The AEC-Q100 qualified XR76203-Q, XR76205-Q and XR76208-Q are
synchronous step-down regulators combining the controller, drivers,
bootstrap diode and MOSFETs in a single package for point-of-load
supplies well suited for automotive applications. The XR76203-Q,
XR76205-Q and XR76208-Q have load current ratings of 3A, 5A and
8A, respectively. A wide 5.5V to 40V input voltage range allows for
single supply operation from industry standard 24V ±10%, 18V to 36V
and rectified 18VAC and 24VAC rails and 12V battery systems requiring
inherent load dump protection.
With a proprietary emulated current mode Constant On-Time (COT)
control scheme, the XR76203-Q, XR76205-Q and XR76208-Q provide
extremely fast line and load transient response using ceramic output
capacitors. They require no loop compensation, simplifying circuit
implementation and reducing overall component count. The control
loop also provides 0.07% load and 0.15% line regulation and maintains
constant operating frequency. A selectable power saving mode allows
the user to operate in Discontinuous Conduction Mode (DCM) at light
current loads thereby significantly increasing the converter efficiency.
A host of protection features, including overcurrent, over temperature,
short-circuit and UVLO, helps achieve safe operation under abnormal
operating conditions. These 40V regulators deliver power to a wide
range of automotive, industrial and military equipment.
OVERVIEW
XR76203-Q 40V, 3A
XR76205-Q 40V, 5A
XR76208-Q 40V, 8A
FEATURES
Automotive AEC-Q100 Qualified
Temperature Grade 1: -40°C to 125°C
HBM ESD Class Level 2
CDM ESD Class Level C4B
Controller, drivers, bootstrap diode and
MOSFETs integrated in one package
3A, 5A and 8A step-down regulators
5.5V to 40V operating range
3V to 40V PVIN with 5V bias
≥0.6V adjustable output voltage
Patented COT control
Programmable 200ns to 2μs on-time
Constant 100kHz to 800kHz frequency
Selectable CCM or CCM/DCM
CCM/DCM for high efficiency at light load
CCM for constant frequency at light load
Programmable hiccup current limit with thermal
compensation
Precision enable and power good flag
Programmable soft-start
Common scalable footprint 30-pin, 5mm x 5mm
QFN package with wettable flanks
BENEFITS
Excellent line and load regulation compared to
standard COT
Stable with ceramic output capacitors
No compensation required
Fast transient response with ability to work with
low ESR capacitors
APPLICATIONS
Automotive systems
Infotainment head units
Advanced Driver Assistance Systems (ADAS)
Distributed power architecture
Point-of-Load (POL) converters
Power supply modules
FPGA, DSP and processor supplies
Industrial and military applications
XR76203-Q, XR76205-Q and XR76208-Q
AEC-Q100 Qualified 40V 3A/5A/8A
PowerBlox
™
Synchronous
Step-Down Regulators
