XR79115 Module Datasheet

XR79115 Datasheet PDF, Equivalent


Part Number

XR79115

Description

22V 15A Synchronous Step-Down COT Power Module

Manufacture

MaxLinear

Total Page 18 Pages
PDF Download
Download XR79115 Datasheet PDF


XR79115
XR79115
22V, 15A Synchronous Step Down COT Power Module
General Description
The XR79115 is a 15A synchronous step-down Power Module for point-of
load supplies. 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 XR79115 provides extremely fast line and load
transient response using ceramic output capacitors. It requires no loop
compensation hence simplifying circuit implementation and reducing
overall component count. The control loop also provides 0.35% load and
0.1% 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. With a 96% peak efficiency and 90% for loads as low
as 100mA, the XR79115 is suitable for applications where low power
losses are important.
A host of protection features, including over-current, over-temperature,
short-circuit and UVLO, help achieve safe operation under abnormal
operating conditions.
The XR79115 is available in a RoHS compliant, green / halogen free
space-saving 68-pin 12x12x4mm QFN package. With integrated
controller, drivers, bootstrap diode and capacitor, MOSFETs, inductor,
CIN and COUT, this solution allows the smallest possible 15A POL
design.
FEATURES
Controller, drivers, bootstrap diode and
capacitor, MOSFETs, Inductor, CIN and COUT
integrated in one package
15A Step Down Module
Wide 5V to 22V 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 400kHz to 600kHz 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
68-pin 12x12x4mm QFN package
APPLICATIONS
Networking and Communications
Fast Transient Point-of-Loads
Industrial and Medical Equipment
Embedded High Power FPGA
Ordering Information – back page
Typical Application
VIN
Enable/Mode
Power Good
CIN
R3
VIN PVIN
EN/MODE
PGOOD
VOUT
VCC XR79115 SW
SS ILIM
CVCC
CSS
TON
RON
AGND
FB
PGND
RLIM
Line Regulation
1.220
1.215
VOUT
1.210
1.205
1.200
R1 1.195
COUT
1.190
R2 1.185
1.180
4 6 8 10 12 14 16 18 20 22
VIN (V)
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Rev 1C

XR79115
XR79115
Absolute Maximum Ratings
Stresses beyond the limits listed below may cause perma-
nent damage to the device. Exposure to any Absolute Max-
imum 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 31V1
BST-SW.......................................................................-0.3V to 6V
SW, ILIM...................................................................-1V to 25V1, 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)......................260°C MSL3
ESD Rating (HBM - Human Body Model)...............................2kV
Operating Conditions
PVIN...............................................................................3V to 22V
VIN..............................................................................4.5V to 22V
VCC............................................................................4.5V to 5.5V
SW, ILIM.....................................................................-1V to 22V1
PGOOD, VCC, TON, SS, EN, FB...............................-0.3V to 5.5V
Switching Frequency......................................400kHz to 600kHz3
Junction Temperature Range..............................-40°C to +125°C
JEDEC51 Package Thermal Resistance, JA................15.4°C/W
Package Power Dissipation at 25°C.......................................6.5W
Note 1: No external voltage applied.
Note 2: SW pin’s minimum DC range is -1V, transient is -5V for less than
50ns.
Note 3: Recommended frequency for optimum performance
Electrical Characteristics
Unless otherwise noted: TJ= 25°C, VIN=12V, BST=VCC, SW=AGND=PGND=0V, CVCC=4.7uF. Limits applying over the full
operating temperature range are denoted by a “•”
Symbol
Parameter
Conditions
Min Typ Max
Power Supply Characteristics
VIN Input Voltage Range
VCC regulating
VCC tied to VIN
5
4.5
22
5.5
IVIN
IVCC
VIN Input Supply Current
VCC Quiescent Current
Not switching, VIN = 12V, VFB = 0.7V
Not switching, VCC=VIN = 5V, VFB = 0.7V
0.7 2
0.7 2
IVIN VIN Input Supply Current
f=500kHz, RON=61.9k, VFB=0.58V
17
IOFF Shutdown Current
Enable = 0V, VIN = 12V
1
Enable and Under-Voltage Lock-Out UVLO
VIH_EN
EN Pin Rising Threshold
1.8 1.9 2.0
VEN_HYS
VIH_EN
EN Pin Hysteresis
EN Pin Rising Threshold for DCM/
CCM operation
50
2.8 3.0 3.1
VEN_HYS EN Pin Hysteresis
100
Units
V
mA
mA
mA
μA
V
mV
V
mV
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exar.com/XR79115
Rev 1C


Features XR79115 22V, 15A Synchronous Step Down C OT Power Module General Description Th e XR79115 is a 15A synchronous step-dow n Power Module for point-of load suppli es. A wide 5V to 22V input voltage rang e allows for single supply operation fr om industry standard 5V, 12V, and 19.6V rails. With a proprietary emulated cur rent mode Constant On-Time (COT) contro l scheme, the XR79115 provides extremel y fast line and load transient response using ceramic output capacitors. It re quires no loop compensation hence simpl ifying circuit implementation and reduc ing overall component count. The contro l loop also provides 0.35% load and 0.1 % line regulation and maintains constan t operating frequency. A selectable pow er saving mode allows the user to opera te in discontinuous mode (DCM) at light current loads thereby significantly in creasing the converter efficiency. With a 96% peak efficiency and 90% for load s as low as 100mA, the XR79115 is suita ble for applications where low power losses are important. A ho.
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