S-8821 Seiko Instruments, S-8821 Datasheet - Page 6

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S-8821

Manufacturer Part Number
S-8821
Description
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
Manufacturer
Seiko Instruments
Datasheet

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*1. In case of V
*2. V
*3. The output current at which the output voltage becomes 97 % of V
*4. Design assurance
*5. The ideal efficiency is indicated by the following expression.
*6. In case of V
6
Operation input voltage V
Output voltage
Output current
Line regulation
Load regulation
Ripple voltage
Maximum oscillation
frequency
Efficiency
Operation consumption
current
Standby consumption
current
ON/OFF pin input
voltage (high level)
ON/OFF pin input
voltage (low level)
ON/OFF pin input
current (high level)
ON/OFF pin input
current (low level)
Soft start time
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
S-8821 Series
Electrical Characteristics
V
output current.
OUT(E)
OUT(S)
Efficiency (η)=(V
Items
*5
: Actual output voltage
: Specified output voltage
*2
*4
*3
OUT
OUT
≤ 3.3 V, V
≤ 2.9 V, V
V
I
ΔV
ΔV
V
f
η
I
I
V
V
I
I
t
OUT
OUT
osc
SS1
SSS
SH
SL
SS
Symbols
IN
OUT(E)
RIP
SH
SL
OUT1
OUT2
× I
IN
IN
OUT
=2.0 V
=1.6 V
) / (2.0 × V
V
V
I
V
V
V
V
I
I
I
V
Measure waveform at C− pin
V
V
V
V
V
V
V
V
V
V
I
OUT
OUT
OUT
OUT
OUT
OUT(S)
OUT(S)
IN
IN
IN
IN
OUT
IN
OUT(S)
IN
OUT
IN
ON/OFF
IN
IN
IN
IN
=(V
=(V
=(V
=(V
=(V
=V
=(V
=(V
=(V
=(V
=(V
=10 mA
=10 mA
=0.1 mA to 10 mA
=10 mA
=10 mA
=(V
=(V
to (V
OUT(S)
OUT(S)
OUT(S)
OUT(S)
OUT(S)
OUT(S)
OUT(S)
OUT(S)
OUT(S)
OUT(S)
OUT(S)
=0 V
≤ 2.9 V
> 2.9 V
≥ 3.0 V, I
OUT(S)
OUT(S)
IN
OUT(S)
Seiko Instruments Inc.
,
× I
Conditions
× 0.54) V
× 0.60) V
× 0.80) V
× 0.60) V
× 0.54) V,
× 0.54) V
× 0.54) V
× 0.54) V
× 0.54) V
× 0.54) V
× 0.60) V,
+ 0.5) V
OUT
− 0.10) V,
OUT
(V
Table 4
)
IN
=5 mA
=(V
*6
*1
*1
*6
*6
*6
*6
*6
to 5.0 V,
to 5.0 V
to 5.0 V
to 5.0 V
to 5.0 V
OUT(S)
× 0.60) V
V
V
OUT(S)
OUT(S)
Min.
0.54
0.98
−0.1
−0.1
800
OUT(E)
1.6
1.5
0.2
15
25
5
*1
, Ta=25°C unless otherwise specified)
×
×
after gradually increasing the
V
1000
Typ.
OUT(S)
0.3
1.0
50
40
70
90
35
V
OUT(S)
Max.
1200
1.02
100
5.0
5.0
1.0
0.3
0.1
0.1
4.0
80
60
×
mV
Units
kHz
mA
mA
mA
mV
mV
ms
μA
μA
μA
μA
%
V
V
V
V
V
Rev.3.1
p − p
circuits
Test
2
2
2
2
2
2
2
2
2
2
1
2
1
1
1
1
1
1
_00
Datasheet pdf - http://www.DataSheet4U.net/

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