S-8353A20MC-IQFT2X Datasheet, PDF (12/49 Pages) Seiko Instruments Inc – BUILT-IN TRANSISTOR SWITCHING REGULATOR

STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series
Rev.3.0_01
(2) 30 kHz Product (C Type)
Table 15
(Ta = 25°C unless otherwise specified)
Item
Symbol
Condition
Min. Typ. Max.
Unit
Measurement
circuit
Output voltage
VOUT
−
VOUT(S) VOUT(S) VOUT(S)
× 0.976
× 1.024
V
2
Input voltage
VIN
−
−
−
10
V
2
Operation start voltage
VST1
IOUT = 1 mA
−
−
0.9
V
2
Oscillation start voltage
VST2
No external parts, Voltage applied to VOUT
−
−
0.8
V
1
Operation holding voltage
VHLD
IOUT = 1 mA, Judged by decreasing VIN
voltage gradually
0.7
−
−
V
2
S-835xx20 to 29 −
9.8 16.4 μA
1
S-835xx30 to 39 − 13.1 21.9 μA
1
Current consumption 1
ISS1
VOUT = VOUT(S) × 0.95
S-835xx40 to 49 − 16.8 28.0 μA
1
S-835xx50 to 59 − 20.7 34.5 μA
1
S-835xx60 to 65 − 24.8 41.4 μA
1
S-835xx20 to 29 − 435 9.0
μA
1
S-835xx30 to 39 −
4.7 9.4
μA
1
Current consumption 2
ISS2
VOUT = VOUT(S) + 0.5 V
S-835xx40 to 49 −
4.9 9.7
μA
1
S-835xx50 to 59 −
5.1 10.1 μA
1
S-835xx60 to 65 −
5.2 10.4 μA
1
S-835xx20 to 24 52 83
−
mA
1
S-835xx25 to 29 62 100 −
mA
1
Switching current
ISW
VCONT = 0.4 V
S-835xx30 to 39 72 115 −
mA
1
S-835xx40 to 49 88 141 −
mA
1
S-835xx50 to 59 100 160 −
mA
1
S-835xx60 to 65 108 172 −
mA
1
Switching transistor leakage
current
ISWQ
VCONT = VOUT = 10 V
−
−
0.5
μA
1
Line regulation
ΔVOUT1
VIN = VOUT(S) × 0.4 to × 0.6
−
30 60
mV
2
Load regulation
Output voltage temperature
coefficient
ΔVOUT2
∆VOUT
∆Ta • VOUT
IOUT = 10 μA to VOUT(S) / 250 × 1.25
Ta = −40°C to +85°C
−
30 60
mV
2
− ±50 − ppm / °C
2
Oscillation frequency
fOSC
VOUT = VOUT(S) × 0.95
25 30 35 kHz
1
Maximum duty ratio
MaxDuty
VOUT = VOUT(S) × 0.95
75 83 90
%
1
PWM / PFM switching duty
ratio (For S-8354 Series)
PFMDuty
VIN = VOUT(S) − 0.1 V, No-load
10 15 24
%
1
Soft start time
tSS
−
3.0 6.0 12.0 ms
2
Efficiency
EFFI
−
−
84
−
%
2
External parts
Coil:
CDRH6D28-101 of Sumida Corporation
Diode:
MA2Z748 (Shottky type) of Matsushita Electric Industrial Co., Ltd.
Capacitor: F93 (16 V, 22 μF tantalum type) of Nichicon Corporation
VIN = VOUT(S) × 0.6 applied, IOUT = VOUT(S) / 250 Ω
Remark VOUT(S) specified above is the set output voltage value, and VOUT is the typical value of the actual output voltage.
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