LM27313 (ACTIVE) 具有 30V 内部 FET 开关(采用 SOT-23 封装)的 1.6 MHz 升压转换器
The LM27313 switching regulator is a current-mode boost converter with a fixed operating frequency of 1.6 MHz.
The use of the SOT-23 package, made possible by the minimal losses of the 800 mA switch, and small inductors and capacitors result in extremely high power density. The 30V internal switch makes these solutions perfect for boosting to voltages of 5V to 28V.
This part has a logic-level shutdown pin that can be used to reduce quiescent current and extend battery life.
Protection is provided through cycle-by-cycle current limiting and thermal shutdown. Internal compensation simplifies design and reduces component count
- LM27313-Q1 is an Automotive Grade Product that is AEC-Q100 Grade 1 Qualified (-40°C to +125°C Operating Junction Temperature)
- 30V DMOS FET Switch
- 1.6 MHz Switching Frequency
- Low RDS(ON) DMOS FET
- Switch Current up to 800 mA
- Wide Input Voltage Range (2.7V–14V)
- Low Shutdown Current (<1 µA)
- 5-Lead SOT-23 Package
- Uses Tiny Capacitors and Inductors
- Cycle-by-Cycle Current Limiting
- Internally Compensated
SETTING THE OUTPUT VOLTAGE
The output voltage is set using the external resistors R1 and R2 (see Typical Application Circuits).
A value of 13.3 kΩ is recommended for R2 to establish a divider current of approximately 92 µA.
R1 is calculated using the formula: R1 = R2 x ( (VOUT / VFB) − 1 )
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