S-882125AMH-M2ATFZ Datasheet, PDF (7/24 Pages) Seiko Instruments Inc – VOLTAGE REGULATION

Rev.5.1_01
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
S-8821 Series
 Electrical Characteristics
Table 5
(VIN=(VOUT(S) × 0.60) V^*1, Ta=25°C unless otherwise specified)
Items
Symbols
Conditions
Min.
Typ.
Max.
Units
Test
circuits
Operation input voltage VIN
VOUT(S) ≤ 2.9 V
VOUT(S) > 2.9 V
1.6
⎯
5.0
V
2
VOUT(S) ×
0.54
⎯
5.0
V
2
Output voltage^*2
VOUT(E)
IOUT=10 mA
VOUT(S) ×
0.98
VOUT(S)
VOUT(S) ×
1.02
V
2
Output current^*3
IOUT
VIN=(VOUT(S) × 0.54) V^*6
VIN=(VOUT(S) × 0.60) V^*1
5
⎯
⎯
mA
2
15
⎯
⎯
mA
2
Line regulation
Load regulation
Ripple voltage^*4
Maximum oscillation
frequency
ΔVOUT1
ΔVOUT2
VRIP
fosc
VIN=(VOUT(S) × 0.80) V
VIN=(VOUT(S) × 0.60) V^*1
to (VOUT(S) − 0.10) V,
IOUT=10 mA
IOUT=0.1 mA to 10 mA
IOUT=10 mA
VOUT=(VOUT(S) × 0.60) V,
Measure waveform at C− pin
25
⎯
⎯
mA
2
⎯
50
100
mV
2
⎯
40
80
mV
2
⎯
70
⎯
mVp−p
2
800 1000 1200 kHz
2
Efficiency^*5
η
Operation consumption
current
ISS1
Standby consumption
current
ISSS
ON/OFF pin input
voltage (high level)
VSH
VIN=(VOUT(S) × 0.54) V,
VOUT(S) ≥ 3.0 V, IOUT=5 mA
⎯
90
⎯
%
1
VIN=VOUT(S),
VOUT=(VOUT(S) + 0.5) V
⎯
35
60
μA
2
VIN=(VOUT(S) × 0.54) V^*6 to 5.0 V,
VON/OFF=0 V
⎯
0.3
1.0
μA
1
VIN=(VOUT(S) × 0.54) V^*6 to 5.0 V
1.5
⎯
⎯
V
1
ON/OFF pin input
voltage (low level)
VSL
VIN=(VOUT(S) × 0.54) V^*6 to 5.0 V
⎯
⎯
0.3
V
1
ON/OFF pin input
current (high level)
ISH
VIN=(VOUT(S) × 0.54) V^*6 to 5.0 V
−0.1
⎯
0.1
μA
1
ON/OFF pin input
current (low level)
ISL
VIN=(VOUT(S) × 0.54) V^*6 to 5.0 V
−0.1
⎯
0.1
μA
1
Soft start time
tSS
IOUT=10 mA
0.2
1.0
4.0
ms
1
*1. In case of VOUT ≤ 3.3 V, VIN=2.0 V
*2. VOUT(E): Actual output voltage
VOUT(S): Specified output voltage
*3. The output current at which the output voltage becomes 97 % of VOUT(E) after gradually increasing the
output current.
*4. Design assurance
*5. The ideal efficiency is indicated by the following expression.
Efficiency (η)=(VOUT × IOUT) / (2.0 × VIN × IOUT)
*6. In case of VOUT ≤ 2.9 V, VIN=1.6 V
7