 5V 1A 16MSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 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： | 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 |
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LT3695 Series
APPLICATIONS INFORMATION
BD
V OUT
the output is already in regulation, then the boost capacitor
may not be fully charged. Because the boost capacitor is
V IN
V IN
BOOST
LT3695 SW
C3
charged with the energy stored in the inductor, the circuit
will rely on some minimum load current to get the boost
D1
circuit running properly. This minimum load will depend
GND
DA
PGND
on input and output voltages, and on the arrangement of
the boost circuit. The minimum load generally goes to
3695 F04a
(4a) For V OUT > 2.8V, V IN(MIN) = 4.3V if V OUT < 3V
V OUT
zero once the circuit has started. Figure 5 shows a plot
of minimum load to start and to run as a function of input
voltage. In many cases the discharged output capacitor
will present a load to the switcher, which will allow it to
BD
D2
start. The plots show the worst-case situation where V IN is
V IN
V IN
BOOST
LT3695 SW
C3
ramping very slowly. For lower start-up voltage, the boost
diode can be tied to V IN ; however, this restricts the input
D1
range to one-half of the absolute maximum rating of the
GND
DA
PGND
3695 F04b
BOOST pin. At light loads, the inductor current becomes
discontinuous and the effective duty cycle can be very high.
6.0
(4b) For 2.5V < V OUT < 2.8V, V IN(MIN) = 4.3V
BD
5.5
5.0
4.5
TO START
(WORST CASE)
V IN
V IN
BOOST
LT3695 SW
C3
V OUT
4.0
D1
3.5
TO RUN
GND
DA
PGND
3.0
2.5
V OUT = 3.3V
T A = 25?C
L = 10μH
3695 F04c
2.0
1
10 100
f = 800kHz
1000
(4c) For V OUT < 2.5V, V IN(MAX) = 25V
Figure 4. Three Circuits for Generating
the Boost Voltage for the LT3695
8.0
7.5
LOAD CURRENT (mA)
7.0
6.5
TO START
(WORST CASE)
the circuit in Figure 4a. For higher output voltages, make
sure that there is no more than 8V at the BD pin either by
connecting it to another available supply higher than 3V or
by using a Zener diode between V OUT and BD to maintain
6.0
5.5
5.0 TO RUN
4.5
4.0
the BD pin voltage between 3V and 8V.
3.5
3.0
V OUT = 5V
T A = 25?C
The minimum operating voltage of the LT3695 regulators
application is limited by the minimum input voltage and by
the maximum duty cycle as outlined previously. For proper
2.5
2.0
1
10 100
LOAD CURRENT(mA)
L = 10μH
f = 800kHz
1000
3695 F05
start-up, the minimum input voltage is also limited by the
boost circuit. If the input voltage is ramped slowly, or the
LT3695 regulators are turned on with their RUN/SS pin when
Figure 5. The Minimum Input Voltage Depends on
Output Voltage, Load Current and Boost Circuit
3695fa
19
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| LT3695HMSE#PBF | 功能描述:IC REG BUCK ADJ 1A 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 |
| LT3695HMSE#TRPBF | 功能描述:IC REG BUCK ADJ 1A 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 |
| LT3695HMSE-3.3#PBF | 功能描述:IC REG BUCK 3.3V 1A 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 |
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