S-8340A25AFT-T2-X Datasheet, PDF (7/55 Pages) Seiko Instruments Inc – SWITCHABLE SWITCHING REGULATOR CONTROLLER

STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_01
S-8340/8341 Series
 Electrical Characteristics
(1) 600 kHz, Output Voltage Fixed Type (A Type)
Table 5
Parameter
Symbol
Conditions
Output voltage^*1
Input voltage
Oscillation start voltage
Current consumption 1
V_OUT(E)
V_IN
V_ST
I_SS1
Current consumption 2
Current consumption
at shutdown
EXT pin output current
I_SS2
I_SSS
I_EXTH
I_EXTL
Line regulation
ΔV_OUT1
V_IN = V_OUT(S) × 0.6,
I_OUT = V_OUT(S)/50 Ω
−
No external parts.
The voltage is applied to V_OUT.
V_OUT = V_OUT(S) × 0.95,
EXT pin open
S-834xA25 − 34
S-834xA35 − 44
S-834xA45 − 54
S-834xA55 − 60
V_OUT = V_OUT(S) + 0.5 V, EXT pin open
V_OUT = V_OUT(S) × 0.95, V_ON/OFF = 0 V
V_EXT = V_OUT(E) − 0.2 V
S-834xA25 − 34
S-834xA35 − 44
S-834xA45 − 54
S-834xA55 − 60
V_EXT = 0.2 V
S-834xA25 − 34
S-834xA35 − 44
S-834xA45 − 54
S-834xA55 − 60
V_IN = V_OUT(S) × 0.4 to V_OUT(S) × 0.6
I_OUT = V_OUT(S)/50 Ω
Load regulation
ΔV_OUT2
V_IN = V_OUT(S) × 0.6, 10 μA ≤ I_OUT ≤ V_OUT(S)/40 Ω
Output voltage
ΔV_OUT
temperature coefficient^*2 ΔTa•V_OUT
Oscillation frequency
f_OSC
Maximum duty ratio
MaxDuty
PWM/PFM switching
duty ratio
(S-8341 Series A type)
PFMDuty
Current limit detection
voltage
V_SENSE
ON/OFF pin input voltage V_SH
V_SL
ON/OFF pin input
I_SH
leakage current
I_SL
Soft-start time
t_SS
Efficiency
EFFI
V_IN = V_OUT(S) × 0.6, I_OUT = V_OUT(S)/50 Ω,
Ta = −40 to +85°C
V_OUT = V_OUT(S) × 0.95
Measure waveform at the EXT pin
V_IN = V_OUT(S) × 0.95
Measure waveform at the EXT pin
V_IN = V_OUT(E) − 0.1 V, under no load
V_OUT = V_OUT(S) × 0.95
Judge oscillation at the EXT pin or oscillation
stop at “L”
V_OUT = V_OUT(S) × 0.95
Judge oscillation at the EXT pin.
V_OUT = V_OUT(S) × 0.95
Judge oscillation stop at the EXT pin.
V_OUT = 6 V, V_ON/OFF = 6 V
V_OUT = 6 V, V_ON/OFF = 0 V
V_IN = V_OUT(S) × 0.6, C_SS = 4700
pF, I_OUT = V_OUT(S)/50 Ω
S-8340Axx
Measure time until oscillation
occurs at the EXT pin.
S-8341Axx
V_IN = V_OUT(S) × 0.6,
I_OUT =V_OUT(S)/50 Ω
S-834xA25 − 34
S-834xA35 − 44
S-834xA45 − 54
S-834xA55 − 60
(Ta = 25°C unless otherwise specified)
Min. Typ. Max.
V_OUT(S)
× 0.98
−
V_OUT(S)
−
V_OUT(S)
× 1.02
6
Unit ^Measurement
Circuit
V
1
V
1
−
−
0.9
V
2
−
350
640
μA
2
−
460
810
μA
2
−
630 1060
μA
2
−
810 1250
μA
2
−
180
300
μA
2
−
−
3.0
μA
2
−13
−24
−
mA
−
−17
−30
−
mA
−
−21
−34
−
mA
−
−23
−37
−
mA
−
32
56
−
mA
−
42
69
−
mA
−
50
78
−
mA
−
56
85
−
mA
−
−
V_OUT(S)
× 0.5%
V_OUT(S)
× 1%
V
1
−
V_OUT(S)
× 0.5%
V_OUT(S)
× 1%
V
1
−
±100
− ppm/°C
1
510
600
690
kHz
2
73
82
89
%
2
19
27
35
%
1
90
120
150
mV
2
0.8
−
−
V
2
−
−
0.3
V
2
−0.1
−
0.1
μA
2
−0.1
−
0.1
μA
2
3.0
6.0
14.0
ms
1
3.0
8.0
14.0
ms
1
−
83
−
%
1
−
85
−
%
1
−
87
−
%
1
−
87
−
%
1
7