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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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A5974D 데이터시트(PDF) 1 Page - STMicroelectronics |
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A5974D 데이터시트(HTML) 1 Page - STMicroelectronics |
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1 / 46 page  This is information on a product in full production. June 2014 DocID018774 Rev 2 1/46 A5974D Up to 2.5 A step-down switching regulator for automotive applications Datasheet - production data Features Qualified following the AEC-Q100 requirements (see PPAP for more details) 2.5 A DC output current Operating input voltage from 4 V to 36 V 3.3 V / (± 2%) reference voltage Output voltage adjustable from 1.235 V to 35 V Low dropout operation: 100% duty cycle 250 kHz internally fixed frequency Voltage feed-forward Zero load current operation Internal current limiting Inhibit for zero current consumption Synchronization Protection against feedback disconnection Thermal shutdown Application Dedicated to automotive applications Description The A5974D is a step-down monolithic power switching regulator with a minimum switch current limit of 3.1 A, so it is able to deliver up to 2.5 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an HSOP8 package with an exposed frame, that allows to reduce the Rth(JA) down to approximately 40 °C/W. The device uses an internal P-channel DMOS transistor (with a typical RDS(on) of 250 m) as a switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 250 kHz. Having a minimum input voltage of 4 V only it fits the automotive applications requiring the device operation even in cold crank conditions. A pulse- by-pulse current limit with the internal frequency modulation offers an effective constant current short-circuit protection. HSOP8 - exposed pad Figure 1. Application schematic small signal power plane =4V TO 36V TP3 GND TP3 GND D1 D1 VOUT 1 VCC 8 VREF 6 EX-PAD 9 INH 3 COMP 4 GND 7 FB 5 SYNC 2 U1 A5974D U1 A5974D C9 330uF C9 330uF TP2 VOUT TP2 VOUT C3 100p C3 100p TP4 GND TP4 GND L1 15uH L1 15uH C4 33nF C4 33nF R3 10K R3 10K R1 5.6K R1 5.6K C2 68nF 50V C2 68nF 50V C1 10uF 50V C1 10uF 50V TP1 VIN TP1 VIN R2 3.3K R2 3.3K www.st.com |
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