S-8540A15FN-IAAT2Z Datasheet, PDF (25/36 Pages) Seiko Instruments Inc – SWITCHABLE SWITCHING REGULATOR CONTROLLER

STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_01
S-8540/8541 Series
2. 2 Shutdown pin response (VON/OFF : 0 → 2.5 V IOUT: no Load)
(1) S-8540A33FN (VIN: 4.95V)
(2) S-8540A33FN (VIN: 10V)
4V
4V
V_{O N/O FF}
(1 V/div)
0V
3V
V_OUT
(1 V/div)
0V
t (4 ms/div)
(3) S-8540C33FN (VIN: 4.95 V)
4V
V_{O N/O FF}
(1 V/div)
0V
3V
VO UT
(1 V/div)
0V
t (4 ms/div)
(4) S-8540C33FN (VIN: 10 V)
4V
V_{O N/O FF}
(1 V/div)
0V
3V
VO UT
(1 V/div)
0V
t (4 ms/div)
(5) S-8540A18FN (VIN: 4.95 V)
4V
V_{ON /OFF}
(1 V/div)
0V
1.5 V
V_OUT
(0.5 V/div)
0V
t (4 ms/div)
V_{O N/OF F}
(1 V/div)
0V
3V
V_OUT
(1 V/div)
0V
t (4 ms/div)
(6) S-8540A18FN (VIN: 10 V)
4V
V_{ON /OFF}
(1 V/div)
0V
1.5 V
V_OUT
(0.5 V/div)
0V
t (4 ms/div)
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