COT Controller. XR75100 Datasheet

XR75100 Controller. Datasheet pdf. Equivalent

Part XR75100
Description 40V Synchronous Step Down COT Controller
Feature XR75100 40V Synchronous Step Down COT Controller General Description The XR75100 is a synchronous s.
Manufacture Maxlinear
Datasheet
Download XR75100 Datasheet




XR75100
XR75100
40V Synchronous Step Down COT Controller
General Description
The XR75100 is a synchronous step-down controller for point-of load
supplies up to 20A. A wide 5.5V to 40V input voltage range allows for
single supply operation from industry standard 12V, 18V, and 24V DC and
AC rails.
With a proprietary emulated current mode Constant On-Time (COT)
control scheme, the XR75100 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 exceptional load
and 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 XR75100 is available in a RoHS compliant, green / halogen free
space-saving 16-pin 3x3mm QFN package.
FEATURES
20A capable step-down controller
Wide 5.5V to 40V input voltage range
Integrated high current 2A / 3A drivers
0.6 to 30V adjustable output voltage
Proprietary Constant On-Time control
No loop compensation required
Stable ceramic output capacitor operation
Programmable 200ns to 2µs on-time
Constant 100kHz to 800kHz frequency
Selectable CCM or CCM / DCM operation
Programmable hiccup current limit with
thermal compensation
Precision enable and Power Good flag
Programmable soft-start
Integrated bootstrap diode
16-pin 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
CBST
VIN BST
EN/MODE
GH
PGOOD
SW
VCC XR75100 ILIM
RLIM
SS GL
CVCC CSS
RON
TON
AGND
FB
PGND
Q1
L1
VOUT
Q2 CFF R1
R2
COUT
3.340
3.330
3.320
3.310
3.300
3.290
3.280
3.270
3.260
5
+0.5%
Typical
-0.5%
10 15 20 25 30
VIN (V)
1 / 16
maxlinear.com/XR75100
Rev 1E



XR75100
XR75100
Absolute Maximum Ratings
Stresses beyond the limits listed below may cause
permanent damage to the device. Exposure to any
Absolute Maximum Rating condition for extended periods
may affect device reliability and lifetime.
VIN.............................................................................-0.3V to 43V
VCC...........................................................................-0.3V to 6.0V
BST..........................................................................-0.3V to 48V2
BST-SW.......................................................................-0.3V to 6V
SW, ILIM..................................................................-5V to 43V1, 2
GH...................................................................-0.3V to BST+0.3V
GH-SW........................................................................-0.3V to 6V
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 Conditions
VIN.............................................................................-0.3V to 40V
VCC...........................................................................-0.3V to 5.5V
SW, ILIM.....................................................................-1V to 40V1
PGOOD, TON, SS, EN, GL, FB................................-0.3V to 5.5V
Switching frequency.......................................100kHz to 800kHz3
Junction temperature range..............................-40°C to +125°C
Note 1: SW pin’s minimum DC range is -1V, transient is -5V for less than
50ns.
Note 2: No external voltage applied.
Note 3: Recommended
Electrical Characteristics
Unless otherwise noted: TJ= 25°C, VIN = 24V, BST = VCC, SW = AGND = PGND = 0V, CGH = CGL = 3.3nF, 4.7µF at
VCC-AGND. Limits applying over the full operating temperature range are denoted by a “•”
Symbol
Parameter
Conditions
Power Supply Characteristics
VIN Input voltage range
IVIN VIN input supply current
IOFF Shutdown current
Enable and Under-Voltage Lock-Out UVLO
VIH_EN
EN pin rising threshold
VEN_HYS EN pin hysteresis
VIH_EN
EN pin rising threshold for DCM/CCM
operation
VEN_HYS EN pin hysteresis
VCC UVLO start threshold, rising
edge
VCC regulating
Not switching, VIN = 24V, VFB = 0.7V
f = 300kHz, RON = 215k, VFB = 0.58V
Enable = 0V, VIN = 24V
Min Typ Max
Units
5.5
40
0.7 2
11
0.1
V
mA
mA
µA
1.8 1.9 2.0
50
2.9 3.0 3.1
100
4.00 4.25 4.50
V
mV
V
mV
V
2 / 16
maxlinear.com/XR75100
Rev 1E







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