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LM2793

Features: `Two Regulated Current Outputs, up to 16mA Each, Matched to Within ±0.3% (typ.)`High Efficiency, 1.5x Regulated Charge Pump`Input Voltage Range: 2.7V to 5.5V`Soft Start Limits Inrush Current`Analog Voltage Brightness Control`PWM Brightness Control`Very Small Solution Size - NO INDUCTOR`5...

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SeekIC No. : 004395062 Detail

LM2793: Features: `Two Regulated Current Outputs, up to 16mA Each, Matched to Within ±0.3% (typ.)`High Efficiency, 1.5x Regulated Charge Pump`Input Voltage Range: 2.7V to 5.5V`Soft Start Limits Inrush Curre...

LM2793 Data Sheet

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Part Number:
LM2793
Supply Ability:
5000

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

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Product Details

Description



Features:

`Two Regulated Current Outputs, up to 16mA Each, Matched to Within ±0.3% (typ.)
`High Efficiency, 1.5x Regulated Charge Pump
`Input Voltage Range: 2.7V to 5.5V
`Soft Start Limits Inrush Current
`Analog Voltage Brightness Control
`PWM Brightness Control
`Very Small Solution Size - NO INDUCTOR
`500kHz Switching Frequency
`3A (typ.) Shutdown Current
`LLP-10 Package: 3.0mm X 3.0mm X 0.8mm


Application

·White LED Display Backlights
·White LED Keypad Backlights
·1-Cell LiIon Battery-Operated Equipment Including PDAs, Hand-held PCs, Cellular Phones
·Flat Panel Displays


Pinout

Connection Diagram


Specifications

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VIN.......................................................... -0.3V to 6.0V
VSD-BRGT............... -0.3V to (VIN + 0.3V) w/ 6.0V max
Continuous Power Dissipation (Note
4)..................................................... Internally Limited
Junction Temperature (TJ-MAX-ABS) ...................150
Storage Temperature Range ................-65 to 150
Lead Temp. (Soldering, 5 sec.) ...........................260
ESD Rating (Note 5)
Human Body Model ................................................2kV
Machine Model .....................................................200V


Description

The LM2793 is a highly efficient, semi-regulated 1.5x CMOS charge pump that provides dual constant current outputs. The LM2793 has an input voltage range of 2.7V to 5.5V. To control LED brightness, the amount of current driven to the current-mode outputs can be adjusted with an analog voltage and/or a pulse-width-modulated (PWM) square wave.

Pre-regulation of the charge pump minimizes conducted noise on the input. Combined with a fixed switching frequency of 500kHz, the LM2793 is a low-noise solution. The LM2793 is available in a 10-pin Leadless Lead-frame package: LLP-10.




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