- 您现在的位置：买卖IC网 > PDF目录19840 > LTM8052AIV#PBF (Linear Technology)IC UMODULE 36VIN 5A CVCC 81LGA PDF资料下载
参数资料
| 型号： | LTM8052AIV#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/30页 |
| 文件大小： | 0K |
| 描述： | IC UMODULE 36VIN 5A CVCC 81LGA |
| 产品培训模块： | LTM8026 and LTM8052 Step-Down uModule Regulators |
| 标准包装： | 119 |
| 系列： | * |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页
LTM8052/LTM8052A
OPERATION
which the capacitor at the soft-start pin is charged with
an 11μA current source.
The LTM8052/LTM8052A is equipped with a thermal shut-
down to protect the device during momentary overload
conditions. It is set above the 125°C absolute maximum
internal temperature rating to avoid interfering with
normal specified operation, so internal device tempera-
tures will exceed the absolute maximum rating when the
APPLICATIONS INFORMATION
For most applications, the design process is straight
forward, summarized as follows:
1. Look at Table 1 and find the row that has the desired
input range and output voltage.
2. Apply the recommended C IN , C OUT , R ADJ and R T
values.
While these component combinations have been tested for
proper operation, it is incumbent upon the user to verify
proper operation over the intended system’s line, load and
environmental conditions. Bear in mind that the maximum
output current is limited by junction temperature, the
relationship between the input and output voltage mag-
nitude and polarity and other factors. Please refer to the
graphs in the Typical Performance Characteristics section
for guidance.
The maximum frequency (and attendant R T value) at which
the LTM8052/LTM8052A should be allowed to switch is
given in Table 1 in the f MAX column, while the recommended
frequency (and R T value) for optimal efficiency over the
given input condition is given in the f OPTIMAL column.
There are additional conditions that must be satisfied if
the synchronization function is used. Please refer to the
Synchronization section for details.
Capacitor Selection Considerations
The C IN and C OUT capacitor values in Table 1 are the
minimum recommended values for the associated oper-
ating conditions. Applying capacitor values below those
indicated in Table 1 is not recommended, and may result
overtemperature protection is active. So, continuous or
repeated activation of the thermal shutdown may impair
device reliability. During thermal shutdown, all switching
is terminated and the SS pin is driven low.
The switching frequency is determined by a resistor at the
RT pin. The LTM8052/LTM8052A may also be synchronized
to an external clock through the use of the SYNC pin.
in undesirable operation. Using larger values is generally
acceptable, and can yield improved dynamic response, if
necessary. Again, it is incumbent upon the user to verify
proper operation over the intended system’s line, load and
environmental conditions.
Ceramic capacitors are small, robust and have very low ESR.
However, not all ceramic capacitors are suitable. X5R and
X7R types are stable over temperature, applied voltage and
give dependable service. Other types, including Y5V and
Z5U have very large temperature and voltage coefficients
of capacitance. In an application circuit they may have only
a small fraction of their nominal capacitance resulting in
much higher output voltage ripple than expected.
Many of the output capacitances given in Table 1 specify
an electrolytic capacitor. Ceramic capacitors may also be
used in the application, but it may be necessary to use
more of them. Many high value ceramic capacitors have a
large voltage coefficient, so the actual capacitance of the
component at the desired operating voltage may be only
a fraction of the specified value. Also, the very low ESR of
ceramic capacitors may necessitate additional capacitors
for acceptable stability margin.
A final precaution regarding ceramic capacitors concerns
the maximum input voltage rating of the LTM8052/
LTM8052A. A ceramic input capacitor combined with trace
or cable inductance forms a high Q (under damped) tank
circuit. If the LTM8052/LTM8052A circuit is plugged into a
live supply, the input voltage can ring to twice its nominal
value, possibly exceeding the device’s rating. This situa-
tion is easily avoided; see the Hot Plugging Safely section.
13
For more information www.linear.com/LTM8052
8052fc
相关PDF资料 |
PDF描述 |
|---|---|
| TRME336M035R0050 | CAP TANT 33UF 35V 20% 2917 |
| VE-JWM-CW-B1 | CONVERTER MOD DC/DC 10V 100W |
| TLE4270D | IC REG LDO 5V .55A DPAK-5 |
| LTC4221CGN#PBF | IC CTLR HOT SWAP DUAL 16SSOP |
| 7-1734857-5 | PCI EXP STRADDLE 98P BLK 30U" |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTM8052EV#PBF | 功能描述:IC DC/DC UMODULE BUCK 5A 81LGA RoHS:是 类别:电源 - 板载 >> DC DC Converters 系列:µModule® 设计资源:VI-200, VI-J00 Design Guide, Appl Manual 标准包装:1 系列:* 类型:隔离 输出数:1 电压 - 输入（最小）:66V 电压 - 输入（最大）:160V Voltage - Output 1:12V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:* 电源（瓦） - 制造商系列:50W 电压 - 隔离:* 特点:* 安装类型:通孔 封装/外壳:9-FinMod 尺寸/尺寸:4.60" L x 1.86" W x 0.79" H（116.8mm x 47.2mm x 20.1mm） 包装:散装 工作温度:-25°C ~ 85°C 效率:* 电源（瓦特）- 最大:* |
| LTM8052IV#PBF | 功能描述:IC UMODULE CVCC STEP DOWN 81LGA RoHS:是 类别:电源 - 板载 >> DC DC Converters 系列:µModule® 设计资源:VI-200, VI-J00 Design Guide, Appl Manual 标准包装:1 系列:* 类型:隔离 输出数:1 电压 - 输入（最小）:55V 电压 - 输入（最大）:100V Voltage - Output 1:5.8V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:* 电源（瓦） - 制造商系列:100W 电压 - 隔离:* 特点:* 安装类型:通孔 封装/外壳:9 针半砖 BusMod 尺寸/尺寸:2.36" L x 2.28" W x 1.08" H（59.9mm x 57.9mm x 27.4mm） 包装:散装 工作温度:-25°C ~ 100°C 效率:* 电源（瓦特）- 最大:* |
| LTM8061 | 制造商:LINER 制造商全称:Linear Technology 功能描述:32V, 2A μModule Li-Ion/ Polymer Battery Charger |
| LTM8061EV-4.1#PBF | 功能描述:IC BATTERY CHARGER 4.1V 77-LGA RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:µModule® 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
| LTM8061EV-4.1PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:32V, 2A μModule Li-Ion/ Polymer Battery Charger |
发布紧急采购，3分钟左右您将得到回复。