Description:The ISL78301 is a high voltage, low quiescent current linear regulator ideally suited for “always-on” and “keep alive” automotive applications. The ISL78301 operates from an input voltage of +6V to +40V under normal operating conditions and operates down to +3V under a cold crank. It consumes only 18µA of quiescent current at no load on the adjustable version. The ISL78301 is available in a fixed 3. 3V, 5V and adjustable output voltage (2. 5V to 12V) options. It features an EN pin that can be used to put th
SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Cel):
260
Regulator Type:
FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
Screening Level:
AEC-Q100
Seated Height-Max:
1.2 mm
Surface Mount:
YES
Terminal Finish:
Pure Matte Tin (Sn) - annealed
Terminal Form:
GULL WING
Terminal Pitch:
0.65 mm
Terminal Position:
DUAL
Time@Peak Reflow Temperature-Max (s):
30
Voltage Tolerance-Max:
1%
Width:
4.4 mm
ISL78301FVEAZ Frequently Asked Questions (FAQs)
Renesas provides a recommended PCB layout guide in their application note AN1965, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
The selection of input and output capacitors depends on the specific requirements of your application, including the input voltage range, output voltage, and desired ripple and noise performance. Renesas provides guidance on capacitor selection in their application note AN1964, which includes a capacitor selection table and design considerations.
While the datasheet specifies an operating temperature range of -40°C to +125°C, the maximum ambient temperature range for reliable operation depends on the specific application and cooling conditions. As a general guideline, Renesas recommends keeping the junction temperature below 125°C to ensure reliable operation and minimize the risk of thermal shutdown.
The ISL78301FVEAZ has built-in overcurrent protection and fault detection features, including overcurrent limit (OCL) and overvoltage protection (OVP). To implement these features, engineers can use the OCL and OVP pins to detect faults and shut down the device in case of an overcurrent or overvoltage event. Renesas provides more information on fault detection and protection in their application note AN1963.
To ensure reliable startup and minimize the risk of latch-up or damage, Renesas recommends a specific startup sequence, including powering up the input voltage, followed by the enable pin, and then the output voltage. The recommended startup sequence is outlined in the datasheet and application notes.
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ISL78301FVEAZ Overview
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