S-8335A160FT-TB-G Seiko Instruments, S-8335A160FT-TB-G Datasheet - Page 14

• Manufacturer Part Number: S-8335A160FT-TB-G
• Description: IC REG SW 3CH STEP UP 24-TSSOP
• Manufacturer: Seiko Instruments
• Type: Step-Up (Boost), Invertingr

Specifications of S-8335A160FT-TB-G

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 7.48 ~ 13.93 V, -5.44 ~ -10.13 V
• Frequency - Switching: 100kHz
• Voltage - Input: 2.4 ~ 5 V
• Operating Temperature: -20°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Power - Output: 650mW
• Output Voltage: 13.93 V
• Operating Temperature Range: - 20 C to + 70 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

14
STEP-UP, FOR LCD BIAS SUPPLY, 3-CHANNEL SWITCHING REGULATOR
S-8335 Series
V
The CONT pin voltage rises by the voltage corresponding to V
Change with time of current (I
Result of integrating the above equation:
During t
V
lowest value after time t
diode to C
maximum value (ripple voltage: V
load current I
This ripple voltage value is calculated below.
I
Since I
(7):
The following is obtained by substituting equation (10) into equation (9):
OUT
L:
OUT
when the time from immediately after t
, the capacitor (C
∴
I
I
t
V
dI
V
dt
1
L
OUT
L
OUT
L
t
=
L
=
ON
1
=0 at time t
=
t
=
I
=
(V
=
OFF
(
PK
, the energy is stored in L and not transmitted to V
+
V
OUT
(
V
I
I
L
D
L
V
OUT
PK
PK
L
−
: Diode forward voltage)
−
OUT
D
, and the C



=



−
−
−
V
+
I



I
I
.
V
V
OUT
OUT
PK
OUT
V
V
OUT
IN
D
OUT
OFF
)



)
+
=
−
•
•
+
L



t
V
OUT
+
t
V
I
OFF
L
OFF
V
V
(when all inductor energy was emitted), the following is obtained from equation
PK
D
L
V
IN
D
ON
OUT
−
) energy is used. As a result, the C
D
OUT
−
V
−
. When M1 is turned off, the energy stored in L is transmitted through the
V
IN
V
+
IN
L
IN
L
pin voltage rises dramatically. V
V
) that flows to V



......................................................................................................
......................................................................................................
......................................................................................................
D
•



t
−
•
.................................................................................................
t
V
1
P-P
..............................................................................................
IN
Seiko Instruments Inc.
) when the current flowing through the diode to V



.........................................................................................
....................................................................................
ON
until V
OUT
through a diode during time t
OUT
reaches its highest level is set to t
OUT
OUT
OUT
OUT
. When output current (I
pin voltage decreases and reaches its
+ V
is a time function that indicates the
D
.
OFF
:
OUT
OUT
1
:
Rev.6.0
matches the
) flows from
(10)
(11)
(5)
(6)
(7)
(8)
(9)
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