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XR76208EL-Q Datasheet(PDF) 6 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) 6 Page - Exar Corporation

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exar.com/XR76203-Q/XR76205-Q/XR76208-Q
Rev 1C
©2016-2017 Exar Corporation
Pin Assignments
Type: A = Analog, I = Input, O = Output, I/O = Input/Output, PWR = Power, OD = Open-Drain
Pin No.
Pin Name
Type
Description
1
ILIM
A
Over-current protection programming. Connect with a resistor to SW.
2
EN/MODE
I
Precision enable pin. Pulling this pin above 1.9V will turn the regulator on and it will operate in
CCM. If the voltage is raised above 3.0V then the regulator will operate in DCM/CCM depend-
ing on load
3
TON
A
Constant on-time programming pin. Connect with a resistor to AGND.
4
SS
A
Soft-Start pin. Connect an external capacitor between SS and AGND to program the soft-start
rate based on the 10uA internal source current.
5
PGOOD
O, OD
Power-good output. This open-drain output is pulled low when VOUT is outside the regulation.
6
FB
A
Feedback input to feedback comparator. Connect with a set of resistors to VOUT and AGND
in order to program VOUT.
7, 10, AGND
Pad
AGND
A
Signal ground for control circuitry. Connect AGND Pad with a short trace to pins 7 and 10.
8
VIN
A
Supply input for the regulator’s LDO. Normally it is connected to PVIN.
9
VCC
A
The output of regulator’s LDO. For operation using a 5V rail, VCC should be shorted to VIN.
11-14, 20,
29, SW Pad
SW
PWR
Switch node. Drain of the low-side N-channel MOSFET. Source of the high-side MOSFET is
wire-bonded to the SW Pad. Pins 20 and 29 are internally connected to SW pad.
15-19,
PGND Pad
PGND
PWR
Ground of the power stage. Should be connected to the system’s power ground plane. Source
of the low-side MOSFET is wire-bonded to PGND Pad.
21-28, PVIN
Pad
PVIN
PWR
Input voltage for power stage. Drain of the high-side N-channel MOSFET.
30
BST
A
High-side driver supply pin. Connect a bootstrap capacitor between BST and pin 29.


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