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XR76115 Datasheet Preview

XR76115 Datasheet

15A Synchronous Step Down COT Regulator

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XR76115
15A Synchronous Step Down COT Regulator
General Description
The XR76115 is a synchronous step-down regulator combining
the controller, drivers, bootstrap diode and MOSFETs in a single
package for point-of-load supplies. The XR76115 has a load
current rating of 15A. A wide 5V to 22V input voltage range allows
for single supply operation from industry standard 5V, 12V and
19.6V rails.
With a proprietary emulated current mode Constant On-Time
(COT) control scheme, the XR76115 provides extremely fast line
and load transient response using ceramic output capacitors. It
requires no loop compensation, simplifying circuit implementation
and reducing overall component count. The control loop also
provides 0.25% load and 0.12% line regulation and maintains
constant operating frequency. A selectable power saving mode
allows the user to operate in discontinuous 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, help achieve safe operation
under abnormal operating conditions.
The XR76115 is available in a RoHS-compliant, green / halogen-
free, space-saving QFN 6x6mm package.
Typical Application
Figure 1: XR76115 Application Diagram
FEATURES
15A capable step down regulator
4.5V to 5.5V low VIN operation
5V to 22V wide single input voltage
≥0.6V adjustable output voltage
Controller, drivers, bootstrap diode and
MOSFETs integrated in one package
Proprietary Constant On-Time control
No loop compensation required
Ceramic output capacitor stable
operation
Programmable 200ns - 2µs on-time
Quasi constant 200kHz - 800kHz
frequency
Selectable CCM or CCM / DCM
operation
Precision enable and Power-Good flag
Programmable soft-start
6x6mm 37-pin QFN package
APPLICATIONS
Distributed power architecture
Point-of-Load converters
Power supply modules
FPGA, DSP, and processor supplies
Base stations, switches / routers, and
server
1.220
1.215
1.210
1.205
1.200
1.195
1.190
1.185
1.180
5
10 15
VIN (V)
20
Figure 2: XR76115 Line Regulation
www.maxlinear.com
Rev 1D




MaxLinear

XR76115 Datasheet Preview

XR76115 Datasheet

15A Synchronous Step Down COT Regulator

No Preview Available !

XR76115
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 sec) ....................................300°C
ESD rating (HBM - Human Body Model)................................... 2kV
Operating Ratings
PVIN .................................................................................3V to 22V
VIN ................................................................................4.5V to 22V
VCC ..............................................................................4.5V to 5.5V
SW, ILIM ....................................................................... -1V to 22V(2)
PGOOD, VCC, TON, SS, EN..........................................-0.3V to 5.5V
Switching Frequency .........................................200kHz - 800kHz(3)
Junction Temperature Range (TJ) ............................-40°C to 125°C
XR76115 Package Power Dissipation max at 25°C ................ 5.2W
XR76115 JEDEC51 Package Thermal Resistance θJA........ 19°C/W
Note 1: No external voltage applied
Note 2: SW pin’s DC range is -1V, transient is -5V for less than 50ns
Note 3: Recommended
Ordering Information(1)
Part Number
XR76115EL-F
XR76115ELTR-F
XR76115EVB
Operating Temperature Range
-40°C≤TJ≤+125°C
-40°C≤TJ≤+125°C
Package
6x6mm QFN
6x6mm QFN
XR76115 Evaluation Board
Packing Method
Bulk
Tape & Reel
NOTES:
1. Refer to www.maxlinear.com/XR76115 for most up-to-date Ordering Information.
2. Visit www.maxlinear.com for additional information on Environmental Rating.
Lead-Free(2)
Yes
Yes
Electrical Characteristics
Specifications are for the 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.
Parameter
Min.
Power Supply Characteristics
VIN, input voltage range
5
4.5
IVIN, VIN supply current
IVCC, VCC quiescent current
IVIN, VIN supply current
IOFF, shutdown current
Enable and Under-Voltage Lock-Out UVLO
VIH_EN, EN pin rising threshold
1.8
VEN_HYS, EN pin hysteresis
VIH_EN, EN pin rising threshold for
DCM / CCM operation
2.8
VEN_HYS, EN pin hysteresis
VCC UVLO start threshold, rising edge
4.00
VCC UVLO hysteresis
Typ.
12
5.0
0.7
0.7
11
0.5
1.9
50
3.0
100
4.25
200
Max. Units
Conditions
22
5.5
1.3
1.3
2.0
3.1
4.50
V
VCC regulating
VCC tied to VIN
mA • Not switching, VIN = 12V, VFB = 0.7V
mA • Not switching, VCC = VIN = 5V, VFB = 0.7V
mA f = 300kHz, RON = 107k, VFB = 0.58V
μA Enable = 0V, VIN = 12V, VIN = PVIN
V•
mV
V•
mV
V•
mV
2/15
www.maxlinear.com
Rev. 1D


Part Number XR76115
Description 15A Synchronous Step Down COT Regulator
Maker MaxLinear
Total Page 15 Pages
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