XR76203-Q / XR76205-Q / XR76208-Q AEC-Q100 Qualified 40V 3A/5A/8A Synchronous Step Down COT Regulators F E A TU R E S General Description Automotive AEC-Q100 qualified The XR76203-Q, XR76205-Q and XR76208-Q are synchronous step- Temperature Grade 1: -40C to 125C down regulators combining the controller, drivers, bootstrap diode and HBM ESD Class Level 2 MOSFETs in a single package for point-of-load supplies well suited for CDM ESD Class Level C4B automotive applications. Qualified per AEC-Q100, the XR76203-Q, Controller, drivers, bootstrap diode and XR76205-Q and XR76208-Q have load current ratings of 3A, 5A and 8A MOSFETs integrated in one package respectively. A wide 5.5V to 40V input voltage range allows for single 3A, 5A and 8A step down regulators supply operation from 12V battery systems required to withstand load Wide 5.5V to 40V input voltage range dump, industry standard 24V 10%, 18V-36V, and rectified 18VAC and 0.6V adjustable output voltage 24VAC rails. Proprietary Constant On-Time control With a proprietary emulated current mode Constant On-Time (COT) No loop compensation required control scheme, the XR76203-Q, XR76205-Q and XR76208-Q provide Stable ceramic output capacitor operation extremely fast line and load transient response using ceramic output Programmable 200ns to 2s on-time capacitors. They require no loop compensation, simplifying circuit Constant 100kHz to 800kHz frequency implementation and reducing overall component count. The control loop Selectable CCM or CCM / DCM also provides 0.07% load and 0.15% line regulation and maintains CCM / DCM for high efficiency at light-load constant operating frequency. A selectable power saving mode allows the user to operate in discontinuous conduction mode (DCM) at light current CCM for constant frequency at light-load loads, thereby significantly increasing the converter efficiency. Programmable hiccup current limit with thermal compensation A host of protection features, including over-current, over-temperature, Precision enable and Power Good flag short-circuit, and UVLO helps achieve safe operation under abnormal Programmable soft-start operating conditions. 30-pin 5x5mm QFN package with wettable flanks The XR76203-Q, XR76205-Q and XR76208-Q are available in a RoHS- compliant, green / halogen-free, space-saving QFN 5x5mm package. A P P L IC A TI O NS Automotive systems Distributed power architecture Point-of-Load converters Power supply modules FPGA, DSP, and processor supplies Industrial and military Typical Application Ordering Information - Back Page 1 3.340 V IN 3.330 VIN PVIN C BST 3.320 Enable/Mode EN/MODE BST VOUT L1 3.310 Power Good PGOOD SW C IN 3.300 XR76208-Q VCC R XR76205-Q 3.290 R LIM C FF R1 XR76203-Q SS ILIM C 3.280 OUT TON FB 3.270 C C R VCC SS ON R2 AGND PGND 3.260 5 101520 2530 3540 V (V) IN Line Regulation 1. 1 / 22 Rev 1E V (V) OU TXR76203-Q / XR76205-Q / XR76208-Q Absolute Maximum Ratings Operating Conditions PV .................................................................................5V to 40V Stresses beyond the limits listed below may cause IN permanent damage to the device. Exposure to any V ................................................................................5.5V to 40V IN Absolute Maximum Rating condition for extended periods (1) may affect device reliability and lifetime. SW, ILIM.....................................................................-1V to 40V PV , V .....................................................................-0.3V to 43V IN IN PGOOD, V , T , SS, EN, FB.................................-0.3V to 5.5V CC ON V .............................................................................-0.3V to 6.0V (3) CC Switching frequency......................................100kHz to 800kHz (1) BST..........................................................................-0.3V to 48V Junction temperature range................................-40C to +125C BST-SW.........................................................................-0.3V to 6V XR76203-Q package thermal resistance, ....................28C/W JA (1, 2) SW, ILIM..................................................................-1V to 43V XR76205-Q package thermal resistance, ..................26C/W JA... ALL other pins...................................................-0.3V to VCC+0.3V XR76208-Q package thermal resistance, ..................25C/W JA... Storage temperature............................................-65C to +150C XR76203-Q package power dissipation at 25C.....................3.6W Junction temperature...........................................................150C XR76205-Q package power dissipation at 25C.....................3.8W Power dissipation................................................Internally Limited XR76208-Q package power dissipation at 25C.....................4.0W Lead temperature (Soldering, 10 sec)..................................300C ESD rating (HBM - Human Body Model)...............................2kV Note 1: No external voltage applied. Note 2: SW pins minimum DC range is -1V, transient is -5V for less than ESD rating (Charged Device Model (CDM) per AEC Q100-011, 50ns. Non-corner pins...................................................................500V Note 3: Recommended frequency. ESD Rating (Charged Device Model (CDM) per AEC Q100-011, Corner pins 1, 7, 8, 14, 15, 22, 23, 30..................................750V Electrical Characteristics Unless otherwise noted: T = 25C, V = 24V, BST = V , SW = AGND = PGND = 0V, C = 4.7F. Limits applying over J IN CC VCC the full operating temperature range are denoted by a Symbol Parameter Conditions Min Typ Max Units Power Supply Characteristics V VCC regulating 5.5 40 Input voltage range V IN I VIN input supply current Not switching, V = 24V, V = 0.7V 0.7 2 mA VIN IN FB I VIN input supply current (XR76203-Q) f = 300kHz, R = 215k, VFB = 0.58V 12 mA VIN ON I VIN input supply current (XR76205-Q) f = 300kHz, R = 215k, VFB = 0.58V 15 mA VIN ON I VIN input supply current (XR76208-Q) f = 300kHz, R = 215k, VFB = 0.58V 19 mA VIN ON I Shutdown current Enable = 0V, V = 12V 1 A OFF IN Enable and Under-Voltage Lock-Out UVLO V EN pin rising threshold 1.8 1.9 2.0 V IH EN 1 V EN pin hysteresis 70 mV EN H 1 V EN pin rising threshold for DCM / CCM 2.8 3.0 3.1 V IH EN 2 operation V EN pin hysteresis 100 mV EN H 2 2 / 22 Rev 1E