S-8337AAAA-P8T1G Datasheet, PDF (38/51 Pages) Seiko Instruments Inc – SWITCHING REGULATOR CONTROLLER

STEP-UP, 1.2 MHz HIGH-FREQUENCY, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8337/8338 Series
Rev.4.0_01
3. Reference data (2)
The data of output current (IOUT) vs. ripple voltage (Vr) characteristics is shown below.
3. 1 VOUT = 13.1 V (RFB1 = 7.5 kΩ, RFB2 = 620 Ω)
(1) fOSC = 1133 kHz, MaxDuty = 77 % (ROSC = 120 kΩ, RDuty = 180 kΩ) (2) fOSC = 700 kHz, MaxDuty = 77 % (ROSC = 200 kΩ, RDuty = 300 kΩ)
100
90
80
70
Vr ⁶⁰
[mV]
50
40
30
20
10
0
0.01 0.1
VIN = 5.0 V
1
10
IOUT [mA]
100 1000
(3) fOSC = 286 kHz, MaxDuty = 77 % (ROSC = 510 kΩ, RDuty = 750 kΩ)
100
90
80
70
Vr ⁶⁰
[mV]
50
40
30
20
10
0
0.01 0.1
VIN = 5.0 V
1
10
IOUT [mA]
100 1000
100
90
80
70
Vr ⁶⁰
[mV]
50
40
30
20
10
0
0.01 0.1
VIN = 5.0 V
1
10
IOUT [mA]
100 1000
3. 2 VOUT = 9.2 V (RFB1 = 8.2 kΩ, RFB2 = 1.0 kΩ)
(1) fOSC = 1133 kHz, MaxDuty = 77 % (ROSC = 120 kΩ, RDuty = 180 kΩ)
(2) fOSC = 700 kHz, MaxDuty = 77 % (ROSC = 200 kΩ, RDuty = 300 kΩ)
100
90
80
70
Vr ⁶⁰
[mV]
50
40
30
20
10
0
0.01 0.1
VIN = 3.3 V
VIN = 5.0 V
1
10
IOUT [mA]
100 1000
(3) fOSC = 286 kHz, MaxDuty = 77 % (ROSC = 510 kΩ, RDuty = 750 kΩ)
100
90
80
70
Vr ⁶⁰
[mV]
50
40
30
20
10
0
0.01 0.1
VIN = 3.3 V
VIN = 5.0 V
1
10
IOUT [mA]
100 1000
100
90
80
70
Vr ⁶⁰
[mV]
50
40
30
20
10
0
0.01 0.1
VIN = 3.3 V
VIN = 5.0 V
1
10
IOUT [mA]
100 1000
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