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参数资料
| 型号： | DC1623A |
| 厂商： | Linear Technology |
| 文件页数： | 15/26页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL LTM8003 |
| 软件下载： | LTM8033 Spice Model |
| 设计资源： | DC1623A Design Files |
| 标准包装： | 1 |
| 系列： | µModule® |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 3.3V |
| 电流 - 输出： | 3A |
| 输入电压： | 5.5 ~ 36 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 425kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | LTM8033 |
LTM8033
APPLICATIONS INFORMATION
Synchronization
The internal oscillator of the LTM8033 can be synchro-
nized by applying an external 250kHz to 2MHz clock to
the SYNC pin. Do not leave this pin floating. Ground the
SYNC pin if the synchronization function is not used.
When synchronizing the LTM8033, select an R T resistor
value that corresponds to an operating frequency 20%
lower than the intended synchronization frequency (see
the Frequency Selection section).
In addition to synchronization, the SYNC pin controls Burst
Mode behavior. If the SYNC pin is driven by an external
clock, or pulled up above 0.7V, the LTM8033 will not en-
ter Burst Mode operation, but will instead skip pulses to
maintain regulation instead.
Shorted Input Protection
Care needs to be taken in systems where the output will be
held high when the input to the LTM8033 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 LTM8033’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
LTM8033’s internal circuitry will pull its quiescent current
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 SW pin current will drop to essentially
zero. However, if the V IN pin is grounded while the output
is held high, then parasitic diodes inside the LTM8033 can
pull large currents from the output through the V IN pin.
Figure 3 shows a circuit that will run only when the input
voltage is present and that protects against a shorted or
reversed input.
V IN
V IN
LTM8033
V OUT
V OUT
RUN/SS
SHARE
AUX
BIAS
ADJ
RT SYNC GND
8033 F03
Figure 3. 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 LTM8033 Runs Only When the Input is Present
8033fa
For more information www.linear.com/LTM8033
15
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相关代理商/技术参数 |
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| DC1625A-A | 功能描述:BOARD DEMO FOR LTC4227-1 RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
| DC1625A-B | 功能描述:BOARD DEMO FOR LTC4227-2 RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
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| DC1627A-A | 制造商:Linear Technology 功能描述:EVAL BOARD FOR LTC4226-1 制造商:Linear Technology 功能描述:DEMO BOARD, LTC4226 HOT SWAP CONTROLLER, Silicon Manufacturer:Linear Technology, Silicon Core Number:LTC4226CUD-1, Kit Application Type:Power Management, Application Sub Type:Hot Swap Controller, Kit Contents:Demo Board LTC4226CUD-1 , RoHS Compliant: NA |
| DC1627A-B | 制造商:Linear Technology 功能描述:EVAL BOARD FOR LTC4226-2 制造商:Linear Technology 功能描述:DEMO BOARD, LTC4226 HOT SWAP CONTROLLER, Silicon Manufacturer:Linear Technology, Silicon Core Number:LTC4226CUD-2, Kit Application Type:Power Management, Application Sub Type:Hot Swap Controller, Kit Contents:Demo Board LTC4226CUD-2 , RoHS Compliant: NA |
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