LM3500TL-21/NOPB National Semiconductor, LM3500TL-21/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM3500TL-21/NOPB
• Description: IC LED DRVR WHT BCKLT 8-MICROSMD
• Manufacturer: National Semiconductor
• Type: Backlight, White LEDr

Specifications of LM3500TL-21/NOPB

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 850kHz ~ 1.15MHz
• Voltage - Supply: 2.7 V ~ 7 V
• Voltage - Output: 19.5 V ~ 20.5 V
• Mounting Type: Surface Mount
• Package / Case: 8-MicroSMD
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 640mA
• Internal Switch(s): Yes
• Efficiency: 85%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM3500TL-21; LM3500TL-21TR

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OVP
I
I
SHDN
Threshold
I
V
ΔV
I
I
V
R
D
F
I
I
UVP
OVP
Vout
VL
Q
CL
B
SD
L
SW
FB
IN
DSON
Limit
Specifications in standard type face are for T
Range (T
Symbol
Symbol
FB
J
= −40°C to +125°C). Unless otherwise specified V
Output Overvoltage Protection
(LM3500-16)
Output Overvoltage Protection
(LM3500-21)
V
(LM3500-16)
V
(LM3500-21)
PMOS Switch Leakage
Current (LM3500-16)
PMOS Switch Leakage
Current (LM3500-21)
SHDN Low
SHDN High
Quiescent Current, Device Not
Switching
Quiescent Current, Device
Switching
Shutdown
Feedback Voltage
Feedback Voltage Line
Regulation
Switch Current Limit
(LM3500-16)
Switch Current Limit
(LM3500-21)
FB Pin Bias Current
Input Voltage Range
NMOS Switch R
PMOS Switch R
Duty Cycle Limit (LM3500-16) FB = 0V
Duty Cycle Limit (LM3500-21) FB = 0V
Switching Frequency
SHDN Pin Current (Note 10)
Switch Leakage Current
(LM3500-16)
Switch Leakage Current
(LM3500-21)
Input Undervoltage Lockout
Output Overvoltage Protection
(LM3500-16)
Output Overvoltage Protection
(LM3500-21)
OUT
OUT
Bias Current
Bias Current
Parameter
Parameter
DSON
DSON
ON Threshold
OFF Threshold
ON Threshold
OFF Threshold
V
V
V
V
FB > 0.54V
FB = 0V
SHDN = 0V
V
V
V
V
FB = 0.5V (Note 9)
V
V
SHDN = 5.5V
SHDN = 2.7V
SHDN = GND
V
V
ON Threshold
OFF Threshold
ON Threshold
OFF Threshold
ON Threshold
OFF Threshold
J
OUT
OUT
OUT
OUT
IN
IN
IN
IN
IN
OUT
SW
SW
= 25°C and those in boldface type apply over the full Operating Temperature
= 2.7V to 7V
= 2.7V to 7V
= 3.0V, Duty Cycle = 70%
= 3.0V, Duty Cycle = 63%
= 2.7V, I
= 15V
= 20V
= 15V, SHDN = V
= 20V, SHDN = V
= 15V, V
= 20V, V
= 6V, I
Conditions
Conditions
SW
SW
SW
SW
= 300mA
= 300mA
IN
= 0V
= 0V
=2.7V and specification apply to both LM3500-16 and LM3500-21.
4
IN
IN
(Note 7)
(Note 7)
0.47
Min
Min
1.1
2.7
0.8
2.4
2.3
15
14
20
19
15
14
20
19
(Note 8)
(Note 8)
15.5
14.6
20.5
19.5
0.01
0.01
0.65
0.65
0.95
0.01
0.01
15.5
14.6
20.5
19.5
Typ
Typ
260
300
400
670
1.8
0.1
0.5
0.1
1.1
1.0
0.1
2.5
2.4
45
87
94
18
9
(Note 7)
(Note 7)
Max
Max
0.53
0.43
400
460
200
0.3
1.2
2.5
0.4
7.0
2.3
1.2
0.5
2.0
2.6
2.5
16
15
21
20
30
16
16
15
21
20
3
3
2
Units
Units
MHz
%/V
mA
mA
µA
µA
µA
nA
µA
µA
Ω
%
V
V
V
V
V
V