S-8337AAAA-P8T1G Datasheet, PDF (37/51 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. 3 VOUT = 6.1 V (RFB1 = 5.1 kΩ, RFB2 = 1.0 kΩ)
(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 = 1.8 V
VIN = 3.3 V
100 1000
6.20
6.15
6.10
VOUT
[V] ^6.05
6.00
5.95
5.90
0.01
(2) fOSC = 700 kHz, MaxDuty = 77 % (ROSC = 200 kΩ, RDuty = 300 kΩ)
VIN = 1.8 V
VIN = 3.3 V
0.1
1
10
IOUT [mA]
(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 = 1.8 V
VIN = 3.3 V
100 1000
6.20
6.15
6.10
VOUT
[V] ^6.05
6.00
5.95
5.90
0.01
(3) fOSC = 286 kHz, MaxDuty = 77 % (ROSC = 510 kΩ, RDuty = 750 kΩ)
VIN = 1.8 V
VIN = 3.3 V
0.1
1
10
IOUT [mA]
(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 = 1.8 V
VIN = 3.3 V
100 1000
6.20
6.15
6.10
VOUT
[V] ^6.05
6.00
5.95
5.90
0.01
VIN = 1.8 V
VIN = 3.3 V
0.1
1
10
IOUT [mA]
100 1000
100 1000
100 1000
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