S-8540 Datasheet, PDF (32/36 Pages) Seiko Instruments Inc – STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER

STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8540/8541 Series
Rev.3.2_00
2. Ripple Voltage (V_rip) − Output Current (I_OUT) Characteristics
2. 1 S-8540A33FN
2. 2 S-8541A33FN
(3.3 V, 600 kHz, PWM control)
100
100
(3.3 V, 600 kHz, PWM/PFM control)
80
7.2 V
5.0 V
80
5.0 V
7.2 V
60
V_IN=4.0 V
60 VIN=4.0 V
40
40
20
20
0
1
10
100
1000
I_OUT (mA)
2. 3 S-8540A18FN
(1.8 V, 600 kHz, PWM control)
100
0
1
10
100
1000
I_OUT (mA)
2. 4 S-8541A18FN
100
(1.8 V, 600 kHz, PWM/PFM control)
80
80
60
3.6 V ^{5.0 V}
60
3.6 V ^{5.0 V}
V_IN=2.5 V
40
V_IN=2.5 V
40
20
20
0
1
10
100
1000
I_OUT (mA)
2. 5 S-8540C33FN
(3.3 V, 600 kHz, PWM control)
100
0
1
10
100
1000
I_OUT (mA)
2. 6 S-8541C33FN
(3.3 V, 600 kHz, PWM/PFM control)
100
80
80
3.6 V
60
V_IN=2.5 V
5.0 V
60
VIN=2.5 V _{3.6 V}
40
40
5.0 V
20
20
0
1
10
100
1000
IOUT (mA)
2. 7 S-8540C18FN
(1.8 V, 300 kHz, PWM control)
100
0
1
10
100
I_OUT (mA)
2. 8 S-8541C18FN
1000
(1.8 V, 300 kHz, PWM/PFM control)
100
80
80
60
60
40
3.6 V
V_IN=2.5 V
5.0 V
40
V_IN=2.5 V _{3.6 V}
5.0 V
20
20
0
1
10
100
1000
I_OUT (mA)
0
1
10
100
1000
I_OUT (mA)
32
Seiko Instruments Inc.