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参数资料
| 型号： | RHFL4913SCA-01V |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 可调正电压单路输出标准稳压器 |
| 英文描述： | 1.23 V-9 V ADJUSTABLE POSITIVE REGULATOR, CBCC5 |
| 封装： | HERMETIC SEALED, CERAMIC, SMD-5 |
| 文件页数： | 14/16页 |
| 文件大小： | 417K |
| 代理商： | RHFL4913SCA-01V |
RHFL4913 ADJUSTABLE VERSION
Device description
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4
Device description
The RHFL4913 Adjustable contains a PNP type power element controlled by a signal resulting from
amplified comparison between the internal temperature compensated Band-Gap and the fraction of the
desired Output Voltage value obtained from an external resistor divider bridge. The device is protected by
several functional blocks.
4.1
ADJ Pin
The Load output voltage feed-back comes from an external divider resistor bridge middle point connected
to ADJ pin (allowing all possible output voltage settings as per User’s desire) established between Load
terminals.
4.2
INHIBIT ON-OFF Control
By setting INHIBIT pin TTL-High, the Device switches off the Output Current and Voltage. Device is ON
when INHIBIT pin is set Low. Since INHIBIT pin is internally pulled down, it can be left floating in case
Inhibit function is not utilized.
4.3
Overtemperature protection
A temperature detector internally monitors the power element junction temperature. The Device goes
OFF when approx. 175°C are reached, returning to ON mode when back to approx. 40°C. Combined with
other protection blocks, it protects the Device from destructive junction temperature excursions in all load
conditions. It is worth noting that when internal temperature detector reaches 175°C, the active power
element can be at 225°C: Extensive operation under these conditions far exceeds Maximum Operation
Ratings and Device reliability cannot be granted.
4.4
Overcurrent protection
An internal non-fold back Short-Circuit limitation is set with ISHORT > 3.8A (VO is 0V). This value can be
downward modified by an external resistor connected between ISC and VI pins, with a typical value range
of 10k
to 200k. To keep excellent VO regulation, it is necessary to set ISHORT 1.6 times greater than the
maximum desired application IO. When IO reaches ISHORT – 300mA, the current limitor overrules
Regulation and VO starts to drop and OCM flag is risen. When no current limitation adjustment is
required, ISC pin must be left unbiased (as it is in 3pin packages).
4.5
OCM pin
Goes Low when current limit starts to be active, otherwise VOCM = VI. It is buffered and can sink 10mA.
OCM pin is internally pulled-up by a 5 k
resistor.
4.6
Alternates to
RHFL4913 is recommended to replace all Industry Positive Regulators due to its exceptional Radiation
performance. To replace 3-terminal Industry devices, use RHFL4913 Fixed Voltage versions.
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相关代理商/技术参数 |
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| RHFL4913SCA07V | 制造商:STMicroelectronics 功能描述:ENGINEERING MODEL - Bulk |
| RHFL4913SCA-07V | 制造商:STMicroelectronics 功能描述:VREG - Bulk 制造商:STMicroelectronics 功能描述:REG LDO LIN ADJ POS 1.19V TO 9.3V 3A 5SMD5C - Bulk |
| RHFL4913SCA1 | 制造商:STMicroelectronics 功能描述:LDO Regulator Pos 1.19V to 9.3V 3A 5-Pin SMD5C 制造商:STMicroelectronics 功能描述:REG LDO LIN ADJ POS 1.19V TO 9.3V 3A - Bulk |
| RHFL4913SCA2 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Rad-hard adjustable positive voltage regulator |
| RHFL4913XX15 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Rad-hard positive fixed voltage regulator |
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