LM2753SD/NOPB National Semiconductor, LM2753SD/NOPB Datasheet

IC LED DRIVER PHOTO FLASH 10-LLP

LM2753SD/NOPB

Manufacturer Part Number
LM2753SD/NOPB
Description
IC LED DRIVER PHOTO FLASH 10-LLP
Manufacturer
National Semiconductor
Type
Photo Flash LEDr
Datasheet

Specifications of LM2753SD/NOPB

Topology
PWM, Switched Capacitor (Charge Pump)
Number Of Outputs
1
Internal Driver
Yes
Type - Primary
Flash/Torch
Type - Secondary
White LED
Frequency
725kHz
Voltage - Supply
3 V ~ 5.5 V
Voltage - Output
5V
Mounting Type
Surface Mount
Package / Case
10-LLP
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
250mA
Internal Switch(s)
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Efficiency
-
Other names
LM2753SD
LM2753SDTR
© 2007 National Semiconductor Corporation
LM2753
High Power Switched Capacitor Voltage Convertor/Flash
LED Driver
General Description
The LM2753 is capable of driving a Flash LED with a pulsed
current of 400mA at an input voltage of 3.6V. A switched ca-
pacitor doubler, the LM2753 provides a regulated 5V output
(V
switched output, I
provide maximum current to a Flash LED. Flash LED current
is set via a ballast resistor. Continuous illumination current
(Torch Mode) is programmed by connecting a resistor be-
tween I
cost ceramic capacitors.
LM2753 uses Pulse Frequency Modulation (PFM) regulation.
Typical operating frequency is 725kHz. Under no-load condi-
tions, LM2753 operates on only 60µA. If the output is con-
nected to ground, the charge pump stays in the gain of 1
which helps limit the input current to 300mA (typ.)
LM2753 is available in a 10-pin No Pullback Leadless Lead-
frame Package: LLP-10.
Typical Application Circuit
Connection Diagram
OUT
) over an input supply range of 3.0V to 5.5V. The
OUT
and V
OUT
OUT
. This device uses only three small, low-
, takes less than 10ns to turn on and
201406
Features
Applications
Input Voltage Range: 3.0V to 5.5V
Regulated 5V Output
250mA Output Current with a 3.6V input
400mA Pulsed Output Current (up to 500ms duration)
60µA (typ.) Quiescent Current
PFM Regulation
Inductor-less solution: requires only 3 small capacitors
<1µA Typical Shutdown Current
10-pin LLP Package (No Pullback):
3mm x 3mm x 0.8mm
Cell Phone Camera Flash
General Purpose Regulated Voltage Output, High Current
Supply
20140601
November 2006
www.national.com

Related parts for LM2753SD/NOPB

LM2753SD/NOPB Summary of contents

Page 1

... LM2753 is available in a 10-pin No Pullback Leadless Lead- frame Package: LLP-10. Typical Application Circuit Connection Diagram © 2007 National Semiconductor Corporation Features ■ Input Voltage Range: 3.0V to 5.5V ■ Regulated 5V Output ■ ...

Page 2

Pin Descriptions Pin # Name FLASH 5 GND GND 8 I OUT 9 V OUT 10 GND Ordering Information Output Voltage Ordering Number 5.0V LM2753SD 5.0V LM2753SDX ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. If Military/Aerospace specified devices are required, please contact the National semiconductor Sales/Office/Distributors for availability and specifications. V Pin: Voltage to Ground IN EN, Flash pins: Voltage to GND ...

Page 4

Note 5: In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may have to be derated. Maximum ambient temperature (T A-MAX dissipation of the device in the application (P - (θ following ...

Page 5

Typical Performance Characteristics GND, V(EN 10.0µ OUT Quiescent Current vs. Input Voltage Oscillator Frequency vs. Input Voltage Start-up Behavior V = 3.6V, Load = 100mA IN Top Scale: ...

Page 6

Flash Pulse Response V = 3.6V, Load = 10mA - 400mA Step IN Top Scale: 1V/Div FLASH Middle Scale: 1V/Div IOUT Bottom Scale: 100mA/Div IOUT Time scale: 100ms/Div Output Voltage Ripple vs. Input Voltage ...

Page 7

Application Information CIRCUIT DESCRIPTION The LM2753 is a Switched Capacitor Doubler with a regulated 5V output capable of continuously supplying up to 200mA load connected This device uses Pulse OUT Frequency ...

Page 8

When the output voltage is above the target reg- ulation voltage the part idles, consuming minimal supply cur- rent with C is connected between V 1 disconnected ...

Page 9

LM2753 has a switch array with multiple switches con- nected in parallel. The number of switches used in parallel depends on the input voltage applied to the LM2753. At lower input voltages all paralleled switches are used, and as ...

Page 10

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 10-Pin LLP NS Package Number SDA10A 10 ...

Page 11

Notes 11 www.national.com ...

Page 12

... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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