LM2754SQX/NOPB National Semiconductor, LM2754SQX/NOPB Datasheet - Page 3

• Manufacturer Part Number: LM2754SQX/NOPB
• Description: IC LED DRIVER PHOTO FLASH 24-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Photo Flash LEDr

Specifications of LM2754SQX/NOPB

• Constant Current: Yes
• Topology: Switched Capacitor (Charge Pump)
• Number Of Outputs: 4
• Internal Driver: Yes
• Type - Primary: Flash/Torch
• Type - Secondary: White LED
• Frequency: 700kHz ~ 1.3MHz
• Voltage - Supply: 2.8 V ~ 5.5 V
• Voltage - Output: 4.7 V ~ 5.1 V
• Mounting Type: Surface Mount
• Package / Case: 24-LLP
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 800mA
• Internal Switch(s): Yes
• Efficiency: 90%
• For Use With: LM2754SQEV - BOARD EVALUATION LM2754SQ
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM2754SQX

V
I
V
V
R
I
I
f
V
V
I
I
Dx
Q
SD
SW
IH
IL
Symbol
SETx
HR
OUT
IH
IL
OUT
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
Limits in standard typeface are for T
range (-40˚C to +125 ˚C). Unless otherwise noted, specifications apply to the LM2754 Typical Application Circuit (pg.1) with
V
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation of
the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the
Electrical Characteristics tables.
Note 2: All voltages are with respect to the potential at the GND pin.
Note 3: Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T
120˚C (typ.).
Note 4: The Human-body model is a 100 pF capacitor discharged through a 1.5kΩ resistor into each pin.
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
dissipation of the device in the application (P
following equation: T
Note 6: Junction-to-ambient thermal resistance (θ
standard JESD51-7. The test board is a 4 layer FR-4 board measuring 102mm x 76mm x 1.6mm. The 2 imbedded copper layers cover roughly the same area as
the board. Thickness of copper layers are 70µm/35µm/35µm/70µm (2oz/1oz/1oz/2oz). Thermal vias are placed between the die attach pad in the 1st copper layer
/I
V
EN, T/F, TX, SEL pins
Continuous Power Dissipation
(Note 3)
Junction Temperature
(T
Storage Temperature Range
Lead Temp. (Soldering, 5 sec.)
ESD Rating (Note 4)
(IN, INSW)
SETx
IN
J-MAX-ABS
Human Body Model
, V
OUT
I
LED Current to Set Current
Ratio (Note 11)
Current Sink Headroom
Voltage (Note 10)
Output Voltage
Output Impedance
Quiescent Supply Current
Shutdown Supply Current
Switching Frequency
Logic Input High
Logic Input Low
Logic Input High Current
(Note 9)
Logic Input Low Current
(Note 9)
= 3.6V, V
SETx
pins
)
Pin Voltage
A-MAX
Parameter
EN
= T
= 1.8V, V
J-MAX-OP
- (θ
T/F
JA
A-MAX
= 0V, V
D-MAX
x P
J
-0.3V to (V
= 25˚C, and limits in boldface type apply over the full operating junction temperature
D-MAX
JA
) is dependent on the maximum operation junction temperature (T
R
I
I
I
I
1x Mode, I
1.5x Mode, I
2x Mode, I
1x Mode
1.5x Mode
2x Mode
1x Mode, I
1.5x Mode, I
2x Mode, I
V
Input Pins: EN, T/F, TX, SEL
Input Pins: EN, T/F, TX, SEL
V
V
Dx
Dx
Dx
Dx
), and the junction-to ambient thermal resistance of the part/package in the application (θ
) is taken from a thermal modeling result, performed under the conditions and guidelines set forth in the JEDEC
EN
(EN, T/F, TX, SEL)
(EN, T/F, TX, SEL)
SETx
Internally Limited
TX
= 50mA to 100mA
= 200mA
= 200mA
= 50mA
-65˚C to 150˚C
).
= 0V
-0.3V to 6.0V
(Notes 2, 7)
= 0V, V
w/ 6.0V max
= 20kΩ
(Notes 1, 2)
IN
Dx
Dx
Dx
Dx
+ 0.3V)
Dx
Dx
150˚C
260˚C
= 0mA
= 0mA
= 0mA
= 0mA
SEL
2kV
= 0mA
= 0mA
Conditions
= 1.8V
= 0V
= 0V, C
3
IN
Operating Ratings
Thermal Information
= C
Input Voltage (V
Junction Temperature Range (T
Ambient Temperature Range (T
(Note 5)
Junction-to-Ambient Thermal Resistance,
LLP-24 Package (θ
1
= C
2
= 2.2µF, C
IN
)
−11.5%
JA
−3.5%
−7%
Min
OUT
0.7
1.2
)
(Note 6)
= 4.7µF. (Note 8)
J-MAX-OP
J
=150˚C (typ.) and disengages at T
(Notes 1, 2)
1.244
0.25
A
Typ
J
795
820
550
150
4.7
4.7
5.1
1.3
1.5
0.7
3.4
6.3
0.1
0.5
)
)
1
4
= 125
o
C), the maximum power
+11.5%
-40˚C to +125˚C
+3.5%
-40˚C to +85 ˚C
+7%
Max
JA
1.3
0.4
8
1
), as given by the
2.8V to 5.5V
www.national.com
42˚C/W
mA/mA
Units
MHz
mV
mA
µA
µA
µA
Ω
V
V
V
J
=