S-8540 Datasheet, PDF (30/36 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
1. Efficiency Characteristics : Efficiency (η) − Output current (I_OUT)
1. 1 S-8540A33FN
(3.3 V, 600 kHz, PWM control)
100
1. 2 S-8541A33FN
100
(3.3 V, 600 kHz, PWM/PFM control)
90
V_IN=4.0 V
90
V_IN=4.0 V
80
80
5.0 V
70
7.2 V
70
5.0 V _{7.2 V}
60
60
50
1
10
100
IOUT (mA)
1000
1. 3 S-8540A25FN
(2.5 V, 600 kHz, PWM control)
100
90
V_IN=3.0 V
50 ₁
10
100
I_OUT (mA)
1. 4 S-8541A25FN
1000
(2.5 V, 600 kHz, PWM/PFMcontrol)
100
90
V_IN=3.0 V
80
80
3.6 V
70
5.0 V
70
3.6 V
5.0 V
60
60
50
1
10
100
I_OUT (mA)
1000
1. 5 S-8540A18FN
(1.8 V, 600 kHz, PWM control)
100
90
V_IN=2.5 V
50
1
10
100
IOUT (mA)
1. 6 S-8541A18FN
1000
(1.8 V, 600 kHz, PWM/PFM control)
100
V_IN=2.5 V
90
80
80
70
5.0 V
70
3.6 V
3.6 V 5.0 V
60
60
50
1
10
100
IOUT (m A)
1000
50
1
10
100
I_OUT (mA)
1000
30
Seiko Instruments Inc.