IR3876MPBF Datasheet, PDF (1/21 Pages) International Rectifier – 12A HIGHLY INTEGRATED WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR

PD-97763
IR3876MPBF
SupIRBuck^TM
12A HIGHLY INTEGRATED
WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR
Features
 Input Voltage Range: 3V to 21V
 Output Voltage Range: 0.5V to 12V
 Continuous 12A Load Capability
 Constant On-Time control
 Excellent Efficiency at very low output current levels
 Compensation Loop not Required
 Programmable switching frequency, soft start, and
over current protection
 Power Good Output
 Precision Voltage Reference (0.5V, +/-1%)
 Pre-bias Start Up
 Under/Over Voltage Fault Protection
 Ultra small, low profile 5mm x 6mm QFN Package
Applications
 Notebook and desktop computers
 Game consoles
 Consumer electronics – STB, LCD, TV, printers
 General purpose POL DC-DC converters
Description
The IR3876 SupIRBuck^TM is an easy-to-use,
fully integrated and highly efficient DC/DC
voltage regulator. The onboard constant on time
hysteretic controller and MOSFETs make
IR3876 a space-efficient solution that delivers up
to 12A of precisely controlled output voltage in
60^oC ambient temperature applications without
airflow.
Programmable switching frequency, soft start,
and over current protection allows for a very
flexible solution suitable for many different
applications and an ideal choice for battery
powered applications.
Additional features include pre-bias startup, very
precise 0.5V reference, over/under voltage shut
down, power good output, and enable input with
voltage monitoring capability.
V5
(4.5V-7.5 V)
R_FF
VIN
(3V-21V)
C_LDO
C_SS
VCC
FF
3VCBP
VIN _BOOT
PHASE
EN
IR 3876
PGND
PGOOD
SS
GND
ISET
FB
C_BOOT
L
R_ISET
VOUT
(0.5V-12V)
C0
R₁
R₂
1