- 您现在的位置：买卖IC网 > PDF目录19750 > LTM4627IY#PBF (Linear Technology)IC DC/DC UMODULE 15A 133-BGA PDF资料下载
参数资料
| 型号： | LTM4627IY#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/32页 |
| 文件大小： | 0K |
| 描述： | IC DC/DC UMODULE 15A 133-BGA |
| 产品目录绘图： | LTM Series_15x15x4.3 |
| 标准包装： | 119 |
| 系列： | µModule® |
| 类型： | 非隔离（POL） |
| 输出数： | 1 |
| 电压 - 输入（最小）： | 4.5V |
| 电压 - 输入（最大）： | 20V |
| Voltage - Output 1： | 0.6 ~ 5 V |
| 电流 - 输出（最大）： | 15A |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 133-BGA |
| 尺寸/尺寸： | 0.59" L x 0.59" W x 0.19" H（15.0mm x 15.0mm x 4.9mm） |
| 包装： | 托盘 |
| 工作温度： | -40°C ~ 125°C |
| 效率： | 93% |
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页当前第11页第12页第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页第31页第32页
LTM4627
APPLICATIONS INFORMATION
V OUT = 0.6V ?
R FB =
V OUT
0.6V
V OUT
I CIN(RMS) =
I OUT(MAX)
ThetypicalLTM4627applicationcircuitisshowninFig-
ure 18. External component selection is primarily deter-
mined by the maximum load current and output voltage.
Refer to Table 4 for specific external capacitor requirements
for particular applications.
V IN to V OUT Step-Down Ratios
There are restrictions in the V IN to V OUT step-down ratio
that can be achieved for a given input voltage. The V IN to
V OUT minimum dropout is a function of load current and
at very low input voltage and high duty cycle applications
output power may be limited as the internal top power
MOSFET is not rated for 15A operation at higher ambient
temperatures. At very low duty cycles the minimum 90ns
on-time must be maintained. See the Frequency Adjust-
ment section and temperature derating curves.
Output Voltage Programming
The PWM controller has an internal 0.6V ±1% reference
voltage. As shown in the Block Diagram, a 60.4k internal
feedback resistor connects the V OUT_LCL and V FB pins
together. When the remote sense amplifier is used, then
DIFF_OUT is connected to the V OUT_LCL pin. If the remote
sense amplifier is not used, then V OUT_LCL connects to
V OUT . The output voltage will default to 0.6V with no feed-
back resistor. Adding a resistor R FB from V FB to ground
programs the output voltage:
60.4k + R FB
R FB
Table 1. V FB Resistor Table vs V arious Output Voltages
V OUT (V) 0.6 1.0 1.2 1.5 1.8 2.5 3.3 5.0
For parallel operation of N LTM4627s, the following equa-
tion can be used to solve for R FB :
60.4k /N
–1
Tie the V FB pins together for each parallel output. The
COMP pins must be tied together also.
Input Capacitors
The LTM4627 module should be connected to a low AC-
impedance DC source. Additional input capacitors are
needed for the RMS input ripple current rating. The I CIN(RMS)
equation which follows can be used to calculate the input
capacitor requirement. Typically 22μF X7R ceramics are a
good choice with RMS ripple current ratings of ~ 2A each.
A 47μF to 100μF surface mount aluminum electrolytic bulk
capacitor can be used for more input bulk capacitance.
This bulk input capacitor is only needed if the input source
impedance is compromised by long inductive leads, traces
or not enough source capacitance. If low impedance power
planes are used, then this bulk capacitor is not needed.
For a buck converter, the switching duty cycle can be
estimated as:
D =
V IN
Without considering the inductor ripple current, for each
output, the RMS current of the input capacitor can be
estimated as:
? D ? (1– D)
η %
V OUT
0.6V
R FB (k) Open 90.9 60.4 40.2 30.1 19.1
For a given V OUT , R FB can be determined by:
60.4k
R FB =
–1
13.3
8.25
In the previous equation, η % is the estimated efficiency of
the power module. The bulk capacitor can be a switcher-
rated electrolytic aluminum capacitor or a Polymer capacitor.
4627fc
For more information www.linear.com/LTM4627
11
相关PDF资料 |
PDF描述 |
|---|---|
| MIC29201-3.3BU | IC REG LDO 3.3V .4A TO-263-5 |
| VI-2T4-CY-F4 | CONVERTER MOD DC/DC 48V 50W |
| VE-B7Z-CW-B1 | CONVERTER MOD DC/DC 2V 40W |
| EEC08DREH | CONN EDGECARD 16POS .100 EYELET |
| MIC29201-3.3BT | IC REG LDO 3.3V .4A TO-220-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTM4627MPY#PBF | 功能描述:IC DC/DC UMODULE 15A 133-BGA 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:* |
| LTM4627MPY#PBF | 制造商:Linear Technology 功能描述:BUCK REGULATOR DC/DC MODULE 15A BGA-1 |
| LTM4628 | 制造商:LINER 制造商全称:Linear Technology 功能描述:12A 28VIN DC/DC μModule Regulator |
| LTM4628EV#PBF | 功能描述:IC DC/DC UMODULE 16A 144-LGA 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:* |
| LTM4628EVPBF | 制造商:Linear Technology 功能描述:DC/DC Regulator Dual 8A or Single 16A |
发布紧急采购，3分钟左右您将得到回复。