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LM2653

Features: `Efficiency up to 97%`4V to 14V input voltage range`1.5V to 5.0V adjustable output voltage`0.1W Switch On Resistance`300 kHz fixed frequency internal oscillator`7 A shutdown current`Patented current sensing for current mode control`Input undervoltage lockout`Output overvoltage shutdown p...

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SeekIC No. : 004394953 Detail

LM2653: Features: `Efficiency up to 97%`4V to 14V input voltage range`1.5V to 5.0V adjustable output voltage`0.1W Switch On Resistance`300 kHz fixed frequency internal oscillator`7 A shutdown current`Patent...

LM2653 Data Sheet

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Part Number:
LM2653
Supply Ability:
5000

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  • 1~5000
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  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

`Efficiency up to 97%
`4V to 14V input voltage range
`1.5V to 5.0V adjustable output voltage
`0.1W Switch On Resistance
`300 kHz fixed frequency internal oscillator
`7 A 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




Application

·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




Pinout

Connection Diagram




Specifications

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Input Voltage.......................................................... 15V
PGOOD Pin Voltage ................................................. 15V
Feedback Pin Voltage .......................−0.4V VFB 5V
Power Dissipation (TA =25),
(Note 2) ............................................................893 mW
Junction Temperature
Range ...........................................−40 TJ +125
Storage Temperature Range ...............−65 to +150
Lead Temperature
M Package
Vapor Phase (60 sec.) ..........................................215
Infrared (15 sec.) .................................................220
Maximum Junction Temperature ...........................150
ESD Susceptibility
Human Body Model (Note 3) ..................................1 kV

Output Current 1500 mA
Input Min Voltage 4 Volt
Input Max Voltage 14 Volt
Output Min 1.5 Volt
Output Max 5 Volt
Frequency Min 300 kHz
Frequency Max 300 kHz
Efficiency (peak) 97 %
On/Off Pin Yes
Error Flag Yes
SoftStart Yes
Sync Pin No
Inverting No
Flyback No
RegType Switching Regulator
Temperature Min -40 deg C
Temperature Max 125 deg C
Adjustable Output Yes
Adj Switch Frequency No
PWM Mode Current
Topology Synchronous Buck
Special Features Max. Iq at shutdown is 20uA over full temp range, 7uA typical
Step-Down Yes
Multiple Output Capability No
Output Power Undefined Watt
Output Voltage Undefined Volt
Output Range 1.5V to 5.0V
Switching Frequency 300 kHz
Feedback Voltage Undefined Volt
Regulator Family Undefined
Synchronous Rectification Yes
View Using Catalog





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 7A. 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.






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