NCV891130PD33R2G

NCV891130 Step-Down Regulator Automotive, Low-Iq, Dual-Mode 1.2 A, 2 MHz www.onsemi.com The NCV891130 is a Dual Mode regulator intended for Automotive, battery−connected applications that must operate with up to a 45 V input supply. Depending on the output load, it operates either as a PWM Buck Converter or as a Low Drop−Out Linear Regulator, and is suitable for systems with low noise and Low Quiescent Current requirements often encountered in automotive driver information systems. A reset pin (with fixed delay) simplifies interfacing with a microcontroller. The NCV891130 also provides several protection features expected in automotive power supply systems such as current limit, short circuit protection, and thermal shutdown. In addition, the high switching frequency produces low output voltage ripple even when using small inductor values and an all−ceramic output filter capacitor – forming a space−efficient switching regulator solution. 8 1 SOIC−8 EXPOSED PAD CASE 751AC MARKING DIAGRAM 8 891130XX ALYW G Features • • • • • • • • • • • 30 mA Iq in Light Load Condition 1.2 A Maximum Output Current in PWM Mode Internal N−channel Power Switch VIN Operating Range 3.7 V to 36 V Withstands Load Dump to 45 V Logic Level Enable Pin can be Tied to Battery Fixed Output Voltage of 5.0 V, 4.0 V or 3.3 V 2 MHz Free−running Switching Frequency ±2 % Output Voltage Accuracy NCV Prefix for Automotive Requiring Site and Control Changes These Devices are Pb−Free and are RoHS Compliant Typical Applications • • • • Audio Infotainment Instrumentation Safety−Vision Systems NCV891130 VIN CIN RESET VIN DRV RSTB GND CDRV SW 1 With XX = 33 for 3.3 V Output = 40 for 4.0 V Output = 50 for 5.0 V Output A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb−Free Device PIN CONNECTIONS VIN 1 8 SW DRV 2 7 BST RSTB 3 6 VOUT GND 4 5 EN (Top View) DBST L1 CBST VOUT DFW BST COUT ORDERING INFORMATION See detailed ordering and shipping information on page 13 of this data sheet. VOUT EN EN Figure 1. Typical Application © Semiconductor Components Industries, LLC, 2016 August, 2019 − Rev. 1 1 Publication Order Number: NCV891130/D NCV891130 CDRV DBST VIN VIN CIN SW 3.3 V Reg VOUT Enable comp Soft−Start RESET EN EN + Switcher Supply ON MODE SELECTION LINEAR REGULATOR ON OVLD GND + − RESET VOLTAGES MONITORS 1.2 A detector + − + − + +S TSD COUT BST Low PWM LOGIC ON OFF Oscillator RSTB DFW CBST DRV VOUT L1 + Logic NCV891130 Figure 2. Simplified Block Diagram Table 1. PIN FUNCTION DESCRIPTION Pin No. Pin Name 1 VIN Input voltage from battery. Place an input filter capacitor in close proximity to this pin. 2 DRV Output voltage to provide a regulated voltage to the Power Switch gate driver. 3 RSTB Reset function. Open drain output, pulling down to ground when the output voltage is out of regulation. 4 GND Battery return, and output voltage ground reference. 5 EN This TTL compatible Enable input allows the direct connection of Battery as the enable signal. Grounding this input stops switching and reduces quiescent current draw to a minimum. 6 VOUT Output voltage feedback and LDO output. Feedback of output voltage used for regulation, as well as LDO output in LDO mode. 7 BST Bootstrap input provides drive voltage higher than VIN to the N−channel Power Switch for minimum switch Rdson and highest efficiency. 