DATASHEET ISL78307 FN7658 Rev.4.00 40V, Low Quiescent Current, 50mA Linear Regulator for Automotive Applications Aug 8, 2019 The ISL78307 is a high voltage, low quiescent current linear Features regulator ideally suited for always-on and keep alive Optimized for always-on automotive applications automotive applications. The ISL78307 operates from an input voltage of +6V to +40V under normal operating 18A typical quiescent current conditions and operates down to +3V under a cold crank. It Ensured 50mA output current consumes only 18A of quiescent current at no load on the Operates through cold crank down to 3V adjustable version. 40V tolerant logic level (TTL/CMOS) enable input The ISL78307 is available in fixed 3.3V, 5V, and adjustable output voltage (2.5V to 12V) options. It features an EN pin that 1.8A of typical shutdown current can be used to put the device into a low-quiescent current Low dropout voltage of 120mV at 50mA shutdown mode where it draws only 1.8A of supply current. Fixed +3.3V, +5.0V and adjustable output voltage options The device features over-temperature shutdown and current limit protection. Stable operation with 10F output capacitor The ISL78307 is AEC-Q100 qualified. It is rated across the Thermal shutdown and current limit protection -40C to +125C automotive temperature range and is -40C to +125C operating temperature range available in an 8 Ld EPSOIC with exposed pad package. Thermally enhanced 8 Ld exposed pad SOIC package Applications AEC-Q100 qualified Automotive 6kV ESD HBM rated Industrial Pb-free (RoHS compliant) Telecom Related Literature For a full list of related documents, visit our website ISL78307 product page V = 14V V = 12V V = 14V V = 5V IN OUT IN OUT OUT OUT IN IN C C OUT CIN COUT IN R1 10F 0.1F 10F 0.1F EN ADJ EN (ISL78307) (ISL78307) R2 GND GND FIGURE 1. TYPICAL APPLICATION - ADJ VERSION FIGURE 2. TYPICAL APPLICATION - FIXED VERSION 70 60 LOAD = 50mA 50 40 30 20 LOAD = 0mA 10 0 -50 0 50 100 150 TEMPERATURE (C) FIGURE 3. QUIESCENT CURRENT vs LOAD CURRENT (ADJ VERSION AT UNITY GAIN). V = 14V IN FN7658 Rev.4.00 Page 1 of 11 Aug 8, 2019 QUIESCENT CURRENT (A)ISL78307 Block Diagram VIN EN CONTROL LOGIC FET DRIVER + EA WITH CURRENT - LIMIT VOUT REFERENCE THERMAL + SENSOR SOFT-START ADJ GND Pin Configuration ISL78307 (8 LD EPSOIC) TOP VIEW IN 1 8 OUT NC 2 7 ADJ/NC NC 3 6 NC EN 4 5 GND Pin Descriptions PIN NUMBER PIN NAME DESCRIPTION 1 IN Input voltage pin. A minimum 0.1F X5R/X7R capacitor is required for proper operation. 2, 3, 6 NC Pins have internal termination and can be left unconnected. Connection to ground is optional. 4 EN High on this pin enables the device. 5 GND Ground pin. 7 ADJ/NC In the adjustable output voltage option, this pin is connected to the external feedback resistor divider which sets the LDO output voltage. In the 3.3V and 5V options, this pin is not used and can be connected to ground. 8 OUT Regulated output voltage. A 10F X5R/X7R output capacitor is required for stability. EPAD It is recommended to solder the EPAD to the ground plane. FN7658 Rev.4.00 Page 2 of 11 Aug 8, 2019