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参数资料
| 型号： | LTM4627IY#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 16/32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% |
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LTM4627
APPLICATIONS INFORMATION
SLAVE OUTPUT
TIME
topfeedbackresistoroftheslaveregulatorinequalslew
rate or coincident tracking, then R TA is equal to R FB with
V FB = V TRACK . Therefore R TB = 60.4k, and R TA = 60.4k in
Figure 4.
In ratiometric tracking, a different slew rate maybe desired
for the slave regulator. R TB can be solved for when SR is
slower than MR. Make sure that the slave supply slew
rate is chosen to be fast enough so that the slave output
voltage will reach its final value before the master output.
For example, MR = 1.5V/ms, and SR = 1.2V/ms. Then R TB
= 75k. Solve for R TA to equal 51.1k.
For applications that do not require tracking or sequenc-
ing, simply tie the TRACK/SS pin to INTV CC to let RUN
control the turn on/off. When the RUN pin is below its
threshold or the V IN undervoltage lockout, then TRACK/
SS is pulled low.
MASTER OUTPUT
OUTPUT
VOLTAGE
4627 F05
Figure 5. Output Voltage Coincident Tracking
Overcurrent and Overvoltage Protection
The LTM4627 has overcurrent protection (OCP) in a
short circuit. The internal current comparator threshold
folds back during a short to reduce the output current.
An overvoltage condition (OVP) above 10% of the regu-
lated output voltage will force the top MOSFET off and
the bottom MOSFET on until the condition is cleared.
An input electronic circuit breaker or fuse can be sized to
be tripped or cleared when the bottom MOSFET is turned
on to protect against the overvoltage. Foldback current
limiting is disabled during soft-start or tracking start-up.
Run Enable
The RUN pin is used to enable the power module or
sequence the power module. The threshold is 1.25V, and
the pin has an internal 5.1V Zener to protect the pin. The
RUN pin can be used as an undervoltage lockout (UVLO)
function by connecting a resistor divider from the input
supply to the RUN pin:
V UVLO = ((R1+R2)/R2) ? 1.25V.
See the Block Diagram for the example of use.
INTV CC Regulator
The LTM4627 has an internal low dropout regulator from
V IN called INTV CC . This regulator output has a 4.7μF
ceramic capacitor internal. This regulator powers the
internal controller and MOSFET drivers. The gate driver
current is ~20mA for 750kHz operation. The regulator loss
can be calculated as:
(V IN – 5V) ? 20mA = P LOSS
EXTV CC external voltage source ≥ 4.7V can be applied to
this pin to eliminate the internal INTV CC LDO power loss and
increase regulator efficiency. A 5V supply can be applied
to run the internal circuitry and power MOSFET driver. If
unused, leave pin floating. EXTV CC must be less than V IN
at all times during power-on and power-off sequences.
Stability Compensation
The LTM4627 has already been internally compensated for
all output voltages. Table 4 is provided for most application
requirements. LTpowerCAD is available for other control
loop optimization.
4627fc
16
For more information www.linear.com/LTM4627
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相关代理商/技术参数 |
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| 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 |
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