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参数资料
| 型号： | LTM4607IV#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/26页 |
| 文件大小： | 0K |
| 描述： | IC BUCK/BOOST SYNC ADJ 5A 141LGA |
| 产品培训模块： | Buck-Boost uModule Regulators High Voltage µModule DC/DC Regulators Power Module vs. Discrete DC to DC |
| 软件下载： | LTM460(5,7) Spice Models LTM4607 Spice Model |
| 产品目录绘图： | LTM Series_15x15x2.8 |
| 设计资源： | LTM4607IV#PBF Footprint.bxl |
| 特色产品： | μModule Products DC/DC μModule Regulator Family |
| 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）： | 36V |
| Voltage - Output 1： | 0.8 ~ 24 V |
| 电流 - 输出（最大）： | 5A |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 141-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： | 98% |
| 产品目录页面： | 2711 (CN2011-ZH PDF) |
| 配用： | DC1198A-B-ND - BOARD DEMO LTM4607 |
LTM4607
APPLICATIONS INFORMATION
I OUT(MAX,BUCK) =
130mV Δ I L
R SENSE
2
V _UVLO =
R1 + R2
R SENSE(MAX,BUCK) =
2.4V ? C SS
t SOFTSTART =
In buck mode, the allowed maximum average load cur-
rent is:
+
The maximum current sensing R SENSE value for the boost
mode is:
R SENSE(MAX,BOOST) =
2 ? 160mV ? V IN
2 ? I OUT(MAX,BOOST) ? V OUT + Δ I L ? V IN
The maximum current sensing R SENSE value for the buck
mode is:
2 ? 130mV
2 ? I OUT(MAX,BUCK) – Δ I L
A 20% to 30% margin on the calculated sensing resistor
is usually recommended. Please refer to Table 3 for the
recommended sensing resistors for different applications.
Soft-Start
The SS pin provides a means to soft-start the regulator.
A capacitor on this pin will program the ramp rate of the
output voltage. A 1.7μA current source will charge up the
external soft-start capacitor. This will control the ramp
of the internal reference and the output voltage. The total
soft-start time can be calculated as:
1.7μA
When the RUN pin falls below 1.6V, then soft-start pin
is reset to allow for proper soft-start control when the
regulator is enabled again. Current foldback and force
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. Do not apply more than 6V to the SS pin.
Run Enable
The RUN pin is used to enable the power module. The pin
can be driven with a logic input, not to exceed 6V.
The RUN pin can also be used as an undervoltage lockout
(UVLO) function by connecting a resistor from the input
supply to the RUN pin. The equation:
? 1.6V
R2
Power Good
The PGOOD pin is an open drain pin that can be used to
monitor valid output voltage regulation. This pin monitors
a ±7.5% window around the regulation point.
COMP Pin
This pin is the external compensation pin. The module
has already been internally compensated for most output
voltages. A spice model is available for other control loop
optimization.
Fault Conditions: Current Limit and Overcurrent
Foldback
LTM4607 has a current mode controller, which inherently
limits the cycle-by-cycle inductor current not only in steady
state operation, but also in transient. Refer to Table 3.
To further limit current in the event of an overload condi-
tion, the LTM4607 provides foldback current limiting. If the
output voltage falls by more than 70%, then the maximum
output current is progressively lowered to about 30% of
its full current limit value for boost mode and about 40%
for buck mode.
Standby Mode (STBYMD)
The standby mode (STBYMD) pin provides several choices
for start-up and standby operational modes. If the pin is
pulled to ground, the SS pin is internally pulled to ground,
preventing start-up and thereby providing a single control
12
For more information www.linear.com/LTM4607
4607fc
相关PDF资料 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTM4607V | 制造商:LINER 制造商全称:Linear Technology 功能描述:36VIN, 24VOUT High Effi ciency Buck-Boost DC/DC μModule |
| LTM4608 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low VIN, 8A DC/DC μModuleTM with Tracking, Margining, and Frequency Synchronization |
| LTM4608_1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low VIN, 8A DC/DC Module Regulator with Tracking, Margining, and Frequency Synchronization |
| LTM4608A | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low VIN, 8A DC/DC μModule with Tracking, Margining, and Frequency Synchronization |
| LTM4608A_1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low VIN, 8A DC/DC Module Regulator with Tracking, Margining, and Frequency Synchronization |
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