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XR76121 Datasheet(PDF) 2 Page - Exar Corporation

Part # XR76121
Description  PowerBloxTM 20A Synchronous Step-Down COT Regulators
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

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XR
76121
2/18
REV1A
Absolute Maximum Ratings
These are stress ratings only and functional operation
of the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Stresses beyond those listed under
absolute maximum ratings may cause permanent damage
to the device. Exposure to any absolute maximum rating
condition for extended periods may affect device reliability
and lifetime.
PVIN, VIN.........................................................................-0.3V to 25V
VCC ..................................................................................-0.3V to 6.0V
BST................................................................-0.3V to 31V(1)
BST-SW............................................................. -0.3V to 6V
SW, ILIM........................................................ -1V to 25V(1)(2)
All other pins......................................... -0.3V to VCC + 0.3V
Storage temperature.................................... -65°C to 150°C
Junction temperature................................................. 150°C
Power dissipation ...................................... Internally limited
Lead temperature (soldering, 10 second).................. 300°C
ESD rating (HBM – human body model) ....................... 2kV
ESD rating (CDM – charged device model) .................. 1kV
ESD rating (MM – machine model) ............................. 200V
Operating Conditions
PVIN......................................................................3V to 22V
VIN .....................................................................4.5V to 22V
VCC...................................................................4.5V to 5.5V
SW, ILIM ..........................................................-1V to 22V(2)
PGOOD, TON, SS, EN.................................-0.3V to 5.5V(2)
Switching frequency ................................... 200kHz-1MHz(3)
Junction temperature range (TJ).................. -40°C to 125°C
Package power dissipation max at 25°C..................... 4.1W
Package thermal resistance
θJA ....................................24°C/W(4)
NOTES:
1. No external voltage applied.
2. SW pin’s DC range is -1V, transient is -5V for less than 50ns.
3. Recommended.
4. Measured on Exar evaluation board.
Electrical Characteristics
Specifications are for operating junction temperature of TJ = 25°C only; limits applying over the full operating junction
temperature range are denoted by a •. Typical values represent the most likely parametric norm at TJ = 25°C, and are
provided for reference purposes only. Unless otherwise indicated, VIN = 12V, SW = AGND = PGND = 0V, CVCC = 4.7uF.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Power Supply Characteristics
VIN
Input voltage range
VCC regulating
5
12
22
V
VCC tied to VIN
4.5
5.0
5.5
IVIN
VIN supply current
Not switching, VIN = 12V, VFB = 0.7V
0.8
1.3
mA
IVCC
VCC quiescent current
Not switching, VCC = VIN = 5V,
VFB = 0.7V
0.8
1.3
mA
IVIN
VIN supply current
f = 600kHz, RON = 49.9k,
VFB = 0.58V
17
mA
IOFF
Shutdown current
Enable = 0V, PVIN = VIN = 12V
1
μA
Enable and Undervoltage Lock-Out UVLO
VIH_EN
EN pin rising threshold
1.8
1.9
2.0
V
VEN_HYS
EN pin hysteresis
60
mV
VCC UVLO start threshold, rising edge
4.00
4.25
4.40
V
VCC UVLO hysteresis
100
170
mV


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