8 SW Switching node of the Regulator. Connect the output inductor and cathode of the freewheeling diode to this pin. EPAD Description Connect to Pin 4 (electrical ground) and to a low thermal resistance path to the ambient temperature environment. www.onsemi.com 2 NCV891130 Table 2. ABSOLUTE MAXIMUM RATINGS Rating Symbol Min/Max Voltage VIN Value Unit −0.3 to 45 V 45 V −0.7 to 40 V Max Voltage VIN to SW Min/Max Voltage SW Min Voltage SW − 20 ns −3.0 V Min/Max Voltage EN −0.3 to 40 V Min/Max Voltage VIN to EN −1.5 to 45 V Min/Max Voltage BST −0.3 to 43 V Min/Max Voltage BST to SW −0.3 to 3.6 V −0.3 to 6 V Min/Max Voltage VOUT −0.3 to 18 V Min/Max Voltage DRV −0.3 to 3.6 V 30 °C/W −55 to +150 °C TJ −40 to +150 °C VESD 2.0 kV MSL Level 2 Min/Max Voltage on RSTB Thermal Resistance, SOIC8−EP Junction–to–Ambient (Note 1) RθJA Storage Temperature range Operating Junction Temperature Range ESD withstand Voltage (Note 2) Human Body Model Moisture Sensitivity Peak Reflow Soldering Temperature (Note 3) 260 °C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. Value based on 4 layers of 645 mm2 (or 1 in2) of 1 oz copper thickness on FR4 PCB substrate. 2. This device series incorporates ESD protection and is tested by the following methods: ESD Human Body Model tested per AEC−Q100−002 (EIA/JESD22−A114) Latchup Current Maximum Rating: v150 mA per JEDEC standard: JESD78 3. For information, please refer to our Soldering and Mounting Techniques Reference Manual, SOLDERRM/D Table 3. ELECTRICAL CHARACTERISTICS VIN = 4.5 to 28 V, VEN = 5 V, VBST = VSW + 3 V, CDRV = 0.1 mF, for typical values TJ = 25°C, Min/Max values are valid for the temperature range −40°C v TJ v 150°C unless noted otherwise, and are guaranteed by test, design or statistical correlation (Notes 4, 5) Parameter Test Conditions Symbol Min Typ Max Unit Iq 30 39 mA IqSD 9 12 mA QUIESCENT CURRENT Quiescent Current, enabled VIN = 13.2 V, IOUT = 100 mA, 25°C Quiescent Current, shutdown VIN = 13.2 V, VEN = 0 V, 25°C UNDERVOLTAGE LOCKOUT – VIN (UVLO) UVLO Start Threshold VIN rising UVLO Stop Threshold VIN falling UVLO Hysteresis VUVLSTT 4.1 4.5 V VUVLSTP 3.1 3.7 V VUVLOHY 0.4 1.4 V tSS 0.8 1.4 2.0 ms 4.9 3.92 3.234 5.0 4.0 3.3 5.1 4.08 3.366 SOFT−START (SS) Soft−Start Completion Time OUTPUT VOLTAGE Output Voltage during regulation 100 mA < IOUT < 1.2 A 5.0 V option 4.0 V option 3.3 V option VOUTreg V 4. Refer to ABSOLUTE MAXIMUM RATINGS and APPLICATION INFORMATION for Safe Operating Area. 5. Performance guaranteed over the indicated operating temperature range by design and/or characterization tested at TJ = TA = 25°C. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible. www.onsemi.com 3 NCV891130 Table 3. ELECTRICAL CHARACTERISTICS VIN = 4.5 to 28 V, VEN = 5 V, VBST = VSW + 3 V, CDRV = 0.1 mF, for typical values TJ = 25°C, Min/Max values are valid for the temperature range −40°C v TJ v 150°C unless noted otherwise, and are guaranteed by test, design or statistical correlation (Notes 4, 5) Parameter Test Conditions Symbol Min Typ Max Unit FSW FSW(HV) 1.8 0.9 2.0 1.0 2.2 1.1 MHz Frequency Foldback Threshold VIN rising VIN falling VFLDUP VFLDDN 18.4 18 Frequency Foldback Hysteresis VFLDHY 0.2 INtoL 3 OSCILLATOR Frequency 4.5 < VIN < 18 V 20 V