S-8337AAAA-P8T1G Datasheet, PDF (35/51 Pages) Seiko Instruments Inc – SWITCHING REGULATOR CONTROLLER

STEP-UP, 1.2 MHz HIGH-FREQUENCY, PWM CONTROL SWITCHING REGULATOR CONTROLLER
Rev.4.0_01
S-8337/8338 Series
2. Reference data (1)
The data of (a) output current (IOUT) vs. efficiency (η) characteristics and (b) output current (IOUT) vs.
output voltage (VOUT) characteristics is shown below.
2. 1 VOUT = 13.1 V (RFB1 = 7.5 kΩ, RFB2 = 620 Ω)
(1) fOSC = 1133 kHz, MaxDuty = 77 % (ROSC = 120 kΩ, RDuty = 180 kΩ)
(a) IOUT vs. η
(b) IOUT vs. VOUT
100
90
80
70
η ⁶⁰
[%]
50
40
30
20
10
0
0.01 0.1
1
10
IOUT [mA]
VIN = 5.0 V
100 1000
13.20
13.15
13.10
VOUT
[V] ^13.05
13.00
12.95
12.90
0.01
(2) fOSC = 700 kHz, MaxDuty = 77 % (ROSC = 200 kΩ, RDuty = 300 kΩ)
VIN = 5.0 V
0.1
1
10
IOUT [mA]
(a) IOUT vs. η
(b) IOUT vs. VOUT
100 1000
100
90
80
70
η ⁶⁰
[%]
50
40
30
20
10
0
0.01 0.1
1
10
IOUT [mA]
VIN = 5.0 V
100 1000
13.20
13.15
13.10
VOUT
[V] ^13.05
13.00
12.95
12.90
0.01
(3) fOSC = 286 kHz, MaxDuty = 77 % (ROSC = 510 kΩ, RDuty = 750 kΩ)
VIN = 5.0 V
0.1
1
10
IOUT [mA]
(a) IOUT vs. η
(b) IOUT vs. VOUT
100 1000
100
90
80
70
η ⁶⁰
[%]
50
40
30
20
10
0
0.01 0.1
1
10
IOUT [mA]
VIN = 5.0 V
100 1000
13.20
13.15
13.10
VOUT
[V] ^13.05
13.00
12.95
12.90
0.01
VIN = 5.0 V
0.1
1
10
IOUT [mA]
100 1000
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