DATASHEET ISL78210 FN7583 Rev 1.00 Automotive PWM DC/DC Voltage Controller December 4, 2013 The ISL78210 IC is a Single-Phase Synchronous-Buck PWM Features voltage controller featuring Intersils Robust Ripple Regulator Input Voltage Range: 3.3V to 25V (R3) Technology. The ISL78210 provides a low cost solution for compact high performance applications. The wide 3.3V to Output Voltage Range: 0.5V to 3.3V 25V input voltage range is ideal for systems that run on battery Output Load to 30A or AC adapter power sources. Resistor programmed output Simple Resistor Programming for Output Voltage voltage setpoint and capacitor programmed soft-start delay allow for fast and easy implementation. Robust integrated 0.75% System Accuracy: -40C to +105C MOSFET drivers and Schottky bootstrap diode reduce the Capacitor Programming for Soft-Start Delay implementation area and lower component cost. Fixed 300kHz PWM Frequency in Continuous Conduction Intersils R3 Technology combines the best features of both External Compensation Affords Optimum Control Loop Tuning fixed-frequency and hysteretic PWM control. The PWM frequency is 300kHz during static operation, becoming Automatic Diode Emulation Mode for Highest Efficiency variable during changes in load, setpoint voltage, and input Integrated High-Current MOSFET Drivers and Schottky voltage when changing between battery and AC adapter Boot-Strap Diode for Optimal Efficiency power. The modulators ability to change the PWM switching Choice of Overcurrent Detection Schemes frequency during these events in conjunction with external loop compensation produces superior transient response. For - Lossless Inductor DCR Current Sensing maximum efficiency, the converter automatically enters - Precision Resistive Current Sensing diode-emulation mode (DEM) during light-load conditions such Power-Good Monitor for Soft-Start and Fault Detection as system standby. Fault Protection Pin Configuration -Undervoltage ISL78210 -Overvoltage (16 LD 2.6X1.8 TQFN) - Overcurrent (DCR-Sense or Resistive-Sense Capability) TOP VIEW - Over-Temperature Protection - Fault Identification by PGOOD Pull-Down Resistance Fully AEC-Q100 tested Pb-Free (RoHS Compliant) GND 1 12 BOOT Applications EN 2 11 UGATE Automotive PC Graphical Processing Unit VCC Rail NC 3 10 PHASE Automotive PC I/O Controller Hub (ICH) VCC Rail 4 9 OCSET Automotive PC Memory Controller Hub (GMCH) VCC Rail SREF FN7583 Rev 1.00 Page 1 of 17 December 4, 2013 PGND NC 5 16 LGATE PGOOD 6 15 FB 7 PVCC 14 VO VCC 8 13ISL78210 Pin Descriptions PIN SYMBOL DESCRIPTION 1 GND IC ground for bias supply and signal reference. 2 EN Enable input for the IC. Pulling EN above the VENTHR rising threshold voltage initializes the soft-start sequence. 3, 5 NC No internal connection. Pins 3 and 5 should be connected to the GND pin. 4 SREF Soft-start programming capacitor input. Connects internally to the inverting input of the VSET voltage setpoint amplifier. 6 PGOOD Power-good open-drain indicator output. This pin changes to high impedance when the converter is able to supply regulated voltage. The pull-down resistance between the PGOOD pin and the GND pin identifies which protective fault has shut down the regulator. See Table 1 on page 10. 7 FB Voltage feedback sense input. Connects internally to the inverting input of the control-loop error amplifier. The converter is in regulation when the voltage at the FB pin equals the voltage on the SREF pin. The control loop compensation network connects between the FB pin and the converter output. See Figure 8 on page 11. 8 VO Output voltage sense input for the R3 modulator. The VO pin also serves as the reference input for the overcurrent detection circuit. See Figure 5 on page 7. 9 OCSET Input for the overcurrent detection circuit. The overcurrent setpoint programming resistor ROCSET connects from this pin to the sense node. See OVERCURRENT PROGRAMMING CIRCUIT on page 7. 10 PHASE Return current path for the UGATE high-side MOSFET driver. VIN sense input for the R3 modulator. Inductor current polarity detector input. Connect to junction of output inductor, high-side MOSFET, and low-side MOSFET. See Application Schematics on page 4 (Figures 2 and 3). 11 UGATE High-side MOSFET gate driver output. Connect to the gate terminal of the high-side MOSFET of the converter. 12 BOOT Positive input supply for the UGATE high-side MOSFET gate driver. The BOOT pin is internally connected to the cathode of the Schottky boot-strap diode. Connect an MLCC between the BOOT pin and the PHASE pin. 13 VCC Input for the IC bias voltage. Connect +5V to the VCC pin and decouple with at least a 1F MLCC to the GND pin. See Application Schematics on page 4 (Figures 2 and 3). 14 PVCC Input for the LGATE and UGATE MOSFET driver circuits. The PVCC pin is internally connected to the anode of the Schottky boot-strap diode. Connect +5V to the PVCC pin and decouple with a 10F MLCC to the PGND pin. See Application Schematics on page 4 (Figures 2 and 3). 15 LGATE Low-side MOSFET gate driver output. Connect to the gate terminal of the low-side MOSFET of the converter. 16 PGND Return current path for the LGATE MOSFET driver. Connect to the source of the low-side MOSFET. Ordering Information PACKAGE PART NUMBER PART TEMP RANGE Tape & Reel PKG. (Notes 1, 2, 3) MARKING (C) (Pb-Free) DWG. ISL78210ARUZ-T GAT -40 to +105 16 Ld 2.6x1.8 TQFN L16.2.6x1.8A 1. Please refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets molding compounds/die attach materials and NiPdAu plate - e4 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL78210. For more information on MSL please see techbrief TB363. FN7583 Rev 1.00 Page 2 of 17 December 4, 2013