S-8540 Datasheet, PDF (27/36 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
Rev.3.2_00
S-8540/8541 Series
2. 4 Load Variation (V_IN: 2.7 V or 5.0 V or 7.5 V, I_OUT: 0.1→500 mA, 500→0.1 mA)
(1) S-8540A33FN (V_IN: 4.95 V)
(2) S-8540A33FN (V_IN: 4.95 V)
500 mA
I_OUT
0.1 mA
500 mA
I_{OU T}
0.1 mA
V _OUT
(0.1 V/div)
t (0.2 ms/div)
(3) S-8540C33FN(V_IN: 4.95 V)
500 mA
I_OUT
0.1 mA
V_OUT
(0.1 V/div)
t (4 ms/div)
(4) S-8540C33FN(V_IN: 4.95 V)
500 mA
I_OUT
0.1 mA
V_OUT
(0.1 V/div)
t (0.2 ms/div)
(5) S-8540A18FN (V_IN: 2.7 V)
500 mA
I_{OU T}
0.1 mA
V_{O UT}
(0.1 V/div)
t (8 ms/div)
(6) S-8540A18FN (V_IN: 2.7 V)
500 mA
I_{OU T}
0.1 mA
V_{OU T}
(0.1 V/div)
t (0.2 ms/div)
V _OUT
(0.1 V/div)
t (4 ms/div)
Seiko Instruments Inc.
27