LT3465AES6#TRMPBF Linear Technology, LT3465AES6#TRMPBF Datasheet - Page 8

• Manufacturer Part Number: LT3465AES6#TRMPBF
• Description: IC LED DRIVR WHITE BCKLGT TSOT-6
• Manufacturer: Linear Technology
• Type: Backlight, White LEDr

Specifications of LT3465AES6#TRMPBF

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 1.8MHz ~ 2.8MHz
• Voltage - Supply: 2.7 V ~ 16 V
• Voltage - Output: 30V
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-6, TSOT-6
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 20mA
• Internal Switch(s): Yes
• Efficiency: 79%
• No. Of Outputs: 1
• Output Current: 340mA
• Output Voltage: 30V
• Input Voltage: 2.7V To 16V
• Dimming Control Type: PWM
• Operating Temperature Range: -40°C To +85°C
• Driver Case Style: TSOT-23
• Rohs Compliant: Yes
• Operating Supply Voltage (typ): 3.3/5/9/12/15V
• Number Of Segments: 6
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Package Type: TSOT-23
• Pin Count: 6
• Mounting: Surface Mount
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 16V
• Led Driver Application: Cell Phones, PDA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LT3465AES6#TRMPBFTR

APPLICATIO S I FOR ATIO
LT3465/LT3465A
skipping using a 1k resistor from FB to GND. The photo
in Figure 3b details circuit operation driving three white
LEDs at a 0.2mA load. Peak inductor current is less
than 30mA.
Inductor Selection
A 22µH inductor is recommended for most LT3465 appli-
cations. Although small size and high efficiency are major
concerns, the inductor should have low core losses at
1.2MHz and low DCR (copper wire resistance). Some
inductors in this category with small size are listed in
Table 1. The efficiency comparison of different inductors
is shown in Figure 4a. A 22µH or 10µH inductor is recom-
mended for most LT3465A applications. The inductor
should have low core losses at 2.4MHz and low DCR. The
efficiency comparison of different inductors is shown in
figure 4b.
Table 1. Recommended Inductors
PART
NUMBER
LQH32CN220
LQH2MCN220
ELJPC220KF
CDRH3D16-220
LB2012B220M
LEM2520-220
8
DCR (Ω)
0.71
0.53
2.4
1.7
4.0
5.5
U
CURRENT RATING
U
(mA)
250
185
160
350
125
75
W
MANUFACTURER
Murata
814-237-1431
www.murata.com
Panasonic
714-373-7334
www.panasonic.com
Sumida
847-956-0666
www.sumida.com
Taiyo Yuden
408-573-4150
www.t-yuden.com
Taiyo Yuden
408-573-4150
www.t-yuden.com
U
Capacitor Selection
The small size of ceramic capacitors makes them ideal for
LT3465 and LT3465A applications. X5R and X7R types are
recommended because they retain their capacitance over
wider voltage and temperature ranges than other types
such as Y5V or Z5U. A 1µF input capacitor and a 0.22µF
output capacitor are sufficient for most LT3465 and
LT3465A applications.
Table 2. Recommended Ceramic Capacitor Manufacturers
MANUFACTURER
Taiyo Yuden
Murata
Kemet
Figure 4b. Efficiency Comparison of Different Inductors (LT3465A)
Figure 4a. Efficiency Comparison of Different Inductors (LT3465)
85
55
50
80
75
70
65
60
55
50
80
75
70
65
60
0
0
V
4 LEDs
V
4 LEDs
IN
IN
= 3.6V
= 3.6V
5
PHONE
408-573-4150
814-237-1431
408-986-0424
5
LED CURRENT (mA)
LED CURRENT (mA)
MURATA LQH32CN220
TAIYO YUDEN LB2012B220M
TAIYO YUDEN CB2012B220
MURATA LQH32CN220
MURATA LQH32CN100
MURATA LQH2MCN220
TOKO D312-220
TOKO D312-100
TAIYO YUDEN LB2012B220
10
10
15
15
URL
www.t-yuden.com
www.murata.com
www.kemet.com
3465A F04b
3465A F04b
20
20
3465afa