S-8355 Seiko Instruments, S-8355 Datasheet - Page 15

• Manufacturer Part Number: S-8355
• Description: (S-8355 - S-8358) PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR
• Manufacturer: Seiko Instruments

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Remark 1. V
External parts
V
With shutdown function :
For V
(For with shutdown function)
Soft start time
Efficiency
ON
Rev.6.6
IN
= V
/
Coil:
Diode:
Capacitor:
Transistor:
Base resistor (R
Base capacitor (C
DD
STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
OFF
OUT(S)
/ V
2. V
OUT
pin input current
Item
_00
× 0.6 applied, I
OUT(S)
DD
separate type : VDD pin is connected to VOUT pin
A step-up operation is performed from V
the output voltage and oscillation frequency. (V
less than 1.9 V.)
/ V
OUT
specified above is the set output voltage value, and V
b
):
b
separate type
):
OUT
I
I
t
EFFI
SH
SL
SS
CDRH6D28-470 of Sumida Corporation
RB461F (Schottky type) of Rohm Co., Ltd.
F93 (16 V, 47 µ F tantalum type) of Nichicon Corporation
CPH3210 of Sanyo Electric Co., Ltd.
1.0 k Ω
2200 pF (ceramic type)
Symbol
ON
= V
/
OUT(S)
OFF
/ 50 Ω
pin is connected to V
V
V
ON
ON
/
/
OFF
OFF
Seiko Instruments Inc.
= V
= 0 V
OUT(S)
Table 23 (2 / 2)
DD
Condition
× 0.95
= 0.8 V. However, 1.8 V ≤ V
−
−
OUT
DD
≥ 1.8 V must be applied for products with a set value of
OUT
is the typical value of the actual output voltage.
− 0.1
− 0.1
Min.
3.0
−
(Ta = 25 ° C unless otherwise specified)
DD
Typ.
≤ 10 V is recommended stabilizing
6.0
85
S-8355/56/57/58 Series
−
−
Max.
12.0
0.1
0.1
−
Unit
µA
µA
ms
%
Measurement
circuit
1
1
2
2
15