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参数资料
| 型号： | LTC3601EMSE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 1.5A 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： | 0.5 V ~ 14.52 V |
| 输入电压： | 4 V ~ 15 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 800kHz ~ 4MHz |
| 电流 - 输出： | 1.5A |
| 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： | 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 |
LTC3601
APPLICATIONS INFORMATION
V OUT = 0.6V 1 +
usetypesthathavebeensurgetestedforuseinswitching
power supplies. Aluminum electrolytic capacitors have
signi?cantly higher ESR but can be used in cost-sensitive
applications provided that consideration is given to ripple
current ratings and long-term reliability. Ceramic capacitors
have excellent low ESR characteristics and small footprints.
Their relatively low value of bulk capacitance may require
multiple capacitors in parallel.
Using Ceramic Input and Output Capacitors
Higher value, lower cost ceramic capacitors are now
available in small case sizes. Their high voltage rating
and low ESR make them ideal for switching regulator
applications. However, due to the self-resonant and high-Q
characteristics of some types of ceramic capacitors, care
must be taken when these capacitors are used at the input
and output. When a ceramic capacitor is used at the input,
and the power is supplied by a wall adapter through long
wires, a load step at the output can induce ringing at the
V IN input. At best, this ringing can couple to the output and
be mistaken as loop instability. At worst, a sudden inrush
of current through the long wires can potentially cause a
voltage spike at V IN large enough to damage the part. For
a more detailed discussion, refer to Application Note 88.
When choosing the input and output ceramic capacitors
choose the X5R or X7R dielectric formulations. These
dielectrics provide the best temperature and voltage
characteristics for a given value and size.
INTV CC Regulator Bypass Capacitor
An internal low dropout (LDO) regulator produces a
3.3V supply voltage used to power much of the internal
LTC3601 circuitry including the power MOSFET gate
drivers. The INTV CC pin connects to the output of this
regulator and must have a minimum of 1μF of decoupling
results. Furthermore, this supply is intended only to supply
additional DC load currents as desired and not intended
to regulate large transient or AC behavior this may impact
LTC3601 operation.
Boost Capacitor
The boost capacitor, C BOOST , is used to create a voltage rail
above the applied input voltage V IN . Speci?cally, the boost
capacitor is charged to a voltage equal to approximately
INTV CC each time the bottom power MOSFET is turned
on. The charge on this capacitor is then used to supply
the required transient current during the remainder of the
switching cycle. When the top MOSFET is turned on, the
BOOST pin voltage will be equal to approximately V IN +
3.3V. For most applications a 0.1μF ceramic capacitor will
provide adequate performance.
Output Voltage Programming
The LTC3601 will adjust the output voltage such that V FB
equals the reference voltage of 0.6V according to:
R1
R2
The desired output voltage is set by appropriate selection of
resistors R1 and R2 as shown in Figure 2. Choosing large
values for R1 and R2 will result in improved ef?ciency but
may lead to undesirable noise coupling or phase margin
reduction due to stray capacitances at the FB node. Care
should be taken to route the FB line away from any noise
source, such as the SW line.
To improve the frequency response of the main control
loop a feedforward capacitor, C F , may be used as shown
in Figure 2.
V OUT
capacitance to ground. The decoupling capacitor should
have low impedance electrical connections to the INTV CC
FB
R1
C F
and PGND pins to provide the transient currents required
LTC3601
R2
by the LTC3601. The user may connect a maximum load
current of 5mA to this pin but must take into account the
increased power dissipation and die temperature that
SGND
3601 F02
Figure 2. Optional Feedforward Capacitor
3601fb
12
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| LTC3601EUD#PBF | 功能描述:IC REG BUCK SYNC ADJ 1.5A 16QFN 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 |
| LTC3601EUD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 1.5A 16QFN 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: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 |
| LTC3601EUDPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 4-15V QFN16EP |
| LTC3601IMSE#PBF | 功能描述:IC REG BUCK SYNC ADJ 1.5A 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: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 |
| LTC3601IMSE#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 1.5A 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: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 |
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