ISL78210 Datasheet, PDF (1/17 Pages) Intersil Corporation – Automotive PWM DC/DC Voltage Controller

Automotive PWM DC/DC Voltage Controller
ISL78210
The ISL78210 IC is a Single-Phase Synchronous-Buck
PWM voltage controller featuring Intersil’s Robust Ripple
Regulator (R³â„¢) Technology. The ISL78210 provides a
low cost solution for compact high performance
applications.The wide 3.3V to 25V input voltage range is
ideal for systems that run on battery or AC adapter
power sources. Resistor programmed output voltage
setpoint and capacitor programmed soft-start delay allow
for fast and easy implementation. Robust integrated
MOSFET drivers and Schottky bootstrap diode reduce the
implementation area and lower component cost.
Intersil’s R³ Technology™ combines the best features of
both fixed-frequency and hysteretic PWM control. The
PWM frequency is 300kHz during static operation,
becoming variable during changes in load, setpoint
voltage, and input voltage when changing between
battery and AC adapter power. The modulators ability to
change the PWM switching frequency during these
events in conjunction with external loop compensation
produces superior transient response. For maximum
efficiency, the converter automatically enters
diode-emulation mode (DEM) during light-load conditions
such as system standby.
Pin Configuration
ISL78210
(16 LD 2.6X1.8 µTQFN)
TOP VIEW
GND 1
EN 2
NC 3
SREF ⁴
12 ^BOOT
11 ^UGATE
10 ^PHASE
9 OCSET
Features
• Input Voltage Range: 3.3V to 25V
• Output Voltage Range: 0.5V to 3.3V
• Output Load to 30A
• Simple Resistor Programming for Output Voltage
• ±0.75% System Accuracy: -40°C to +105°C
• Capacitor Programming for Soft-Start Delay
• Fixed 300kHz PWM Frequency in Continuous
Conduction
• External Compensation Affords Optimum Control Loop
Tuning
• Automatic Diode Emulation Mode for Highest
Efficiency
• Integrated High-Current MOSFET Drivers and
Schottky Boot-Strap Diode for Optimal Efficiency
• Choice of Overcurrent Detection Schemes
- Lossless Inductor DCR Current Sensing
- Precision Resistive Current Sensing
• Power-Good Monitor for Soft-Start and Fault
Detection
• Fault Protection
- Undervoltage
- Overvoltage
- Overcurrent (DCR-Sense or Resistive-Sense
Capability)
- Over-Temperature Protection
- Fault Identification by PGOOD Pull-Down
Resistance
• TS16949 Compliant
• Fully AEC-Q100 tested
• Pb-Free (RoHS Compliant)
Applications*(see page 16)
• Automotive PC Graphical Processing Unit VCC Rail
• Automotive PC I/O Controller Hub (ICH) VCC Rail
• Automotive PC Memory Controller Hub (GMCH) VCC
Rail
March 8, 2010
FN7583.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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