S-8351A20MC-J2FT2X Datasheet, PDF (36/51 Pages) Seiko Instruments Inc – SWITCHING REGULATOR CONTROLLER

STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
S-8351/8352 Series
Rev.3.0_01
2. Step-up Characteristics (Ta = 25°C)
The data of the step-up characteristics ((a) Input voltage (VIN) vs. Output voltage (VOUT) characteristics (Input voltage
stepped up), (b) Input voltage (VIN) vs. Output voltage (VOUT) characteristics (Input voltage stepped down), (c) Output
current (IOUT) vs. Output voltage (VOUT) characteristics, (d) Output current (IOUT) vs. Efficiency (η) characteristics
under conditions of 1 to 12 in Table 18 is shown below.
Condition 1 S-8351A30MC
(a) Input voltage (VIN) vs. Output voltage (VOUT)
(Input voltage raising)
3.2
3.1
3.0
2.9
2.8
2.7
2.6
0
IIIIII_{OOOOOOUUUUUUTTTTTT}
=
=
=
=
=
=
0.1 mA
1 mA
10 mA
20 mA
50 mA
100 mA
1
2
3
4
V_IN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT)
3.2
3.1
3.0
VVV_IIINNN
=
=
=
1.0
1.5
1.8
V,
V,
V
VV_IINN
=
=
2.0
2.5
V
V
2.9
2.8
2.7
2.6
0
50 100 150 200 250
I_OUT [mA]
Condition 2 S-8351A30MC
(b) Input voltage (VIN) vs. Output voltage (VOUT)
(Input voltage falling)
3.2
3.1
3.0
2.9
2.8
2.7
2.6
IIIIII_{OOOOOOUUUUUUTTTTTT}
=
=
=
=
=
=
0.1 mA
1 mA
10 mA
20 mA
50 mA
100 mA
0
1
2
3
4
V_IN [V]
(d) Output current (IOUT) vs. Efficiency (η)
90
80
70
60
50
0.01 0.1
VVVVV_IIIIINNNNN
=
=
=
=
=
1.0
1.5
1.8
2.0
2.5
V
V
V
V
V
1
10
I_OUT [mA]
100 1000
(a) Input voltage (VIN) vs. Output voltage (VOUT)
(Input voltage raising)
3.2
3.1
3.0
2.9
2.8
2.7
2.6
0
IIIIII^{OOOOOOUUUUUUTTTTTT}
=
=
=
=
=
=
0.1 mA
1 mA
10 mA
20 mA
50 mA
100 mA
1
2
3
4
V_IN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT)
3.2
3.1
3.0
VVV_IIINNN
=
=
=
1.0
1.5
1.8
V,
V,
V
VV_IINN
=
=
2.0
2.5
V
V
2.9
2.8
2.7
2.6
0
50 100 150 200 250
I_OUT [mA]
(b) Input voltage (VIN) vs. Output voltage (VOUT)
(Input voltage falling)
3.2
3.1
3.0
2.9
2.8
2.7
2.6
0
IIIIII_{OOOOOOUUUUUUTTTTTT}
=
=
=
=
=
=
0.1 mA
1 mA
10 mA
20 mA
50 mA
100 mA
1
2
3
4
V_IN [V]
(d) Output current (IOUT) vs. Efficiency (η)
90
80
70
60
50
VVVVV_IIIIINNNNN
=
=
=
=
=
1.0
1.5
1.8
2.0
2.5
V
V
V
V
V
0.01 0.1 1
10 100 1000
I_OUT [mA]
36