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XR79206 Datasheet Preview

XR79206 Datasheet

6A Synchronous Step-Down COT Power Module

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XR79206
40V, 6A Synchronous Step-Down
COT Power Module
Description
The XR79206 is part of a family of 40V synchronous step-down
power modules combining the controller, drivers, inductor, passive
components and MOSFETs in a single package for point-of-load
supplies. This module requires very few external components leading
to ease of design and fast time to market. The XR79206 has load
current rating of 6A. A wide 5V to 40V input voltage range allows for
single supply operation from industry standard 24V ±10%, 18V to 36V
and rectified 18VAC and 24VAC rails.
With a proprietary emulated current mode Constant On-Time (COT)
control scheme, the XR79206 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 0.2% load
and 0.1% line regulation and maintains constant operating frequency.
A selectable power saving mode, allows the user to operate in
Discontinuous Current Mode (DCM) at light current loads significantly
increasing the converter efficiency.
A host of protection features, including overcurrent, over temperature,
short-circuit and UVLO, help achieve safe operation under abnormal
operating conditions.
The XR79206 is available in a RoHS-compliant, green/halogen-free
space-saving 10mm x 10mm x 4mm QFN package.
Typical Application
FEATURES
■■ 6A step-down power module
5V to 40V wide single input voltage
≥0.6V adjustable output voltage
■■ Controller, drivers, inductor, passive
components and MOSFETs integrated in
one package
■■ Proprietary constant on-time control
No loop compensation required
Stable with ceramic output capacitors
Programmable 100ns to 1µs on-time
Constant 400kHz to 800kHz frequency
Selectable CCM or DCM/CCM
operation
■■ Precision enable and power-good flag
■■ Programmable soft-start
■■ 10mm x 10mm x 4mm QFN package
APPLICATIONS
■■ Drones and remote vehicles
■■ Automotive displays
■■ FPGA/DSP/processor supplies
■■ Industrial control and automation
■■ Telecommunications and infrastructure
equipment
■■ Distributed power architecture
Ordering Information - Back Page
VIN
ENABLE/MODE
POWER GOOD
CIN RPGOOD
CVCC CSS
RON
VIN PVIN
EN/MODE
PGOOD
VOUT
VCC XR79206
SW
SS ILIM
TON
AGND
PGND
FB
RLIM
VOUT
CFF
RFF RFB1
RFB2
COUT
Figure 1. Typical Application
REV1C
100
95
90
85
80
75
70
65
60
0
700kHz
500kHz
12.0V
5.0V
3.3V
1.8V
123456
IOUT (A)
Figure 2. Efficiency, 24VIN
1/17




MaxLinear

XR79206 Datasheet Preview

XR79206 Datasheet

6A Synchronous Step-Down COT Power Module

No Preview Available !

XR79206
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 43V
VCC...................................................................................-0.3V to 6.0V
BST.................................................................-0.3V to 48V(1)
BST-SW.............................................................. -0.3V to 6V
SW, ILIM......................................................... -1V to 43V(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 seconds)................. 300°C
ESD rating (HBM – human body model)........................ 2kV
ESD rating (CDM – charged device model)................... 2kV
Operating Conditions
PVIN, VIN................................................................5V to 40V
SW, ILIM ........................................................ -1V to 40V(1)(2)
PGOOD, VCC, TON, SS, EN, FB.................... -0.3V to 5.5V
Switching frequency................................. 400kHz-800kHz(3)
Junction temperature range (TJ).................. -40°C to 125°C
Package power dissipation max at 25°C...................... 5.5W
Package thermal resistance θJA............................ 18.1°C/W
NOTES:
1. No external voltage applied.
2. SW pin’s DC range is -1V, transient is -5V for less than 50ns.
3. Recommended frequency for optimum performance.
Electrical Characteristics
TJ = 25°C, VIN = 24V, BST = VCC, SW = AGND = PGND = 0V, CVCC = 4.7μF, unless otherwise specified. Limits applying
over the full operating temperature range are denoted by a •.
Symbol Parameter
Conditions
Power Supply Characteristics
VIN Input voltage range
VCC regulating
IVIN VIN supply current
Not switching, VIN = 24V, VFB = 0.7V
f = 500kHz, RON = 124kΩ, VFB = 0.58V
IOFF Shutdown current
Enable = 0V, PVIN = VIN = 24V
Enable and Undervoltage Lock-Out (UVLO)
VIH_EN_1 EN pin rising threshold
VEN_HYS_1
VIH_EN_2
EN pin hysteresis
EN pin rising threshold for DCM/
CCM
VEN_HYS_2 EN pin hysteresis
VCC UVLO start threshold
VCC UVLO hysteresis
Rising edge
• Min Typ Max Units
•5
40 V
0.7 2 mA
10 mA
1 µA
• 1.8 1.9 2.0
70
• 2.8 3.0 3.1
110
• 4.00 4.25 4.40
• 195
V
mV
V
mV
V
mV
REV1C
2/17


Part Number XR79206
Description 6A Synchronous Step-Down COT Power Module
Maker MaxLinear
Total Page 17 Pages
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