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| 型号： | LTM8023IY#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/24页 |
| 文件大小： | 0K |
| 描述： | IC DC/DC UMODULE 2A 50LGA |
| 产品目录绘图： | LTM8022-8023 |
| 标准包装： | 168 |
| 系列： | µModule® |
| 类型： | 非隔离（POL） |
| 输出数： | 1 |
| 电压 - 输入（最小）： | 3.6V |
| 电压 - 输入（最大）： | 36V |
| Voltage - Output 1： | 0.8 ~ 10 V |
| 电流 - 输出（最大）： | 2A |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 50-BGA |
| 尺寸/尺寸： | 0.44" L x 0.35" W x 0.13" H（11.3mm x 9.0mm x 3.4mm） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
LTM8023
APPLICATIONS INFORMATION
V RUN/SS
GND
Soft-Start
The RUN/SS pin can be used to soft-start the LTM8023,
reducing the maximum input current during start-up.
The RUN/SS pin is driven through an external RC filter
to create a voltage ramp at this pin. Figure 3 shows the
start-up and shutdown waveforms with the soft-start
circuit. By choosing an appropriate RC time constant,
the peak start-up current can be reduced to the current
that is required to regulate the output, with no overshoot.
Choose the value of the resistor so that it can supply at
least 20μA when the RUN/SS pin reaches 2.5V.
I L
RUN 1A/DIV
15k
RUN/SS
2V/DIV
0.22μF
Shorted Input Protection
Care needs to be taken in systems where the output will be
held high when the input to the LTM8023 is absent. This
may occur in battery charging applications or in battery
backup systems where a battery or some other supply is
diode OR-ed with the LTM8023’s output. If the V IN pin is
allowed to float and the RUN/SS pin is held high (either
by a logic signal or because it is tied to V IN ), then the
LTM8023’s internal circuitry will pull its quiescent cur-
rent through its internal power switch. This is fine if your
system can tolerate a few milliamps in this state. If you
ground the RUN/SS pin, the internal power switch cur-
rent will drop to essentially zero. However, if the V IN pin
is grounded while the output is held high, then parasitic
diodes inside the LTM8023 can pull large currents from
the output through the V IN pin. Figure 4 shows a circuit
that will run only when the input voltage is present and
that protects against a shorted or reversed input.
V OUT
2V/DIV
V IN
V IN
V OUT
V OUT
RUN/SS
AUX
2ms/DIV
Figure 3. To Soft-Start the LTM8023, Add a
Resistor and Capacitor to the RUN/SS Pin
8023 F03
LTM8023
R T SYNC GND
BIAS
ADJ
8023 F04
Synchronization
The internal oscillator of the LTM8023 can be synchronized
by applying an external 250kHz to 2MHz clock to the SYNC
pin. Do not leave this pin floating. The resistor tied from the
R T pin to ground should be chosen such that the LTM8023
oscillates 20% lower than the intended synchronization
frequency (see the Frequency Selection section).
Figure 4. The Input Diode Prevents a Shorted Input from
Discharging a Backup Battery Tied to the Output. It Also Protects
the Circuit from a Reversed Input. The LTM8023 Runs Only When
the Input is Present.
The LTM8023 will not enter Burst Mode operation while
synchronized to an external clock, but will instead skip
pulses to maintain regulation.
8023fi
For more information www.linear.com/LTM8023
13
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相关代理商/技术参数 |
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| LTM8023MPV | 制造商:LINER 制造商全称:Linear Technology 功能描述:2A, 36V DC/DC μModule |
| LTM8023MPV#PBF | 功能描述:IC BUCK SYNC ADJ 2A 50LGA 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）:100V 电压 - 输入（最大）:200V Voltage - Output 1:7.5V 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:* |
| LTM8023MPV#PBF | 制造商:Linear Technology 功能描述:DC/DC MICRO MODULE IC 制造商:Linear Technology 功能描述:IC, STEP-DOWN DC/DC POWER SUPPLY, LGA-50 |
| LTM8023MPV-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:2A, 36V DC/DC μModule |
| LTM8023MPY#PBF | 功能描述:IC DC/DC UMODULE 2A 50BGA 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:* |
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