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| 型号： | LTM4609IV#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/28页 |
| 文件大小： | 0K |
| 描述： | IC BUCK/BOOST SYNC ADJ 4A 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： | LTM4609 Spice Model |
| 设计资源： | DC1477A Design Files LTM4609IV#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 ~ 34 V |
| 电流 - 输出（最大）： | 4A |
| 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% |
| 配用： | DC1477A-ND - BOARD EVAL LTM4609 |
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LTM4609
APPLICATIONS INFORMATION
I OUT(MAX,BUCK) =
130mV ?I L
V_UVLO=
? 1.6V
R SENSE(MAX,BUCK) =
t SOFTSTART =
In buck mode, the allowed maximum average load cur-
rent is:
+
R SENSE 2
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 + ?I L ? V IN
The maximum current sensing R SENSE value for the buck
mode is:
2 ? 130mV
2 ? I OUT(MAX,BUCK) – ?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:
2.4V ? C SS
1.7μA
When the RUN pin falls below 1.6V, then the 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 process.
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:
R1+R2
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
LTM4609 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 LTM4609 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
4609ff
12
For more information www.linear.com/LTM4609
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相关代理商/技术参数 |
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| LTM4609IY#PBF | 制造商:Linear Technology 功能描述:DC/DC CONVERT 0.8-36V 10A 制造商:Linear Technology 功能描述:BUCK / BOOST 4/10A 0.8-34V |
| LTM4609MPV#PBF | 功能描述:IC UMODULE BUCK-BOOST 141-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:* |
| LTM4609MPY#PBF | 制造商:Linear Technology 功能描述:DC/DC CONVERT 0.8-36V 10A 制造商:Linear Technology 功能描述:DP-uModule, 36Vin, 34Vout High Efficiency Buck-Boost DC/DC uModules |
| LTM4611 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultralow VIN, 15A DC/DC μModule Regulator |
| LTM4611EV#PBF | 功能描述:IC UMODULE DC/DC LV 15A 133-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）:21V 电压 - 输入（最大）:32V Voltage - Output 1:5V 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-SlimMod 尺寸/尺寸:4.60" L x 1.80" W x 0.52" H（116.8mm x 45.7mm x 13.2mm） 包装:散装 工作温度:-25°C ~ 85°C 效率:* 电源（瓦特）- 最大:* |
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