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XR76208EL-Q Datasheet(PDF) 1 Page - Exar Corporation

Part # XR76208EL-Q
Description  AEC-Q100 Qualified 40V PowerBloxTM 3A/5A/8A Synchronous Step Down COT Regulator
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XR76208EL-Q Datasheet(HTML) 1 Page - Exar Corporation

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XR76203-Q/XR76205-Q/XR76208-Q
AEC-Q100 Qualified 40V PowerBloxTM
3A/5A/8A Synchronous Step Down COT Regulator
exar.com/XR76203-Q/XR76205-Q/XR76208-Q
Rev 1C
1 / 20
©2016-2017 Exar Corporation
General Description
The 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. Qualified per AEC-Q100, 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 sup-
ply operation from 12V battery systems required to withstand load dump,
industry standard 24V ±10%, 18V-36V, and rectified 18VAC and 24VAC
rails.
With a proprietary emulated current mode Constant On-Time (COT) con-
trol 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 imple-
mentation 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 over-current, over-temperature,
short-circuit and UVLO, helps achieve safe operation under abnormal
operating conditions.
The XR76203/5/8-Q are available in a RoHS-compliant, green/halogen-
free space-saving QFN 5x5mm package.
Typical Application
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 MOS-
FETs integrated in one package
3A, 5A and 8A Step Down Regulators
Wide 5.5V to 40V Input Voltage Range
0.6V Adjustable Output Voltage
Proprietary Constant On-Time Control
No Loop Compensation Required
Stable Ceramic Output Capacitor Operation
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
30-pin 5x5mm QFN package with wettable flanks
APPLICATIONS
Automotive Systems
Distributed Power Architecture
Point-of-Load Converters
Power Supply Modules
FPGA, DSP, and Processor Supplies
Industrial and Military
Ordering Information - Back Page
1
1.
3.260
3.270
3.280
3.290
3.300
3.310
3.320
3.330
3.340
5
10152025303540
VIN (V)
PGND
FB
ILIM
SW
BST
XR76208-Q
VIN
EN/MODE
PGOOD
VCC
SS
TON
AGND
CSS
RON
CVCC
Enable/Mode
Power Good
R
VIN
VOUT
RLIM
CBST
L1
CFF
R1
R2
COUT
CIN
XR76205-Q
PVIN
XR76203-Q
Line Regulation


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