Switching Regulator. LM2653 Datasheet

LM2653 Regulator. Datasheet pdf. Equivalent


Part LM2653
Description 1.5A High Efficiency Synchronous Switching Regulator
Feature LM2653 www.ti.com SNVS050E – NOVEMBER 1999 – REVISED APRIL 2013 LM2653 1.5A High Efficiency Synch.
Manufacture etcTI
Datasheet
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LM2653 1.5A High Efficiency Synchronous Switching Regulator LM2653 Datasheet
LM2653 www.ti.com SNVS050E – NOVEMBER 1999 – REVISED APRIL LM2653 Datasheet
Recommendation Recommendation Datasheet LM2653 Datasheet




LM2653
LM2653
www.ti.com
SNVS050E – NOVEMBER 1999 – REVISED APRIL 2013
LM2653 1.5A High Efficiency Synchronous Switching Regulator
Check for Samples: LM2653
FEATURES
1
2 Efficiency up to 97%
• 4V to 14V Input Voltage Range
• 1.5V to 5.0V Adjustable Output Voltage
• 0.1Ω Switch On Resistance
• 300 kHz Fixed Frequency Internal Oscillator
• 7 μA Shutdown Current
• Patented Current Sensing for Current Mode
Control
• Input Undervoltage Lockout
• Output Overvoltage Shutdown Protection
• Output Undervoltage Shutdown Protection
• Adjustable Soft-Start
• Adjustable PGOOD Delay
• Current Limit and Thermal Shutdown
APPLICATIONS
• Webpad
• Personal Digital Assistants (PDAs)
• Computer Peripherals
• Battery-Powered Devices
• Notebook Computer Video Supply
• Handheld Scanners
• GXM I/O and Core Voltage
• High Efficiency 5V Conversion
DESCRIPTION
The LM2653 switching regulator provides high
efficient power conversion over a 100:1 load range
(1.5A to 15 mA). This feature makes the LM2653 an
ideal fit in battery-powered applications.
Synchronous rectification is used to achieve up to
97% efficiency. At light loads, the LM2653 enters a
low power hysteretic or “sleep” mode to keep the
efficiency high. In many applications, the efficiency
still exceeds 80% at 15 mA load. A shutdown pin is
available to disable the LM2653 and reduce the
supply current to 7µA.
All the power, control, and drive functions are
integrated within the ICs. The ICs contain patented
current sensing circuity for current mode control. This
feature eliminates the external current sensing
resistor required by other current-mode DC-DC
converters.
The ICs have a 300 kHz fixed frequency internal
oscillator. The high oscillator frequency allows the
use of extremely small, low profile components.
Protection features include thermal shutdown, input
undervoltage lockout, adjustable soft-start, cycle by
cycle current limit, output overvoltage and
undervoltage protections.
Typical Application
Efficiency vs Load Current
(VIN = 5V, VOUT = 3.3V)
Figure 1.
Figure 2.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1999–2013, Texas Instruments Incorporated



LM2653
LM2653
SNVS050E – NOVEMBER 1999 – REVISED APRIL 2013
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings(1)(2)(3)
Input Voltage
PGOOD Pin Voltage
Feedback Pin Voltage
Power Dissipation (TA =25°C) (4)
Junction Temperature Range
Storage Temperature Range
Lead Temperature
PW Package
Maximum Junction Temperature
ESD Susceptibility
Vapor Phase (60 sec.)
Infrared (15 sec.)
Human Body Model (3)
15V
15V
0.4V VFB 5V
893 mW
40°C TJ +125°C
65°C to +150°C
215°C
220°C
150°C
1 kV
(1) Absolute Maxmum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but device parameter specifications may not be specified under these conditions. For
specified specifications and test conditions, see Electrical Characteristics.
(2) If Military/Aerospace specified devices are required, please contact the TI Sales Office/ Distributors for availability and specifications.
(3) The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
(4) The maximum allowable power dissipation is calculated by using PDMAX = (TJMAX TA)/θJA, where TJMAX is the maximum junction
temperature, TA is the ambient temperature, and θJA is the junction-to-ambient thermal resistance of the specified package. The 893
mW rating results from using 150°C, 25°C, and 140°C/W for TJMAX, TA, and θJA respectively. A θJA of 140°C/W represents the worst-
case condition of no heat sinking of the 16-pin TSSOP package. Heat sinking allows the safe dissipation of more power. The Absolute
Maximum power dissipation must be derated by 7.14 mW per °C above 25°C ambient. The LM2653 actively limits its junction
temperatures to about 165°C.
Operating Ratings(1)
Supply Voltage
4V VIN 14V
(1) Absolute Maxmum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but device parameter specifications may not be specified under these conditions. For
specified specifications and test conditions, see Electrical Characteristics.
Electrical Characteristics
Specifications with standard typeface are for TJ = 25°C, and those in boldface type apply over full Operating Temperature
Range. VIN = 10V unless otherwise specified.
Symbol
Parameter
Conditions
Typical (1)
Limit (2)
Units
VFB Feedback Voltage
ILOAD = 900 mA
1.238
1.200
1.263
V
V(min)
V(max)
VOUT
VINUV
Output Voltage Line
Regulation
Output Voltage Load
Regulation
Output Voltage Load
Regulation
VIN Undervoltage Lockout
Threshold Voltage
VIN = 4V to 12V
ILOAD = 900 mA
ILOAD = 10 mA to 1.5A
VIN = 5V
ILOAD = 200 mA to 1.5A
VIN = 5V
Rising Edge
0.2 %
1.3 %
0.3 %
3.8 V
3.95 V(max)
VUV_HYST
Hysteresis for the Input
Undervoltage Lockout
210 mV
ICL
Switch Current Limit
VIN = 5V
VOUT = 2.5V
2.0 A
1.55 A(min)
2.60 A(max)
ISM Sleep Mode Threshold Current VIN = 5V, VOUT = 2.5V
100
mA
(1) All limits specified at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits
are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control
(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
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