LTC3524EUF#PBF Linear Technology, LTC3524EUF#PBF Datasheet - Page 12

• Manufacturer Part Number: LTC3524EUF#PBF
• Description: IC TFT BIAS SUPPLY ADJ 24-QFN
• Manufacturer: Linear Technology

Specifications of LTC3524EUF#PBF

• Applications: LCD Display
• Voltage - Supply: 2.5 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-QFN
• Operating Supply Voltage (typ): 3.3/5V
• Number Of Segments: 8
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Package Type: QFN EP
• Pin Count: 24
• Mounting: Surface Mount
• Operating Supply Voltage (min): 2.5V
• Operating Supply Voltage (max): 6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Lead Free Status / Rohs Status: Compliant

LTC3524
APPLICATIONS INFORMATION
Inductor Selection
3.3μH to 15μH inductors are recommended for use with
the LTC3524’s two boost converters. The synchronous
LCD bias boost inductor should have a saturation current
(I
white LED boost inductor should have a rating of at least
600mA. In most applications, the inductor value for the
LCD bias will be larger (10μH to 15μH) to prevent opera-
tion in deep discontinuous mode. The inductor value for
the white LED can be smaller (3.3μH to 6.8μH), since it
operates at higher currents. Ferrite core materials are
strongly recommended for their superior high frequency
performance characteristics. Inductors meeting these
requirements are listed in Table 1. The maximum current
and DCR ranges in the table correspond to the respec-
tive Inductance range (for example, the 3.3μH inductor
12
SAT
) rating of at least 150mA, where the nonsynchronous
Table 1. Recommended Inductors
PART
ME3220
LP03010
MSS4020
SD3112
MIP3226D
LQH32CN
LQH2MC
CDRH3D16
CDRH2D14
NR3010
NR3015
3.3-15
3.3-10
3.3-15
3.3-15
4.7-15
4.7-15
3.3-15
3.3-12
3.3-15
3.3-15
(μH)
3-10
L
MAXIMUM
CURRENT
1300-700
1100-440
1000-200
1100-520
1200-560
950-570
970-405
650-300
300-200
820-420
750-400
(mA)
will have the highest maximum current and lowest DCR).
Shielded inductor series parts are in bold text.
The V
2.2μF using a low impedance connection to the battery.
The VLED output capacitor should be X5R type and at least
1μF for analog dimming and 4.7μF for PWM dimming.
The V
2.2μF and 10μF. A larger capacitor (10μF) should be used
if lower output ripple is desired or the output load required
is close to the 25mA maximum.
The charge pumps require fl ying capacitors (C2
CN
specifi ed performance. Ceramic X5R types are strongly
recommended for their low ESR and ESL and capacitance
vs bias voltage stability. The fi lter capacitors on V2x, VN,
+
0.14-0.52
0.09-0.33
0.16-0.65
0.15-0.58
0.09-0.41
0.12-0.32
0.16-0.74
DCR (Ω)
, and CH
0.2-0.52
0.1-0.16
0.1-0.36
0.8-1.6
IN
OUT
input capacitor should be an X5R type of at least
capacitor should also be an X5R type between
+
to CH
3.2 × 2.5 × 2.0
3.0 × 3.0 × 1.0
4.0 × 4.0 × 2.0
3.1 × 3.1 × 1.2
3.2 × 2.6 × 1.0
3.2 × 2.5 × 1.5
3.8 × 3.8 × 1.8
3.2 × 3.2 × 1.5
3.0 × 3.0 × 1.0
3.0 × 3.0 × 1.5
–
DIMENSIONS
2 × 1.6 × 0.9
(L × W × H)
) that should be at least 0.1μF to obtain
(mm)
www.cooperet.com
www.coilcraft.com
www.t-yuden.com
www.sumida.com
MANUFACTURER
www.murata.com
www.fdk.com
Taiyo Yuden
Coil Craft
Sumida
Cooper
Murata
FDK
+
to C2
3524f
–
,