lt3471edd-trpbf Linear Technology Corporation, lt3471edd-trpbf Datasheet - Page 7

• Manufacturer Part Number: lt3471edd-trpbf
• Description: Dual 1.3a, 1.2mhz Boost/inverter In 3mm ? 3mm Dfn
• Manufacturer: Linear Technology Corporation

APPLICATIONS
sufficient for most applications. Table 2 shows a list of
several ceramic capacitor manufacturers. Consult the
manufacturers for detailed information on their entire
selection of ceramic parts.
Table 2. Ceramic Capacitor Manufacturers
Taiyo Yuden
AVX
Murata
The decision to use either low ESR (ceramic) capacitors or
the higher ESR (tantalum or OS-CON) capacitors can
0.5A/DIV
I
2V/DIV
SUPPLY
V
OUT1
Start-Up without Soft-Start RC Network
Supply Current of Figure 2 During
0V
0V
[phone]
[phone]
[phone]
CONTROL 1
CONTROL 2
U
2.6V TO 4.2V
INFORMATION
Li-Ion
1.8V
1.8V
U
0.1ms/DIV
V
IN
0.33µF
0.33µF
R
R
4.7k
4.7k
10µF
SS1
C
SS2
C
SS1
SS2
W
www.t-yuden.com
www.avxcorp.com
www.murata.com
V
9
8
7
IN
SHDN/SS1
V
SHDN/SS2
IN
3471 F02b
2.2µH
GND
V
Figure 2. Li-Ion OLED Driver
L1
U
IN
11
C1, C2: X5R OR X7R 6.3V
C3, C4: X5R OR X7R 10V
C5: XR5 OR X7R 16V
C
PL
LT3471
: OPTIONAL
SW1
10µH
L2
10
SW2
6
1µF
FB1N
FB1P
FB2N
FB2P
C5
V
affect the stability of the overall system. The ESR of any
capacitor, along with the capacitance itself, contributes a
zero to the system. For the tantalum and OS-CON capaci-
tors, this zero is located at a lower frequency due to the
higher value of the ESR, while the zero of a ceramic capaci-
tor is at a much higher frequency and can generally be
ignored.
A phase lead zero can be intentionally introduced by
placing a capacitor (C
between V
of the zero is determined by the following equation.
REF
1
2
3
5
4
D1
D2
15µH
L3
0.5A/DIV
I
2V/DIV
SUPPLY
D1, D2: ON SEMICONDUCTOR MBRM-120
L1: SUMIDA CR43-2R2
L2: SUMIDA CDRH4D18-100
L3: SUMIDA CDRH4D18-150
V
OUT1
C2
0.1µF
OUT
105k
R1
and V
C
33pF
Start-Up with Soft-Start RC Network
PL
Supply Current of Figure 2 During
R2
15k
FB
C6
75pF
R3
90.9k
R4
15k
PL
as shown in Figure 2. The frequency
3471 F02
C4
10µF
) in parallel with the resistor (R3)
0.2ms/DIV
C3
4.7µF
V
7V
V
–7V
OUT1
OUT2
LT3471
3471 F02c
3471fa
7