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参数资料
| 型号： | LTM4603IV-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/26页 |
| 文件大小： | 0K |
| 描述： | IC DC/DC UMODULE 6A 118-LGA |
| 产品培训模块： | Power Module vs. Discrete DC to DC |
| 软件下载： | LTM4603-1 Spice Model |
| 产品目录绘图： | LTM Series_15x15x2.8 |
| 设计资源： | LTM4603IV-1#PBF Footprint.bxl |
| 特色产品： | μModule Products |
| 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）： | 6A |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 118-LGA |
| 尺寸/尺寸： | 0.59" L x 0.59" W x 0.11" H（15.0mm x 15.0mm x 2.8mm） |
| 包装： | 托盘 |
| 工作温度： | -40°C ~ 85°C |
| 效率： | 93% |
| 产品目录页面： | 2711 (CN2011-ZH PDF) |
LTM4603/LTM4603-1
APPLICATIONS INFORMATION
( )
t SOFTSTART = 0.8 ? 0.6V ± V OUT(MARGIN)
C SS
LTM4603
R SET
controltherampoftheinternalreferenceandtheoutput
voltage. The total soft-start time can be calculated as:
?
1.5μA
When the RUN pin falls below 1.5V, then the TRACK/SS
pin is reset to allow for proper soft-start control when the
regulator is enabled again. Current foldback and forced
continuous mode are disabled during the soft-start pro-
cess. The soft-start function can also be used to control
the output ramp up time, so that another regulator can
be easily tracked to it.
V IN
C IN
100k
V IN
PGOOD
MPGM
RUN
COMP
INTV CC
DRV CC
SGND
TRACK CONTROL
PLLIN TRACK/SS
V OUT
V FB
MARG0
MARG1
V OUT_LCL
DIFFV OUT
V OSNS+
V OSNS–
PGND f SET
40.2k
MASTER
OUTPUT
R T
60.4k
R B
40.2k
SLAVE OUTPUT
C OUT
TIME
? 60.4k = R T
R B =
– TRACK
+
OutputVoltageTracking
Output voltage tracking can be programmed externally
using the TRACK/SS pin. The output can be tracked up
and down with another regulator. Figure 5 shows an ex-
ample of coincident tracking where the master regulator’s
output is divided down with an external resistor divider
that is the same as the slave regulator’s feedback divider.
The master output must be greater than the slave output
for the tracking to work. Figure 6 shows the coincident
output tracking characteristics.
Ratiometric tracking can be achieved by a few simple
calculations and the slew rate value applied to the master’s
TRACK/SS pin. The TRACK/SS pin has a control range
from 0V to 0.6V. The master’s TRACK/SS pin slew rate
is directly equal to the master’s output slew rate in volts/
time. The equation:
MR
SR
where MR is the master’s output slew rate and SR is the
slave’s output slew rate in volts/time. When coincident
tracking is desired, then MR and SR are equal, thus R TB
is equal to 60.4k. R B is derived from equation:
0.6V
V FB V FB V
60.4k R FB (Slave) R TB
where V FB is the feedback voltage reference of the regula-
tor, and V TRACK is 0.6V.
14
4603 F05
Figure 5. Coincident Tracking Schematic
MASTER OUTPUT
SLAVE OUTPUT
OUTPUT
VOLTAGE
4603 F06
Figure 6. Coincident Output Tracking Characteristics
In ratiometric tracking, a different slew rate maybe desired
for the slave regulator. R T 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 T
= 75k. Solve for R B to equal 51.1k.
For applications that do not require tracking or sequencing,
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 V IN is below the undervoltage lockout threshold, then
TRACK/SS is pulled low.
4603fb
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTM4603IV-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:6A DC/DC μModule with PLL, Output Tracking and Margining |
| LTM4603V | 制造商:LINER 制造商全称:Linear Technology 功能描述:6A DC/DC μModule with PLL, Output Tracking and Margining |
| LTM4603V-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:6A DC/DC μModule with PLL, Output Tracking and Margining |
| LTM4604 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Voltage, 4A DC/DC μModuleTM with Tracking |
| LTM4604A | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Voltage, 4A DC/DC μModule with Tracking |
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