XR76203-Q Datasheet PDF - Exar
| Part Number | XR76203-Q | |
| Description | 3A/5A/8A Synchronous Step Down COT Regulator | |
| Manufacturers | Exar | |
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There is a preview and XR76203-Q download ( pdf file ) link at the bottom of this page. Total 20 Pages | ||
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XR76203-Q/XR76205-Q/XR76208-Q
AEC-Q100 Qualified 40V PowerBloxTM
3A/5A/8A Synchronous Step Down COT Regulator
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.
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
Typical Application
VIN
Enable/Mode
Power Good
CIN
R
VIN PVIN
EN/MODE
BST
PGOOD
SW
XR76208-Q
VCC XR76205-Q
SS XR76203-Q ILIM
CVCC
CSS
TON
RON AGND
FB
PGND
CBST
RLIM
1
L1
CFF R1
R2
1.
Ordering Information - Back Page
VOUT
COUT
3.340
3.330
3.320
3.310
3.300
3.290
3.280
3.270
3.260
5
10 15 20 25 30 35 40
VIN (V)
Line Regulation
©2016-2017 Exar Corporation
1 / 20
exar.com/XR76203-Q/XR76205-Q/XR76208-Q
Rev 1C
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Pin Configuration, Top View
XR76203-Q/XR76205-Q/XR76208-Q
BST
30
SW PVIN PVIN PVIN PVIN PVIN PVIN
29 28 27 26 25 24 23
ILIM 1
EN 2
TON 3
SS 4
PGOOD 5
FB 6
AGND 7
PVIN PAD
22 PVIN
21 PVIN
20 SW
19 PGND
AGND PAD
SW PAD
18 PGND
PGND 17
PAD
PGND
16 PGND
8 9 10 11
VIN VCC AGND SW
12 13 14
SW SW SW
15 PGND
©2016-2017 Exar Corporation
5 / 20
exar.com/XR76203-Q/XR76205-Q/XR76208-Q
Rev 1C
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for XR76203-Q electronic component. |
| Information | Total 20 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ XR76203-Q.PDF Datasheet ] | |
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