LM3502SQX-25/NOPB National Semiconductor, LM3502SQX-25/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM3502SQX-25/NOPB
• Description: IC LED DRIVR WHITE BCKLGT 16-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Backlight, White LEDr

Specifications of LM3502SQX-25/NOPB

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 2
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 800kHz ~ 1.2MHz
• Voltage - Supply: 2.5 V ~ 5.5 V
• Voltage - Output: 23 V ~ 24 V
• Mounting Type: Surface Mount
• Package / Case: 16-LLP
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 600mA
• Internal Switch(s): Yes
• Efficiency: 80%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM3502SQX-25

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V
I
V
I
I
F
R
R
R
D
I
I
I
Q
CL
Fb
Cntrl
Sw
V OUT1
Symbol
S
IN
Fb
DS(ON)
PDS(ON)
NDS(ON)
MAX
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Preliminary Electrical Characteristics
Limits in bold typeface apply over the full operating junction temperature range (−40˚C ≤ T
specified, V
V
Sw Pin
Fb Pin
Cntrl Pin
V
V
En1
En2
Continuous Power Dissipation
Maximum Junction Temperature
Storage Temperature Range
IN
OUT1
OUT2
(T
(OFF) V
Pin
J-MAX)
Pin
Pin
Input Voltage
Non-Switching
Switching
Shutdown
Low I
Feedback Voltage
NMOS Power Switch
Current Limit
Feedback Pin Bias
Current (Note 8)
Switching Frequency
NMOS Power Switch
ON Resistance
(Figure 2: N1)
PMOS ON Resistance
of V
(Figure 2: N1)
NMOS ON Resistance
of V
(Figure 2: N2)
Maximum Duty Cycle
Cntrl Pin Input Bias
Current (Note 3)
Sw Pin Leakage
Current (Note 3)
Current (Note 3)
OUT1
IN
= 2.5V.
OUT1
OUT2
Q
Parameter
Pin Leakage
Shutdown
/V
/Fb Switch
OUT2
Switch
Fb
Fb = 0V, Sw Is Floating
Cntrl = 0V
Cntrl = 1.5V, En1 = En2 = 0V
−16, Fb = 0V
−25, Fb = 0V
−35, Fb = 0V
−44, Fb = 0V
Fb = 0.25V
I
I
I
Fb = 0V
Cntrl = 2.5V
Cntrl = 0V
Sw = 42V, Cntrl = 0V
V
V
V
V
Sw
PMOS
NMOS
OUT1
OUT1
OUT1
OUT1
>
= 500 mA
0.25V
= 20 mA, En1 = 0V, En2 = 1.5V
= 20 mA, En1 = 1.5V, En2 = 0V
= 14V, Cntrl = 0V (16)
= 23V, Cntrl = 0V (25)
= 32V, Cntrl = 0V (35)
= 42V, Cntrl = 0V (44)
Internally Limited
−65˚C to +150˚C
−0.3V to V
−0.3V to +5.5V
−0.3V to +5.5V
−0.3V to +5.5V
−0.3V to +5.5V
−0.3V to +5.5V
−0.3V to +48V
−0.3V to +48V
(Notes 6, 1)
+150˚C
Conditions
OUT1
(Notes 6, 7) Limits in standard typeface are for T
4
Operating Conditions
Thermal Properties
ESD Rating (Note 2)
Junction Temperature (T
Ambient Temperature (T
Input Voltage, V
Cntrl, En1, and En2 Pins
Junction-to-Ambient Thermal Resistance (θ
Micro SMD Package
Leadless Leadframe Package
Human Body Model:
Machine Model:
IN
Pin
0.18
Min
250
400
450
450
2.5
0.8
90
J
A
J
) Range
≤ +125˚C). Unless otherwise
) Range
0.25
0.55
0.01
Typ
400
600
750
750
0.5
1.9
0.1
2.5
0.1
0.1
0.1
0.1
0.1
64
95
6
1
5
7
(Note 4)
(Notes 1, 6)
1050
1050
Max
650
800
500
5.5
0.3
1.2
1.1
15
10
14
−40˚C to +125˚C
1
3
3
5
5
3
3
3
3
−40˚C to +85˚C
JA
)
2.5V to 5.5V
J
0V to 5.5V
= 25˚C.
65˚C/W
49˚C/W
Units
MHz
mA
mA
mA
200V
µA
µA
nA
µA
µA
µA
%
Ω
Ω
Ω
2 kV
V
V